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DITEKSHEN_MALWARE_Win_Njrat

Detects NjRAT / Bladabindi / NjRAT Golden

MalwareNjratditekSHen 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 NjRAT / Bladabindi / NjRAT Golden

Associated malware family: Njrat.

Targets: Windows PE.

It defines 10 patterns (7 text, 1 hex, 2 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-njrat.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Njrat : FILE
{
	meta:
		description = "Detects NjRAT / Bladabindi / NjRAT Golden"
		author = "ditekSHen"
		id = "078dea64-8f95-5939-a1fb-c0a888adcf0d"
		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#L5203-L5220"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "92d535a7c7f361b7a0901d0b99427ebc82a69577bfea73c04a7f9d51d2054b36"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$x1 = /Njrat\s\d+\.\d+\sGolden\s/ wide
		$s1 = /\sfirewall\s(add|delete)\sallowedprogram/ wide
		$s2 = { 63 00 6d 00 64 00 2e 00 65 00 78 00 65 00 20 00 2f 00 (63|6b) 00 20 00 70 00 69 00 6e 00 67 }
		$s3 = "Execute ERROR" wide
		$s4 = "Download ERROR" wide
		$s5 = "[kl]" fullword wide
		$s6 = "UploadValues" fullword wide
		$s7 = "winmgmts:\\\\.\\root\\SecurityCenter2" fullword wide
		$s8 = "HideM" fullword wide
		$s9 = "No Antivirus" fullword wide

	condition:
		uint16( 0 ) == 0x5a4d and 4 of them
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$x1regex/Njrat\s\d+\.\d+\sGolden\s/wide
$s1regex/\sfirewall\s(add|delete)\sallowedprogram/wide
$s2hex{ 63 00 6d 00 64 00 2e 00 65 00 78 00 65 00 20 00 2f 00 (63|6b) 00 20 00 70 00 69 00 6e 00 67 }
$s3text"Execute ERROR"wide
$s4text"Download ERROR"wide
$s5text"[kl]"fullword wide
$s6text"UploadValues"fullword wide
$s7text"winmgmts:\\\\.\\root\\SecurityCenter2"fullword wide
$s8text"HideM"fullword wide
$s9text"No Antivirus"fullword wide

Condition

uint16( 0 ) == 0x5a4d and 4 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 4 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: 078dea64-8f95-5939-a1fb-c0a888adcf0d

Tags:FILE

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