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MALPEDIA_Win_Virdetdoor_Auto

autogenerated rule brought to you by yara-signator

MalwareVirdetdoorMalpedia 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: Virdetdoor.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-virdetdoor-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Virdetdoor_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c88d5f93-08a2-54dc-81ed-f298f4a96885"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.virdetdoor"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.virdetdoor_auto.yar#L1-L125"
		license_url = "N/A"
		logic_hash = "79443a6987dffba0f5b6f6b3f9ae30b6ccf78b546a1343b7d31d4f2653fcd4ab"
		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 = { eb05 7e0b 8d7eff 3bfb 7dd2 33c0 eb07 }
		$sequence_1 = { 8be5 5d c3 8bc7 ebf5 53 56 }
		$sequence_2 = { ff15???????? 8945f0 85c0 0f84a6000000 8b35???????? 8d480c }
		$sequence_3 = { 8365fc00 8db334020000 56 ffd7 8bbb30020000 }
		$sequence_4 = { e8???????? 8bf0 85f6 7422 6a18 6a00 56 }
		$sequence_5 = { 8d45e0 8975e0 50 e8???????? 8b55e0 59 8b4de4 }
		$sequence_6 = { 8d442424 50 8d442410 8bd7 }
		$sequence_7 = { eb43 33db 897df8 83fe28 7237 0fb74f04 83c6d8 }
		$sequence_8 = { 8b55e0 59 8b4de4 eb51 33f6 8bfb }
		$sequence_9 = { 8bcb e8???????? ff07 8b0f 8b55f8 }

	condition:
		7 of them and filesize < 106496
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ eb05 7e0b 8d7eff 3bfb 7dd2 33c0 eb07 }
$sequence_1hex{ 8be5 5d c3 8bc7 ebf5 53 56 }
$sequence_2hex{ ff15???????? 8945f0 85c0 0f84a6000000 8b35???????? 8d480c }
$sequence_3hex{ 8365fc00 8db334020000 56 ffd7 8bbb30020000 }
$sequence_4hex{ e8???????? 8bf0 85f6 7422 6a18 6a00 56 }
$sequence_5hex{ 8d45e0 8975e0 50 e8???????? 8b55e0 59 8b4de4 }
$sequence_6hex{ 8d442424 50 8d442410 8bd7 }
$sequence_7hex{ eb43 33db 897df8 83fe28 7237 0fb74f04 83c6d8 }
$sequence_8hex{ 8b55e0 59 8b4de4 eb51 33f6 8bfb }
$sequence_9hex{ 8bcb e8???????? ff07 8b0f 8b55f8 }

Condition

7 of them and filesize < 106496

In plain words (Heuristic)

  • The file must be smaller than 106496 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: c88d5f93-08a2-54dc-81ed-f298f4a96885

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