YARA · Malpedia signator rules
MALPEDIA_Win_Leash_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: Leash.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-leash-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Leash_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "35986a45-731e-5b33-8972-5a112dfc0fb1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.leash"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.leash_auto.yar#L1-L133"
= "N/A"
= "cbe363d95ef920a5a4c20a6b994434ecf799cc3c166f9de1e2837ac2d62aec2f"
= 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 = { 3bc8 8944241c 0f8ef5000000 85db c744244400000000 0f8eb4000000 8b7c2418 }
$sequence_1 = { f2ae f7d1 2bf9 8d95e0fdffff 8bc1 8bf7 8bfa }
$sequence_2 = { 8bfb 8b9c2424200000 c1e902 f3a5 8bc8 88542413 83e103 }
$sequence_3 = { 68???????? e8???????? 8d8c241c040000 51 6a10 68???????? }
$sequence_4 = { 53 e8???????? 83c41c eb04 8b742414 56 8bcb }
$sequence_5 = { 51 8d4db0 c645fc05 8975ec e8???????? 8d55d4 8bf8 }
$sequence_6 = { 8dbd9dd8ffff 889d9cd8ffff f3ab 66ab aa b9ff000000 33c0 }
$sequence_7 = { 8d8514fcffff 52 50 e8???????? 83c40c 8d4dec 8bf0 }
$sequence_8 = { 8b4c2414 8b7c2448 2bce 894c2448 8b4c2424 2bce 894c2430 }
$sequence_9 = { 85f6 0f8c97000000 8d4601 8d4dec 50 6a2e e8???????? }
condition:
7 of them and filesize < 761856
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 3bc8 8944241c 0f8ef5000000 85db c744244400000000 0f8eb4000000 8b7c2418 } | |
| $sequence_1 | hex | { f2ae f7d1 2bf9 8d95e0fdffff 8bc1 8bf7 8bfa } | |
| $sequence_2 | hex | { 8bfb 8b9c2424200000 c1e902 f3a5 8bc8 88542413 83e103 } | |
| $sequence_3 | hex | { 68???????? e8???????? 8d8c241c040000 51 6a10 68???????? } | |
| $sequence_4 | hex | { 53 e8???????? 83c41c eb04 8b742414 56 8bcb } | |
| $sequence_5 | hex | { 51 8d4db0 c645fc05 8975ec e8???????? 8d55d4 8bf8 } | |
| $sequence_6 | hex | { 8dbd9dd8ffff 889d9cd8ffff f3ab 66ab aa b9ff000000 33c0 } | |
| $sequence_7 | hex | { 8d8514fcffff 52 50 e8???????? 83c40c 8d4dec 8bf0 } | |
| $sequence_8 | hex | { 8b4c2414 8b7c2448 2bce 894c2448 8b4c2424 2bce 894c2430 } | |
| $sequence_9 | hex | { 85f6 0f8c97000000 8d4601 8d4dec 50 6a2e e8???????? } |
Condition
7 of them and filesize < 761856In plain words (Heuristic)
- The file must be smaller than 761856 (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: 35986a45-731e-5b33-8972-5a112dfc0fb1
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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