# MAR-10301706-2.v1 - North Korean Remote Access Tool: VIVACIOUSGIFT

**us-cert.cisa.gov/ncas/analysis-reports/ar20-239b**

## Notification

This report is provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of
any kind regarding any information contained herein. The DHS does not endorse any commercial product or service referenced in this bulletin
or otherwise.

This document is marked TLP:WHITE--Disclosure is not limited. Sources may use TLP:WHITE when information carries minimal or no
foreseeable risk of misuse, in accordance with applicable rules and procedures for public release. Subject to standard copyright rules,
TLP:WHITE information may be distributed without restriction. For more information on the Traffic Light Protocol (TLP), see http://www.uscert.gov/tlp.

## Summary

Description

This Malware Analysis Report (MAR) is the result of analytic efforts between the Department of Homeland Security (DHS), the Federal Bureau
of Investigation (FBI), and the Department of Defense (DoD). Working with U.S. Government partners, DHS, FBI, and DoD identified Remote
Access Tool (RAT) malware variants used by the North Korean government. This malware variant has been identified as VIVACIOUSGIFT. The
U.S. Government refers to malicious cyber activity by the North Korean government as HIDDEN COBRA. For more information on HIDDEN
COBRA activity, visit https[:]//www[.]us-cert.gov/hiddencobra.

FBI has high confidence that HIDDEN COBRA actors are using malware variants in conjunction with proxy servers to maintain a presence on
victim networks and to further network exploitation. DHS, FBI, and DoD are distributing this MAR to enable network defense and reduce
exposure to North Korean government malicious cyber activity.

This MAR includes malware descriptions related to HIDDEN COBRA, suggested response actions and recommended mitigation techniques.
Users or administrators should flag activity associated with the malware and report the activity to the Cybersecurity and Infrastructure Security
Agency (CISA) or the FBI Cyber Watch (CyWatch), and give the activity the highest priority for enhanced mitigation.

This report looks at the malware samples known as VIVACIOUSGIFT that is used by advanced persistent threat (APT) cyber actors as a
network proxy tool. The proxy requires an encrypted command line argument for its source and destination Internet Protocol (IP) addresses
and has command and control (C2) functionality to retrieve and set the destination IP. The command line argument can also contain a source
proxy IP, port, and password. The source proxy is used as an additional proxy when communicating with the source IP. The library libcurl
version 7.94.1 is used when communicating with the source proxy.
[For a downloadable copy of IOCs, see MAR-10301706-2.v1.stix.](https://us-cert.cisa.gov/sites/default/files/publications/MAR-10301706-2.v1.WHITE.stix.xml)

Submitted Files (6)

70b494b0a8fdf054926829dcb3235fc7bd0346b6a19faf2a57891c71043b3b38 (70b494b0a8fdf054926829dcb3235f...)

8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1 (8cad61422d032119219f465331308c...)

9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852 (9a776b895e93926e2a758c09e341ac...)

a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118 (a917c1cc198cf36c0f2f6c24652e5c...)

aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83 (aca598e2c619424077ef8043cb4284...)

f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de (f3ca8f15ca582dd486bd78fd57c2f4...)

## Findings

**a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118**

Tags

HIDDEN-COBRAproxytrojan

Details

**Name** a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118

**Size** 408576 bytes

**Type** PE32 executable (GUI) Intel 80386, for MS Windows

**MD5** 40e698f961eb796728a57ddf81f52b9a


-----

**SHA1** 50b4f9a8fa6803f0aabb6fd9374244af40c2ba4c

**SHA256** a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118

**SHA512** 2ee35d902f2a4022488bdc75cf7531f75de7e8bb4ca8645a9448f33051e835f0cea62e0157ac292187cd9406901f80570b8e17be52fee4a

