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MALPEDIA_Win_Pirpi_Auto

autogenerated rule brought to you by yara-signator

MalwarePirpiMalpedia 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: 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:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "7181ea42-e19a-5e12-ba7b-9d6b1e35ab43"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.pirpi"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.pirpi_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "72a48ba0aba5945f7b53e0e1d7a9142f3ecdcec0fff3d84436ae9e1c918d7370"
		score = 75
		quality = 75
		tags = "FILE"
		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"

	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)

IdentifierTypeValueModifiers
$sequence_0hex{ b802000000 890e 5f 5e 5b 8be5 5d }
$sequence_1hex{ f3a4 8b4d10 8d5408ff 8955f4 }
$sequence_2hex{ 4f 41 3bca 897df4 7ce2 }
$sequence_3hex{ c0e104 0ad1 8a4c2416 8856fb 8a542415 }
$sequence_4hex{ c20400 53 55 57 8d7e18 b926120000 33c0 }
$sequence_5hex{ 56 f3ab 8d44241c 68???????? 50 c744241c00000000 c744242002000000 }
$sequence_6hex{ 8b442404 81ec44010000 57 33ff 85c0 }
$sequence_7hex{ 3bc7 8901 761f 5f }
$sequence_8hex{ 8bca be90000000 99 f7fe 895c2408 894c240c }
$sequence_9hex{ 8b8324200000 5f 40 5e 898324200000 }

Condition

7 of them and filesize < 327680

In 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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

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References

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)

Original rule

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

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE