YARA · Malpedia signator rules
MALPEDIA_Win_Spider_Rat_Auto
autogenerated rule brought to you by yara-signator
MalwareSpider RatMalpedia 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: Spider Rat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-spider-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Spider_Rat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "b0d90359-2598-5519-ad5e-e2cd0ed58518"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.spider_rat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.spider_rat_auto.yar#L1-L131"
= "N/A"
= "b0533445a9bbea3abbfea008098be4356c285de1302cc31eddd214e7a9d0fb61"
= 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 = { 488b442440 83a0c8000000fd 33c0 eb1a 1bc0 83e002 ffc8 }
$sequence_1 = { 448d4201 e8???????? 4c8d0d7d60feff 4c8bd8 4b8b84f1e07a0700 4c895c3040 4b8b84f1e07a0700 }
$sequence_2 = { 5f c3 4053 4883ec20 83a12001000000 83a12401000000 488bd9 }
$sequence_3 = { 4889442428 33d2 33c9 897c2420 e8???????? 488983c0020000 }
$sequence_4 = { 498b00 488d153a400200 4c8d442438 498bc9 ff10 488b4c2438 4885c9 }
$sequence_5 = { 4885c9 7406 e8???????? 90 488d050720feff eb00 4883c420 }
$sequence_6 = { 0fb64308 488907 4903f8 eb1f 480fbe4308 }
$sequence_7 = { 5f c3 c60300 33c0 ebe4 e8???????? cc }
$sequence_8 = { ff15???????? 458d9c249a130000 4183fb12 0f8781070000 488d151a83fdff 4963c3 8b8c8290840200 }
$sequence_9 = { 4883a3f001000000 83a3f801000000 83a3fc01000000 4883a30802000000 488bcb e8???????? 89bb08010000 }
condition:
7 of them and filesize < 1107968
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 488b442440 83a0c8000000fd 33c0 eb1a 1bc0 83e002 ffc8 } | |
| $sequence_1 | hex | { 448d4201 e8???????? 4c8d0d7d60feff 4c8bd8 4b8b84f1e07a0700 4c895c3040 4b8b84f1e07a0700 } | |
| $sequence_2 | hex | { 5f c3 4053 4883ec20 83a12001000000 83a12401000000 488bd9 } | |
| $sequence_3 | hex | { 4889442428 33d2 33c9 897c2420 e8???????? 488983c0020000 } | |
| $sequence_4 | hex | { 498b00 488d153a400200 4c8d442438 498bc9 ff10 488b4c2438 4885c9 } | |
| $sequence_5 | hex | { 4885c9 7406 e8???????? 90 488d050720feff eb00 4883c420 } | |
| $sequence_6 | hex | { 0fb64308 488907 4903f8 eb1f 480fbe4308 } | |
| $sequence_7 | hex | { 5f c3 c60300 33c0 ebe4 e8???????? cc } | |
| $sequence_8 | hex | { ff15???????? 458d9c249a130000 4183fb12 0f8781070000 488d151a83fdff 4963c3 8b8c8290840200 } | |
| $sequence_9 | hex | { 4883a3f001000000 83a3f801000000 83a3fc01000000 4883a30802000000 488bcb e8???????? 89bb08010000 } |
Condition
7 of them and filesize < 1107968In plain words (Heuristic)
- The file must be smaller than 1107968 (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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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: b0d90359-2598-5519-ad5e-e2cd0ed58518
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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