**ssdeep** 12288:E30MB7N+man4IrT0qhPyRg8o//ND6lAMYqcl:i0YNwrT0qhPFtHN2lLYq

**Entropy** 6.651902

Antivirus

**Ahnlab** Trojan/Win32.Banker

**Antiy** Trojan[Banker]/Win32.Agent

**Avira** TR/SpyBanker.Agent.AM

**BitDefender** Trojan.GenericKD.4446633

**ClamAV** Win.Trojan.Agent-6971031-0

**Comodo** TrojWare.Win32.Ransom.Teerac.C

**Cyren** W32/Banker.FTBC-3937

**ESET** Win32/Spy.Banker.ADRO trojan

**Emsisoft** Trojan.GenericKD.4446633 (B)

**Ikarus** Trojan-Spy.Banker

**K7** Riskware ( 0040eff71 )

**Lavasoft** Trojan.GenericKD.4446633

**McAfee** Generic.abb

**Microsoft Security Essentials** TrojanSpy:Win32/Banker

**NANOAV** Trojan.Win32.Agent.enikaf

**Quick Heal** TrojanSpy.Banker

**Sophos** Mal/Generic-L

**Symantec** Trojan Horse

**TrendMicro** BKDR_KL.89AB2FB2

**TrendMicro House Call** BKDR_KL.89AB2FB2

**Vir.IT eXplorer** Trojan.Win32.Banker.FUW

**VirusBlokAda** TrojanBanker.Agent

**Zillya!** Trojan.Agent.Win32.763316

YARA Rules


-----

u e C S _3 _ 030 06_0 dde Cob a O C bac doo d oppe p o y spy a e t oja
{
meta:
Author = "CISA Trusted Third Party"
Incident = "10301706.r2.v1"
Date = "2020-08-11"
Actor = "Hidden Cobra"
Category = "Backdoor Dropper Proxy Spyware Trojan"
Family = "TWOPENCE"
Description = "Detects strings in TWOPENCE proxy tool"
MD5_1 = "40e698f961eb796728a57ddf81f52b9a"
SHA256_1 = "a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118"
MD5_2 = "dfd09e91b7f86a984f8687ed6033af9d"
SHA256_2 = "aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83"
MD5_3 = "bda82f0d9e2cb7996d2eefdd1e5b41c4"
SHA256_3 = "f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de"
MD5_4 = "97aaf130cfa251e5207ea74b2558293d"
SHA256_4 = "9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852"
MD5_5 = "889e320cf66520485e1a0475107d7419"
SHA256_5 = "8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1"
strings:
$cmd1 = "ssylka"
$cmd2 = "ustanavlivat"
$cmd3 = "poluchit"
$cmd4 = "pereslat"
$cmd5 = "derzhat"
$cmd6 = "vykhodit"
$cmd7 = "Nachalo"
$cmd8 = "kliyent2podklyuchit"
$frmt1 = "Host: %s%s%s:%hu"
$frmt2 = "%s%s%s%s%s%s%s%s%s%s"
condition:
(4 of ($cmd*)) and (1 of ($frmt*))
}

ssdeep Matches

No matches found.

PE Metadata

**Compile Date** 2016-07-08 19:11:36-04:00

**Import Hash** 3415ed7e09a44243bcabe4422aeef7dc

PE Sections

**MD5** **Name** **Raw Size** **Entropy**

0e135280ecde05507a86c5681ee38986 header 1024 2.480337

dfcc176fede07939cc4deb950858b6ce .text 333824 6.579572

d72f6b9398a7f267dfe5f1bd44778d62 .rdata 51712 6.391152

1e41f003bafe97cb5bfb59b3ad7d7531 .data 6656 3.459925

a8d51b81460671e8fb3df438f0f7fc28 .reloc 15360 5.531184

Packers/Compilers/Cryptors

Microsoft Visual C++ ?.?

Description

This file is a 32-bit Windows executable. The proxy requires a single command line argument. The argument can consist of a maximum of four
encrypted strings delineated with the pipe character ("|"). When the four strings are parsed and decrypted, the strings represent the following:
source IP and port, destination IP and port, source proxy IP and port, and source proxy password. The IP and port strings have the following
format: <IP:port>. If the destination IP is missing from the command line argument, the proxy will wait to get the destination IP from the actor.


-----

e sou ce p o y a d po t, as e as t e sou ce p o y pass o d, a e used as a add t o a p o y e co u cat g t t e sou ce
When communicating with the source proxy, the proxy will use libcurl with the options CURLOPT_HTTPPROXYTUNNEL and
CURLOPT_NOBODY.

The following is an example of an encrypted command line argument that is missing the destination IP:

--Begin encrypted command line argument-<encrypted_string>| |<encrypted_string>|<encrypted_string>
--End encrypted command line argument-
--Begin decrypted command line argument-<IP>:<port>| |<IP>:<port>|<password>
--End decrypted command line argument-
The encrypted strings inside the command line argument can be individually decrypted with the Python script provided in Figure 1.

Below is the flow of events that happens when the proxy starts and is issued the commands "ustanavlivat" and "pereslat". In the following
example, the command line argument does not contain a source proxy. The command line argument can contain a source proxy IP, port, and
password. If they exist, the proxy will route all traffic to the source IP through the source proxy. When communicating with the source proxy, the
proxy uses the library libcurl with options CURLOPT_HTTPPROXYTUNNEL and CURLOPT_NOBODY. The data that is sent and received is
encrypted using a custom encryption routine.

