YARA · Malpedia signator rules
MALPEDIA_Win_Fakeword_Auto
autogenerated rule brought to you by yara-signator
MalwareFakewordMalpedia 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: Fakeword.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-fakeword-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Fakeword_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "5742bbe6-a351-5e75-a811-907f4506a816"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.fakeword"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.fakeword_auto.yar#L1-L125"
= "N/A"
= "bf3af91eec46a25586a139e90909fd74d2b75e281f4a326e8e73dd924abbc0c7"
= 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 = { 668b4d06 6683f901 0f8295010000 8bc1 8db5f8000000 }
$sequence_1 = { 68???????? 55 be41000000 ff15???????? 8b3d???????? 8b1d???????? c74424781a000000 }
$sequence_2 = { 81c400010000 c20800 53 ff15???????? 85c0 }
$sequence_3 = { 33c0 8bfe 68???????? f3ab 56 }
$sequence_4 = { e8???????? 83c404 6a00 6a00 6a00 68???????? ff15???????? }
$sequence_5 = { ffd7 8bbc240c010000 8d542408 52 6a35 8d7704 eb11 }
$sequence_6 = { 83c414 6800000100 68???????? 56 ff15???????? }
$sequence_7 = { 66895004 8d442414 50 55 e8???????? 8b35???????? }
$sequence_8 = { 5f 5e 5d 59 c3 80f9c8 7610 }
$sequence_9 = { c20800 8bc8 56 8bb42408100000 8bd1 57 8d7c240c }
condition:
7 of them and filesize < 98304
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 668b4d06 6683f901 0f8295010000 8bc1 8db5f8000000 } | |
| $sequence_1 | hex | { 68???????? 55 be41000000 ff15???????? 8b3d???????? 8b1d???????? c74424781a000000 } | |
| $sequence_2 | hex | { 81c400010000 c20800 53 ff15???????? 85c0 } | |
| $sequence_3 | hex | { 33c0 8bfe 68???????? f3ab 56 } | |
| $sequence_4 | hex | { e8???????? 83c404 6a00 6a00 6a00 68???????? ff15???????? } | |
| $sequence_5 | hex | { ffd7 8bbc240c010000 8d542408 52 6a35 8d7704 eb11 } | |
| $sequence_6 | hex | { 83c414 6800000100 68???????? 56 ff15???????? } | |
| $sequence_7 | hex | { 66895004 8d442414 50 55 e8???????? 8b35???????? } | |
| $sequence_8 | hex | { 5f 5e 5d 59 c3 80f9c8 7610 } | |
| $sequence_9 | hex | { c20800 8bc8 56 8bb42408100000 8bd1 57 8d7c240c } |
Condition
7 of them and filesize < 98304In plain words (Heuristic)
- The file must be smaller than 98304 (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: 5742bbe6-a351-5e75-a811-907f4506a816
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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