YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "8c9a0435-c2f5-5c56-96a6-d039595e42b0"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.op_blockbuster"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.op_blockbuster_auto.yar#L1-L312"
= "N/A"
= "4093ffe1a868b4a0da01c63f7eb7414a9b3d91b966d265764d4f9b873695a33e"
= 75
= 73
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8a08 80f920 7505 83c021 } | |
| $sequence_1 | hex | { c701???????? 8b497c 85c9 7407 } | |
| $sequence_2 | hex | { 57 683c400000 6a40 ff15???????? } | |
| $sequence_3 | hex | { e8???????? 6800400000 6a00 ff15???????? } | |
| $sequence_4 | hex | { f3ab 66ab aa 5f 85f6 5e } | |
| $sequence_5 | hex | { e8???????? 85c0 7407 83f802 } | |
| $sequence_6 | hex | { ff15???????? 6808400000 6a40 ff15???????? } | |
| $sequence_7 | hex | { 68???????? 56 ff15???????? 68???????? 56 a3???????? e8???????? } | |
| $sequence_8 | hex | { 56 50 8d45fc 6a04 50 } | |
| $sequence_9 | hex | { 3c69 7c08 3c70 7f04 0409 eb06 3c72 } | |
| $sequence_10 | hex | { 488d4590 4c8d8510010000 4889442448 4c89642440 4c89642438 4489642430 } | |
| $sequence_11 | hex | { ff15???????? 85f6 7404 85c0 } | |
| $sequence_12 | hex | { 4533c9 ba7a341200 e9???????? 4053 4883ec20 ff15???????? 8bc8 } | |
| $sequence_13 | hex | { 5e c3 68???????? ff15???????? 85c0 7412 68???????? } | |
| $sequence_14 | hex | { 56 6a00 ff15???????? 8bf8 85ff 7504 } | |
| $sequence_15 | hex | { c3 56 53 6a01 57 e8???????? } | |
| $sequence_16 | hex | { ff15???????? 488d542440 488bcf ff15???????? 4c8be0 4883f8ff 0f840b010000 } | |
| $sequence_17 | hex | { 6a01 57 e8???????? 56 e8???????? 83c414 b801000000 } | |
| $sequence_18 | hex | { 68???????? 56 e8???????? 56 e8???????? 83c438 } | |
| $sequence_19 | hex | { 4154 4155 4881ecf0070000 488b05???????? 4833c4 48898424d0070000 } | |
| $sequence_20 | hex | { ff15???????? 8b442444 eb10 48b8756e6b6e6f776e00 } | |
| $sequence_21 | hex | { 57 ff15???????? 8bc6 5f 5e c3 33c0 } | |
| $sequence_22 | hex | { c3 33c0 ebf8 53 33db 391d???????? 56 } | |
| $sequence_23 | hex | { 4533c9 33d2 4489642428 4c89642478 c7459068000000 } | |
| $sequence_24 | hex | { 488b8c24c0060000 4833cc e8???????? 4881c4d8060000 5e } | |
| $sequence_25 | hex | { 77c5 ff2485f20c4100 8bce e8???????? eb45 } | |
| $sequence_26 | hex | { 895de4 8b049dd8974400 8945d4 8955e8 8a5c1029 80fb02 } | |
| $sequence_27 | hex | { c1f906 6bd030 8a45fe 8b0c8dd8974400 88441129 8b0b } | |
| $sequence_28 | hex | { 83c8ff eb68 ff75fc 8d85e8efffff } | |
| $sequence_29 | hex | { 66f7460c0c01 7552 833c85048f400000 53 } | |
| $sequence_30 | hex | { e8???????? 59 8bc6 5e c20400 833d????????ff } | |
| $sequence_31 | hex | { 85c0 59 0f8495000000 56 } | |
| $sequence_32 | hex | { ff15???????? 85c0 7d07 33f6 e9???????? } |
Condition
7 of them and filesize < 74309632In 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
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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)
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
| 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 |
Tags:FILE
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