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MALPEDIA_Win_Vshell_Auto

autogenerated rule brought to you by yara-signator

MalwareVshellMalpedia 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: 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:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3332723f-406f-52de-a78b-40e7bfc7b267"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.vshell"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.vshell_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "131546b9263b4b6ad1aed326437388de895073eedea5b48b292e2dbc7e3ad8f5"
		score = 75
		quality = 75
		tags = "FILE"
		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"

	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)

IdentifierTypeValueModifiers
$sequence_0hex{ eb1c 4889c7 488b8c2430210000 e8???????? 488d3dd3929600 e8???????? e8???????? }
$sequence_1hex{ eb23 488b842488020000 488b9c2490020000 e8???????? eb0c e8???????? 0f1f8000000000 }
$sequence_2hex{ eb1c 4889c7 488b8c24e81c0000 e8???????? 488d3d6bb99600 e8???????? e8???????? }
$sequence_3hex{ eb1a 440fb64c3419 418d1411 8d5249 88543c19 4488443419 4883c002 }
$sequence_4hex{ ffd1 0f1f4000 4883f808 0f84e90d0000 488b8c2460010000 488b5170 488b842468010000 }
$sequence_5hex{ eb47 488d05fead5500 e8???????? 488b9424f8030000 48898ae0000000 833d????????00 7509 }
$sequence_6hex{ eb1c 4889c7 488b8c24b8220000 e8???????? 488d3d9b879600 e8???????? e8???????? }
$sequence_7hex{ ffd2 660f1f440000 4883f807 745f e8???????? 440f11bc24a0000000 488b4c2460 }
$sequence_8hex{ f3430f6f540420 f3430f6f5c0430 f3430f6f640500 f3430f6f6c0510 f3430f6f740520 f3430f6f7c0530 660fefc4 }
$sequence_9hex{ eb7f 48899c2438010000 4889442470 488d057d7b7f00 e8???????? 488b4c2470 488908 }

Condition

7 of them and filesize < 39452672

In 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.

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

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)

Original rule

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

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE