IMPLANT_1_v5

rule IMPLANT_1_v5 {
   meta:
      description = "Downrage 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 = "ac1c6175-3a8b-524b-bb18-243c52f7dba1"
   strings:
      $drivername = { 6A 30 ?? 6A 33 [5] 6A 37 [5] 6A 32 [5] 6A 31 [5] 6A 77
         [5] 6A 69 [5] 6A 6E [5] 6A 2E [5] 6A 73 [5-9] 6A 79 [5] 6A 73 }
      $mutexname = { C7 45 ?? 2F 2F 64 66 C7 45 ?? 63 30 31 65 C7 45 ?? 6C 6C
         36 7A C7 45 ?? 73 71 33 2D C7 45 ?? 75 66 68 68 66 C7 45 ?? 66 }
   condition:
      (uint16(0) == 0x5A4D or uint16(0) == 0xCFD0 or uint16(0) == 0xC3D4 or
      uint32(0) == 0x46445025 or uint32(1) == 0x6674725C) and any of them
}