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DITEKSHEN_MALWARE_Win_Crimsonrat

Detects CrimsonRAT

MalwareCrimsonratditekSHen 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 CrimsonRAT

Associated malware family: Crimsonrat.

Targets: Windows PE.

It defines 17 patterns (17 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-crimsonrat.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Crimsonrat : FILE
{
	meta:
		description = "Detects CrimsonRAT"
		author = "ditekSHen"
		id = "54c9bbb2-9fa6-5c1f-9272-13255357ddbf"
		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#L6896-L6920"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "a40cf09dbaafb2e7b9130af1b40e46b4c38fed6185b16435ad4c118f9e6d56c7"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run|" fullword wide
		$s2 = "system volume information|" fullword wide
		$s3 = "program files (x86)|" fullword wide
		$s4 = "program files|" fullword wide
		$s5 = "<SAVE_AUTO<|" fullword wide
		$s6 = "add_up_files" fullword ascii
		$s7 = "see_folders" ascii
		$s8 = "see_files" ascii
		$s9 = "see_scren" ascii
		$s10 = "see_recording" ascii
		$s11 = "see_responce" ascii
		$s12 = "pull_data" ascii
		$s13 = "do_process" ascii
		$s14 = "do_updated" ascii
		$s15 = "IPSConfig" fullword ascii
		$s16 = "#Runing|ver#" wide
		$s17 = "|fileslog=" wide

	condition:
		uint16( 0 ) == 0x5a4d and 6 of them
}

Strings (17 patterns)

IdentifierTypeValueModifiers
$s1text"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run|"fullword wide
$s2text"system volume information|"fullword wide
$s3text"program files (x86)|"fullword wide
$s4text"program files|"fullword wide
$s5text"<SAVE_AUTO<|"fullword wide
$s6text"add_up_files"fullword ascii
$s7text"see_folders"ascii
$s8text"see_files"ascii
$s9text"see_scren"ascii
$s10text"see_recording"ascii
$s11text"see_responce"ascii
$s12text"pull_data"ascii
$s13text"do_process"ascii
$s14text"do_updated"ascii
$s15text"IPSConfig"fullword ascii
$s16text"#Runing|ver#"wide
$s17text"|fileslog="wide

Condition

uint16( 0 ) == 0x5a4d and 6 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 6 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: 54c9bbb2-9fa6-5c1f-9272-13255357ddbf

Tags:FILE

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