First, it connects to source IP and sends initialization message "Nachalo". It sends a custom hash of
"Dazdrav$958478Zohsf9q@%5555ahshdnZXniohs". In return it receives two bytes of data. It sends the length (4 bytes) of string
"kliyent2podklyuchit" and then sends the string "kliyent2podklyuchit". It sends the length (4 bytes) of string "Nachalo" and then sends the
"Nachalo".

Next, it receives C2 command "ustanavlivat" to set the destination IP address. It receives and decrypts the length of the string "ustanavlivat"
and then receives and decrypts the string "ustanavlivat".

Then, it receives C2 command "pereslat" to start the proxy functionality. It receives and decrypts the length of the string "pereslat" and then
receives and decrypts the string "pereslat".

Next, it connects to source IP and sends start proxy functionality message "ssylka". It sends a custom hash of
"Dazdrav$958478Zohsf9q@%5555ahshdnZXniohs". In response it receives data. Then it sends the length (4 bytes) of string
"kliyent2podklyuchit" and then sends the string "kliyent2podklyuchit". Then it sends the length (4 bytes) of string "ssylka" and then sends the
string "ssylka".

Finally, it connects to destination IP and starts proxy functionality between source and destination IP.

The proxy uses a custom encryption routine to encode the data sent. The Python script provided in Figure 2 can decode the data.
Screenshots

**Figure 1 - The Python script to individually decrypt the encrypted strings inside the command line argument.**


-----

**Figure 2 - The Python script to decode the encoded data sent by the proxy custom encryption routine.**

**aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83**

Tags

HIDDEN-COBRAdropperproxyspywaretrojan

Details

**Name** aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83

**Size** 232960 bytes

**Type** PE32 executable (GUI) Intel 80386, for MS Windows

**MD5** dfd09e91b7f86a984f8687ed6033af9d

**SHA1** b8fe7884d2dc4983fb0fbca192694ce2f4685e23

**SHA256** aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83

**SHA512** 641dd95c101ae7566defb1a24279badb8c7aa94331442e0f470866b6a1e44c8790a71e83cc1cb188d7530c08bf0e5d227d35caa9a2cf7e

**ssdeep** 3072:XU5r72JE+FYWR0jZLShk4cPT/QzSaQ0sCFneZTznIhZJJcrJ1GHeV9:XU5uJpYnZL05STQNddFnAnGZIrV

**Entropy** 6.524225

Antivirus

**Ahnlab** Trojan/Win32.Alreay

**Antiy** Trojan[Banker]/Win32.Alreay

**ClamAV** Win.Trojan.Agent-6971031-0

**Comodo** TrojWare.Win32.TrojanDropper.Agent.PRQ

**Cyren** W32/Alreay.SQQX-6406

**ESET** a variant of Win32/Spy.Banker.ADRO trojan

**K7** Spyware ( 005198041 )

**McAfee** GenericRXFQ-MX!DFD09E91B7F8

**Microsoft Security Essentials** TrojanSpy:Win32/Banker!dha

**Symantec** Trojan Horse

**TrendMicro** TSPY_BA.C25E7684

**TrendMicro House Call** TSPY_BA.C25E7684

**Zillya!** Trojan.Alreay.Win32.42

YARA Rules


-----

u e C S _3 _ 030 06_0 dde Cob a O C bac doo d oppe p o y spy a e t oja
{
meta:
Author = "CISA Trusted Third Party"
Incident = "10301706.r2.v1"
Date = "2020-08-11"
Actor = "Hidden Cobra"
Category = "Backdoor Dropper Proxy Spyware Trojan"
Family = "TWOPENCE"
Description = "Detects strings in TWOPENCE proxy tool"
MD5_1 = "40e698f961eb796728a57ddf81f52b9a"
SHA256_1 = "a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118"
MD5_2 = "dfd09e91b7f86a984f8687ed6033af9d"
SHA256_2 = "aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83"
MD5_3 = "bda82f0d9e2cb7996d2eefdd1e5b41c4"
SHA256_3 = "f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de"
MD5_4 = "97aaf130cfa251e5207ea74b2558293d"
SHA256_4 = "9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852"
MD5_5 = "889e320cf66520485e1a0475107d7419"
SHA256_5 = "8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1"
strings:
$cmd1 = "ssylka"
$cmd2 = "ustanavlivat"
$cmd3 = "poluchit"
$cmd4 = "pereslat"
$cmd5 = "derzhat"
$cmd6 = "vykhodit"
$cmd7 = "Nachalo"
$cmd8 = "kliyent2podklyuchit"
$frmt1 = "Host: %s%s%s:%hu"
$frmt2 = "%s%s%s%s%s%s%s%s%s%s"
condition:
(4 of ($cmd*)) and (1 of ($frmt*))
}

