YARA · Malpedia signator rules
MALPEDIA_Win_Archer_Rat_Auto
autogenerated rule brought to you by yara-signator
MalwareArcher 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: Archer Rat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-archer-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Archer_Rat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "9837935a-6948-55bc-923a-16560db69193"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.archer_rat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.archer_rat_auto.yar#L1-L134"
= "N/A"
= "ae7af025c04aff01e3d2f0dd3c48a68d6dd407caa219f0bf97beb5b3d7883a05"
= 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 = { ff5028 e8???????? 41c6460800 84db 0f8433040000 e8???????? 41b701 }
$sequence_1 = { e9???????? 488bbc2420020000 488b9c2428020000 488d8c2420060000 e8???????? 4885db 7408 }
$sequence_2 = { 7344 4989c7 4989d4 418a2c1e 48ffc3 4c8d0d26780c00 4c89f1 }
$sequence_3 = { e9???????? 56 4883ec20 0fb68118050000 4883f805 0f87e8000000 4889ce }
$sequence_4 = { ff5018 4883661000 4883c420 5e c3 56 57 }
$sequence_5 = { f3a4 488d942438040000 488dbc24a0030000 448a4a08 488db42470010000 4889f1 4989f8 }
$sequence_6 = { e8???????? 418a07 3c02 756b 4c8d7c2458 4c89f9 4889da }
$sequence_7 = { f30f7f84242c0b0000 660f7f8424200b0000 6a20 5a b900040000 e8???????? 4889842400030000 }
$sequence_8 = { 4c8d0533720600 4c89442420 4989c0 eb22 498b08 498b5008 4c8d054b720600 }
$sequence_9 = { ebec 4883c428 5f 5e c3 80792002 0f85d5280200 }
condition:
7 of them and filesize < 2612224
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { ff5028 e8???????? 41c6460800 84db 0f8433040000 e8???????? 41b701 } | |
| $sequence_1 | hex | { e9???????? 488bbc2420020000 488b9c2428020000 488d8c2420060000 e8???????? 4885db 7408 } | |
| $sequence_2 | hex | { 7344 4989c7 4989d4 418a2c1e 48ffc3 4c8d0d26780c00 4c89f1 } | |
| $sequence_3 | hex | { e9???????? 56 4883ec20 0fb68118050000 4883f805 0f87e8000000 4889ce } | |
| $sequence_4 | hex | { ff5018 4883661000 4883c420 5e c3 56 57 } | |
| $sequence_5 | hex | { f3a4 488d942438040000 488dbc24a0030000 448a4a08 488db42470010000 4889f1 4989f8 } | |
| $sequence_6 | hex | { e8???????? 418a07 3c02 756b 4c8d7c2458 4c89f9 4889da } | |
| $sequence_7 | hex | { f30f7f84242c0b0000 660f7f8424200b0000 6a20 5a b900040000 e8???????? 4889842400030000 } | |
| $sequence_8 | hex | { 4c8d0533720600 4c89442420 4989c0 eb22 498b08 498b5008 4c8d054b720600 } | |
| $sequence_9 | hex | { ebec 4883c428 5f 5e c3 80792002 0f85d5280200 } |
Condition
7 of them and filesize < 2612224In plain words (Heuristic)
- The file must be smaller than 2612224 (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: 9837935a-6948-55bc-923a-16560db69193
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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