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YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Loader_MSIL_LUALOADER_1

No description has been set in the source file - FireEye-RT

APT / threat actorMandiant red team tool countermeasuresBSD 2-Clause LicenseCompiles with YARA-X
Author
FireEye
Date
2020-12-18
Score / Quality
75 / 75

What this rule detects

No description has been set in the source file - FireEye-RT

Targets: Windows PE.

It defines 6 patterns (4 text, 1 hex, 1 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-loader-msil-lualoader-1.yarBSD 2-Clause License
rule FIREEYE_RT_APT_Loader_MSIL_LUALOADER_1 : FILE
{
	meta:
		description = "No description has been set in the source file - FireEye-RT"
		author = "FireEye"
		id = "970a869e-bd69-5609-bb8d-77bfa78b0630"
		date = "2020-12-18"
		modified = "2020-12-18"
		reference = "https://github.com/mandiant/red_team_tool_countermeasures/"
		source_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/rules/LUALOADER/production/yara/APT_Loader_MSIL_LUALOADER_1.yar#L4-L17"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		logic_hash = "2d73d434ac39ebde990aca817a54208cd04bfbce33f1bcadcf48a50d9389658c"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$sb1 = { 1? 72 [4] 14 D0 [2] 00 02 28 [2] 00 0A 1? 8D [2] 00 01 13 ?? 11 ?? 1? 1? 14 28 [2] 00 0A A2 11 ?? 1? 1? 14 28 [2] 00 0A A2 11 ?? 28 [2] 00 0A 28 [2] 00 0A 80 [2] 00 04 7E [2] 00 04 7B [2] 00 0A 7E [2] 00 04 11 ?? 11 ?? 6F [2] 00 0A 6F [2] 00 0A }
		$ss1 = "\x3bN\x00e\x00o\x00.\x00I\x00r\x00o\x00n\x00L\x00u\x00a\x00.\x00L\x00u\x00a\x00C\x00o\x00m\x00p\x00i\x00l\x00e\x00O\x00p\x00t\x00i\x00o\x00n\x00s\x00"
		$ss2 = "\x19C\x00o\x00m\x00p\x00i\x00l\x00e\x00C\x00h\x00u\x00n\x00k\x00"
		$ss3 = "\x0fd\x00o\x00c\x00h\x00u\x00n\x00k\x00"
		$ss4 = /.Reflection.Assembly:Load\(\w{1,64}\);?\s{0,245}\w{1,64}\.EntryPoint:Invoke\(nil/ wide
		$ss5 = "1F 8B 08 00 00 00 00 00" wide

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

Strings (6 patterns)

IdentifierTypeValueModifiers
$sb1hex{ 1? 72 [4] 14 D0 [2] 00 02 28 [2] 00 0A 1? 8D [2] 00 01 13 ?? 11 ?? 1? 1? 14 28 [2] 00 0A A2 11 ?? 1? 1? 14 28 [2] 00 0A A2 11 ?? 28 [2] 00 0A 28 [2] 00 0A 80 …
$ss1text"\x3bN\x00e\x00o\x00.\x00I\x00r\x00o\x00n\x00L\x00u\x00a\x00.\x00L\x00u\x00a\x00C\x00o\x00m\x00p\x00i\x00l\x00e\x00O\x00p\x00t\x00i\x00o\x00n\x00s\x00"
$ss2text"\x19C\x00o\x00m\x00p\x00i\x00l\x00e\x00C\x00h\x00u\x00n\x00k\x00"
$ss3text"\x0fd\x00o\x00c\x00h\x00u\x00n\x00k\x00"
$ss4regex/.Reflection.Assembly:Load\(\w{1,64}\);?\s{0,245}\w{1,64}\.EntryPoint:Invoke\(nil/wide
$ss5text"1F 8B 08 00 00 00 00 00"wide

Condition

( uint16( 0 ) == 0x5A4D and uint32( uint32( 0x3C ) ) == 0x00004550 ) 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

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: 970a869e-bd69-5609-bb8d-77bfa78b0630

Tags:FILE

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