ssdeep Matches

**99** 9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852

PE Metadata

**Compile Date** 2016-09-18 23:24:39-04:00

**Import Hash** 6b8fa355d78d649f199232a25e22d630

PE Sections

**MD5** **Name** **Raw Size** **Entropy**

41a5273e6d92dfe9de72f76c18f6475f header 1024 2.398805

e6412e7fb561ead2b3eddef9bafd3518 .text 198656 6.554337

a9890fd54b24cf53425649a92fe290ad .rdata 18432 5.115959

884e0d48d1830995eeade874d295ced0 .data 5632 3.201975

0e79f25ba5ec9ae1502fe80ec7b08f79 .reloc 9216 5.674607

Packers/Compilers/Cryptors

Microsoft Visual C++ ?.?

Description

This file is a 32-bit Windows executable. It has similar functionality as
a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118.

**f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de**


-----

HIDDEN-COBRAproxytrojan

Details

**Name** f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de

**Size** 265216 bytes

**Type** PE32+ executable (GUI) x86-64, for MS Windows

**MD5** bda82f0d9e2cb7996d2eefdd1e5b41c4

**SHA1** 9ff715209d99d2e74e64f9db894c114a8d13229a

**SHA256** f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de

**SHA512** 6774cc49f5200d1a427b5a2af77d27eaac671f405e01f3ded2d152e5e08d1217d2b3b9d8508d2924aee5f0925abc32f83645756cf248222

**ssdeep** 6144:+TW3SZ4GvcPPWi9JhJTxPm26ebMk5Q35m8LERov:invQThJsexib

**Entropy** 6.304640

Antivirus

**Ahnlab** Trojan/Win32.Alreay

**Antiy** Trojan[Banker]/Win32.Alreay

**Avira** TR/AD.APTLazerus.dsenf

**BitDefender** Gen:Variant.Razy.368693

**ClamAV** Win.Trojan.Agent-6971031-0

**Comodo** Malware

**Cyren** W64/Alreay.C

**ESET** a variant of Win64/NukeSped.BB trojan

**Emsisoft** Gen:Variant.Razy.368693 (B)

**Ikarus** Trojan.Win64.Nukesped

**K7** Trojan ( 00538e2b1 )

**Lavasoft** Gen:Variant.Razy.368693

**McAfee** PWS-Banker.gen.gj

**Symantec** Trojan.Gen.6

**Systweak** trojan.banker

**TrendMicro** BKDR64_.8979788A

**TrendMicro House Call** BKDR64_.8979788A

**VirusBlokAda** TrojanBanker.Alreay

**Zillya!** Trojan.GenericKD.Win32.133035

YARA Rules


-----

u e C S _3 _ 030 06_0 dde Cob a O C bac doo d oppe p o y spy a e t oja
{
meta:
Author = "CISA Trusted Third Party"
Incident = "10301706.r2.v1"
Date = "2020-08-11"
Actor = "Hidden Cobra"
Category = "Backdoor Dropper Proxy Spyware Trojan"
Family = "TWOPENCE"
Description = "Detects strings in TWOPENCE proxy tool"
MD5_1 = "40e698f961eb796728a57ddf81f52b9a"
SHA256_1 = "a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118"
MD5_2 = "dfd09e91b7f86a984f8687ed6033af9d"
SHA256_2 = "aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83"
MD5_3 = "bda82f0d9e2cb7996d2eefdd1e5b41c4"
SHA256_3 = "f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de"
MD5_4 = "97aaf130cfa251e5207ea74b2558293d"
SHA256_4 = "9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852"
MD5_5 = "889e320cf66520485e1a0475107d7419"
SHA256_5 = "8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1"
strings:
$cmd1 = "ssylka"
$cmd2 = "ustanavlivat"
$cmd3 = "poluchit"
$cmd4 = "pereslat"
$cmd5 = "derzhat"
$cmd6 = "vykhodit"
$cmd7 = "Nachalo"
$cmd8 = "kliyent2podklyuchit"
$frmt1 = "Host: %s%s%s:%hu"
$frmt2 = "%s%s%s%s%s%s%s%s%s%s"
condition:
(4 of ($cmd*)) and (1 of ($frmt*))
}

ssdeep Matches

No matches found.

