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YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Loader_Win32_PGF_5

PGF payload, generated rule based on symfunc/a86b004b5005c0bcdbd48177b5bac7b8

APT / threat actorMandiant red team tool countermeasuresBSD 2-Clause LicenseCompiles with YARA-X
Author
FireEye
Date
2020-12-08
Modified
2020-12-09
Score / Quality
75 / 75

What this rule detects

PGF payload, generated rule based on symfunc/a86b004b5005c0bcdbd48177b5bac7b8

Targets: Windows PE.

It defines 4 patterns (0 text, 4 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-loader-win32-pgf-5.yarBSD 2-Clause License
rule FIREEYE_RT_APT_Loader_Win32_PGF_5 : FILE
{
	meta:
		description = "PGF payload, generated rule based on symfunc/a86b004b5005c0bcdbd48177b5bac7b8"
		author = "FireEye"
		id = "376875f3-00f2-58d0-ae22-7f52ea566da2"
		date = "2020-12-08"
		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_Win32_PGF_5.yar#L4-L18"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "8c91a27bbdbe9fb0877daccd28bd7bb5"
		logic_hash = "dfff615a1d329cf181294f7b0a32c11a21d66ff8a6aa6b9fcd183c9738369623"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 3

	strings:
		$cond1 = { 8B FF 55 8B EC 81 EC 30 01 00 00 A1 00 30 00 10 33 C5 89 45 E0 56 C7 45 F8 00 00 00 00 C6 85 D8 FE FF FF 00 68 03 01 00 00 6A 00 8D 85 D9 FE FF FF 50 E8 F9 07 00 00 83 C4 0C C7 45 F4 00 00 00 00 C6 45 E7 00 C7 45 E8 00 00 00 00 C7 45 EC 00 00 00 00 C7 45 FC 00 00 00 00 C7 45 F0 00 00 00 00 6A 01 6A 00 8D 8D D8 FE FF FF 51 6A 00 68 9C 10 00 10 8B 15 10 30 00 10 52 E8 31 01 00 00 89 45 F8 6A 14 FF 15 5C 10 00 10 83 C4 04 89 45 E8 8B 45 F8 8A 48 04 88 4D E7 8B 55 F8 83 C2 0C 8B 45 E8 8B 0A 89 08 8B 4A 04 89 48 04 8B 4A 08 89 48 08 8B 4A 0C 89 48 0C 8B 52 10 89 50 10 C7 85 D4 FE FF FF 00 00 00 00 EB 0F 8B 85 D4 FE FF FF 83 C0 01 89 85 D4 FE FF FF 83 BD D4 FE FF FF 14 7D 1F 8B 4D E8 03 8D D4 FE FF FF 0F B6 11 0F B6 45 E7 33 D0 8B 4D E8 03 8D D4 FE FF FF 88 11 EB C9 8B 55 F8 8B 42 08 89 45 FC 6A 40 68 00 30 00 00 8B 4D FC 51 6A 00 FF 15 00 10 00 10 89 45 EC 8B 55 FC 52 8B 45 F8 83 C0 20 50 8B 4D EC 51 E8 F0 06 00 00 83 C4 0C C7 85 D0 FE FF FF 00 00 00 00 EB 0F 8B 95 D0 FE FF FF 83 C2 01 89 95 D0 FE FF FF 8B 85 D0 FE FF FF 3B 45 FC 73 30 8B 4D EC 03 8D D0 FE FF FF 0F B6 09 8B 85 D0 FE FF FF 99 BE 14 00 00 00 F7 FE 8B 45 E8 0F B6 14 10 33 CA 8B 45 EC 03 85 D0 FE FF FF 88 08 EB B6 8B 4D EC 89 4D F0 FF 55 F0 5E 8B 4D E0 33 CD E8 6D 06 00 00 8B E5 5D C3 }
		$cond2 = { 8B FF 55 8B EC 81 EC 30 01 00 00 A1 00 30 00 10 33 C5 89 45 E0 56 C7 45 F8 00 00 00 00 C6 85 D8 FE FF FF 00 68 03 01 00 00 6A 00 8D 85 D9 FE FF FF 50 E8 F9 07 00 00 83 C4 0C C7 45 F4 00 00 00 00 C6 45 E7 00 C7 45 E8 00 00 00 00 C7 45 EC 00 00 00 00 C7 45 FC 00 00 00 00 C7 45 F0 00 00 00 00 6A 01 6A 00 8D 8D D8 FE FF FF 51 6A 00 68 9C 10 00 10 8B 15 20 33 00 10 52 E8 31 01 00 00 89 45 F8 6A 14 FF 15 58 10 00 10 83 C4 04 89 45 E8 8B 45 F8 8A 48 04 88 4D E7 8B 55 F8 83 C2 0C 8B 45 E8 8B 0A 89 08 8B 4A 04 89 48 04 8B 4A 08 89 48 08 8B 4A 0C 89 48 0C 8B 52 10 89 50 10 C7 85 D4 FE FF FF 00 00 00 00 EB 0F 8B 85 D4 FE FF FF 83 C0 01 89 85 D4 FE FF FF 83 BD D4 FE FF FF 14 