APT28_SourFace_Malware2_RID2F31

YARA detection rule by Florian Roth · CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/

Detects Malware from APT28 incident - SOURFACE is a downloader that obtains a second-stage backdoor from a C2 server.

rule APT28_SourFace_Malware2_RID2F31 : APT DEMO EXE FILE G0007 RUSSIA {
   meta:
      description = "Detects Malware from APT28 incident - SOURFACE is a downloader that obtains a second-stage backdoor from a C2 server."
      author = "Florian Roth"
      reference = "https://www.fireeye.com/blog/threat-research/2014/10/apt28-a-window-into-russias-cyber-espionage-operations.html"
      date = "2015-06-01 11:46:41"
      score = 60
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      hash1 = "cf3220c867b81949d1ce2b36446642de7894c6dc"
      hash2 = "ed48ef531d96e8c7360701da1c57e2ff13f12405"
      hash3 = "682e49efa6d2549147a21993d64291bfa40d815a"
      tags = "APT, DEMO, EXE, FILE, G0007, RUSSIA"
      minimum_yara = "3.5.0"
      
   strings:
      $s0 = "coreshell.dll" fullword ascii
      $s1 = "Applicate" fullword ascii
   condition: 
      uint16 ( 0 ) == 0x5a4d and filesize < 550KB and all of them
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

4c391a5c-c767-4cc2-a960-d1720a38cb40

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

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[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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