PE Metadata

**Compile Date** 2016-05-01 23:24:39-04:00

**Import Hash** b2b084698f33fd93bc9e72f0c2af26b5

PE Sections

**MD5** **Name** **Raw Size** **Entropy**

379ffb6e4aeb96c753dbe1f16dae01db header 1024 2.516799

33c1647f8f3a870e4c8f9b48b5ec2c82 .text 212480 6.373885

5bb6bf3a50e4982066d5746d99945853 .rdata 31232 5.302106

a62c434f5beb6282b437c5e0dc40c616 .data 7168 2.877953

6ba7963edd09a132976d6830462fc17f .pdata 11776 5.348074

06ce263d0dc81197b88ff3f576787648 .reloc 1536 2.915027

Packers/Compilers/Cryptors

Microsoft Visual C++ 8.0 (DLL)

Description

This file is a 64-bit Windows executable. It has similar functionality as
a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118.


-----

Tags

HIDDEN-COBRAproxyspywaretrojan

Details

**Name** 9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852

**Size** 232960 bytes

**Type** PE32 executable (GUI) Intel 80386, for MS Windows

**MD5** 97aaf130cfa251e5207ea74b2558293d

**SHA1** c7e7dd96fefca77bb1097aeeefef126d597126bd

**SHA256** 9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852

**SHA512** d8b750263ac8b295a934ef60a694108257c489055c6aee24bae000d70d0bdde70934e8c2a157d38c15469bc5fb2a6cfcb733ddd4729ba

**ssdeep** 3072:6U5r72JE+FYWR0jZLShk4cPT/QzSaQ0sCFneZTznIhZJJcrJ1GHeV9:6U5uJpYnZL05STQNddFnAnGZIrV

**Entropy** 6.524151

Antivirus

**Ahnlab** Trojan/Win32.Alreay

**Antiy** Trojan[Banker]/Win32.Alreay

**BitDefender** Trojan.Generic.22528938

**ClamAV** Win.Trojan.Agent-6971031-0

**Comodo** Malware

**Cyren** W32/Alreay.SQQX-6406

**ESET** a variant of Win32/Spy.Banker.ADRO trojan

**Emsisoft** Trojan.Generic.22528938 (B)

**Ikarus** Trojan-Spy.Agent

**K7** Spyware ( 005198041 )

**Lavasoft** Trojan.Generic.22528938

**McAfee** GenericRXFQ-MX!97AAF130CFA2

**Microsoft Security Essentials** Trojan:Win32/Alreay

**NANOAV** Trojan.Win32.Alreay.ettzed

**NetGate** Trojan.Win32.Malware

**Sophos** Troj/Banker-GUU

**Symantec** Trojan.Gen.2

**TrendMicro** Trojan.79245AFC

**TrendMicro House Call** Trojan.79245AFC

**VirusBlokAda** TrojanBanker.Alreay

**Zillya!** Trojan.Alreay.Win32.42

YARA Rules


-----

u e C S _3 _ 030 06_0 dde Cob a O C bac doo d oppe p o y spy a e t oja
{
meta:
Author = "CISA Trusted Third Party"
Incident = "10301706.r2.v1"
Date = "2020-08-11"
Actor = "Hidden Cobra"
Category = "Backdoor Dropper Proxy Spyware Trojan"
Family = "TWOPENCE"
Description = "Detects strings in TWOPENCE proxy tool"
MD5_1 = "40e698f961eb796728a57ddf81f52b9a"
SHA256_1 = "a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118"
MD5_2 = "dfd09e91b7f86a984f8687ed6033af9d"
SHA256_2 = "aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83"
MD5_3 = "bda82f0d9e2cb7996d2eefdd1e5b41c4"
SHA256_3 = "f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de"
MD5_4 = "97aaf130cfa251e5207ea74b2558293d"
SHA256_4 = "9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852"
MD5_5 = "889e320cf66520485e1a0475107d7419"
SHA256_5 = "8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1"
strings:
$cmd1 = "ssylka"
$cmd2 = "ustanavlivat"
$cmd3 = "poluchit"
$cmd4 = "pereslat"
$cmd5 = "derzhat"
$cmd6 = "vykhodit"
$cmd7 = "Nachalo"
$cmd8 = "kliyent2podklyuchit"
$frmt1 = "Host: %s%s%s:%hu"
$frmt2 = "%s%s%s%s%s%s%s%s%s%s"
condition:
(4 of ($cmd*)) and (1 of ($frmt*))
}

