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MALPEDIA_Win_Cohhoc_Auto

autogenerated rule brought to you by yara-signator

MalwareCohhocMalpedia 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: Cohhoc.

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

Summary generated from the rule's metadata and condition.

Rule source

win-cohhoc-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Cohhoc_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "31c35e17-4ef0-5ab8-a1be-c805b263c882"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cohhoc"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.cohhoc_auto.yar#L1-L121"
		license_url = "N/A"
		logic_hash = "910ea9f36b7ea4043b73c78a4c4c5d942f52600457e380ccbdfc5af90ccf4ad1"
		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 = { 50 6804010000 ff15???????? 8b8c240c010000 8d542404 51 6a00 }
		$sequence_1 = { 83e103 f3a4 8b4c241c 03c8 894c241c 8b4c2420 e8???????? }
		$sequence_2 = { c705????????01000000 c705????????84000000 891d???????? 891d???????? }
		$sequence_3 = { f3ab 8b436c 33f6 3bc6 c744241401000000 }
		$sequence_4 = { 6804010000 ff15???????? 8b8c240c010000 8d542404 }
		$sequence_5 = { 75dc 33c0 eb05 1bc0 83d8ff 85c0 0f84ba000000 }
		$sequence_6 = { 8dbc2468010000 33c0 8d542420 f2ae f7d1 2bf9 }
		$sequence_7 = { 8b442408 8bc8 80e107 f6d9 1bc9 }
		$sequence_8 = { 57 6a0f ff15???????? 8b4c2458 8bf8 8d442414 50 }
		$sequence_9 = { 83e203 c1f904 83e10f c1e204 8d4c0c10 }

	condition:
		7 of them and filesize < 253952
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 50 6804010000 ff15???????? 8b8c240c010000 8d542404 51 6a00 }
$sequence_1hex{ 83e103 f3a4 8b4c241c 03c8 894c241c 8b4c2420 e8???????? }
$sequence_2hex{ c705????????01000000 c705????????84000000 891d???????? 891d???????? }
$sequence_3hex{ f3ab 8b436c 33f6 3bc6 c744241401000000 }
$sequence_4hex{ 6804010000 ff15???????? 8b8c240c010000 8d542404 }
$sequence_5hex{ 75dc 33c0 eb05 1bc0 83d8ff 85c0 0f84ba000000 }
$sequence_6hex{ 8dbc2468010000 33c0 8d542420 f2ae f7d1 2bf9 }
$sequence_7hex{ 8b442408 8bc8 80e107 f6d9 1bc9 }
$sequence_8hex{ 57 6a0f ff15???????? 8b4c2458 8bf8 8d442414 50 }
$sequence_9hex{ 83e203 c1f904 83e10f c1e204 8d4c0c10 }

Condition

7 of them and filesize < 253952

In plain words (Heuristic)

  • The file must be smaller than 253952 (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: 31c35e17-4ef0-5ab8-a1be-c805b263c882

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