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DITEKSHEN_MALWARE_Win_Rookie_Downloader

Detect malware downlaoder, variant of ZombieBoy downloader

MalwareRookieditekSHen 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

Detect malware downlaoder, variant of ZombieBoy downloader

Associated malware family: Rookie.

Targets: Windows PE.

It defines 5 patterns (5 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

malware-win-rookie-downloader.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Rookie_Downloader : FILE
{
	meta:
		description = "Detect malware downlaoder, variant of ZombieBoy downloader"
		author = "ditekSHen"
		id = "a991eecb-5275-5e33-bea4-e709590474a8"
		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#L10773-L10786"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "6d5625c2cd7e3a51c2fce9948e691ff2d1b7cf85083708790f89e15c6522059b"
		score = 75
		quality = 75
		tags = "FILE"
		clamav1 = "MALWARE.Win.Trojan.RookIE-Downloader"

	strings:
		$s1 = "shell:::{2559a1f3-21d7-11d4-bdaf-00c04f60b9f0}" fullword ascii
		$s2 = "taskkill /f /im hh.exe" fullword ascii
		$s3 = "RookIE/1.0" fullword ascii
		$s4 = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\0" fullword ascii
		$s5 = "#32770" fullword ascii

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

Strings (5 patterns)

IdentifierTypeValueModifiers
$s1text"shell:::{2559a1f3-21d7-11d4-bdaf-00c04f60b9f0}"fullword ascii
$s2text"taskkill /f /im hh.exe"fullword ascii
$s3text"RookIE/1.0"fullword ascii
$s4text"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\0"fullword ascii
$s5text"#32770"fullword ascii

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: a991eecb-5275-5e33-bea4-e709590474a8

Metadata

clamav1MALWARE.Win.Trojan.RookIE-Downloader

Tags:FILE