APT_APT28_Win_FreshFire


Description

The FRESHFIRE malware family. The malware acts as a downloader, pulling down an encrypted snippet of code from a remote source, executing it, and deleting it from the remote server.

Query · yara

strings:
      $uniq1 = "UlswcXJJWhtHIHrVqWJJ"
      $uniq2 = "gyibvmt\x00"

      $path1 = "root/time/%d/%s.json"
      $path2 = "C:\\dell.sdr"
      $path3 = "root/data/%d/%s.json"
   condition:
      (
         pe.number_of_exports == 1 and pe.exports("WaitPrompt")
      ) or
      any of ($uniq*) or
      2 of ($path*)
Raw source APT_APT28_Win_FreshFire · YARA
Esc
Published by Neo23x0/signature-base ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified.
rule APT_APT28_Win_FreshFire : APT29 {
   meta:
      author = "threatintel@volexity.com"
      date = "2021-05-27"
      description = "The FRESHFIRE malware family. The malware acts as a downloader, pulling down an encrypted snippet of code from a remote source, executing it, and deleting it from the remote server."
      hash = "ad67aaa50fd60d02f1378b4155f69cffa9591eaeb80523489a2355512cc30e8c"
      reference = "https://www.volexity.com/blog/2021/05/27/suspected-apt29-operation-launches-election-fraud-themed-phishing-campaigns/"
      id = "050b8e61-139a-5ff5-998a-7de67c9975bf"
   strings:
      $uniq1 = "UlswcXJJWhtHIHrVqWJJ"
      $uniq2 = "gyibvmt\x00"

      $path1 = "root/time/%d/%s.json"
      $path2 = "C:\\dell.sdr"
      $path3 = "root/data/%d/%s.json"
   condition:
      (
         pe.number_of_exports == 1 and pe.exports("WaitPrompt")
      ) or
      any of ($uniq*) or
      2 of ($path*)
}

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