YARA · Malpedia signator rules
MALPEDIA_Win_Meduza_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
Associated malware family: Meduza.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-meduza-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Meduza_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "c0c15191-ded8-5ae0-8f8f-7ef94fb2eca1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.meduza"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.meduza_auto.yar#L1-L133"
= "N/A"
= "55be562129c487f1236189f3c578422d39d422aaafeec055785306bea9b6404f"
= 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 = { c785d8f6ffff0a6141f0 c785dcf6ffff216f18d1 8b85d8f6ffff 8b8ddcf6ffff 898530f1ffff 898d34f1ffff c785d8f6ffff76d35939 }
$sequence_1 = { eb10 83ceff bbffffff7f 8975e4 eb03 8b75d8 8d4dc8 }
$sequence_2 = { 898dfcfcffff 8d8da0f5ffff 8985f8fcffff 8d5101 660fef8df0fcffff 0f298da0f5ffff 0f1185d0ecffff }
$sequence_3 = { c745b407000000 50 e8???????? 83c404 c78544ffffffc87a4a00 f30f7e00 8b4808 }
$sequence_4 = { 898d4cd3ffff c785d8e4ffffcb46855e c785dce4ffffee6e1f36 8b85d8e4ffff 8b8ddce4ffff 898580eeffff 898d84eeffff }
$sequence_5 = { 83c408 c645fc0d 837f1408 7202 8b3f 8b8544feffff }
$sequence_6 = { e9???????? 8d8d50c7ffff e9???????? 8d8d50c7ffff e9???????? 8d8d80c7ffff e9???????? }
$sequence_7 = { c785d8e4ffffdc70e11a c785dce4fffff74b9182 8b85d8e4ffff 8b8ddce4ffff 898568e9ffff c5fe6f85e0cdffff c5fdef8540e9ffff }
$sequence_8 = { e9???????? 8d8dc0faffff e9???????? 8d8df0faffff e9???????? 8d8df0faffff e9???????? }
$sequence_9 = { 23ce b801000000 d3e0 8b4dbc 8502 0f8499000000 e8???????? }
condition:
7 of them and filesize < 1433600
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c785d8f6ffff0a6141f0 c785dcf6ffff216f18d1 8b85d8f6ffff 8b8ddcf6ffff 898530f1ffff 898d34f1ffff c785d8f6ffff76d35939 } | |
| $sequence_1 | hex | { eb10 83ceff bbffffff7f 8975e4 eb03 8b75d8 8d4dc8 } | |
| $sequence_2 | hex | { 898dfcfcffff 8d8da0f5ffff 8985f8fcffff 8d5101 660fef8df0fcffff 0f298da0f5ffff 0f1185d0ecffff } | |
| $sequence_3 | hex | { c745b407000000 50 e8???????? 83c404 c78544ffffffc87a4a00 f30f7e00 8b4808 } | |
| $sequence_4 | hex | { 898d4cd3ffff c785d8e4ffffcb46855e c785dce4ffffee6e1f36 8b85d8e4ffff 8b8ddce4ffff 898580eeffff 898d84eeffff } | |
| $sequence_5 | hex | { 83c408 c645fc0d 837f1408 7202 8b3f 8b8544feffff } | |
| $sequence_6 | hex | { e9???????? 8d8d50c7ffff e9???????? 8d8d50c7ffff e9???????? 8d8d80c7ffff e9???????? } | |
| $sequence_7 | hex | { c785d8e4ffffdc70e11a c785dce4fffff74b9182 8b85d8e4ffff 8b8ddce4ffff 898568e9ffff c5fe6f85e0cdffff c5fdef8540e9ffff } | |
| $sequence_8 | hex | { e9???????? 8d8dc0faffff e9???????? 8d8df0faffff e9???????? 8d8df0faffff e9???????? } | |
| $sequence_9 | hex | { 23ce b801000000 d3e0 8b4dbc 8502 0f8499000000 e8???????? } |
Condition
7 of them and filesize < 1433600In plain words (Heuristic)
- The file must be smaller than 1433600 (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: c0c15191-ded8-5ae0-8f8f-7ef94fb2eca1
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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