YARA · Malpedia signator rules
MALPEDIA_Win_Zeroaccess_Auto
autogenerated rule brought to you by yara-signator
MalwareZeroaccessMalpedia 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: Zeroaccess.
It defines 14 patterns (0 text, 14 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-zeroaccess-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zeroaccess_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d6895c5d-03b4-5482-a225-c716497077e5"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.zeroaccess"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zeroaccess_auto.yar#L1-L144"
= "N/A"
= "e144ce8260c81dad853ba3565e71a072be1e883cbcc3648a4cb072052ebb1362"
= 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 = { 85c0 7408 ff15???????? eb02 }
$sequence_1 = { 56 68???????? 50 8d460c 50 }
$sequence_2 = { 6a01 8d45f4 50 ff7308 ff15???????? 85c0 7408 }
$sequence_3 = { 33c0 48 83c9ff c744242804000000 48 }
$sequence_4 = { 56 6a10 8945e8 8d45e4 50 }
$sequence_5 = { 68???????? 68060000c8 ff7708 ff15???????? 85c0 }
$sequence_6 = { 50 68???????? 6889001200 8d45fc }
$sequence_7 = { 68???????? 68060000c8 ff7308 ff15???????? }
$sequence_8 = { 740c bf03000040 eb05 bf010000c0 85ff }
$sequence_9 = { 3bc1 7604 83c8ff c3 }
$sequence_10 = { ff15???????? 85c0 7407 b8e3030000 }
$sequence_11 = { 7e29 41 8d5001 41 8bc0 }
$sequence_12 = { 85c0 753d 8175bb01010101 48 8d4de7 }
$sequence_13 = { fec1 45 0fb6c1 47 021418 43 }
condition:
7 of them and filesize < 464896
}
Strings (14 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 85c0 7408 ff15???????? eb02 } | |
| $sequence_1 | hex | { 56 68???????? 50 8d460c 50 } | |
| $sequence_2 | hex | { 6a01 8d45f4 50 ff7308 ff15???????? 85c0 7408 } | |
| $sequence_3 | hex | { 33c0 48 83c9ff c744242804000000 48 } | |
| $sequence_4 | hex | { 56 6a10 8945e8 8d45e4 50 } | |
| $sequence_5 | hex | { 68???????? 68060000c8 ff7708 ff15???????? 85c0 } | |
| $sequence_6 | hex | { 50 68???????? 6889001200 8d45fc } | |
| $sequence_7 | hex | { 68???????? 68060000c8 ff7308 ff15???????? } | |
| $sequence_8 | hex | { 740c bf03000040 eb05 bf010000c0 85ff } | |
| $sequence_9 | hex | { 3bc1 7604 83c8ff c3 } | |
| $sequence_10 | hex | { ff15???????? 85c0 7407 b8e3030000 } | |
| $sequence_11 | hex | { 7e29 41 8d5001 41 8bc0 } | |
| $sequence_12 | hex | { 85c0 753d 8175bb01010101 48 8d4de7 } | |
| $sequence_13 | hex | { fec1 45 0fb6c1 47 021418 43 } |
Condition
7 of them and filesize < 464896In plain words (Heuristic)
- The file must be smaller than 464896 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
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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: d6895c5d-03b4-5482-a225-c716497077e5
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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