Threat Group Cards: A Threat Actor Encyclopedia
Archived: 2026-04-05 20:19:07 UTC
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 Tool: PyFlash
Names PyFlash
Category Malware
Type Backdoor
Description
(ESET) This second stage backdoor is a py2exe executable. py2exe is a Python extension
to convert a Python script into a standalone Windows executable. To our knowledge, this
is the first time the Turla developers have used the Python language in a backdoor.
The backdoor communicates with its hardcoded C&C server via HTTP. The C&C URL
and other parameters such as the AES key and IV used to encrypt all network
communications are specified at the beginning of the script.
The C&C server can also send backdoor commands in JSON format. The commands
implemented in this version of PyFlash are:
• Download additional files from a given HTTP(S) link.
• Execute a Windows command using the Python function subprocess32.Popen.
• Change the execution delay: modifies the Windows task that regularly (every X minutes;
5 by default) launches the malware.
• Kill (uninstall) the malware.
Information
AlienVault OTX Last change to this tool card: 20 April 2020
Download this tool card in JSON format
All groups using tool PyFlash
Changed Name Country Observed
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=c48d96e8-d9ad-4bfa-beb4-ba44b70c77cd
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APT groups
  Turla, Waterbug, Venomous Bear 1996-2024  
1 group listed (1 APT, 0 other, 0 unknown)
Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=c48d96e8-d9ad-4bfa-beb4-ba44b70c77cd
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=c48d96e8-d9ad-4bfa-beb4-ba44b70c77cd
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