YARA · Malpedia signator rules
MALPEDIA_Win_Dispenserxfs_Auto
autogenerated rule brought to you by yara-signator
MalwareDispenserxfsMalpedia 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: Dispenserxfs.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-dispenserxfs-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Dispenserxfs_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f5230e78-f9c8-536f-aec9-e20f575383e8"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.dispenserxfs"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.dispenserxfs_auto.yar#L1-L119"
= "N/A"
= "fe196789895dd63b4ce6f206a4a4e6b2b60ee03ffa80291c63416518d5fc66ee"
= 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 = { ff30 8d45c4 53 68???????? 6a1f 50 }
$sequence_1 = { 68ff0f0000 53 50 8bf1 889df8eeffff e8???????? 83c40c }
$sequence_2 = { 59 59 68e8030000 ff15???????? 4e }
$sequence_3 = { c785d0feffff55534420 c785d4feffff41555344 899dd8feffff 898ddcfeffff 898de0feffff 89b5e4feffff 89b5e8feffff }
$sequence_4 = { 8bf9 8845da 8d4dd8 668b4508 }
$sequence_5 = { 89b5c1fdffff c785c5fdffff48474000 c785c9fdffff55534420 c685cdfdffff42 }
$sequence_6 = { 731f 8b4230 0fb7cb 8b0488 }
$sequence_7 = { 8bf2 8a02 42 84c0 75f9 8dbdf8eeffff }
$sequence_8 = { 8d45fc 50 6860ea0000 8d45e4 50 6838010000 }
$sequence_9 = { 8b7d1c 8b5d18 59 57 53 ff7514 }
condition:
7 of them and filesize < 114688
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { ff30 8d45c4 53 68???????? 6a1f 50 } | |
| $sequence_1 | hex | { 68ff0f0000 53 50 8bf1 889df8eeffff e8???????? 83c40c } | |
| $sequence_2 | hex | { 59 59 68e8030000 ff15???????? 4e } | |
| $sequence_3 | hex | { c785d0feffff55534420 c785d4feffff41555344 899dd8feffff 898ddcfeffff 898de0feffff 89b5e4feffff 89b5e8feffff } | |
| $sequence_4 | hex | { 8bf9 8845da 8d4dd8 668b4508 } | |
| $sequence_5 | hex | { 89b5c1fdffff c785c5fdffff48474000 c785c9fdffff55534420 c685cdfdffff42 } | |
| $sequence_6 | hex | { 731f 8b4230 0fb7cb 8b0488 } | |
| $sequence_7 | hex | { 8bf2 8a02 42 84c0 75f9 8dbdf8eeffff } | |
| $sequence_8 | hex | { 8d45fc 50 6860ea0000 8d45e4 50 6838010000 } | |
| $sequence_9 | hex | { 8b7d1c 8b5d18 59 57 53 ff7514 } |
Condition
7 of them and filesize < 114688In plain words (Heuristic)
- The file must be smaller than 114688 (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: f5230e78-f9c8-536f-aec9-e20f575383e8
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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