YARA · Malpedia signator rules
MALPEDIA_Win_Wastedloader_Auto
autogenerated rule brought to you by yara-signator
MalwareWastedloaderMalpedia 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: Wastedloader.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-wastedloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Wastedloader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "77a2ade8-76ac-5489-9bb2-292337810980"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.wastedloader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.wastedloader_auto.yar#L1-L125"
= "N/A"
= "9f8caca5f314d306a16416a35fd4a4839e75a98e2820acfdeaabd9b8b5446868"
= 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 = { 8b4df8 0fb75156 83ea54 8b45f8 66895056 b9b8000000 }
$sequence_1 = { e74d b980344b51 7385 20e1 }
$sequence_2 = { 1008 a6 660f1b09 0000 a7 7280 011cfd80edc199 }
$sequence_3 = { 04ee 1dd1704c64 0ffda4e83d005d04 008b4c81d274 }
$sequence_4 = { 98 fc b54c 90 b182 7c80 }
$sequence_5 = { 6a3b 11c2 855cb412 8bb8181480c8 1808 007056 8b4c00f9 }
$sequence_6 = { 037fc1 00e4 1ac7 7240 ad 58 2448 }
$sequence_7 = { 6ac1 8b700b 2c85 a5 5b df8bd2687320 ef }
$sequence_8 = { 2430 8b1c24 a1???????? b6f6 ff4565 f9 }
$sequence_9 = { 1c34 83f4f0 0d844de3fd ff959ef9ff7b f34a 24f0 801abd }
condition:
7 of them and filesize < 2677760
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8b4df8 0fb75156 83ea54 8b45f8 66895056 b9b8000000 } | |
| $sequence_1 | hex | { e74d b980344b51 7385 20e1 } | |
| $sequence_2 | hex | { 1008 a6 660f1b09 0000 a7 7280 011cfd80edc199 } | |
| $sequence_3 | hex | { 04ee 1dd1704c64 0ffda4e83d005d04 008b4c81d274 } | |
| $sequence_4 | hex | { 98 fc b54c 90 b182 7c80 } | |
| $sequence_5 | hex | { 6a3b 11c2 855cb412 8bb8181480c8 1808 007056 8b4c00f9 } | |
| $sequence_6 | hex | { 037fc1 00e4 1ac7 7240 ad 58 2448 } | |
| $sequence_7 | hex | { 6ac1 8b700b 2c85 a5 5b df8bd2687320 ef } | |
| $sequence_8 | hex | { 2430 8b1c24 a1???????? b6f6 ff4565 f9 } | |
| $sequence_9 | hex | { 1c34 83f4f0 0d844de3fd ff959ef9ff7b f34a 24f0 801abd } |
Condition
7 of them and filesize < 2677760In plain words (Heuristic)
- The file must be smaller than 2677760 (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: 77a2ade8-76ac-5489-9bb2-292337810980
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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