YARA · Malpedia signator rules
MALPEDIA_Win_Chthonic_Auto
autogenerated rule brought to you by yara-signator
MalwareChthonicMalpedia 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: Chthonic.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-chthonic-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Chthonic_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "8b64add5-ff03-5fa0-9d49-9279e42d139e"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.chthonic"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.chthonic_auto.yar#L1-L121"
= "N/A"
= "868310f060146371dd87c106e4ad6857182f77f3854b6b725bec1227384a4b4b"
= 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 = { 5f c1ee1f e9???????? 8b041a 8bc8 83c204 }
$sequence_1 = { 53 ff7510 ff7508 e8???????? 85c0 7502 b301 }
$sequence_2 = { 3bc3 7cf4 33f6 33d2 8bc6 f77514 }
$sequence_3 = { 81e1ff00ff00 0bc1 89470c 5f }
$sequence_4 = { 894dfc 85ff 7459 4f 8bf0 }
$sequence_5 = { ff45f4 ff4dfc 75ec 894df4 e9???????? 8b041a }
$sequence_6 = { c1c108 81e1ff00ff00 0bc1 89470c }
$sequence_7 = { eb00 85ff 0f84bd000000 4f 8bf0 }
$sequence_8 = { 83fe02 0f850d010000 8b4df0 eb00 894df8 85ff 0f84e7000000 }
$sequence_9 = { ff751c ff7518 ff7514 53 ff7510 ff7508 e8???????? }
condition:
7 of them and filesize < 425984
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 5f c1ee1f e9???????? 8b041a 8bc8 83c204 } | |
| $sequence_1 | hex | { 53 ff7510 ff7508 e8???????? 85c0 7502 b301 } | |
| $sequence_2 | hex | { 3bc3 7cf4 33f6 33d2 8bc6 f77514 } | |
| $sequence_3 | hex | { 81e1ff00ff00 0bc1 89470c 5f } | |
| $sequence_4 | hex | { 894dfc 85ff 7459 4f 8bf0 } | |
| $sequence_5 | hex | { ff45f4 ff4dfc 75ec 894df4 e9???????? 8b041a } | |
| $sequence_6 | hex | { c1c108 81e1ff00ff00 0bc1 89470c } | |
| $sequence_7 | hex | { eb00 85ff 0f84bd000000 4f 8bf0 } | |
| $sequence_8 | hex | { 83fe02 0f850d010000 8b4df0 eb00 894df8 85ff 0f84e7000000 } | |
| $sequence_9 | hex | { ff751c ff7518 ff7514 53 ff7510 ff7508 e8???????? } |
Condition
7 of them and filesize < 425984In plain words (Heuristic)
- The file must be smaller than 425984 (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: 8b64add5-ff03-5fa0-9d49-9279e42d139e
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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