ssdeep Matches

**99** aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83

PE Metadata

**Compile Date** 2017-02-20 06:09:30-05:00

**Import Hash** 6b8fa355d78d649f199232a25e22d630

PE Sections

**MD5** **Name** **Raw Size** **Entropy**

bb573973d723ebac15a2dd783a56921f header 1024 2.372576

e6412e7fb561ead2b3eddef9bafd3518 .text 198656 6.554337

a9890fd54b24cf53425649a92fe290ad .rdata 18432 5.115959

884e0d48d1830995eeade874d295ced0 .data 5632 3.201975

0e79f25ba5ec9ae1502fe80ec7b08f79 .reloc 9216 5.674607

Packers/Compilers/Cryptors

Microsoft Visual C++ ?.?

Description

This file is a 32-bit Windows executable. It has similar functionality as
a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118.

**70b494b0a8fdf054926829dcb3235fc7bd0346b6a19faf2a57891c71043b3b38**


-----

HIDDEN-COBRAbackdoorproxytrojan

Details

**Name** 70b494b0a8fdf054926829dcb3235fc7bd0346b6a19faf2a57891c71043b3b38

**Size** 1637888 bytes

**Type** PE32 executable (GUI) Intel 80386, for MS Windows

**MD5** 3c9e71400b72cc0213c9c3e4ab4df9df

**SHA1** bdb632b27ddb200693c1b0b80819a7463d4e7a98

**SHA256** 70b494b0a8fdf054926829dcb3235fc7bd0346b6a19faf2a57891c71043b3b38

**SHA512** c7a02fadb9fbbe0cf05dddd6a78cbf48b9030638420b421b4ff83816ae1cabbe54656b4e1c8e4020cacab93388934b6c79d3d21fe560ed4

**ssdeep** 24576:5gDgaE2r55ENJSOZ8jsAMZMF2kPupVevS6ieT17cZ/hJMIYO0:+D9vrrs8OZxZI+wvTTahqO

**Entropy** 7.956784

Antivirus

**Ahnlab** Trojan/Win32.Agent

**Antiy** Trojan/Win32.AGeneric

**Avira** TR/Crypt.TPM.Gen

**BitDefender** Gen:Variant.Symmi.79278

**Comodo** Malware

**ESET** Win32/Spy.Banker.AECT trojan

**Emsisoft** Gen:Variant.Symmi.79278 (B)

**K7** Trojan ( 0040f4ef1 )

**Lavasoft** Gen:Variant.Symmi.79278

**McAfee** Generic Trojan.ej

**Microsoft Security Essentials** TrojanSpy:Win32/Banker

**NANOAV** Trojan.Win32.TPM.etiucd

**Quick Heal** Trojan.Generic

**Sophos** Troj/Agent-AXNK

**Symantec** Trojan.Gen.2

**TrendMicro** BKDR_KL.22A80489

**TrendMicro House Call** BKDR_KL.22A80489

**VirusBlokAda** Backdoor.Agent

**Zillya!** Backdoor.Agent.Win32.64626

YARA Rules

No matches found.

ssdeep Matches

No matches found.

PE Metadata

**Compile Date** 2017-02-20 06:09:30-05:00

**Import Hash** baa93d47220682c04d92f7797d9224ce

PE Sections


-----

**MD5** **Name** **Raw Size** **Entropy**

a32e7b28831808e208355ae637e006f0 header 4096 0.814733

ca42a315c5287101ffdf2d7843b74d34 119296 7.972251

d41d8cd98f00b204e9800998ecf8427e .rsrc 0 0.000000

9e66a842d63673e7febfc6646ea43c43 .idata 512 1.308723

5668c4714f706c7f669afb1e7f9c6ba7 512 0.260771

de90eb0d146d89f2c2dd76ecf17ea09e dworqjxn 1512960 7.955321

4857cc05e1ea968cfc978d53f2f34126 omrcmqfn 512 3.378388

Description

This file is a 32-bit Windows executable. It has similar functionality as
a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118.

