YARA · Malpedia signator rules
MALPEDIA_Win_Xbtl_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: Xbtl.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-xbtl-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Xbtl_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d5db6d09-8688-5faa-abdc-b73ea6228856"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.xbtl"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.xbtl_auto.yar#L1-L129"
= "N/A"
= "aad1f1f8d12723332af110ebc73e31d06fe847b4b1035c93d8a971bc90e13960"
= 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 = { c1fa05 c1e006 030495e0c04200 eb05 b8???????? f6400420 7415 }
$sequence_1 = { 8b85b4feffff 8db4169979825a 8b95b8feffff c1c902 83c705 8bde }
$sequence_2 = { 6a00 6a03 6a00 6a01 6800000080 51 ffd3 }
$sequence_3 = { 85f6 0f8594000000 3df0ff1f00 730c 8bc8 83e10f be10000000 }
$sequence_4 = { 030495e0c04200 eb05 b8???????? f6400420 7415 53 6a00 }
$sequence_5 = { 7405 e8???????? ba01000000 895608 }
$sequence_6 = { 83c720 8945f0 3b45fc 7c87 bf00200000 33db }
$sequence_7 = { 8b45fc 894df4 8bf0 3bc1 7c6b 8b4708 3daa55ff7f }
$sequence_8 = { 53 57 8bf8 8bd9 85ff 743a 8d9b00000000 }
$sequence_9 = { 6685c9 75f5 2bc2 6a00 d1f8 8d4dfc 51 }
condition:
7 of them and filesize < 401408
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c1fa05 c1e006 030495e0c04200 eb05 b8???????? f6400420 7415 } | |
| $sequence_1 | hex | { 8b85b4feffff 8db4169979825a 8b95b8feffff c1c902 83c705 8bde } | |
| $sequence_2 | hex | { 6a00 6a03 6a00 6a01 6800000080 51 ffd3 } | |
| $sequence_3 | hex | { 85f6 0f8594000000 3df0ff1f00 730c 8bc8 83e10f be10000000 } | |
| $sequence_4 | hex | { 030495e0c04200 eb05 b8???????? f6400420 7415 53 6a00 } | |
| $sequence_5 | hex | { 7405 e8???????? ba01000000 895608 } | |
| $sequence_6 | hex | { 83c720 8945f0 3b45fc 7c87 bf00200000 33db } | |
| $sequence_7 | hex | { 8b45fc 894df4 8bf0 3bc1 7c6b 8b4708 3daa55ff7f } | |
| $sequence_8 | hex | { 53 57 8bf8 8bd9 85ff 743a 8d9b00000000 } | |
| $sequence_9 | hex | { 6685c9 75f5 2bc2 6a00 d1f8 8d4dfc 51 } |
Condition
7 of them and filesize < 401408In plain words (Heuristic)
- The file must be smaller than 401408 (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: d5db6d09-8688-5faa-abdc-b73ea6228856
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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