Skip to content

YARA · CAPE Sandbox (CAPEv2)

CAPE_Masslogger

MassLogger

MalwareMassloggerCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
kevoreilly
Date
2020-10-20
Modified
2020-11-24
Score / Quality
75 / 70

What this rule detects

MassLogger

Associated malware family: Masslogger.

Targets: Windows PE.

It defines 2 patterns (2 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

masslogger.yarGNU General Public License v3.0
rule CAPE_Masslogger : FILE
{
	meta:
		description = "MassLogger"
		author = "kevoreilly"
		id = "0743421a-36f7-5b7c-859f-b461511151cb"
		date = "2020-10-20"
		modified = "2020-11-24"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/data/yara/CAPE/MassLogger.yar#L1-L12"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "c8d82694810aafbdc6a35a661e7431e9536035e2f7fef90b9359064c4209b66c"
		score = 75
		quality = 70
		tags = "FILE"
		cape_type = "MassLogger Payload"

	strings:
		$name = "MassLogger"
		$fody = "Costura"

	condition:
		uint16( 0 ) == 0x5A4D and 2 of them
}

Strings (2 patterns)

IdentifierTypeValueModifiers
$nametext"MassLogger"
$fodytext"Costura"

Condition

uint16( 0 ) == 0x5A4D and 2 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 2 patterns in the rule must match.

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: kevoreilly

Source repository: CAPE Sandbox (CAPEv2) @ 6b15e76f28

Licence: GNU General Public License v3.0 (repository licence)

Copyright notice: Cuckoo Sandbox is copyrighted by the Cuckoo Foundation.

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 0743421a-36f7-5b7c-859f-b461511151cb

Metadata

cape_typeMassLogger Payload

Tags:FILE