YARA · Malpedia signator rules
MALPEDIA_Win_Unidentified_121_Auto
autogenerated rule brought to you by yara-signator
- 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
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-unidentified-121-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_121_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "803b6d69-9fea-5e26-9aac-a8930de42ad2"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_121"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_121_auto.yar#L1-L161"
= "N/A"
= "a09b8493f01985477064c691c4e2e92558ae7d4b7655d570ca50760a5de6ea22"
= 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 = { 7466 498d4002 48894318 410fb64001 }
$sequence_1 = { 8b55fc 8b4510 894248 8d4db4 }
$sequence_2 = { 8b55fc 8b4510 8b4814 894a1c }
$sequence_3 = { 8b55fc 8b4510 8b4a08 3b481c }
$sequence_4 = { c70700000000 4889d8 4883c440 5b 5e 5f }
$sequence_5 = { 4889d9 e8???????? 488b8300010000 483dff000000 0f848a000000 }
$sequence_6 = { 4885c0 4989c1 44897b4c 7418 488b4318 803845 }
$sequence_7 = { 31d2 4889d9 e8???????? 488d0d4c440000 89c3 e8???????? 89d8 }
$sequence_8 = { 8b55fc 8b4510 8b4c9004 51 }
$sequence_9 = { 3c6d 0f84bb000000 4531ed 488d3dfc330100 b903000000 4c89e6 }
$sequence_10 = { 4883ec38 448baa90000000 4889cf 4901cd b975ee4070 e8???????? }
$sequence_11 = { 8b55fc 8b4510 8902 33c9 }
$sequence_12 = { 8b55fc 8b4510 8b0c90 51 8d5588 }
$sequence_13 = { 8b55fc 8b4510 894204 8b4dfc 51 }
$sequence_14 = { 4883ec20 488d0524590000 4889cb 488901 e8???????? }
$sequence_15 = { 8b55fc 8b4510 894220 8b4dfc }
condition:
7 of them and filesize < 2419712
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 7466 498d4002 48894318 410fb64001 } | |
| $sequence_1 | hex | { 8b55fc 8b4510 894248 8d4db4 } | |
| $sequence_2 | hex | { 8b55fc 8b4510 8b4814 894a1c } | |
| $sequence_3 | hex | { 8b55fc 8b4510 8b4a08 3b481c } | |
| $sequence_4 | hex | { c70700000000 4889d8 4883c440 5b 5e 5f } | |
| $sequence_5 | hex | { 4889d9 e8???????? 488b8300010000 483dff000000 0f848a000000 } | |
| $sequence_6 | hex | { 4885c0 4989c1 44897b4c 7418 488b4318 803845 } | |
| $sequence_7 | hex | { 31d2 4889d9 e8???????? 488d0d4c440000 89c3 e8???????? 89d8 } | |
| $sequence_8 | hex | { 8b55fc 8b4510 8b4c9004 51 } | |
| $sequence_9 | hex | { 3c6d 0f84bb000000 4531ed 488d3dfc330100 b903000000 4c89e6 } | |
| $sequence_10 | hex | { 4883ec38 448baa90000000 4889cf 4901cd b975ee4070 e8???????? } | |
| $sequence_11 | hex | { 8b55fc 8b4510 8902 33c9 } | |
| $sequence_12 | hex | { 8b55fc 8b4510 8b0c90 51 8d5588 } | |
| $sequence_13 | hex | { 8b55fc 8b4510 894204 8b4dfc 51 } | |
| $sequence_14 | hex | { 4883ec20 488d0524590000 4889cb 488901 e8???????? } | |
| $sequence_15 | hex | { 8b55fc 8b4510 894220 8b4dfc } |
Condition
7 of them and filesize < 2419712In plain words (Heuristic)
- The file must be smaller than 2419712 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: 803b6d69-9fea-5e26-9aac-a8930de42ad2
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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