YARA · Malpedia signator rules
MALPEDIA_Win_Xfsadm_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: Xfsadm.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-xfsadm-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Xfsadm_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "552d6194-4917-5d44-9757-a3d6f70fd0c0"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.xfsadm"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.xfsadm_auto.yar#L1-L125"
= "N/A"
= "0bd192351fc03846117b638fe2e0016827c857e0d506d55fb4904ab3035a6f66"
= 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 = { 84c9 7410 c60720 47 8a06 46 8807 }
$sequence_1 = { 8975cc 8975d0 8975e0 8d1c85fcffffff c745e4d8254200 }
$sequence_2 = { 6a00 ffd7 85c0 740c 6a00 6a00 }
$sequence_3 = { 6a26 58 0fb60c858e174200 0fb634858f174200 8bf9 8985b0f8ffff c1e702 }
$sequence_4 = { e8???????? 83c414 57 e8???????? a1???????? 83c404 }
$sequence_5 = { e8???????? 68f80f0000 8bf8 6a00 }
$sequence_6 = { 75d3 8b4d08 ff7718 6a00 51 8b4f04 6a0a }
$sequence_7 = { 57 6a00 6a00 6a00 6a00 6a00 680cfeffff }
$sequence_8 = { ff5008 8bd0 c702???????? 8b45fc 8b4d0c 894204 }
$sequence_9 = { c7463800000000 8d4608 c7463c00000000 c7464000000000 c7464400000000 c7464800000000 }
condition:
7 of them and filesize < 566272
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 84c9 7410 c60720 47 8a06 46 8807 } | |
| $sequence_1 | hex | { 8975cc 8975d0 8975e0 8d1c85fcffffff c745e4d8254200 } | |
| $sequence_2 | hex | { 6a00 ffd7 85c0 740c 6a00 6a00 } | |
| $sequence_3 | hex | { 6a26 58 0fb60c858e174200 0fb634858f174200 8bf9 8985b0f8ffff c1e702 } | |
| $sequence_4 | hex | { e8???????? 83c414 57 e8???????? a1???????? 83c404 } | |
| $sequence_5 | hex | { e8???????? 68f80f0000 8bf8 6a00 } | |
| $sequence_6 | hex | { 75d3 8b4d08 ff7718 6a00 51 8b4f04 6a0a } | |
| $sequence_7 | hex | { 57 6a00 6a00 6a00 6a00 6a00 680cfeffff } | |
| $sequence_8 | hex | { ff5008 8bd0 c702???????? 8b45fc 8b4d0c 894204 } | |
| $sequence_9 | hex | { c7463800000000 8d4608 c7463c00000000 c7464000000000 c7464400000000 c7464800000000 } |
Condition
7 of them and filesize < 566272In plain words (Heuristic)
- The file must be smaller than 566272 (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: 552d6194-4917-5d44-9757-a3d6f70fd0c0
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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