APT_Loader_Win64_MATRYOSHKA_2

rule APT_Loader_Win64_MATRYOSHKA_2
{
    meta:
        date = "2020-12-02"
        modified = "2020-12-02"
        description = "matryoshka.rs"
        md5 = "7f8102b789303b7861a03290c79feba0"
        reference = "https://www.fireeye.com/blog/products-and-services/2020/12/fireeye-shares-details-of-recent-cyber-attack-actions-to-protect-community.html"
        author = "FireEye"
        id = "25f916bc-6ee1-5175-903c-4266b0a086e1"
    strings:
        $sb1 = { 4D [2] 00 49 [2] 08 B? 02 00 00 00 31 ?? E8 [4] 48 89 ?? 48 89 ?? 4C 89 ?? 49 89 ?? E8 [4] 4C 89 ?? 48 89 ?? E8 [4] 83 [2] 01 0F 84 [4] 48 89 ?? 48 8B [2] 48 8B [2] 48 89 [5] 48 89 [5] 48 89 [5] 41 B? [4] 4C 89 ?? 31 ?? E8 [4] C7 45 [5] 48 89 ?? 4C 89 ?? E8 [4] 85 C0 }
        $sb2 = { 4C [2] 0F 83 [4] 41 0F [3] 01 41 32 [2] 00 48 8B [5] 48 3B [5] 75 ?? 41 B? 01 00 00 00 4C 89 ?? E8 [4] E9 }
        $si1 = "CreateToolhelp32Snapshot" fullword
        $si2 = "Process32Next" fullword
    condition:
        (uint16(0) == 0x5A4D) and (uint32(uint32(0x3C)) == 0x00004550) and (uint16(uint32(0x3C)+0x18) == 0x020B) and all of them
}