7D 1F 8B 4D E8 03 8D D4 FE FF FF 0F B6 11 0F B6 45 E7 33 D0 8B 4D E8 03 8D D4 FE FF FF 88 11 EB C9 8B 55 F8 8B 42 08 89 45 FC 6A 40 68 00 30 00 00 8B 4D FC 51 6A 00 FF 15 2C 10 00 10 89 45 EC 8B 55 FC 52 8B 45 F8 83 C0 20 50 8B 4D EC 51 E8 F0 06 00 00 83 C4 0C C7 85 D0 FE FF FF 00 00 00 00 EB 0F 8B 95 D0 FE FF FF 83 C2 01 89 95 D0 FE FF FF 8B 85 D0 FE FF FF 3B 45 FC 73 30 8B 4D EC 03 8D D0 FE FF FF 0F B6 09 8B 85 D0 FE FF FF 99 BE 14 00 00 00 F7 FE 8B 45 E8 0F B6 14 10 33 CA 8B 45 EC 03 85 D0 FE FF FF 88 08 EB B6 8B 4D EC 89 4D F0 FF 55 F0 5E 8B 4D E0 33 CD E8 6D 06 00 00 8B E5 5D C3 }
		$cond3 = { 8B FF 55 8B EC 81 EC 30 01 00 00 A1 ?? ?? ?? ?? 33 C5 89 45 ?? 56 C7 45 ?? 00 00 00 00 C6 85 ?? ?? ?? ?? 00 68 03 01 00 00 6A 00 8D 85 ?? ?? ?? ?? 50 E8 ?? ?? ?? ?? 83 C4 0C C7 45 ?? 00 00 00 00 C6 45 ?? 00 C7 45 ?? 00 00 00 00 C7 45 ?? 00 00 00 00 C7 45 ?? 00 00 00 00 C7 45 ?? 00 00 00 00 6A 01 6A 00 8D 8D ?? ?? ?? ?? 51 6A 00 68 9C 10 00 10 8B 15 ?? ?? ?? ?? 52 E8 ?? ?? ?? ?? 89 45 ?? 6A 14 FF 15 ?? ?? ?? ?? 83 C4 04 89 45 ?? 8B 45 ?? 8A 48 ?? 88 4D ?? 8B 55 ?? 83 C2 0C 8B 45 ?? 8B 0A 89 08 8B 4A ?? 89 48 ?? 8B 4A ?? 89 48 ?? 8B 4A ?? 89 48 ?? 8B 52 ?? 89 50 ?? C7 85 ?? ?? ?? ?? 00 00 00 00 EB ?? 8B 85 ?? ?? ?? ?? 83 C0 01 89 85 ?? ?? ?? ?? 83 BD ?? ?? ?? ?? 14 7D ?? 8B 4D ?? 03 8D ?? ?? ?? ?? 0F B6 11 0F B6 45 ?? 33 D0 8B 4D ?? 03 8D ?? ?? ?? ?? 88 11 EB ?? 8B 55 ?? 8B 42 ?? 89 45 ?? 6A 40 68 00 30 00 00 8B 4D ?? 51 6A 00 FF 15 ?? ?? ?? ?? 89 45 ?? 8B 55 ?? 52 8B 45 ?? 83 C0 20 50 8B 4D ?? 51 E8 ?? ?? ?? ?? 83 C4 0C C7 85 ?? ?? ?? ?? 00 00 00 00 EB ?? 8B 95 ?? ?? ?? ?? 83 C2 01 89 95 ?? ?? ?? ?? 8B 85 ?? ?? ?? ?? 3B 45 ?? 73 ?? 8B 4D ?? 03 8D ?? ?? ?? ?? 0F B6 09 8B 85 ?? ?? ?? ?? 99 BE 14 00 00 00 F7 FE 8B 45 ?? 0F B6 14 10 33 CA 8B 45 ?? 03 85 ?? ?? ?? ?? 88 08 EB ?? 8B 4D ?? 89 4D ?? FF 55 ?? 5E 8B 4D ?? 33 CD E8 ?? ?? ?? ?? 8B E5 5D C3 }
		$cond4 = { 8B FF 55 8B EC 81 EC 3? ?1 ?? ?? A1 ?? ?? ?? ?? 33 C5 89 45 E0 56 C7 45 F8 ?? ?? ?? ?? C6 85 D8 FE FF FF ?? 68 ?? ?? ?? ?? 6A ?? 8D 85 D9 FE FF FF 50 E8 ?? ?? ?? ?? 83 C4 0C C7 45 F4 ?? ?? ?? ?? C6 45 E7 ?? C7 45 E8 ?? ?? ?? ?? C7 45 EC ?? ?? ?? ?? C7 45 FC ?? ?? ?? ?? C7 45 F? ?? ?? ?? ?0 6A ?? 6A ?? 8D 8D D8 FE FF FF 51 6A ?? 68 ?? ?? ?? ?? 8B ?? ?? ?? ?? ?? 52 E8 ?? ?? ?? ?? 89 45 F8 6A ?? FF ?? ?? ?? ?? ?? 83 C4 04 89 45 E8 8B 45 F8 8A 48 04 88 4D E7 8B 55 F8 83 ?? ?? 8B 45 E8 8B 0A 89 08 8B 4A 04 89 48 04 8B 4A 08 89 48 08 8B 4A 0C 89 48 0C 8B 52 10 89 50 10 C7 85 D4 FE FF FF ?? ?? ?? ?? EB ?? 8B 85 D4 FE FF FF 83 C? ?1 89 85 D4 FE FF FF 83 BD D4 FE FF FF 14 7D ?? 8B 4D E8 03 8D D4 FE FF FF 0F B6 11 0F B6 45 E7 33 D0 8B 4D E8 03 8D D4 FE FF FF 88 11 EB ?? 8B 55 F8 8B 42 08 89 45 FC 6A ?? 68 ?? ?? ?? ?? 8B 4D FC 51 6A ?? FF ?? ?? ?? ?? ?? 89 45 EC 8B 55 FC 52 8B 45 F8 83 ?? ?? 50 8B 4D EC 51 E8 ?? ?? ?? ?? 83 C4 0C C7 85 D0 FE FF FF ?? ?? ?? ?? EB ?? 8B 95 D0 FE FF FF 83 C2 01 89 95 D0 FE FF FF 8B 85 D0 FE FF FF 3B 45 FC 73 ?? 8B 4D EC 03 8D D0 FE FF FF 0F B6 09 8B 85 D0 FE FF FF 99 BE ?? ?? ?? ?? F7 FE 8B 45 E8 0F B6 14 10 33 CA 8B 45 EC 03 85 D0 FE FF FF 88 08 EB ?? 8B 4D EC 89 4D F0 FF ?? ?? 5E 8B 4D E0 33 CD E8 ?? ?? ?? ?? 8B E5 5D C3 }

