YARA · Malpedia signator rules
MALPEDIA_Win_Vshell_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: Vshell.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-vshell-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Vshell_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "3332723f-406f-52de-a78b-40e7bfc7b267"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.vshell"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.vshell_auto.yar#L1-L134"
= "N/A"
= "131546b9263b4b6ad1aed326437388de895073eedea5b48b292e2dbc7e3ad8f5"
= 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 = { eb1c 4889c7 488b8c2430210000 e8???????? 488d3dd3929600 e8???????? e8???????? }
$sequence_1 = { eb23 488b842488020000 488b9c2490020000 e8???????? eb0c e8???????? 0f1f8000000000 }
$sequence_2 = { eb1c 4889c7 488b8c24e81c0000 e8???????? 488d3d6bb99600 e8???????? e8???????? }
$sequence_3 = { eb1a 440fb64c3419 418d1411 8d5249 88543c19 4488443419 4883c002 }
$sequence_4 = { ffd1 0f1f4000 4883f808 0f84e90d0000 488b8c2460010000 488b5170 488b842468010000 }
$sequence_5 = { eb47 488d05fead5500 e8???????? 488b9424f8030000 48898ae0000000 833d????????00 7509 }
$sequence_6 = { eb1c 4889c7 488b8c24b8220000 e8???????? 488d3d9b879600 e8???????? e8???????? }
$sequence_7 = { ffd2 660f1f440000 4883f807 745f e8???????? 440f11bc24a0000000 488b4c2460 }
$sequence_8 = { f3430f6f540420 f3430f6f5c0430 f3430f6f640500 f3430f6f6c0510 f3430f6f740520 f3430f6f7c0530 660fefc4 }
$sequence_9 = { eb7f 48899c2438010000 4889442470 488d057d7b7f00 e8???????? 488b4c2470 488908 }
condition:
7 of them and filesize < 39452672
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { eb1c 4889c7 488b8c2430210000 e8???????? 488d3dd3929600 e8???????? e8???????? } | |
| $sequence_1 | hex | { eb23 488b842488020000 488b9c2490020000 e8???????? eb0c e8???????? 0f1f8000000000 } | |
| $sequence_2 | hex | { eb1c 4889c7 488b8c24e81c0000 e8???????? 488d3d6bb99600 e8???????? e8???????? } | |
| $sequence_3 | hex | { eb1a 440fb64c3419 418d1411 8d5249 88543c19 4488443419 4883c002 } | |
| $sequence_4 | hex | { ffd1 0f1f4000 4883f808 0f84e90d0000 488b8c2460010000 488b5170 488b842468010000 } | |
| $sequence_5 | hex | { eb47 488d05fead5500 e8???????? 488b9424f8030000 48898ae0000000 833d????????00 7509 } | |
| $sequence_6 | hex | { eb1c 4889c7 488b8c24b8220000 e8???????? 488d3d9b879600 e8???????? e8???????? } | |
| $sequence_7 | hex | { ffd2 660f1f440000 4883f807 745f e8???????? 440f11bc24a0000000 488b4c2460 } | |
| $sequence_8 | hex | { f3430f6f540420 f3430f6f5c0430 f3430f6f640500 f3430f6f6c0510 f3430f6f740520 f3430f6f7c0530 660fefc4 } | |
| $sequence_9 | hex | { eb7f 48899c2438010000 4889442470 488d057d7b7f00 e8???????? 488b4c2470 488908 } |
Condition
7 of them and filesize < 39452672In plain words (Heuristic)
- The file must be smaller than 39452672 (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: 3332723f-406f-52de-a78b-40e7bfc7b267
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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