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MALPEDIA_Win_Zhcat_Auto

autogenerated rule brought to you by yara-signator

MalwareZhcatMalpedia 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: Zhcat.

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

Summary generated from the rule's metadata and condition.

Rule source

win-zhcat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zhcat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "6add86c9-ad70-50f2-9381-df2a0d1943c1"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.zhcat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zhcat_auto.yar#L1-L126"
		license_url = "N/A"
		logic_hash = "174068f088329bcd8e22ef60e4ede88a5db0c9b84fb2b1f343ce4990bc429798"
		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 = { 8bf9 eb02 33ff 8b45f0 8b1d???????? }
		$sequence_1 = { 03f3 56 57 ff7508 ff15???????? 57 8bf0 }
		$sequence_2 = { c705????????02000000 eb1c c605????????01 eb13 c705????????01000000 eb07 c605????????01 }
		$sequence_3 = { 894df8 8975f4 e8???????? 59 }
		$sequence_4 = { 6a00 ff75f0 ff15???????? 8945f8 ebde 33f6 68???????? }
		$sequence_5 = { 56 ff750c 68???????? 57 e8???????? 33f6 83c40c }
		$sequence_6 = { 8906 8d45fc 50 53 56 68???????? 53 }
		$sequence_7 = { ebe6 c745e0b0f14000 817de0b4f14000 7311 8b45e0 8b00 85c0 }
		$sequence_8 = { 8d45f8 8d5dfc e8???????? 59 }
		$sequence_9 = { 807e0a00 7534 803d????????00 742b 33c9 394d08 7e24 }

	condition:
		7 of them and filesize < 376832
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8bf9 eb02 33ff 8b45f0 8b1d???????? }
$sequence_1hex{ 03f3 56 57 ff7508 ff15???????? 57 8bf0 }
$sequence_2hex{ c705????????02000000 eb1c c605????????01 eb13 c705????????01000000 eb07 c605????????01 }
$sequence_3hex{ 894df8 8975f4 e8???????? 59 }
$sequence_4hex{ 6a00 ff75f0 ff15???????? 8945f8 ebde 33f6 68???????? }
$sequence_5hex{ 56 ff750c 68???????? 57 e8???????? 33f6 83c40c }
$sequence_6hex{ 8906 8d45fc 50 53 56 68???????? 53 }
$sequence_7hex{ ebe6 c745e0b0f14000 817de0b4f14000 7311 8b45e0 8b00 85c0 }
$sequence_8hex{ 8d45f8 8d5dfc e8???????? 59 }
$sequence_9hex{ 807e0a00 7534 803d????????00 742b 33c9 394d08 7e24 }

Condition

7 of them and filesize < 376832

In plain words (Heuristic)

  • The file must be smaller than 376832 (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: 6add86c9-ad70-50f2-9381-df2a0d1943c1

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