**8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1**

Tags

HIDDEN-COBRAproxyspywaretrojan

Details

**Name** 8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1

**Size** 480768 bytes

**Type** PE32+ executable (DLL) (GUI) x86-64, for MS Windows

**MD5** 889e320cf66520485e1a0475107d7419

**SHA1** f5fc9d893ae99f97e43adcef49801782daced2d7

**SHA256** 8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1

**SHA512** 8da0ab0b3072b3966c5e32c22e7ac5654ff3923b3cf28cc895ae10d520a27bb70360e4d94e54422033aa7c7527d10774ab6d8b8569bab

**ssdeep** 6144:sdqAqUok+00rm9TOi9Vc7/VtXvWLnJlh+efvoRKmjbL/xY4fTKKWSFle3IDgDi2C:xABogwttXuLnJlkkiKU/xtKYydF9iIU

**Entropy** 6.465490

Antivirus

**Ahnlab** Trojan/Win32.Alreay

**Antiy** Trojan/Win32.BTSGeneric

**Avira** TR/Spy.Banker.xbkax

**BitDefender** Trojan.Generic.20466258

**ClamAV** Win.Trojan.Agent-6971031-0

**Comodo** Malware

**ESET** a variant of Win64/Spy.Banker.AX trojan

**Emsisoft** Trojan.Generic.20466258 (B)

**Ikarus** Trojan-Spy.Win64.Agent

**K7** Spyware ( 00504e561 )

**Lavasoft** Trojan.Generic.20466258

**McAfee** Trojan-FLEP!889E320CF665

**Microsoft Security Essentials** TrojanSpy:Win64/Cyruslish.A

**NANOAV** Trojan.Win64.Alreay.elwnmb

**Sophos** Troj/Banker-GSY


-----

**Symantec** Trojan.Gen.2

**TrendMicro** BKDR64_.D1FB2862

**TrendMicro House Call** BKDR64_.D1FB2862

**VirusBlokAda** TrojanBanker.Alreay

**Zillya!** Trojan.Banker.Win64.148

YARA Rules

rule CISA_3P_10301706_02 : HiddenCobra TWOPENCE backdoor dropper proxy spyware trojan

{
meta:
Author = "CISA Trusted Third Party"

Incident = "10301706.r2.v1"

Date = "2020-08-11"

Actor = "Hidden Cobra"

Category = "Backdoor Dropper Proxy Spyware Trojan"

Family = "TWOPENCE"

Description = "Detects strings in TWOPENCE proxy tool"

MD5_1 = "40e698f961eb796728a57ddf81f52b9a"

SHA256_1 = "a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118"

MD5_2 = "dfd09e91b7f86a984f8687ed6033af9d"

SHA256_2 = "aca598e2c619424077ef8043cb4284729045d296ce95414c83ed70985c892c83"

MD5_3 = "bda82f0d9e2cb7996d2eefdd1e5b41c4"

SHA256_3 = "f3ca8f15ca582dd486bd78fd57c2f4d7b958163542561606bebd250c827022de"

MD5_4 = "97aaf130cfa251e5207ea74b2558293d"

SHA256_4 = "9a776b895e93926e2a758c09e341accb9333edc1243d216a5e53f47c6043c852"

MD5_5 = "889e320cf66520485e1a0475107d7419"

SHA256_5 = "8cad61422d032119219f465331308c5a61e21c9a3a431b88e1f8b25129b7e2a1"

strings:

$cmd1 = "ssylka"

$cmd2 = "ustanavlivat"

$cmd3 = "poluchit"

$cmd4 = "pereslat"

$cmd5 = "derzhat"

$cmd6 = "vykhodit"

$cmd7 = "Nachalo"

$cmd8 = "kliyent2podklyuchit"

$frmt1 = "Host: %s%s%s:%hu"

$frmt2 = "%s%s%s%s%s%s%s%s%s%s"

condition:

(4 of ($cmd*)) and (1 of ($frmt*))

}

ssdeep Matches

No matches found.

PE Metadata

**Compile Date** 2016-08-26 00:11:49-04:00

**Import Hash** 1cd9192feb9402723bdada868b8c98de

PE Sections

**MD5** **Name** **Raw Size** **Entropy**

2fb3e4c0734998f9629ba86c4e7c6e99 header 1024 2.603055

9319545c7ac53b81b3d56a722dad8ef1 .text 364032 6.423307

e406c9d4f3bdbdbab8191bb701e4ff57 .rdata 81920 6.056842

6198d24ba115f17c5597e2773cb51a75 .data 8704 3.090138

f7b6096db3b9ad55c3bad4c47de6d5b4 .pdata 22016 5.758547


-----

ddf5f86578d6de91c211211bdd72f63f .reloc 3072 3.181451

Description

This file is a 32-bit Windows executable. It has similar functionality as
a917c1cc198cf36c0f2f6c24652e5c2e94e28d963b128d54f00144d216b2d118.

