YARA · Malpedia signator rules
MALPEDIA_Win_Pirpi_Auto
autogenerated rule brought to you by yara-signator
- 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: Pirpi.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-pirpi-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Pirpi_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "7181ea42-e19a-5e12-ba7b-9d6b1e35ab43"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.pirpi"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.pirpi_auto.yar#L1-L119"
= "N/A"
= "72a48ba0aba5945f7b53e0e1d7a9142f3ecdcec0fff3d84436ae9e1c918d7370"
= 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 = { b802000000 890e 5f 5e 5b 8be5 5d }
$sequence_1 = { f3a4 8b4d10 8d5408ff 8955f4 }
$sequence_2 = { 4f 41 3bca 897df4 7ce2 }
$sequence_3 = { c0e104 0ad1 8a4c2416 8856fb 8a542415 }
$sequence_4 = { c20400 53 55 57 8d7e18 b926120000 33c0 }
$sequence_5 = { 56 f3ab 8d44241c 68???????? 50 c744241c00000000 c744242002000000 }
$sequence_6 = { 8b442404 81ec44010000 57 33ff 85c0 }
$sequence_7 = { 3bc7 8901 761f 5f }
$sequence_8 = { 8bca be90000000 99 f7fe 895c2408 894c240c }
$sequence_9 = { 8b8324200000 5f 40 5e 898324200000 }
condition:
7 of them and filesize < 327680
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { b802000000 890e 5f 5e 5b 8be5 5d } | |
| $sequence_1 | hex | { f3a4 8b4d10 8d5408ff 8955f4 } | |
| $sequence_2 | hex | { 4f 41 3bca 897df4 7ce2 } | |
| $sequence_3 | hex | { c0e104 0ad1 8a4c2416 8856fb 8a542415 } | |
| $sequence_4 | hex | { c20400 53 55 57 8d7e18 b926120000 33c0 } | |
| $sequence_5 | hex | { 56 f3ab 8d44241c 68???????? 50 c744241c00000000 c744242002000000 } | |
| $sequence_6 | hex | { 8b442404 81ec44010000 57 33ff 85c0 } | |
| $sequence_7 | hex | { 3bc7 8901 761f 5f } | |
| $sequence_8 | hex | { 8bca be90000000 99 f7fe 895c2408 894c240c } | |
| $sequence_9 | hex | { 8b8324200000 5f 40 5e 898324200000 } |
Condition
7 of them and filesize < 327680In plain words (Heuristic)
- The file must be smaller than 327680 (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: 7181ea42-e19a-5e12-ba7b-9d6b1e35ab43
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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