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MALPEDIA_Win_Mariposa_Auto

autogenerated rule brought to you by yara-signator

MalwareMariposaMalpedia 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: Mariposa.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-mariposa-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mariposa_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2a3a2192-1985-5afb-a3c8-457f3f4c729c"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mariposa"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mariposa_auto.yar#L1-L118"
		license_url = "N/A"
		logic_hash = "343ac33f57cd9cc9bfc1841bf1bd211734de245f417ee554220587a46ed4086f"
		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 = { 55 8bec 53 56 bb???????? 43 }
		$sequence_1 = { ffd3 33c0 50 e8???????? 33c0 }
		$sequence_2 = { 53 56 bb???????? 43 }
		$sequence_3 = { 885c0cff e2f1 ba???????? 2bd6 8bdc 03da 4b }
		$sequence_4 = { 8a1c0e 02d8 32dc fec0 885c0cff e2f1 }
		$sequence_5 = { 8bdc 03da 4b 54 ffd3 33c0 }
		$sequence_6 = { 885c0cff e2f1 ba???????? 2bd6 }
		$sequence_7 = { 8a4301 8a6302 f6d0 02c4 d0f8 8a1c0e }
		$sequence_8 = { 53 56 bb???????? 43 803b00 }
		$sequence_9 = { 03da 4b 54 ffd3 33c0 }

	condition:
		7 of them and filesize < 311296
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 55 8bec 53 56 bb???????? 43 }
$sequence_1hex{ ffd3 33c0 50 e8???????? 33c0 }
$sequence_2hex{ 53 56 bb???????? 43 }
$sequence_3hex{ 885c0cff e2f1 ba???????? 2bd6 8bdc 03da 4b }
$sequence_4hex{ 8a1c0e 02d8 32dc fec0 885c0cff e2f1 }
$sequence_5hex{ 8bdc 03da 4b 54 ffd3 33c0 }
$sequence_6hex{ 885c0cff e2f1 ba???????? 2bd6 }
$sequence_7hex{ 8a4301 8a6302 f6d0 02c4 d0f8 8a1c0e }
$sequence_8hex{ 53 56 bb???????? 43 803b00 }
$sequence_9hex{ 03da 4b 54 ffd3 33c0 }

Condition

7 of them and filesize < 311296

In plain words (Heuristic)

  • The file must be smaller than 311296 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: 2a3a2192-1985-5afb-a3c8-457f3f4c729c

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