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MALPEDIA_Win_Makop_Ransomware_Auto

autogenerated rule brought to you by yara-signator

MalwareMakop RansomwareMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2023-07-11
Modified
2023-07-15
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Makop Ransomware.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-makop-ransomware-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Makop_Ransomware_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "cd34e745-9497-5ffc-bd73-ecb5996e2067"
		date = "2023-07-11"
		modified = "2023-07-15"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.makop_ransomware"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.makop_ransomware_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "3c7cc3419f322a8e9eb8473ecaf54fc5da0725e8a0f35ff3f90245e28389848b"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20230705"
		malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
		malpedia_version = "20230715"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { eb02 33f6 803d????????00 751f 803d????????00 7516 80fb01 }
		$sequence_1 = { 52 50 51 e8???????? 8b542430 83c40c 68e0930400 }
		$sequence_2 = { 52 66c7060802 66c746041066 c6460820 }
		$sequence_3 = { 56 ff15???????? 85c0 750b 8906 32c0 5e }
		$sequence_4 = { 83c001 84c9 75f7 2bc7 83e801 39442404 720a }
		$sequence_5 = { ffd6 85ff 740f 85db 740b 837c242000 7404 }
		$sequence_6 = { 8b2d???????? 3beb 742e 8b4524 3bc3 7407 50 }
		$sequence_7 = { 7416 e8???????? 6a00 e8???????? 83c404 }
		$sequence_8 = { e8???????? 8b442418 83c40c 8b4f0c }
		$sequence_9 = { 742f 33c0 3906 763d 8d4c2448 }

	condition:
		7 of them and filesize < 107520
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ eb02 33f6 803d????????00 751f 803d????????00 7516 80fb01 }
$sequence_1hex{ 52 50 51 e8???????? 8b542430 83c40c 68e0930400 }
$sequence_2hex{ 52 66c7060802 66c746041066 c6460820 }
$sequence_3hex{ 56 ff15???????? 85c0 750b 8906 32c0 5e }
$sequence_4hex{ 83c001 84c9 75f7 2bc7 83e801 39442404 720a }
$sequence_5hex{ ffd6 85ff 740f 85db 740b 837c242000 7404 }
$sequence_6hex{ 8b2d???????? 3beb 742e 8b4524 3bc3 7407 50 }
$sequence_7hex{ 7416 e8???????? 6a00 e8???????? 83c404 }
$sequence_8hex{ e8???????? 8b442418 83c40c 8b4f0c }
$sequence_9hex{ 742f 33c0 3906 763d 8d4c2448 }

Condition

7 of them and filesize < 107520

In plain words (Heuristic)

  • The file must be smaller than 107520 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: cd34e745-9497-5ffc-bd73-ecb5996e2067

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20230705
malpedia_hash42d0574f4405bd7d2b154d321d345acb18834a41
malpedia_version20230715
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE