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MALPEDIA_Win_Op_Blockbuster_Auto

autogenerated rule brought to you by yara-signator

MalwareOp BlockbusterMalpedia 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 / 73

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Op Blockbuster.

It defines 33 patterns (0 text, 33 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-op-blockbuster-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Op_Blockbuster_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "8c9a0435-c2f5-5c56-96a6-d039595e42b0"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.op_blockbuster"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.op_blockbuster_auto.yar#L1-L312"
		license_url = "N/A"
		logic_hash = "4093ffe1a868b4a0da01c63f7eb7414a9b3d91b966d265764d4f9b873695a33e"
		score = 75
		quality = 73
		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 = { 8a08 80f920 7505 83c021 }
		$sequence_1 = { c701???????? 8b497c 85c9 7407 }
		$sequence_2 = { 57 683c400000 6a40 ff15???????? }
		$sequence_3 = { e8???????? 6800400000 6a00 ff15???????? }
		$sequence_4 = { f3ab 66ab aa 5f 85f6 5e }
		$sequence_5 = { e8???????? 85c0 7407 83f802 }
		$sequence_6 = { ff15???????? 6808400000 6a40 ff15???????? }
		$sequence_7 = { 68???????? 56 ff15???????? 68???????? 56 a3???????? e8???????? }
		$sequence_8 = { 56 50 8d45fc 6a04 50 }
		$sequence_9 = { 3c69 7c08 3c70 7f04 0409 eb06 3c72 }
		$sequence_10 = { 488d4590 4c8d8510010000 4889442448 4c89642440 4c89642438 4489642430 }
		$sequence_11 = { ff15???????? 85f6 7404 85c0 }
		$sequence_12 = { 4533c9 ba7a341200 e9???????? 4053 4883ec20 ff15???????? 8bc8 }
		$sequence_13 = { 5e c3 68???????? ff15???????? 85c0 7412 68???????? }
		$sequence_14 = { 56 6a00 ff15???????? 8bf8 85ff 7504 }
		$sequence_15 = { c3 56 53 6a01 57 e8???????? }
		$sequence_16 = { ff15???????? 488d542440 488bcf ff15???????? 4c8be0 4883f8ff 0f840b010000 }
		$sequence_17 = { 6a01 57 e8???????? 56 e8???????? 83c414 b801000000 }
		$sequence_18 = { 68???????? 56 e8???????? 56 e8???????? 83c438 }
		$sequence_19 = { 4154 4155 4881ecf0070000 488b05???????? 4833c4 48898424d0070000 }
		$sequence_20 = { ff15???????? 8b442444 eb10 48b8756e6b6e6f776e00 }
		$sequence_21 = { 57 ff15???????? 8bc6 5f 5e c3 33c0 }
		$sequence_22 = { c3 33c0 ebf8 53 33db 391d???????? 56 }
		$sequence_23 = { 4533c9 33d2 4489642428 4c89642478 c7459068000000 }
		$sequence_24 = { 488b8c24c0060000 4833cc e8???????? 4881c4d8060000 5e }
		$sequence_25 = { 77c5 ff2485f20c4100 8bce e8???????? eb45 }
		$sequence_26 = { 895de4 8b049dd8974400 8945d4 8955e8 8a5c1029 80fb02 }
		$sequence_27 = { c1f906 6bd030 8a45fe 8b0c8dd8974400 88441129 8b0b }
		$sequence_28 = { 83c8ff eb68 ff75fc 8d85e8efffff }
		$sequence_29 = { 66f7460c0c01 7552 833c85048f400000 53 }
		$sequence_30 = { e8???????? 59 8bc6 5e c20400 833d????????ff }
		$sequence_31 = { 85c0 59 0f8495000000 56 }
		$sequence_32 = { ff15???????? 85c0 7d07 33f6 e9???????? }

	condition:
		7 of them and filesize < 74309632
}

Strings (33 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8a08 80f920 7505 83c021 }
$sequence_1hex{ c701???????? 8b497c 85c9 7407 }
$sequence_2hex{ 57 683c400000 6a40 ff15???????? }
$sequence_3hex{ e8???????? 6800400000 6a00 ff15???????? }
$sequence_4hex{ f3ab 66ab aa 5f 85f6 5e }
$sequence_5hex{ e8???????? 85c0 7407 83f802 }
$sequence_6hex{ ff15???????? 6808400000 6a40 ff15???????? }
$sequence_7hex{ 68???????? 56 ff15???????? 68???????? 56 a3???????? e8???????? }
$sequence_8hex{ 56 50 8d45fc 6a04 50 }
$sequence_9hex{ 3c69 7c08 3c70 7f04 0409 eb06 3c72 }
$sequence_10hex{ 488d4590 4c8d8510010000 4889442448 4c89642440 4c89642438 4489642430 }
$sequence_11hex{ ff15???????? 85f6 7404 85c0 }
$sequence_12hex{ 4533c9 ba7a341200 e9???????? 4053 4883ec20 ff15???????? 8bc8 }
$sequence_13hex{ 5e c3 68???????? ff15???????? 85c0 7412 68???????? }
$sequence_14hex{ 56 6a00 ff15???????? 8bf8 85ff 7504 }
$sequence_15hex{ c3 56 53 6a01 57 e8???????? }
$sequence_16hex{ ff15???????? 488d542440 488bcf ff15???????? 4c8be0 4883f8ff 0f840b010000 }
$sequence_17hex{ 6a01 57 e8???????? 56 e8???????? 83c414 b801000000 }
$sequence_18hex{ 68???????? 56 e8???????? 56 e8???????? 83c438 }
$sequence_19hex{ 4154 4155 4881ecf0070000 488b05???????? 4833c4 48898424d0070000 }
$sequence_20hex{ ff15???????? 8b442444 eb10 48b8756e6b6e6f776e00 }
$sequence_21hex{ 57 ff15???????? 8bc6 5f 5e c3 33c0 }
$sequence_22hex{ c3 33c0 ebf8 53 33db 391d???????? 56 }
$sequence_23hex{ 4533c9 33d2 4489642428 4c89642478 c7459068000000 }
$sequence_24hex{ 488b8c24c0060000 4833cc e8???????? 4881c4d8060000 5e }
$sequence_25hex{ 77c5 ff2485f20c4100 8bce e8???????? eb45 }
$sequence_26hex{ 895de4 8b049dd8974400 8945d4 8955e8 8a5c1029 80fb02 }
$sequence_27hex{ c1f906 6bd030 8a45fe 8b0c8dd8974400 88441129 8b0b }
$sequence_28hex{ 83c8ff eb68 ff75fc 8d85e8efffff }
$sequence_29hex{ 66f7460c0c01 7552 833c85048f400000 53 }
$sequence_30hex{ e8???????? 59 8bc6 5e c20400 833d????????ff }
$sequence_31hex{ 85c0 59 0f8495000000 56 }
$sequence_32hex{ ff15???????? 85c0 7d07 33f6 e9???????? }

Condition

7 of them and filesize < 74309632

In plain words (Heuristic)

  • The file must be smaller than 74309632 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: 8c9a0435-c2f5-5c56-96a6-d039595e42b0

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