YARA · Malpedia signator rules
MALPEDIA_Win_Zhcat_Auto
autogenerated rule brought to you by yara-signator
- 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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "6add86c9-ad70-50f2-9381-df2a0d1943c1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.zhcat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zhcat_auto.yar#L1-L126"
= "N/A"
= "174068f088329bcd8e22ef60e4ede88a5db0c9b84fb2b1f343ce4990bc429798"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8bf9 eb02 33ff 8b45f0 8b1d???????? } | |
| $sequence_1 | hex | { 03f3 56 57 ff7508 ff15???????? 57 8bf0 } | |
| $sequence_2 | hex | { c705????????02000000 eb1c c605????????01 eb13 c705????????01000000 eb07 c605????????01 } | |
| $sequence_3 | hex | { 894df8 8975f4 e8???????? 59 } | |
| $sequence_4 | hex | { 6a00 ff75f0 ff15???????? 8945f8 ebde 33f6 68???????? } | |
| $sequence_5 | hex | { 56 ff750c 68???????? 57 e8???????? 33f6 83c40c } | |
| $sequence_6 | hex | { 8906 8d45fc 50 53 56 68???????? 53 } | |
| $sequence_7 | hex | { ebe6 c745e0b0f14000 817de0b4f14000 7311 8b45e0 8b00 85c0 } | |
| $sequence_8 | hex | { 8d45f8 8d5dfc e8???????? 59 } | |
| $sequence_9 | hex | { 807e0a00 7534 803d????????00 742b 33c9 394d08 7e24 } |
Condition
7 of them and filesize < 376832In 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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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)
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
| 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 |
Tags:FILE
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