YARA · Malpedia signator rules
MALPEDIA_Win_Fk_Undead_Auto
autogenerated rule brought to you by yara-signator
MalwareFk UndeadMalpedia 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: Fk Undead.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-fk-undead-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Fk_Undead_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "02969aed-17bc-5bd4-8372-32190b9962f6"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.fk_undead"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.fk_undead_auto.yar#L1-L131"
= "N/A"
= "568a37848273d11f37d140c220bd173a6167b00475b69ffcde402633d902008d"
= 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 = { 83c002 6685c9 75f5 2bc2 d1f8 83f816 7607 }
$sequence_1 = { 52 53 53 50 57 68c0300800 56 }
$sequence_2 = { 7416 8b450c 854160 740e b901000000 33c0 85c9 }
$sequence_3 = { 52 e8???????? 8bf8 83c404 897c2410 85ff 0f84ad000000 }
$sequence_4 = { 83fa03 750e 8b0c85e0650a10 8a06 46 88441926 2bf2 }
$sequence_5 = { 7407 50 ff15???????? 57 ff15???????? 8b442410 }
$sequence_6 = { 0fb74d1c 894c2420 8b4d24 89542424 8b5520 894c2454 0fb64d0a }
$sequence_7 = { 52 e8???????? 83c410 89442438 3bc6 0f8430010000 }
$sequence_8 = { 0f84a4020000 c7461801000000 e9???????? 803f0a 7533 837e2000 }
$sequence_9 = { 33db 48 ff248d84b40010 8d543e5e 8b443e18 8b5c3e3c 8944244c }
condition:
7 of them and filesize < 1418240
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 83c002 6685c9 75f5 2bc2 d1f8 83f816 7607 } | |
| $sequence_1 | hex | { 52 53 53 50 57 68c0300800 56 } | |
| $sequence_2 | hex | { 7416 8b450c 854160 740e b901000000 33c0 85c9 } | |
| $sequence_3 | hex | { 52 e8???????? 8bf8 83c404 897c2410 85ff 0f84ad000000 } | |
| $sequence_4 | hex | { 83fa03 750e 8b0c85e0650a10 8a06 46 88441926 2bf2 } | |
| $sequence_5 | hex | { 7407 50 ff15???????? 57 ff15???????? 8b442410 } | |
| $sequence_6 | hex | { 0fb74d1c 894c2420 8b4d24 89542424 8b5520 894c2454 0fb64d0a } | |
| $sequence_7 | hex | { 52 e8???????? 83c410 89442438 3bc6 0f8430010000 } | |
| $sequence_8 | hex | { 0f84a4020000 c7461801000000 e9???????? 803f0a 7533 837e2000 } | |
| $sequence_9 | hex | { 33db 48 ff248d84b40010 8d543e5e 8b443e18 8b5c3e3c 8944244c } |
Condition
7 of them and filesize < 1418240In plain words (Heuristic)
- The file must be smaller than 1418240 (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: 02969aed-17bc-5bd4-8372-32190b9962f6
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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