## Mitigation

The following Snort rules were provided by a CISA trusted third party:

// The following Snort rule can be used to detect proxy handshake

alert tcp any any -> any any (msg:"Proxy handshake detected"; content:"|a7 00 a7 00 fb 00 b0 00 8e 00 c5 00 b0 00 48 00 17 00 c5 00 8b 00
6a 00 8e 00 ec 00 f3 00 fe 00 d9 00 f3 00 a7 00 6a 00 ec 00 a7 00 b0 00 17 00 fc 00 48 00 48 00 09 00 09 00 09 00 48 00 8e 00 ce|"; rev:1;
sid:1;)

// The following Snort rule can be used to detect encrypted proxy string kliyent2podklyuchit

alert tcp any any -> any any (msg:"Proxy string detected"; content:"|d1 14 23 b3 c7 b2 ac fe 70 0d 1c d1 14 b3 d7 f9 38 23 ac|"; rev:1; sid:1;)

// The following Snort rule can be used to detect encrypted proxy string poluchit

alert tcp any any -> any any (msg:"Proxy string detected"; content:"|70 0d 14 d7 f9 38 23 ac|"; rev:1; sid:1;)

// The following Snort rule can be used to detect encrypted proxy string pereslat

alert tcp any any -> any any (msg:"Proxy string detected"; content:"|70 c7 be c7 c9 14 ab ac|"; rev:1; sid:1;)

## Recommendations

CISA recommends that users and administrators consider using the following best practices to strengthen the security posture of their
organization's systems. Any configuration changes should be reviewed by system owners and administrators prior to implementation to avoid
unwanted impacts.

Maintain up-to-date antivirus signatures and engines.
Keep operating system patches up-to-date.
Disable File and Printer sharing services. If these services are required, use strong passwords or Active Directory authentication.
Restrict users' ability (permissions) to install and run unwanted software applications. Do not add users to the local administrators group
unless required.
Enforce a strong password policy and implement regular password changes.
Exercise caution when opening e-mail attachments even if the attachment is expected and the sender appears to be known.
Enable a personal firewall on agency workstations, configured to deny unsolicited connection requests.
Disable unnecessary services on agency workstations and servers.
Scan for and remove suspicious e-mail attachments; ensure the scanned attachment is its "true file type" (i.e., the extension matches the
file header).
Monitor users' web browsing habits; restrict access to sites with unfavorable content.
Exercise caution when using removable media (e.g., USB thumb drives, external drives, CDs, etc.).
Scan all software downloaded from the Internet prior to executing.
Maintain situational awareness of the latest threats and implement appropriate Access Control Lists (ACLs).

Additional information on malware incident prevention and handling can be found in National Institute of Standards and Technology (NIST)
Special Publication 800-83, "Guide to Malware Incident Prevention & Handling for Desktops and Laptops".

## Contact Information

CISA continuously strives to improve its products and services. You can help by answering a very short series of questions about this product
[at the following URL: https://www.cisa.gov/forms/feedback/](https://www.cisa.gov/forms/feedback/)

## Document FAQ

**What is a MIFR? A Malware Initial Findings Report (MIFR) is intended to provide organizations with malware analysis in a timely manner. In**
most instances this report will provide initial indicators for computer and network defense. To request additional analysis, please contact CISA
and provide information regarding the level of desired analysis.

**What is a MAR? A Malware Analysis Report (MAR) is intended to provide organizations with more detailed malware analysis acquired via**
manual reverse engineering. To request additional analysis, please contact CISA and provide information regarding the level of desired
analysis.

**Can I edit this document? This document is not to be edited in any way by recipients. All comments or questions related to this document**
[should be directed to the CISA at 1-888-282-0870 or CISA Service Desk.](http://10.10.0.46/mailto:CISAservicedesk@cisa.dhs.gov)


-----

**Ca** **sub** **t** **a** **a e to C S** a a e sa p es ca be sub tted a t ee et ods

Web: [https://malware.us-cert.gov](https://malware.us-cert.gov/)
E-Mail: [submit@malware.us-cert.gov](http://10.10.0.46/mailto:submit@malware.us-cert.gov)
FTP: ftp.malware.us-cert.gov (anonymous)

CISA encourages you to report any suspicious activity, including cybersecurity incidents, possible malicious code, software vulnerabilities, and
[phishing-related scams. Reporting forms can be found on CISA's homepage at www.cisa.gov.](http://www.cisa.gov/)


-----