YARA · Malpedia signator rules
MALPEDIA_Win_Thunker_Auto
autogenerated rule brought to you by yara-signator
MalwareThunkerMalpedia 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: Thunker.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-thunker-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Thunker_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "596b0505-d644-578c-8c9a-31483a868244"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.thunker"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.thunker_auto.yar#L1-L120"
= "N/A"
= "9cb29cda2c3ded251b99a2c2ca405d795779a9250b9c2344a0131abd8e836620"
= 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 = { 6800100000 8d85fceeffff 50 ffb5e0edffff e8???????? }
$sequence_1 = { 68204e0000 68d3710000 50 e8???????? 6a00 68804f1200 }
$sequence_2 = { 68???????? 8d45c0 50 e8???????? 83c438 c645c134 8d45c0 }
$sequence_3 = { 0f84fc000000 6a00 6a01 6a02 e8???????? 89c6 }
$sequence_4 = { 59 e8???????? bf60ea0000 b9d8d60000 }
$sequence_5 = { e8???????? 89c6 ff75fc e8???????? }
$sequence_6 = { ff750c ff7508 e8???????? 8d45f4 50 6a00 6a00 }
$sequence_7 = { c685fceeffff00 6a07 68???????? ff7508 }
$sequence_8 = { 5b c9 c3 55 89e5 b804110000 e8???????? }
$sequence_9 = { 89e5 51 56 57 8b7d08 ff750c }
condition:
7 of them and filesize < 73728
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6800100000 8d85fceeffff 50 ffb5e0edffff e8???????? } | |
| $sequence_1 | hex | { 68204e0000 68d3710000 50 e8???????? 6a00 68804f1200 } | |
| $sequence_2 | hex | { 68???????? 8d45c0 50 e8???????? 83c438 c645c134 8d45c0 } | |
| $sequence_3 | hex | { 0f84fc000000 6a00 6a01 6a02 e8???????? 89c6 } | |
| $sequence_4 | hex | { 59 e8???????? bf60ea0000 b9d8d60000 } | |
| $sequence_5 | hex | { e8???????? 89c6 ff75fc e8???????? } | |
| $sequence_6 | hex | { ff750c ff7508 e8???????? 8d45f4 50 6a00 6a00 } | |
| $sequence_7 | hex | { c685fceeffff00 6a07 68???????? ff7508 } | |
| $sequence_8 | hex | { 5b c9 c3 55 89e5 b804110000 e8???????? } | |
| $sequence_9 | hex | { 89e5 51 56 57 8b7d08 ff750c } |
Condition
7 of them and filesize < 73728In plain words (Heuristic)
- The file must be smaller than 73728 (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: 596b0505-d644-578c-8c9a-31483a868244
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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