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YARA · CAPE Sandbox (CAPEv2)

CAPE_Nemty

Nemty Ransomware Payload

MalwareNemtyCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
kevoreilly
Date
2020-04-03
Score / Quality
75 / 70

What this rule detects

Nemty Ransomware Payload

Associated malware family: Nemty.

Targets: Windows PE.

It defines 3 patterns (3 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
nemty.yarGNU General Public License v3.0
rule CAPE_Nemty : FILE
{
	meta:
		description = "Nemty Ransomware Payload"
		author = "kevoreilly"
		id = "3aa8e1d7-f9cb-5b04-923d-7bed15ab8c3f"
		date = "2020-04-03"
		modified = "2020-04-03"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/data/yara/CAPE/Nemty.yar#L1-L13"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "a05974b561c67b4f1e0812639b74831edcf65686a06c0d380f0b45739e342419"
		score = 75
		quality = 70
		tags = "FILE"
		cape_type = "Nemty Payload"

	strings:
		$tordir = "TorDir"
		$decrypt = "DECRYPT.txt"
		$nemty = "NEMTY"

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

Strings (3 patterns)

IdentifierTypeValueModifiers
$tordirtext"TorDir"
$decrypttext"DECRYPT.txt"
$nemtytext"NEMTY"

Condition

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

In plain words (Heuristic)

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

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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: 3aa8e1d7-f9cb-5b04-923d-7bed15ab8c3f

Metadata

cape_typeNemty Payload

Tags:FILE

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