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MALPEDIA_Win_Anatova_Ransom_Auto

autogenerated rule brought to you by yara-signator

MalwareAnatova RansomMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Anatova Ransom.

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

Summary generated from the rule's metadata and condition.

Rule source

win-anatova-ransom-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Anatova_Ransom_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "99b5620c-2809-5718-a8d2-ffcd23ba1221"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.anatova_ransom"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.anatova_ransom_auto.yar#L1-L129"
		license_url = "N/A"
		logic_hash = "bab7007d43a9262ad7ed85d1f30bb567a3a4c3cf4ff5544e602218a6885ef00a"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 83f800 0f8454010000 488d85d4fdffff 4989c3 488d058f410000 }
		$sequence_1 = { 4c89d1 4c89da 4c8b1d???????? 41ffd3 e9???????? 48b80000000000000000 c9 }
		$sequence_2 = { 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 0fb6c0 488b45a8 }
		$sequence_3 = { 488d058f410000 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 83f800 }
		$sequence_4 = { b807000000 884590 b809000000 884591 b80e000000 884592 b803000000 }
		$sequence_5 = { 488d0513300000 488945a0 488d0517300000 488945a8 }
		$sequence_6 = { 4c89da e8???????? 488d053ffdffff 488d0dc8a0ffff 29c8 488d4de0 4989c9 }
		$sequence_7 = { b814010000 4889442428 488d056e570000 4889442420 b800000000 4989c1 488d058e580000 }
		$sequence_8 = { 0fbe01 83f005 8801 ebdb 488b45e8 4989c2 4c89d1 }
		$sequence_9 = { 4889c1 83c001 8945d4 ebe1 b800000000 4889442428 48b80000000000000000 }

	condition:
		7 of them and filesize < 671744
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 83f800 0f8454010000 488d85d4fdffff 4989c3 488d058f410000 }
$sequence_1hex{ 4c89d1 4c89da 4c8b1d???????? 41ffd3 e9???????? 48b80000000000000000 c9 }
$sequence_2hex{ 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 0fb6c0 488b45a8 }
$sequence_3hex{ 488d058f410000 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 83f800 }
$sequence_4hex{ b807000000 884590 b809000000 884591 b80e000000 884592 b803000000 }
$sequence_5hex{ 488d0513300000 488945a0 488d0517300000 488945a8 }
$sequence_6hex{ 4c89da e8???????? 488d053ffdffff 488d0dc8a0ffff 29c8 488d4de0 4989c9 }
$sequence_7hex{ b814010000 4889442428 488d056e570000 4889442420 b800000000 4989c1 488d058e580000 }
$sequence_8hex{ 0fbe01 83f005 8801 ebdb 488b45e8 4989c2 4c89d1 }
$sequence_9hex{ 4889c1 83c001 8945d4 ebe1 b800000000 4889442428 48b80000000000000000 }

Condition

7 of them and filesize < 671744

In plain words (Heuristic)

  • The file must be smaller than 671744 (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: 99b5620c-2809-5718-a8d2-ffcd23ba1221

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE