YARA · Malpedia signator rules
MALPEDIA_Win_8Base_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: 8Base.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-8base-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_8Base_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "c4b48847-5291-521d-93fb-9294f21140e6"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.8base"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.8base_auto.yar#L1-L119"
= "N/A"
= "b47a40948bded147073cdef65076e2a74aedf9d527ccdea9c267a440037e5b0f"
= 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 ff15???????? 8d8e04a2feff 81f98c230000 770b }
$sequence_1 = { 8b5104 8b4c2408 c74432f45c394000 5e }
$sequence_2 = { 8815???????? c605????????6f 880d???????? c605????????65 c605????????63 }
$sequence_3 = { 8d3485c0289100 8b06 83e71f c1e706 03c7 8a5824 }
$sequence_4 = { c684249c00000002 50 c7442410043a4000 e8???????? }
$sequence_5 = { d3ea 89542414 8b442434 01442414 8b442424 31442410 }
$sequence_6 = { ff15???????? 8b442414 40 3d???????? 89442414 0f8c0effffff 8b35???????? }
$sequence_7 = { 8bf7 83e61f c1e606 033485c0289100 c745e401000000 }
$sequence_8 = { 6689442416 33c9 668954241a 8d442434 50 66894c241c 8b4c241c }
$sequence_9 = { 899c24ac000000 3bfb 7449 8b8424b8000000 56 8d742418 }
condition:
7 of them and filesize < 10838016
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6a00 ff15???????? 8d8e04a2feff 81f98c230000 770b } | |
| $sequence_1 | hex | { 8b5104 8b4c2408 c74432f45c394000 5e } | |
| $sequence_2 | hex | { 8815???????? c605????????6f 880d???????? c605????????65 c605????????63 } | |
| $sequence_3 | hex | { 8d3485c0289100 8b06 83e71f c1e706 03c7 8a5824 } | |
| $sequence_4 | hex | { c684249c00000002 50 c7442410043a4000 e8???????? } | |
| $sequence_5 | hex | { d3ea 89542414 8b442434 01442414 8b442424 31442410 } | |
| $sequence_6 | hex | { ff15???????? 8b442414 40 3d???????? 89442414 0f8c0effffff 8b35???????? } | |
| $sequence_7 | hex | { 8bf7 83e61f c1e606 033485c0289100 c745e401000000 } | |
| $sequence_8 | hex | { 6689442416 33c9 668954241a 8d442434 50 66894c241c 8b4c241c } | |
| $sequence_9 | hex | { 899c24ac000000 3bfb 7449 8b8424b8000000 56 8d742418 } |
Condition
7 of them and filesize < 10838016In plain words (Heuristic)
- The file must be smaller than 10838016 (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.
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: c4b48847-5291-521d-93fb-9294f21140e6
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
Related rules
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04