YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Loader_Win64_PGF_2

base dlls: /lib/payload/techniques/dllmain/

APT / threat actorMandiant red team tool countermeasuresBSD 2-Clause LicenseCompiles with YARA-X

Author: FireEye
Date: 2020-11-25
Modified: 2020-12-09
Score / Quality: 75 / 75

What this rule detects

base dlls: /lib/payload/techniques/dllmain/

Targets: Windows PE.

It defines 3 patterns (0 text, 3 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-loader-win64-pgf-2.yarBSD 2-Clause License

rule FIREEYE_RT_APT_Loader_Win64_PGF_2 : FILE
{
	meta:
		description = "base dlls: /lib/payload/techniques/dllmain/"
		author = "FireEye"
		id = "5253cb2a-28fd-57ab-be3d-f11cf2ea24cf"
		date = "2020-11-25"
		date = "2020-11-25"
		modified = "2020-12-09"
		reference = "https://github.com/mandiant/red_team_tool_countermeasures/"
		source_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/rules/PGF/production/yara/APT_Loader_Win64_PGF_2.yar#L4-L19"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "4326a7e863928ffbb5f6bdf63bb9126e"
		logic_hash = "074f6d9ad78ecd4dd8e3d0b5c8b0f61a48374f3935b85c4222305b207b447ec7"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 2

	strings:
		$sb1 = { B9 [4] FF 15 [4-32] 8B ?? 1C [0-16] 0F B? ?? 04 [0-64] F3 0F 6F 00 [0-64] 66 0F EF C8 [0-64] F3 0F 7F 08 [0-64] 30 ?? 48 8D 40 01 48 83 ?? 01 7? }
		$sb2 = { 44 8B ?? 08 [0-32] 41 B8 00 30 00 00 [0-16] FF 15 [4-32] 48 8B C8 [0-16] E8 [4-64] 4D 8D 49 01 [0-32] C1 ?? 04 [0-64] 0F B? [2-16] 41 30 ?? FF 45 3? ?? 7? }
		$sb3 = { 63 ?? 3C [0-16] 03 [1-32] 0F B? ?? 14 [0-16] 8D ?? 18 [0-16] 03 [1-16] 66 ?? 3B ?? 06 7? [1-64] 48 8D 15 [4-32] FF 15 [4-16] 85 C0 [2-32] 41 0F B? ?? 06 }

	condition:
		( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x020B ) and all of them
}

Strings (3 patterns)

Identifier	Type	Value
$sb1	hex	{ B9 [4] FF 15 [4-32] 8B ?? 1C [0-16] 0F B? ?? 04 [0-64] F3 0F 6F 00 [0-64] 66 0F EF C8 [0-64] F3 0F 7F 08 [0-64] 30 ?? 48 8D 40 01 48 83 ?? 01 7? }
$sb2	hex	{ 44 8B ?? 08 [0-32] 41 B8 00 30 00 00 [0-16] FF 15 [4-32] 48 8B C8 [0-16] E8 [4-64] 4D 8D 49 01 [0-32] C1 ?? 04 [0-64] 0F B? [2-16] 41 30 ?? FF 45 3? ?? 7? }
$sb3	hex	{ 63 ?? 3C [0-16] 03 [1-32] 0F B? ?? 14 [0-16] 8D ?? 18 [0-16] 03 [1-16] 66 ?? 3B ?? 06 7? [1-64] 48 8D 15 [4-32] FF 15 [4-16] 85 C0 [2-32] 41 0F B? ?? 06 }

Condition

( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x020B ) and all of them

In plain words (Heuristic)

The file must start with “MZ” — a Windows executable (PE).
All patterns in the rule must match.

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References

https://github.com/mandiant/red_team_tool_countermeasures/

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

4326a7e863928ffbb5f6bdf63bb9126e

Licence & attribution

Author: FireEye

Source repository: Mandiant red team tool countermeasures @ 3561b71724

Licence: BSD 2-Clause License (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 5253cb2a-28fd-57ab-be3d-f11cf2ea24cf

Metadata

rev	2

Tags:FILE

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