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DITEKSHEN_MALWARE_Win_Metastealer

Detects MetaStealer infostealer

MalwareMetastealerditekSHen 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 MetaStealer infostealer

Associated malware family: Metastealer.

Targets: Windows PE.

It defines 16 patterns (16 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

malware-win-metastealer.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Metastealer : FILE
{
	meta:
		description = "Detects MetaStealer infostealer"
		author = "ditekSHen"
		id = "46aa30c1-12c2-56df-8c65-0b96147f9051"
		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#L11400-L11423"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "260c6d90a89ddb6219a5cbad18058e41611ae2dc68a8d4e589fa6ca81853752f"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "! #\"'&(&*)>=@?POQOROSOTOUOVOWOXOYOZO[O^]{z|z}z~z" fullword wide
		$s2 = "{0}{1}{2}" fullword wide
		$s3 = "localhost" fullword wide
		$s4 = "\\tdata" fullword wide
		$s5 = "DecryptBlob" fullword ascii
		$s6 = "GetMac" fullword ascii
		$s7 = "GetHdc" fullword ascii
		$s8 = "FindProc" fullword ascii
		$s9 = "targetPid" fullword ascii
		$s10 = "MessageSecurityOverTcp" fullword ascii
		$s11 = "ListOfProcesses" fullword ascii
		$s12 = "ListOfPrograms" fullword ascii
		$s13 = "browserPaths" fullword ascii
		$s14 = "configs" fullword ascii
		$s15 = "scanners" fullword ascii
		$s16 = "FileScannerRule" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and 7 of ( $s* )
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$s1text"! #\"'&(&*)>=@?POQOROSOTOUOVOWOXOYOZO[O^]{z|z}z~z"fullword wide
$s2text"{0}{1}{2}"fullword wide
$s3text"localhost"fullword wide
$s4text"\\tdata"fullword wide
$s5text"DecryptBlob"fullword ascii
$s6text"GetMac"fullword ascii
$s7text"GetHdc"fullword ascii
$s8text"FindProc"fullword ascii
$s9text"targetPid"fullword ascii
$s10text"MessageSecurityOverTcp"fullword ascii
$s11text"ListOfProcesses"fullword ascii
$s12text"ListOfPrograms"fullword ascii
$s13text"browserPaths"fullword ascii
$s14text"configs"fullword ascii
$s15text"scanners"fullword ascii
$s16text"FileScannerRule"fullword ascii

Condition

uint16( 0 ) == 0x5a4d and 7 of ( $s* )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 7 patterns in ( $s* ) 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: 46aa30c1-12c2-56df-8c65-0b96147f9051

Tags:FILE

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