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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Klogexe

Detects KLogExe

MalwareKlogexeditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekshen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 73

What this rule detects

Detects KLogExe

Associated malware family: Klogexe.

Targets: Windows PE.

It defines 11 patterns (11 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-klogexe.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Klogexe : FILE
{
	meta:
		description = "Detects KLogExe"
		author = "ditekshen"
		id = "8c3ebc2c-717b-5c42-9233-274006d4331b"
		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#L11918-L11937"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "1f1809b83dc468122022b68d63734ba1597c6fede01582c31d1700ca0b9e1e22"
		score = 75
		quality = 73
		tags = "FILE"
		clamav1 = "MALWARE.Win.Trojan.KLogExe"

	strings:
		$s1 = "[clip_s]: %s" ascii
		$s2 = "------ %d/%d/%d : %d/%d ------" ascii
		$s3 = "[RWin+]" ascii
		$s4 = "[Too many clip_tail]" ascii
		$s5 = "name=\"userfile\"; filename=\"%s\"" ascii
		$s6 = "Origin: http://" wide
		$s7 = "%s_%d_%d_%d_%d" wide
		$s8 = "/wp-content/include.php?_sys_" wide
		$s9 = "\\desktops.ini" wide
		$s10 = "KLogExe" wide nocase
		$s11 = "dynamic_import.cpp [resolve_call] can`nt" wide

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

Strings (11 patterns)

IdentifierTypeValueModifiers
$s1text"[clip_s]: %s"ascii
$s2text"------ %d/%d/%d : %d/%d ------"ascii
$s3text"[RWin+]"ascii
$s4text"[Too many clip_tail]"ascii
$s5text"name=\"userfile\"; filename=\"%s\""ascii
$s6text"Origin: http://"wide
$s7text"%s_%d_%d_%d_%d"wide
$s8text"/wp-content/include.php?_sys_"wide
$s9text"\\desktops.ini"wide
$s10text"KLogExe"wide nocase
$s11text"dynamic_import.cpp [resolve_call] can`nt"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: 8c3ebc2c-717b-5c42-9233-274006d4331b

Metadata

clamav1MALWARE.Win.Trojan.KLogExe

Tags:FILE

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