Skip to content

YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Dlagent08

Detects known downloader agent downloading encoded binaries in patches

MalwareDlagent08ditekSHen 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 known downloader agent downloading encoded binaries in patches

Associated malware family: Dlagent08.

Targets: Windows PE.

It defines 1 patterns (0 text, 0 hex, 1 regex).

Summary generated from the rule's metadata and condition.

Rule source

malware-win-dlagent08.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Dlagent08 : FILE
{
	meta:
		description = "Detects known downloader agent downloading encoded binaries in patches"
		author = "ditekSHen"
		id = "e3450f93-7c57-5386-a901-bc5e710657a4"
		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#L4965-L4975"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "0238c13b00e5778ef216b4e8576c321803da6e269c96c3051b9cc45a3ac6e567"
		score = 75
		quality = 75
		tags = "FILE"
		snort2_sid = "920122"
		snort3_sid = "920119"

	strings:
		$pat = /\/base\/[A-F0-9]{32}\.html/ ascii wide

	condition:
		uint16( 0 ) == 0x5a4d and $pat and #pat > 1
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$patregex/\/base\/[A-F0-9]{32}\.html/ascii wide

Condition

uint16( 0 ) == 0x5a4d and $pat and #pat > 1

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • Pattern $pat must occur > 1 times.
  • Pattern $pat must be present.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: e3450f93-7c57-5386-a901-bc5e710657a4

Metadata

snort2_sid920122
snort3_sid920119

Tags:FILE