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MALPEDIA_Win_Orcarat_Auto

autogenerated rule brought to you by yara-signator

MalwareOrcaratMalpedia 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: Orcarat.

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

Summary generated from the rule's metadata and condition.

Rule source

win-orcarat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Orcarat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "04f42415-7fcb-5efc-9ffe-e9c2ead1bdb6"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.orcarat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.orcarat_auto.yar#L1-L123"
		license_url = "N/A"
		logic_hash = "94c36648eb707ecafb5b03dd70ef0419078170d69bed84996d811c45ff7795a7"
		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 = { 8d442420 52 50 6a01 8bcf e8???????? 85c0 }
		$sequence_1 = { 8d8424405a0000 52 50 a1???????? 8d8c2438020000 }
		$sequence_2 = { 52 f3a4 8d7c2424 83c9ff f2ae f7d1 8d842428050000 }
		$sequence_3 = { f7d1 2bf9 8d54241c 8bc1 8bf7 8bfa c1e902 }
		$sequence_4 = { 2bf1 56 52 50 e8???????? 8b84242c500000 }
		$sequence_5 = { c3 ff25???????? 55 8bec 837d100a }
		$sequence_6 = { c6043000 8b4324 85c0 7451 }
		$sequence_7 = { 51 52 6813000020 56 c744242801000000 c744243404000000 }
		$sequence_8 = { 8b442410 85c0 7661 c68404240c000000 8d8424240c0000 6a00 50 }
		$sequence_9 = { 89bbfc020000 8b834c030000 3bc7 7409 50 }

	condition:
		7 of them and filesize < 114688
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8d442420 52 50 6a01 8bcf e8???????? 85c0 }
$sequence_1hex{ 8d8424405a0000 52 50 a1???????? 8d8c2438020000 }
$sequence_2hex{ 52 f3a4 8d7c2424 83c9ff f2ae f7d1 8d842428050000 }
$sequence_3hex{ f7d1 2bf9 8d54241c 8bc1 8bf7 8bfa c1e902 }
$sequence_4hex{ 2bf1 56 52 50 e8???????? 8b84242c500000 }
$sequence_5hex{ c3 ff25???????? 55 8bec 837d100a }
$sequence_6hex{ c6043000 8b4324 85c0 7451 }
$sequence_7hex{ 51 52 6813000020 56 c744242801000000 c744243404000000 }
$sequence_8hex{ 8b442410 85c0 7661 c68404240c000000 8d8424240c0000 6a00 50 }
$sequence_9hex{ 89bbfc020000 8b834c030000 3bc7 7409 50 }

Condition

7 of them and filesize < 114688

In plain words (Heuristic)

  • The file must be smaller than 114688 (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: 04f42415-7fcb-5efc-9ffe-e9c2ead1bdb6

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