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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Tjkeylogger

TJKeylogger payload

MalwareTjkeyloggerditekSHen 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

TJKeylogger payload

Associated malware family: Tjkeylogger.

Targets: Windows PE.

It defines 7 patterns (7 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-tjkeylogger.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Tjkeylogger : FILE
{
	meta:
		description = "TJKeylogger payload"
		author = "ditekSHen"
		id = "6aaa11b2-3734-5538-b593-f5276f3acc72"
		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#L553-L567"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "52d98a6f5a2cfc6717b7097b4e70c1e813851222f9f06ae74be4e5703b0b0dde"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "TJKeyLogger" fullword ascii
		$s2 = "software\\microsoft\\windows\\currentversion\\run" fullword ascii
		$s3 = "\\Passwords.txt" ascii
		$s4 = "TJKeyLogItem" fullword ascii
		$s5 = "TJKeyAsyncLog" fullword ascii
		$s6 = "FM_GETDSKLST" fullword ascii
		$s7 = "KL_GETMODE" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and 5 of them
}

Strings (7 patterns)

IdentifierTypeValueModifiers
$s1text"TJKeyLogger"fullword ascii
$s2text"software\\microsoft\\windows\\currentversion\\run"fullword ascii
$s3text"\\Passwords.txt"ascii
$s4text"TJKeyLogItem"fullword ascii
$s5text"TJKeyAsyncLog"fullword ascii
$s6text"FM_GETDSKLST"fullword ascii
$s7text"KL_GETMODE"fullword ascii

Condition

uint16( 0 ) == 0x5a4d and 5 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 5 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: 6aaa11b2-3734-5538-b593-f5276f3acc72

Tags:FILE

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