APT_MAL_LNX_RedMenshen_BPFDoor_Controller_Generic_May22_1

YARA detection rule by Florian Roth · NOASSERTION

Detects BPFDoor malware

rule APT_MAL_LNX_RedMenshen_BPFDoor_Controller_Generic_May22_1 {
   meta:
      description = "Detects BPFDoor malware"
      author = "Florian Roth"
      reference = "https://doublepulsar.com/bpfdoor-an-active-chinese-global-surveillance-tool-54b078f1a896"
      date = "2022-05-09"
      score = 90
      hash1 = "07ecb1f2d9ffbd20a46cd36cd06b022db3cc8e45b1ecab62cd11f9ca7a26ab6d"
      hash2 = "1925e3cd8a1b0bba0d297830636cdb9ebf002698c8fa71e0063581204f4e8345"
      hash3 = "4c5cf8f977fc7c368a8e095700a44be36c8332462c0b1e41bff03238b2bf2a2d"
      hash4 = "591198c234416c6ccbcea6967963ca2ca0f17050be7eed1602198308d9127c78"
      hash5 = "599ae527f10ddb4625687748b7d3734ee51673b664f2e5d0346e64f85e185683"
      hash6 = "5b2a079690efb5f4e0944353dd883303ffd6bab4aad1f0c88b49a76ddcb28ee9"
      hash7 = "5faab159397964e630c4156f8852bcc6ee46df1cdd8be2a8d3f3d8e5980f3bb3"
      hash8 = "76bf736b25d5c9aaf6a84edd4e615796fffc338a893b49c120c0b4941ce37925"
      hash9 = "93f4262fce8c6b4f8e239c35a0679fbbbb722141b95a5f2af53a2bcafe4edd1c"
      hash10 = "96e906128095dead57fdc9ce8688bb889166b67c9a1b8fdb93d7cff7f3836bb9"
      hash11 = "97a546c7d08ad34dfab74c9c8a96986c54768c592a8dae521ddcf612a84fb8cc"
      hash12 = "c796fc66b655f6107eacbe78a37f0e8a2926f01fecebd9e68a66f0e261f91276"
      hash13 = "c80bd1c4a796b4d3944a097e96f384c85687daeedcdcf05cc885c8c9b279b09c"
      hash14 = "f47de978da1dbfc5e0f195745e3368d3ceef034e964817c66ba01396a1953d72"
      hash15 = "f8a5e735d6e79eb587954a371515a82a15883cf2eda9d7ddb8938b86e714ea27"
      hash16 = "fa0defdabd9fd43fe2ef1ec33574ea1af1290bd3d763fdb2bed443f2bd996d73"
      hash17 = "fd1b20ee5bd429046d3c04e9c675c41e9095bea70e0329bd32d7edd17ebaf68a"
   strings:
      $op1 = { c6 80 01 01 00 00 00 48 8b 45 ?8 0f b6 90 01 01 00 00 48 8b 45 ?8 88 90 00 01 00 00 c6 45 ?? 00 0f b6 45 ?? 88 45 }
      $op2 = { 48 89 55 c8 48 8b 45 c8 48 89 45 ?? 48 8b 45 c8 0f b6 80 00 01 00 00 88 45 f? 48 8b 45 c8 0f b6 80 01 01 00 00 }
      $op3 = { 48 89 45 ?? 48 8b 45 c8 0f b6 80 00 01 00 00 88 45 f? 48 8b 45 c8 0f b6 80 01 01 00 00 88 45 f? c7 45 f8 00 00 00 00 }
      $op4 = { 48 89 7d d8 89 75 d4 48 89 55 c8 48 8b 45 c8 48 89 45 ?? 48 8b 45 c8 0f b6 80 00 01 00 00 88 45 f? }
      $op5 = { 48 8b 45 ?8 c6 80 01 01 00 00 00 48 8b 45 ?8 0f b6 90 01 01 00 00 48 8b 45 ?8 88 90 00 01 00 00 c6 45 ?? 00 0f b6 45 }
      $op6 = { 89 75 d4 48 89 55 c8 48 8b 45 c8 48 89 45 ?? 48 8b 45 c8 0f b6 80 00 01 00 00 88 45 f? 48 8b 45 c8 }
   condition:
      uint16(0) == 0x457f and
      filesize < 200KB and 2 of them or 4 of them
}

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

737c6fe4-2521-4561-92ff-44a10f7f4722

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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

[[ reason ]]

What does this mean?

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.

[[ reason ]]

What do these messages mean?

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

[[ currentRule.title ]]

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