Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Cobint_Auto

autogenerated rule brought to you by yara-signator

MalwareCobintMalpedia 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 / 73

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Cobint.

It defines 24 patterns (0 text, 24 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-cobint-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Cobint_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "176f9656-ccf8-5373-bb9f-f7003f6b4f18"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cobint"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.cobint_auto.yar#L1-L247"
		license_url = "N/A"
		logic_hash = "13d0a835e19ad70ae9fdaf4f7411cafe43dffff4c68466ea694ae99d6e4c9c12"
		score = 75
		quality = 73
		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 = { 8b4508 8945e8 85c0 7470 2175fc }
		$sequence_1 = { c3 55 8bec 8a4d0c 56 8b7508 880e }
		$sequence_2 = { 55 8bec 836d0c01 7507 6a00 }
		$sequence_3 = { 8b7d10 57 e8???????? 57 ff750c }
		$sequence_4 = { 8b0d???????? a1???????? 893cc1 a1???????? 8b0d???????? 8974c804 }
		$sequence_5 = { c745f404000000 50 8d4508 50 }
		$sequence_6 = { 56 ff15???????? 85c0 7412 814d0880330000 8d4508 }
		$sequence_7 = { 8b7d08 6a40 6800300000 ff7708 }
		$sequence_8 = { 8a45ec 8802 eb0b 8b4d08 034df0 8a55ed 8811 }
		$sequence_9 = { e10b 96 7c90 90 }
		$sequence_10 = { 7505 b301 885dff 84db 0f8477fdffff 5f 5e }
		$sequence_11 = { c3 31b7807c30ae 807c909090 90 bdfd807c90 90 90 }
		$sequence_12 = { 90 bffc807c28 1a807c170e81 7cd7 9b 807c909090 90 }
		$sequence_13 = { 8b7228 8bf8 663906 742c 33db 8a06 }
		$sequence_14 = { 740d 8b5508 0355f0 8a45ec 8802 eb0b }
		$sequence_15 = { 885dff 8d45d0 c745d090010000 50 8d8524feffff 50 }
		$sequence_16 = { 90 90 749b 807ce19a80 7c90 90 90 }
		$sequence_17 = { 51 51 51 8d8524feffff }
		$sequence_18 = { 8b12 85d2 75c4 eb03 8b4210 ba2d5f6af8 8945e0 }
		$sequence_19 = { 8b75e4 ff75d8 ffd6 8a5dff eb03 8b75e4 ff75d4 }
		$sequence_20 = { e8???????? 58 83c005 c3 31b7807c30ae 807c909090 }
		$sequence_21 = { 8bc8 e8???????? 8d9524feffff 8945cc }
		$sequence_22 = { 8bdf 890496 8bf9 8b45e8 42 c1e802 3bd0 }
		$sequence_23 = { bdfd807c90 90 90 90 90 90 90 }

	condition:
		7 of them and filesize < 65536
}

Strings (24 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b4508 8945e8 85c0 7470 2175fc }
$sequence_1hex{ c3 55 8bec 8a4d0c 56 8b7508 880e }
$sequence_2hex{ 55 8bec 836d0c01 7507 6a00 }
$sequence_3hex{ 8b7d10 57 e8???????? 57 ff750c }
$sequence_4hex{ 8b0d???????? a1???????? 893cc1 a1???????? 8b0d???????? 8974c804 }
$sequence_5hex{ c745f404000000 50 8d4508 50 }
$sequence_6hex{ 56 ff15???????? 85c0 7412 814d0880330000 8d4508 }
$sequence_7hex{ 8b7d08 6a40 6800300000 ff7708 }
$sequence_8hex{ 8a45ec 8802 eb0b 8b4d08 034df0 8a55ed 8811 }
$sequence_9hex{ e10b 96 7c90 90 }
$sequence_10hex{ 7505 b301 885dff 84db 0f8477fdffff 5f 5e }
$sequence_11hex{ c3 31b7807c30ae 807c909090 90 bdfd807c90 90 90 }
$sequence_12hex{ 90 bffc807c28 1a807c170e81 7cd7 9b 807c909090 90 }
$sequence_13hex{ 8b7228 8bf8 663906 742c 33db 8a06 }
$sequence_14hex{ 740d 8b5508 0355f0 8a45ec 8802 eb0b }
$sequence_15hex{ 885dff 8d45d0 c745d090010000 50 8d8524feffff 50 }
$sequence_16hex{ 90 90 749b 807ce19a80 7c90 90 90 }
$sequence_17hex{ 51 51 51 8d8524feffff }
$sequence_18hex{ 8b12 85d2 75c4 eb03 8b4210 ba2d5f6af8 8945e0 }
$sequence_19hex{ 8b75e4 ff75d8 ffd6 8a5dff eb03 8b75e4 ff75d4 }
$sequence_20hex{ e8???????? 58 83c005 c3 31b7807c30ae 807c909090 }
$sequence_21hex{ 8bc8 e8???????? 8d9524feffff 8945cc }
$sequence_22hex{ 8bdf 890496 8bf9 8b45e8 42 c1e802 3bd0 }
$sequence_23hex{ bdfd807c90 90 90 90 90 90 90 }

Condition

7 of them and filesize < 65536

In plain words (Heuristic)

  • The file must be smaller than 65536 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

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: 176f9656-ccf8-5373-bb9f-f7003f6b4f18

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