APT_Loader_MSIL_TRIMBISHOP_1

Description

APT_Loader_MSIL_TRIMBISHOP_1

Query · yara

strings:
        $sb1 = { 28 [2] 00 06 0A 06 7B [2] 00 04 [12-64] 06 7B [2] 00 04 6E 28 [2] 00 06 0B 07 7B [2] 00 04 [12-64] 0? 7B [2] 00 04 0? 7B [2] 00 04 0? 7B [2] 00 04 6E 28 [2] 00 06 0? 0? 7B [2] 00 04 [12-80] 0? 7B [2] 00 04 1? 0? 7B [2] 00 04 }
        $sb2 = { 0F ?? 7C [2] 00 04 28 [2] 00 0A 8C [2] 00 01 [20-80] 28 [2] 00 06 0? 0? 7E [2] 00 0A 28 [2] 00 0A [12-80] 7E [2] 00 0A 13 ?? 0? 7B [2] 00 04 28 [2] 00 0A 0? 28 [2] 00 0A 58 28 [2] 00 0A 13 [1-32] 28 [2] 00 0A [0-32] D0 [2] 00 02 28 [2] 00 0A 28 [2] 00 0A 74 [2] 00 02 }
        $ss1 = "\x00NtMapViewOfSection\x00"
        $ss2 = "\x00NtOpenProcess\x00"
        $ss3 = "\x00NtAlertResumeThread\x00"
        $ss4 = "\x00LdrGetProcedureAddress\x00"
        $tb1 = "\x00DTrim.Execution.DynamicInvoke\x00"
    condition:
        (uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and (@sb1[1] < @sb2[1]) and (all of ($ss*)) and (all of ($tb*))
Raw source APT_Loader_MSIL_TRIMBISHOP_1 · YARA
Esc
Published by Neo23x0/signature-base ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
rule APT_Loader_MSIL_TRIMBISHOP_1
{
    meta:
        date = "2020-12-03"
        modified = "2020-12-03"
        md5 = "e91670423930cbbd3dbf5eac1f1a7cb6"
        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 = "1a3f4247-25f4-51ca-b881-209c0753b915"
    strings:
        $sb1 = { 28 [2] 00 06 0A 06 7B [2] 00 04 [12-64] 06 7B [2] 00 04 6E 28 [2] 00 06 0B 07 7B [2] 00 04 [12-64] 0? 7B [2] 00 04 0? 7B [2] 00 04 0? 7B [2] 00 04 6E 28 [2] 00 06 0? 0? 7B [2] 00 04 [12-80] 0? 7B [2] 00 04 1? 0? 7B [2] 00 04 }
        $sb2 = { 0F ?? 7C [2] 00 04 28 [2] 00 0A 8C [2] 00 01 [20-80] 28 [2] 00 06 0? 0? 7E [2] 00 0A 28 [2] 00 0A [12-80] 7E [2] 00 0A 13 ?? 0? 7B [2] 00 04 28 [2] 00 0A 0? 28 [2] 00 0A 58 28 [2] 00 0A 13 [1-32] 28 [2] 00 0A [0-32] D0 [2] 00 02 28 [2] 00 0A 28 [2] 00 0A 74 [2] 00 02 }
        $ss1 = "\x00NtMapViewOfSection\x00"
        $ss2 = "\x00NtOpenProcess\x00"
        $ss3 = "\x00NtAlertResumeThread\x00"
        $ss4 = "\x00LdrGetProcedureAddress\x00"
        $tb1 = "\x00DTrim.Execution.DynamicInvoke\x00"
    condition:
        (uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and (@sb1[1] < @sb2[1]) and (all of ($ss*)) and (all of ($tb*))
}

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