YARA · Malpedia signator rules
MALPEDIA_Win_Felismus_Auto
autogenerated rule brought to you by yara-signator
MalwareFelismusMalpedia 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: Felismus.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-felismus-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Felismus_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "3f2c0e26-c37d-557f-9ad8-75051e096f9d"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.felismus"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.felismus_auto.yar#L1-L129"
= "N/A"
= "893bdfe24db443bd54242bf3384297b8c01720bb5dff66426f96a589ffe0666d"
= 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 = { d3eb 8b0d???????? d3e0 8bce f7d1 0bd8 8b442428 }
$sequence_1 = { d3e6 8b482c 894c243c 0bd6 8bf3 03d3 }
$sequence_2 = { 89542410 8b5110 56 2be8 57 89542420 bb01000000 }
$sequence_3 = { 46 83fe04 88040a 7ceb 43 83c704 83fb04 }
$sequence_4 = { e8???????? 83c444 6a32 e8???????? 8bf8 8b4514 }
$sequence_5 = { 33c0 8bfb 895de4 f3ab eb06 8b5de4 8b7508 }
$sequence_6 = { 83e802 7469 48 7442 48 741b 8d942450040000 }
$sequence_7 = { 56 ffd3 83c40c eb06 8b1d???????? 6804010000 e8???????? }
$sequence_8 = { 6801040000 ff15???????? 8be8 83c404 }
$sequence_9 = { 55 53 ff15???????? 85c0 0f848e010000 6801040000 ff15???????? }
condition:
7 of them and filesize < 204800
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { d3eb 8b0d???????? d3e0 8bce f7d1 0bd8 8b442428 } | |
| $sequence_1 | hex | { d3e6 8b482c 894c243c 0bd6 8bf3 03d3 } | |
| $sequence_2 | hex | { 89542410 8b5110 56 2be8 57 89542420 bb01000000 } | |
| $sequence_3 | hex | { 46 83fe04 88040a 7ceb 43 83c704 83fb04 } | |
| $sequence_4 | hex | { e8???????? 83c444 6a32 e8???????? 8bf8 8b4514 } | |
| $sequence_5 | hex | { 33c0 8bfb 895de4 f3ab eb06 8b5de4 8b7508 } | |
| $sequence_6 | hex | { 83e802 7469 48 7442 48 741b 8d942450040000 } | |
| $sequence_7 | hex | { 56 ffd3 83c40c eb06 8b1d???????? 6804010000 e8???????? } | |
| $sequence_8 | hex | { 6801040000 ff15???????? 8be8 83c404 } | |
| $sequence_9 | hex | { 55 53 ff15???????? 85c0 0f848e010000 6801040000 ff15???????? } |
Condition
7 of them and filesize < 204800In plain words (Heuristic)
- The file must be smaller than 204800 (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.
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: 3f2c0e26-c37d-557f-9ad8-75051e096f9d
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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