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MALPEDIA_Win_Alphanc_Auto

autogenerated rule brought to you by yara-signator

MalwareAlphancMalpedia 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: Alphanc.

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

Summary generated from the rule's metadata and condition.

Rule source

win-alphanc-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Alphanc_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "63c8da31-f973-5c7b-9594-c519a80fe95f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.alphanc"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.alphanc_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "2ecf03abfbcf914e091aa062990492cf80f3dc2af12440b4eca9248289748f21"
		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 = { 8f45f4 c745f80a000000 7e58 50 5a 4a 8915???????? }
		$sequence_1 = { b904000000 83e00f 8bd7 89442414 8b442434 c1e01c 89442430 }
		$sequence_2 = { c3 57 8bcb 8bf8 8bc1 46 c1e902 }
		$sequence_3 = { e8???????? 83c410 9b c745fc00000000 b909000000 33c0 8dbd5cfbffff }
		$sequence_4 = { 8b5c2418 55 bd01000000 8b4304 56 85c0 57 }
		$sequence_5 = { 8d1c85001c4f00 8b0485001c4f00 03c6 8a5004 f6c201 0f849e010000 8365f800 }
		$sequence_6 = { eb0a b912000000 be???????? 50 5f f3a5 bf24000000 }
		$sequence_7 = { 8b6c2414 3bee 7e02 8bee 8b442418 8bc8 8bd0 }
		$sequence_8 = { ebb3 7db1 68d7000000 68???????? 6888000000 6894000000 6a04 }
		$sequence_9 = { c744241c01000000 57 e8???????? 8b44241c 83c404 85c0 5d }

	condition:
		7 of them and filesize < 2015232
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8f45f4 c745f80a000000 7e58 50 5a 4a 8915???????? }
$sequence_1hex{ b904000000 83e00f 8bd7 89442414 8b442434 c1e01c 89442430 }
$sequence_2hex{ c3 57 8bcb 8bf8 8bc1 46 c1e902 }
$sequence_3hex{ e8???????? 83c410 9b c745fc00000000 b909000000 33c0 8dbd5cfbffff }
$sequence_4hex{ 8b5c2418 55 bd01000000 8b4304 56 85c0 57 }
$sequence_5hex{ 8d1c85001c4f00 8b0485001c4f00 03c6 8a5004 f6c201 0f849e010000 8365f800 }
$sequence_6hex{ eb0a b912000000 be???????? 50 5f f3a5 bf24000000 }
$sequence_7hex{ 8b6c2414 3bee 7e02 8bee 8b442418 8bc8 8bd0 }
$sequence_8hex{ ebb3 7db1 68d7000000 68???????? 6888000000 6894000000 6a04 }
$sequence_9hex{ c744241c01000000 57 e8???????? 8b44241c 83c404 85c0 5d }

Condition

7 of them and filesize < 2015232

In plain words (Heuristic)

  • The file must be smaller than 2015232 (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: 63c8da31-f973-5c7b-9594-c519a80fe95f

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