YARA · Malpedia signator rules
MALPEDIA_Win_Portstarter_Auto
autogenerated rule brought to you by yara-signator
MalwarePortstarterMalpedia 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: Portstarter.
It defines 12 patterns (0 text, 12 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-portstarter-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Portstarter_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "0cb0de91-0f00-504b-b858-4628740872a9"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.portstarter"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.portstarter_auto.yar#L1-L134"
= "N/A"
= "3f78ba69db52b055c0289e4eb33d8701a119eb5c4a41f7ae830f18ba08059434"
= 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 = { e8???????? 488b7c2448 4c8b442430 c644247000 48c744247800000000 440f11bc2480000000 31c0 }
$sequence_1 = { e8???????? 488b542460 4c8ba42498000000 418b44d408 488b8c24e8000000 4839c1 0f863d030000 }
$sequence_2 = { e8???????? 488b542460 4c8ba42498000000 418b4cd408 488b9424c0000000 488b9c24c8000000 }
$sequence_3 = { e8???????? 4889d8 4889f1 e8???????? 4c89c8 }
$sequence_4 = { e8???????? 488b8c24a0000000 48894808 833d????????00 750d 488b942400010000 488910 }
$sequence_5 = { e8???????? 4889f7 488b4f08 833d????????00 }
$sequence_6 = { e8???????? 488b542418 488b7c2430 48895758 }
$sequence_7 = { e8???????? 488b7c2450 48894f10 833d????????00 6690 7505 488907 }
$sequence_8 = { 4863442430 486bc010 488d0de3061c00 4803c8 }
$sequence_9 = { 41b800de1b00 488d15d02f0000 488d4c2420 e8???????? }
$sequence_10 = { 488d0de3061c00 4803c8 488bc1 48634c2434 }
$sequence_11 = { 4883ec48 8b442458 89442424 48c744242800000000 41b800de1b00 }
condition:
7 of them and filesize < 14221312
}
Strings (12 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 488b7c2448 4c8b442430 c644247000 48c744247800000000 440f11bc2480000000 31c0 } | |
| $sequence_1 | hex | { e8???????? 488b542460 4c8ba42498000000 418b44d408 488b8c24e8000000 4839c1 0f863d030000 } | |
| $sequence_2 | hex | { e8???????? 488b542460 4c8ba42498000000 418b4cd408 488b9424c0000000 488b9c24c8000000 } | |
| $sequence_3 | hex | { e8???????? 4889d8 4889f1 e8???????? 4c89c8 } | |
| $sequence_4 | hex | { e8???????? 488b8c24a0000000 48894808 833d????????00 750d 488b942400010000 488910 } | |
| $sequence_5 | hex | { e8???????? 4889f7 488b4f08 833d????????00 } | |
| $sequence_6 | hex | { e8???????? 488b542418 488b7c2430 48895758 } | |
| $sequence_7 | hex | { e8???????? 488b7c2450 48894f10 833d????????00 6690 7505 488907 } | |
| $sequence_8 | hex | { 4863442430 486bc010 488d0de3061c00 4803c8 } | |
| $sequence_9 | hex | { 41b800de1b00 488d15d02f0000 488d4c2420 e8???????? } | |
| $sequence_10 | hex | { 488d0de3061c00 4803c8 488bc1 48634c2434 } | |
| $sequence_11 | hex | { 4883ec48 8b442458 89442424 48c744242800000000 41b800de1b00 } |
Condition
7 of them and filesize < 14221312In plain words (Heuristic)
- The file must be smaller than 14221312 (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: 0cb0de91-0f00-504b-b858-4628740872a9
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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