	condition:
		( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x010B ) and any of them
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$cond1hex{ 8B FF 55 8B EC 81 EC 30 01 00 00 A1 00 30 00 10 33 C5 89 45 E0 56 C7 45 F8 00 00 00 00 C6 85 D8 FE FF FF 00 68 03 01 00 00 6A 00 8D 85 D9 FE FF FF 50 E8 F9 07 …
$cond2hex{ 8B FF 55 8B EC 81 EC 30 01 00 00 A1 00 30 00 10 33 C5 89 45 E0 56 C7 45 F8 00 00 00 00 C6 85 D8 FE FF FF 00 68 03 01 00 00 6A 00 8D 85 D9 FE FF FF 50 E8 F9 07 …
$cond3hex{ 8B FF 55 8B EC 81 EC 30 01 00 00 A1 ?? ?? ?? ?? 33 C5 89 45 ?? 56 C7 45 ?? 00 00 00 00 C6 85 ?? ?? ?? ?? 00 68 03 01 00 00 6A 00 8D 85 ?? ?? ?? ?? 50 E8 ?? ?? …
$cond4hex{ 8B FF 55 8B EC 81 EC 3? ?1 ?? ?? A1 ?? ?? ?? ?? 33 C5 89 45 E0 56 C7 45 F8 ?? ?? ?? ?? C6 85 D8 FE FF FF ?? 68 ?? ?? ?? ?? 6A ?? 8D 85 D9 FE FF FF 50 E8 ?? ?? …

Condition

( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x010B ) and any of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least one pattern in the rule must match.

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References

Sample hashes

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

  • 8c91a27bbdbe9fb0877daccd28bd7bb5

Licence & attribution

Author: FireEye

Source repository: Mandiant red team tool countermeasures @ 3561b71724

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright (c) 2023, MANDIANT

Original rule

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

Rule id: 376875f3-00f2-58d0-ae22-7f52ea566da2

Metadata

rev3

Tags:FILE

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