Threat Group Cards: A Threat Actor Encyclopedia
Archived: 2026-04-05 15:01:32 UTC
Home > List all groups > List all tools > List all groups using tool FlawedGrace
 Tool: FlawedGrace
Names
FlawedGrace
GraceWire
Category Malware
Type Backdoor, Downloader
Description (Proofpoint) FlawedGrace is a remote access trojan (RAT) named after debugging
artifacts (class names) left in the analyzed sample.
The malware is written in C++. It is a very large program and makes extensive use of
object-oriented and multithreaded programming techniques. This makes reverse
engineering and debugging the malware both difficult and time consuming. The coding
style and techniques suggest that FlawedGrace was not written by the same developer as
ServHelper.
FlawedGrace uses a complicated binary protocol for its command and control. It can use
a configurable port for communications, but all samples we have observed to date have
used port 443. Figure 8 shows an example of the first four messages between an infected
system and C&C server.
FlawedGrace also uses a series of commands, provided below for reference:
• target_remove
• target_update
• target_reboot
• target_module_load
• target_module_load_external
• target_module_unload
• target_download
• target_upload
• target_rdp
• target_passwords
• target_servers
• target_script
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=2e3f838e-197c-412f-a98d-4b3ad248baa6
Page 1 of 2

• destroy_os
• desktop_stat
Information
MITRE ATT&CK Malpedia Last change to this tool card: 13 May 2020
Download this tool card in JSON format
All groups using tool FlawedGrace
Changed Name Country Observed
APT groups
 TA505, Graceful Spider, Gold Evergreen 2006-Nov 2022
1 group listed (1 APT, 0 other, 0 unknown)
Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=2e3f838e-197c-412f-a98d-4b3ad248baa6
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=2e3f838e-197c-412f-a98d-4b3ad248baa6
Page 2 of 2