YARA · Malpedia signator rules
MALPEDIA_Win_Ondritols_Auto
autogenerated rule brought to you by yara-signator
MalwareOndritolsMalpedia 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: Ondritols.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-ondritols-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ondritols_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f1b815f1-229d-587f-9b83-698adf9033b8"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.ondritols"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ondritols_auto.yar#L1-L132"
= "N/A"
= "5c8bafb3ef1aa0c6c467b3ea0bd2b3c727b4a1c0491ef4c729d846f51f47fabb"
= 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 = { 898558ffffff 895804 33c9 8908 8b8558ffffff 8d9558ffffff 8910 }
$sequence_1 = { 8d542412 c6474901 39542424 0f8533010000 85db 7517 }
$sequence_2 = { 59 894df8 8b45f8 8b4df8 8b5054 2b5158 3b550c }
$sequence_3 = { 8b4508 50 8b4de8 e8???????? e9???????? 8b45a0 6bc00a }
$sequence_4 = { 50 57 6a00 68e9fd0000 ffd3 8bf0 8bc7 }
$sequence_5 = { c22000 c745fcffffffff 837d2010 720c 8b450c 50 e8???????? }
$sequence_6 = { 51 8b4dec e8???????? 8985acfdffff c645fc04 8d45d8 }
$sequence_7 = { 83c40c 837d2010 8b450c 7303 8d450c 803c3839 7e64 }
$sequence_8 = { 8b5d08 33c0 8945f0 c703???????? c74360d4534500 8945fc 8b03 }
$sequence_9 = { e8???????? 68???????? 8d858cfdffff 50 c7858cfdffffc0544500 e8???????? 8d8d30feffff }
condition:
7 of them and filesize < 964608
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 898558ffffff 895804 33c9 8908 8b8558ffffff 8d9558ffffff 8910 } | |
| $sequence_1 | hex | { 8d542412 c6474901 39542424 0f8533010000 85db 7517 } | |
| $sequence_2 | hex | { 59 894df8 8b45f8 8b4df8 8b5054 2b5158 3b550c } | |
| $sequence_3 | hex | { 8b4508 50 8b4de8 e8???????? e9???????? 8b45a0 6bc00a } | |
| $sequence_4 | hex | { 50 57 6a00 68e9fd0000 ffd3 8bf0 8bc7 } | |
| $sequence_5 | hex | { c22000 c745fcffffffff 837d2010 720c 8b450c 50 e8???????? } | |
| $sequence_6 | hex | { 51 8b4dec e8???????? 8985acfdffff c645fc04 8d45d8 } | |
| $sequence_7 | hex | { 83c40c 837d2010 8b450c 7303 8d450c 803c3839 7e64 } | |
| $sequence_8 | hex | { 8b5d08 33c0 8945f0 c703???????? c74360d4534500 8945fc 8b03 } | |
| $sequence_9 | hex | { e8???????? 68???????? 8d858cfdffff 50 c7858cfdffffc0544500 e8???????? 8d8d30feffff } |
Condition
7 of them and filesize < 964608In plain words (Heuristic)
- The file must be smaller than 964608 (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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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: f1b815f1-229d-587f-9b83-698adf9033b8
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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