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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Unamedstealer

Detects unknown infostealer. Observed as 2nd stage and injects into .NET AppLaunch.exe

MalwareUnamedstealerditekSHen 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 unknown infostealer. Observed as 2nd stage and injects into .NET AppLaunch.exe

Associated malware family: Unamedstealer.

Targets: Windows PE.

It defines 9 patterns (9 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

malware-win-unamedstealer.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Unamedstealer : FILE
{
	meta:
		description = "Detects unknown infostealer. Observed as 2nd stage and injects into .NET AppLaunch.exe"
		author = "ditekSHen"
		id = "cb3d575b-3d53-5b89-abc1-3b3857ec9f46"
		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#L9478-L9494"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "84f4ac7489a0d522763f69ce55f816642a8511dc4b9698ce47c983020a2b7bea"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "HideMelt" fullword ascii
		$s2 = ".Implant" ascii
		$s3 = "SetUseragent" fullword ascii
		$s4 = "SendReport" fullword ascii
		$s5 = "cookiesList" fullword ascii
		$s6 = "WriteAppsList" fullword ascii
		$s7 = "Timeout /T 2 /Nobreak" fullword wide
		$s8 = "Directory not exists" wide
		$s9 = "### {0} ### ({1})" wide

	condition:
		uint16( 0 ) == 0x5a4d and 6 of them
}

Strings (9 patterns)

IdentifierTypeValueModifiers
$s1text"HideMelt"fullword ascii
$s2text".Implant"ascii
$s3text"SetUseragent"fullword ascii
$s4text"SendReport"fullword ascii
$s5text"cookiesList"fullword ascii
$s6text"WriteAppsList"fullword ascii
$s7text"Timeout /T 2 /Nobreak"fullword wide
$s8text"Directory not exists"wide
$s9text"### {0} ### ({1})"wide

Condition

uint16( 0 ) == 0x5a4d and 6 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 6 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: cb3d575b-3d53-5b89-abc1-3b3857ec9f46

Tags:FILE