YARA · Malpedia signator rules
MALPEDIA_Win_Earthworm_Auto
autogenerated rule brought to you by yara-signator
MalwareEarthwormMalpedia 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: Earthworm.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-earthworm-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Earthworm_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f464d0d5-2848-5f1d-b0da-be4baede011b"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.earthworm"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.earthworm_auto.yar#L1-L134"
= "N/A"
= "7914f56bbea8d8d38e0c4986096d097094f54727a3ceb9106fff83fd37dd59b4"
= 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 = { 41b99a010000 4c8d0543500500 ba02000000 b928020000 e8???????? 488bd0 488d4c2420 }
$sequence_1 = { 837c243800 753a 488d057c2a0c00 4889442428 488d0578980b00 4889442420 4533c9 }
$sequence_2 = { eb0f 488d05a5150a00 4889842480000000 488b842480000000 4889842488000000 48c744244800000000 48c744247800000000 }
$sequence_3 = { eba0 488b842498010000 488b4010 448b08 488b842498010000 4c8b4008 488d942428010000 }
$sequence_4 = { e8???????? eb1e 488d0de2680700 e8???????? eb10 488d0ddc680700 e8???????? }
$sequence_5 = { e8???????? 488bd0 488d8c24e0020000 e8???????? 90 e8???????? 85c0 }
$sequence_6 = { 488b942418090000 488d4c2428 e8???????? 90 8b442420 2500800000 85c0 }
$sequence_7 = { 488b4008 4889442430 488b442470 488b4008 488b00 488b4018 4889442428 }
$sequence_8 = { 753a 488d057fa60900 4889442428 488d05ab910900 4889442420 4533c9 41b884060000 }
$sequence_9 = { 89442424 488b442470 8b00 39442424 7d5b 8b442478 39442424 }
condition:
7 of them and filesize < 2659328
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 41b99a010000 4c8d0543500500 ba02000000 b928020000 e8???????? 488bd0 488d4c2420 } | |
| $sequence_1 | hex | { 837c243800 753a 488d057c2a0c00 4889442428 488d0578980b00 4889442420 4533c9 } | |
| $sequence_2 | hex | { eb0f 488d05a5150a00 4889842480000000 488b842480000000 4889842488000000 48c744244800000000 48c744247800000000 } | |
| $sequence_3 | hex | { eba0 488b842498010000 488b4010 448b08 488b842498010000 4c8b4008 488d942428010000 } | |
| $sequence_4 | hex | { e8???????? eb1e 488d0de2680700 e8???????? eb10 488d0ddc680700 e8???????? } | |
| $sequence_5 | hex | { e8???????? 488bd0 488d8c24e0020000 e8???????? 90 e8???????? 85c0 } | |
| $sequence_6 | hex | { 488b942418090000 488d4c2428 e8???????? 90 8b442420 2500800000 85c0 } | |
| $sequence_7 | hex | { 488b4008 4889442430 488b442470 488b4008 488b00 488b4018 4889442428 } | |
| $sequence_8 | hex | { 753a 488d057fa60900 4889442428 488d05ab910900 4889442420 4533c9 41b884060000 } | |
| $sequence_9 | hex | { 89442424 488b442470 8b00 39442424 7d5b 8b442478 39442424 } |
Condition
7 of them and filesize < 2659328In plain words (Heuristic)
- The file must be smaller than 2659328 (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: f464d0d5-2848-5f1d-b0da-be4baede011b
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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