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SEKOIA_Ransomware_Win_Dodo_2023

Rule to detect Dodo ransomware samples.

MalwareSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2023-02-13
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Rule to detect Dodo ransomware samples.

Targets: Windows PE.

It defines 7 patterns (7 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

ransomware-win-dodo-2023.yarDetection Rule License 1.1
rule SEKOIA_Ransomware_Win_Dodo_2023 : FILE
{
	meta:
		description = "Rule to detect Dodo ransomware samples."
		author = "Sekoia.io"
		id = "190977d4-5a7a-4e15-8f90-085f82ec56c8"
		date = "2023-02-13"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/ransomware_win_dodo_2023.yar#L1-L22"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "aee45cc2540d49a28e765c30f1c4d0b853c1a74ea2260bd7614ece8e54c3bcb3"
		logic_hash = "01924360ef4bbecd220439290eba22838a3977793fdebd0ef0be74c342c0d152"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "DODOCRYPTER" ascii wide
		$s2 = "dodov2" ascii wide
		$s3 = "dodov2SPREAD.exe" ascii wide
		$s4 = "dodov2_readit.txt" ascii wide
		$s5 = "WELCOME, DODO has returned" ascii wide
		$s6 = "Monero Address: 442n8nf9zojie1JdkZqxDQJFDumBEgZmVZozLdYd5jVPSMws2oUPvNLJKca6JKojyA7zDCZCnMyYnKbY1JLNsbzWK6HNNqW" ascii wide
		$s7 = "The price for the software is $15. Payment can be made in Bitcoin or XMR." ascii wide

	condition:
		uint16be( 0 ) == 0x4d5a and 4 of them
}

Strings (7 patterns)

IdentifierTypeValueModifiers
$s1text"DODOCRYPTER"ascii wide
$s2text"dodov2"ascii wide
$s3text"dodov2SPREAD.exe"ascii wide
$s4text"dodov2_readit.txt"ascii wide
$s5text"WELCOME, DODO has returned"ascii wide
$s6text"Monero Address: 442n8nf9zojie1JdkZqxDQJFDumBEgZmVZozLdYd5jVPSMws2oUPvNLJKca6JKojyA7zDCZCnMyYnKbY1JLNsbzWK6HNNqW"ascii wide
$s7text"The price for the software is $15. Payment can be made in Bitcoin or XMR."ascii wide

Condition

uint16be( 0 ) == 0x4d5a 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

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • aee45cc2540d49a28e765c30f1c4d0b853c1a74ea2260bd7614ece8e54c3bcb3

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

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

Rule id: 190977d4-5a7a-4e15-8f90-085f82ec56c8

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE