YARA · Malpedia signator rules
MALPEDIA_Win_Avzhan_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: Avzhan.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-avzhan-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Avzhan_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "5b8494e0-2006-59e5-baef-c4ea2a52d6bd"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.avzhan"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.avzhan_auto.yar#L1-L122"
= "N/A"
= "f6e23c8e08058a67326cfea3b28e1c9952733accb0c67143c3d4c383f7bc3a04"
= 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 = { 6a00 6a00 8d8c2418020000 6a00 }
$sequence_1 = { e8???????? 83c404 50 e8???????? 8bf0 8dbc2404020000 83c9ff }
$sequence_2 = { 8d542468 51 8d842484010000 52 50 8d8c240c020000 68???????? }
$sequence_3 = { 8b3d???????? 833d????????01 7418 6a00 }
$sequence_4 = { 83c408 8bc2 c1e010 668bc2 }
$sequence_5 = { 66c74424500000 3935???????? 743c 8d542410 8d442420 52 50 }
$sequence_6 = { ffd5 85c0 7410 68d0070000 ffd7 6a00 8b542414 }
$sequence_7 = { 8bc3 83c408 c1e010 668bc3 8b1d???????? c1e902 }
$sequence_8 = { 56 e8???????? 83c404 85c0 741e 8d442464 8d4c2464 }
$sequence_9 = { 85c0 741e 8d442464 8d4c2464 50 }
condition:
7 of them and filesize < 122880
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6a00 6a00 8d8c2418020000 6a00 } | |
| $sequence_1 | hex | { e8???????? 83c404 50 e8???????? 8bf0 8dbc2404020000 83c9ff } | |
| $sequence_2 | hex | { 8d542468 51 8d842484010000 52 50 8d8c240c020000 68???????? } | |
| $sequence_3 | hex | { 8b3d???????? 833d????????01 7418 6a00 } | |
| $sequence_4 | hex | { 83c408 8bc2 c1e010 668bc2 } | |
| $sequence_5 | hex | { 66c74424500000 3935???????? 743c 8d542410 8d442420 52 50 } | |
| $sequence_6 | hex | { ffd5 85c0 7410 68d0070000 ffd7 6a00 8b542414 } | |
| $sequence_7 | hex | { 8bc3 83c408 c1e010 668bc3 8b1d???????? c1e902 } | |
| $sequence_8 | hex | { 56 e8???????? 83c404 85c0 741e 8d442464 8d4c2464 } | |
| $sequence_9 | hex | { 85c0 741e 8d442464 8d4c2464 50 } |
Condition
7 of them and filesize < 122880In plain words (Heuristic)
- The file must be smaller than 122880 (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: 5b8494e0-2006-59e5-baef-c4ea2a52d6bd
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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