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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Darkvnc

Detects DarkVNC

MalwareDarkvncditekSHen 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 DarkVNC

Associated malware family: Darkvnc.

Targets: Windows PE.

It defines 12 patterns (12 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-darkvnc.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Darkvnc : FILE
{
	meta:
		description = "Detects DarkVNC"
		author = "ditekSHen"
		id = "3c7d215c-fcca-5a0f-b59c-d84fd894677a"
		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#L6677-L6696"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "b0dbde04c0a05e476d505b92cf7dbf3b4ef0dd9e88eafcd21b7a7d0e3623abbd"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "USR-%s(%s)_%S-%S%u%u" fullword wide
		$s2 = "BOT-%s(%s)_%S-%S%u%u" fullword wide
		$s3 = "USR-UnicodeErr(Err)_%s-%s%u%u" fullword ascii
		$s4 = "BOT-UnicodeErr(Err)_%s-%s%u%u" fullword ascii
		$s5 = "PRM_STRG" fullword wide
		$s6 = "bot_shell >" ascii
		$s7 = "monitor_off / monitor_on" ascii
		$s8 = "kbd_off / kbd_on" ascii
		$s9 = "ActiveDll: Dll inject thread for process 0x%x terminated with status: %u" ascii
		$s10 = "PsSup: File %s successfully started with parameter \"%s\"" ascii
		$s11 = "PsSup: ShellExecute failed. File: %s, error %u" ascii
		$s12 = "#hvnc" fullword ascii

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

Strings (12 patterns)

IdentifierTypeValueModifiers
$s1text"USR-%s(%s)_%S-%S%u%u"fullword wide
$s2text"BOT-%s(%s)_%S-%S%u%u"fullword wide
$s3text"USR-UnicodeErr(Err)_%s-%s%u%u"fullword ascii
$s4text"BOT-UnicodeErr(Err)_%s-%s%u%u"fullword ascii
$s5text"PRM_STRG"fullword wide
$s6text"bot_shell >"ascii
$s7text"monitor_off / monitor_on"ascii
$s8text"kbd_off / kbd_on"ascii
$s9text"ActiveDll: Dll inject thread for process 0x%x terminated with status: %u"ascii
$s10text"PsSup: File %s successfully started with parameter \"%s\""ascii
$s11text"PsSup: ShellExecute failed. File: %s, error %u"ascii
$s12text"#hvnc"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: 3c7d215c-fcca-5a0f-b59c-d84fd894677a

Tags:FILE

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