YARA · Malpedia signator rules
MALPEDIA_Win_Evilbunny_Auto
autogenerated rule brought to you by yara-signator
MalwareEvilbunnyMalpedia 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: Evilbunny.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-evilbunny-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Evilbunny_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "0fdd257f-e1de-5162-b898-318e3646215a"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.evilbunny"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.evilbunny_auto.yar#L1-L134"
= "N/A"
= "c0f269d64ef466ac9dc41c429b57bd677a932b045efbd4c52947e3b37d72f372"
= 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 = { 8b55e8 8902 8b45e8 c7400804000000 8b4d08 8b5108 83ea10 }
$sequence_1 = { e8???????? 8b4dfc 894108 8b55fc c7420400000000 8b45fc c70000000000 }
$sequence_2 = { 8b4dfc 0fb65105 8b45f0 0fb64814 83f103 23d1 83e203 }
$sequence_3 = { 8b4dfc e8???????? 8b4dfc c701???????? 8b45fc 83c408 3bec }
$sequence_4 = { 8b550c 8b420c 837c080800 7445 8b4dfc c1e104 8b550c }
$sequence_5 = { c705????????00000000 eb0c 8b55e0 52 e8???????? 83c404 6a08 }
$sequence_6 = { e8???????? 83c408 85c0 0f84fc000000 8d8da0eeffff 51 8b55f8 }
$sequence_7 = { c1e202 52 8b45fc 8b4830 c1e102 51 8b55fc }
$sequence_8 = { 51 e8???????? 83c404 8b55ec 8902 8b45ec c7400801000000 }
$sequence_9 = { c745dc00000000 8bf4 68e8030000 ff15???????? 3bf4 e8???????? 8b45e0 }
condition:
7 of them and filesize < 1695744
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8b55e8 8902 8b45e8 c7400804000000 8b4d08 8b5108 83ea10 } | |
| $sequence_1 | hex | { e8???????? 8b4dfc 894108 8b55fc c7420400000000 8b45fc c70000000000 } | |
| $sequence_2 | hex | { 8b4dfc 0fb65105 8b45f0 0fb64814 83f103 23d1 83e203 } | |
| $sequence_3 | hex | { 8b4dfc e8???????? 8b4dfc c701???????? 8b45fc 83c408 3bec } | |
| $sequence_4 | hex | { 8b550c 8b420c 837c080800 7445 8b4dfc c1e104 8b550c } | |
| $sequence_5 | hex | { c705????????00000000 eb0c 8b55e0 52 e8???????? 83c404 6a08 } | |
| $sequence_6 | hex | { e8???????? 83c408 85c0 0f84fc000000 8d8da0eeffff 51 8b55f8 } | |
| $sequence_7 | hex | { c1e202 52 8b45fc 8b4830 c1e102 51 8b55fc } | |
| $sequence_8 | hex | { 51 e8???????? 83c404 8b55ec 8902 8b45ec c7400801000000 } | |
| $sequence_9 | hex | { c745dc00000000 8bf4 68e8030000 ff15???????? 3bf4 e8???????? 8b45e0 } |
Condition
7 of them and filesize < 1695744In plain words (Heuristic)
- The file must be smaller than 1695744 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: 0fdd257f-e1de-5162-b898-318e3646215a
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
Related rules
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04