YARA · Malpedia signator rules
MALPEDIA_Win_Orcarat_Auto
autogenerated rule brought to you by yara-signator
MalwareOrcaratMalpedia 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: Orcarat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-orcarat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Orcarat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "04f42415-7fcb-5efc-9ffe-e9c2ead1bdb6"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.orcarat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.orcarat_auto.yar#L1-L123"
= "N/A"
= "94c36648eb707ecafb5b03dd70ef0419078170d69bed84996d811c45ff7795a7"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 8d442420 52 50 6a01 8bcf e8???????? 85c0 }
$sequence_1 = { 8d8424405a0000 52 50 a1???????? 8d8c2438020000 }
$sequence_2 = { 52 f3a4 8d7c2424 83c9ff f2ae f7d1 8d842428050000 }
$sequence_3 = { f7d1 2bf9 8d54241c 8bc1 8bf7 8bfa c1e902 }
$sequence_4 = { 2bf1 56 52 50 e8???????? 8b84242c500000 }
$sequence_5 = { c3 ff25???????? 55 8bec 837d100a }
$sequence_6 = { c6043000 8b4324 85c0 7451 }
$sequence_7 = { 51 52 6813000020 56 c744242801000000 c744243404000000 }
$sequence_8 = { 8b442410 85c0 7661 c68404240c000000 8d8424240c0000 6a00 50 }
$sequence_9 = { 89bbfc020000 8b834c030000 3bc7 7409 50 }
condition:
7 of them and filesize < 114688
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8d442420 52 50 6a01 8bcf e8???????? 85c0 } | |
| $sequence_1 | hex | { 8d8424405a0000 52 50 a1???????? 8d8c2438020000 } | |
| $sequence_2 | hex | { 52 f3a4 8d7c2424 83c9ff f2ae f7d1 8d842428050000 } | |
| $sequence_3 | hex | { f7d1 2bf9 8d54241c 8bc1 8bf7 8bfa c1e902 } | |
| $sequence_4 | hex | { 2bf1 56 52 50 e8???????? 8b84242c500000 } | |
| $sequence_5 | hex | { c3 ff25???????? 55 8bec 837d100a } | |
| $sequence_6 | hex | { c6043000 8b4324 85c0 7451 } | |
| $sequence_7 | hex | { 51 52 6813000020 56 c744242801000000 c744243404000000 } | |
| $sequence_8 | hex | { 8b442410 85c0 7661 c68404240c000000 8d8424240c0000 6a00 50 } | |
| $sequence_9 | hex | { 89bbfc020000 8b834c030000 3bc7 7409 50 } |
Condition
7 of them and filesize < 114688In plain words (Heuristic)
- The file must be smaller than 114688 (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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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: 04f42415-7fcb-5efc-9ffe-e9c2ead1bdb6
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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