APT_MAL_VEILEDSIGNAL_Backdoor_Apr23_4


Description

Detects malicious VEILEDSIGNAL backdoor

Query · yara

strings:
      $op1 = { 48 8D 15 ?? ?? ?? ?? 48 8D 4C 24 ?? E8 ?? ?? ?? ?? 85 C0 74 ?? 48 8D 15 ?? ?? ?? ?? 48 8D 4C 24 ?? E8 ?? ?? ?? ?? 85 C0 74 ?? 48 8D 15 ?? ?? ?? ?? 48 8D 4C 24 ?? E8 ?? ?? ?? ?? 85 C0 } /* check for certian process */
		$op2 = { 48 8B C8 48 8D 15 ?? ?? ?? ?? FF 15 ?? ?? ?? ?? 45 33 C0 4C 8D 4D ?? B2 01 41 8D 48 ?? FF D0} /* RtlAdjustPrivilege */
      $op3 = { 33 FF C7 44 24 ?? 38 02 00 00 33 D2 8D 4F ?? FF 15 ?? ?? ?? ?? 48 8B D8 48 83 F8 FF 74 ?? 48 8D 54 24 ?? 48 8B C8 FF 15 } /* Process32FirstW */
      $op4 = { 4C 8D 05 ?? ?? ?? ?? 48 89 4C 24 ?? 4C 8B C8 33 D2 89 4C 24 ?? FF 15 } /* create thread*/
   condition:
      all of them
Raw source APT_MAL_VEILEDSIGNAL_Backdoor_Apr23_4 · YARA
Esc
Published by Neo23x0/signature-base ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified.
rule APT_MAL_VEILEDSIGNAL_Backdoor_Apr23_4 {
   meta:
      description = "Detects malicious VEILEDSIGNAL backdoor"
      author = "X__Junior"
      reference = "https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/xtrader-3cx-supply-chain"
      date = "2023-04-29"
      hash = "9b0761f81afb102bb784b398b16faa965594e469a7fcfdfd553ced19cc17e70b"
      score = 80
      id = "77340ec0-36bb-5c47-995f-4e6f76b68fe1"
   strings:
      $op1 = { 48 8D 15 ?? ?? ?? ?? 48 8D 4C 24 ?? E8 ?? ?? ?? ?? 85 C0 74 ?? 48 8D 15 ?? ?? ?? ?? 48 8D 4C 24 ?? E8 ?? ?? ?? ?? 85 C0 74 ?? 48 8D 15 ?? ?? ?? ?? 48 8D 4C 24 ?? E8 ?? ?? ?? ?? 85 C0 } /* check for certian process */
		$op2 = { 48 8B C8 48 8D 15 ?? ?? ?? ?? FF 15 ?? ?? ?? ?? 45 33 C0 4C 8D 4D ?? B2 01 41 8D 48 ?? FF D0} /* RtlAdjustPrivilege */
      $op3 = { 33 FF C7 44 24 ?? 38 02 00 00 33 D2 8D 4F ?? FF 15 ?? ?? ?? ?? 48 8B D8 48 83 F8 FF 74 ?? 48 8D 54 24 ?? 48 8B C8 FF 15 } /* Process32FirstW */
      $op4 = { 4C 8D 05 ?? ?? ?? ?? 48 89 4C 24 ?? 4C 8B C8 33 D2 89 4C 24 ?? FF 15 } /* create thread*/
   condition:
      all of them
}

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