IMPLANT_2_v16

rule IMPLANT_2_v16 {
   meta:
      description = "CORESHELL/SOURFACE Implant by APT28"
      author = "US CERT"
      reference = "https://www.us-cert.gov/ncas/current-activity/2017/02/10/Enhanced-Analysis-GRIZZLY-STEPPE"
      date = "2017-02-10"
      score = 85
      id = "2c54a749-c80b-5010-97b6-b74c54fd3d07"
   strings:
      $OBF_FUNCT = { 0F B6 1C 0B 8D 34 08 8D 04 0A 0F AF D8 33 D2 8D 41 FF F7
         75 F8 8B 45 0C C1 EB 07 8D 79 01 32 1C 02 33 D2 8B C7 89 5D E4 BB 06
         00 00 00 F7 F3 8B 45 0C 8D 59 FE 02 5D FF 32 1C 02 8B C1 33 D2 B9 06
         00 00 00 F7 F1 8B 45 0C 8B CF 22 1C 02 8B 45 E4 8B 55 E0 02 C3 30 06
         8B 5D F0 8D 41 FE 83 F8 06 8B 45 DC 72 9A }
   condition:
      (uint16(0) == 0x5A4D or uint16(0) == 0xCFD0 or uint16(0) == 0xC3D4 or
      uint32(0) == 0x46445025 or uint32(1) == 0x6674725C) and $OBF_FUNCT
}