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Detects a config text file used in data exfiltration in RUAG case

yara HIGH Yara-Rules
backdoorcommunity
This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at Yara-Rules →
Retrieved: 2026-06-05T11:00:00Z · Confidence: medium

Hunt Hypothesis

A threat actor may be using a configuration text file to establish a data exfiltration mechanism in a RUAG-related attack, leveraging file-based communication for command and control. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate potential data exfiltration channels early in the attack lifecycle.

YARA Rule

rule RUAG_Exfil_Config_File 
{

  meta:
    description = "Detects a config text file used in data exfiltration in RUAG case"
    author = "Florian Roth"
    reference = "https://goo.gl/N5MEj0"
    score = 60

  strings:
    $h1 = "[TRANSPORT]" ascii
    $s1 = "system_pipe" ascii
    $s2 = "spstatus" ascii
    $s3 = "adaptable" ascii 
    $s4 = "post_frag" ascii
    $s5 = "pfsgrowperiod" ascii
  
  condition:
    $h1 at 0 and all of ($s*) and filesize < 1KB
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 6 string patterns in its detection logic.

References

False Positive Guidance

Original source: https://github.com/Yara-Rules/rules/blob/main/malware/APT_Turla_RUAG.yar