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DITEKSHEN_MALWARE_Win_Meterpreterstager

Detects Meterpreter stager payload

MalwareMeterpreterstagerditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 75

What this rule detects

Detects Meterpreter stager payload

Associated malware family: Meterpreterstager.

Targets: Windows PE.

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

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-meterpreterstager.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Meterpreterstager : FILE
{
	meta:
		description = "Detects Meterpreter stager payload"
		author = "ditekSHen"
		id = "dfbc37e9-13e0-55e2-a501-1005eea52b63"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L3384-L3395"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "0ac53a10abb1e4dd7da57872cd1779851d953127a912c31a5e411d8eb9bd07f4"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "PAYLOAD:" fullword ascii
		$s2 = "AQAPRQVH1" fullword ascii
		$s3 = "ws2_32" fullword ascii
		$s4 = "KERNEL32.dll" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and all of them and filesize < 100KB
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$s1text"PAYLOAD:"fullword ascii
$s2text"AQAPRQVH1"fullword ascii
$s3text"ws2_32"fullword ascii
$s4text"KERNEL32.dll"fullword ascii

Condition

uint16( 0 ) == 0x5a4d and all of them and filesize < 100KB

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must be smaller than 100KB (a cheap guard that skips large files).
  • All patterns in the rule must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

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

Rule id: dfbc37e9-13e0-55e2-a501-1005eea52b63

Tags:FILE

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