YARA · Malpedia signator rules
MALPEDIA_Win_Megumin_Auto
autogenerated rule brought to you by yara-signator
MalwareMeguminMalpedia 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: Megumin.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-megumin-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Megumin_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "c406e2e6-ad08-5c42-b07a-0d46a0df3645"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.megumin"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.megumin_auto.yar#L1-L134"
= "N/A"
= "c683aff04bae9dadba06438a1553cc52b63fca2f76e9547da5776897d27f9da7"
= 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 = { 83ec18 c645fc2b 8bf4 8965c8 b9???????? 6a0e e8???????? }
$sequence_1 = { 53 56 57 33f6 c78524f8ffff00000000 56 56 }
$sequence_2 = { 8d4dd8 e9???????? 8d4db8 e9???????? 8b542408 8d420c 8b8a2cfeffff }
$sequence_3 = { 8d4dd8 c645fc01 e8???????? 83ec10 8d8dc0fdffff 68???????? e8???????? }
$sequence_4 = { 8d8d70ffffff c745840f000000 c68570ffffff00 6a07 68???????? e8???????? 8d9570ffffff }
$sequence_5 = { 53 56 8bf1 57 8b4608 2500010000 7414 }
$sequence_6 = { 8d8dd4fbffff 6a08 68???????? c785e4fbffff00000000 c785e8fbffff0f000000 c685d4fbffff00 e8???????? }
$sequence_7 = { 0f82cc0a0000 2bc6 83c9ff 83f8ff 0f42c8 837de810 8d45d4 }
$sequence_8 = { 8b1f 53 56 e8???????? ff7514 ff75f0 ff75f8 }
$sequence_9 = { 51 ff7668 e8???????? ff7658 8bce 66c746640000 c6467401 }
condition:
7 of them and filesize < 1007616
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 83ec18 c645fc2b 8bf4 8965c8 b9???????? 6a0e e8???????? } | |
| $sequence_1 | hex | { 53 56 57 33f6 c78524f8ffff00000000 56 56 } | |
| $sequence_2 | hex | { 8d4dd8 e9???????? 8d4db8 e9???????? 8b542408 8d420c 8b8a2cfeffff } | |
| $sequence_3 | hex | { 8d4dd8 c645fc01 e8???????? 83ec10 8d8dc0fdffff 68???????? e8???????? } | |
| $sequence_4 | hex | { 8d8d70ffffff c745840f000000 c68570ffffff00 6a07 68???????? e8???????? 8d9570ffffff } | |
| $sequence_5 | hex | { 53 56 8bf1 57 8b4608 2500010000 7414 } | |
| $sequence_6 | hex | { 8d8dd4fbffff 6a08 68???????? c785e4fbffff00000000 c785e8fbffff0f000000 c685d4fbffff00 e8???????? } | |
| $sequence_7 | hex | { 0f82cc0a0000 2bc6 83c9ff 83f8ff 0f42c8 837de810 8d45d4 } | |
| $sequence_8 | hex | { 8b1f 53 56 e8???????? ff7514 ff75f0 ff75f8 } | |
| $sequence_9 | hex | { 51 ff7668 e8???????? ff7658 8bce 66c746640000 c6467401 } |
Condition
7 of them and filesize < 1007616In plain words (Heuristic)
- The file must be smaller than 1007616 (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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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: c406e2e6-ad08-5c42-b07a-0d46a0df3645
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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