YARA · Malpedia signator rules
MALPEDIA_Win_Xpertrat_Auto
autogenerated rule brought to you by yara-signator
MalwareXpertratMalpedia 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: Xpertrat.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-xpertrat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Xpertrat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "ba3a6b4f-dabd-5198-a8f0-bcecdc7a8cd1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.xpertrat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.xpertrat_auto.yar#L1-L159"
= "N/A"
= "46ada561a557d5653f02082143df27ce692fd4a3b6839f44225d1aa292544237"
= 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 = { ff08 40 0430 ff0a 4c 000c00 }
$sequence_1 = { 008a3800cc1c 5e 006c70ff 0808 008f38001b26 001b 0d002a2364 }
$sequence_2 = { 001b 0d002a2364 ff08 0800 }
$sequence_3 = { ff05???????? 000d???????? 0878ff 0d98000700 6e 74ff }
$sequence_4 = { 000d???????? 0870ff 0d80000700 0474 ff0478 }
$sequence_5 = { 0000 ae 045c ff4d40 ff08 40 }
$sequence_6 = { 0000 00a1cc004400 0bc0 7402 }
$sequence_7 = { 6c 70ff 0808 008a3800cc1c }
$sequence_8 = { ff15???????? 83bbd800000001 8d83fc000000 898534f6ffff }
$sequence_9 = { ff15???????? 83bd1cffffff00 7505 e9???????? }
$sequence_10 = { ff15???????? 83bd8cfeffff00 0f84b0050000 c745fc0a000000 }
$sequence_11 = { ff15???????? 83bd8cfeffff00 7405 e9???????? }
$sequence_12 = { ff15???????? 83bd70ffffff00 0f84ca010000 c745fc1a000000 }
$sequence_13 = { ff15???????? 83bbd800000001 0f8546010000 8d4dd8 }
$sequence_14 = { ff15???????? 83bc24a000000005 7c0c 5f }
$sequence_15 = { ff15???????? 83bb9400000001 8d83b8000000 89853cf6ffff 8985b4fcffff c785acfcffff03400000 0f8533010000 }
condition:
7 of them and filesize < 8560640
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { ff08 40 0430 ff0a 4c 000c00 } | |
| $sequence_1 | hex | { 008a3800cc1c 5e 006c70ff 0808 008f38001b26 001b 0d002a2364 } | |
| $sequence_2 | hex | { 001b 0d002a2364 ff08 0800 } | |
| $sequence_3 | hex | { ff05???????? 000d???????? 0878ff 0d98000700 6e 74ff } | |
| $sequence_4 | hex | { 000d???????? 0870ff 0d80000700 0474 ff0478 } | |
| $sequence_5 | hex | { 0000 ae 045c ff4d40 ff08 40 } | |
| $sequence_6 | hex | { 0000 00a1cc004400 0bc0 7402 } | |
| $sequence_7 | hex | { 6c 70ff 0808 008a3800cc1c } | |
| $sequence_8 | hex | { ff15???????? 83bbd800000001 8d83fc000000 898534f6ffff } | |
| $sequence_9 | hex | { ff15???????? 83bd1cffffff00 7505 e9???????? } | |
| $sequence_10 | hex | { ff15???????? 83bd8cfeffff00 0f84b0050000 c745fc0a000000 } | |
| $sequence_11 | hex | { ff15???????? 83bd8cfeffff00 7405 e9???????? } | |
| $sequence_12 | hex | { ff15???????? 83bd70ffffff00 0f84ca010000 c745fc1a000000 } | |
| $sequence_13 | hex | { ff15???????? 83bbd800000001 0f8546010000 8d4dd8 } | |
| $sequence_14 | hex | { ff15???????? 83bc24a000000005 7c0c 5f } | |
| $sequence_15 | hex | { ff15???????? 83bb9400000001 8d83b8000000 89853cf6ffff 8985b4fcffff c785acfcffff03400000 0f8533010000 } |
Condition
7 of them and filesize < 8560640In plain words (Heuristic)
- The file must be smaller than 8560640 (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: ba3a6b4f-dabd-5198-a8f0-bcecdc7a8cd1
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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