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MALPEDIA_Win_Fonix_Auto

autogenerated rule brought to you by yara-signator

MalwareFonixMalpedia 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: Fonix.

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

Summary generated from the rule's metadata and condition.

Rule source

win-fonix-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Fonix_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "4900a49c-53ff-58e3-8741-0a01bd599c10"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.fonix"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.fonix_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "553cbdbcbcd711010287bdf9f31e679e2d986459fdb32dc6d12479a4feccc0a4"
		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 = { 6a01 8d8d20010000 e8???????? c78514010000d0554900 c78518010000fc554900 c7851c01000020564900 8b8528010000 }
		$sequence_1 = { 8d8d74feffff 56 57 c645fc14 e8???????? 6a02 51 }
		$sequence_2 = { 8d8d5cfcffff e8???????? 68???????? 8d955cfcffff c645fc16 8d8d2cfcffff e8???????? }
		$sequence_3 = { 89a590fdffff 57 e8???????? 83ec18 c645fc34 8bcc 68???????? }
		$sequence_4 = { 8d8d48feffff e8???????? 8d8d48feffff e8???????? 8d8d48feffff e8???????? 8d4dd8 }
		$sequence_5 = { 50 8d8de0feffff e8???????? 8d8dc8feffff e8???????? 8d8db0feffff e8???????? }
		$sequence_6 = { 83c044 c3 6a14 b8???????? e8???????? 8bf1 }
		$sequence_7 = { 50 8d4500 50 e8???????? 8b43c4 8d73c4 83c408 }
		$sequence_8 = { 8b45fc 0580000000 c5fe7f00 c5fe6f8560feffff c4e37d46458031 c5fe7f8580e5ffff c5fe6f8580e5ffff }
		$sequence_9 = { 85db 0f8494000000 837e2c00 7e03 ff4628 8b4e28 33ff }

	condition:
		7 of them and filesize < 2226176
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 6a01 8d8d20010000 e8???????? c78514010000d0554900 c78518010000fc554900 c7851c01000020564900 8b8528010000 }
$sequence_1hex{ 8d8d74feffff 56 57 c645fc14 e8???????? 6a02 51 }
$sequence_2hex{ 8d8d5cfcffff e8???????? 68???????? 8d955cfcffff c645fc16 8d8d2cfcffff e8???????? }
$sequence_3hex{ 89a590fdffff 57 e8???????? 83ec18 c645fc34 8bcc 68???????? }
$sequence_4hex{ 8d8d48feffff e8???????? 8d8d48feffff e8???????? 8d8d48feffff e8???????? 8d4dd8 }
$sequence_5hex{ 50 8d8de0feffff e8???????? 8d8dc8feffff e8???????? 8d8db0feffff e8???????? }
$sequence_6hex{ 83c044 c3 6a14 b8???????? e8???????? 8bf1 }
$sequence_7hex{ 50 8d4500 50 e8???????? 8b43c4 8d73c4 83c408 }
$sequence_8hex{ 8b45fc 0580000000 c5fe7f00 c5fe6f8560feffff c4e37d46458031 c5fe7f8580e5ffff c5fe6f8580e5ffff }
$sequence_9hex{ 85db 0f8494000000 837e2c00 7e03 ff4628 8b4e28 33ff }

Condition

7 of them and filesize < 2226176

In plain words (Heuristic)

  • The file must be smaller than 2226176 (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: 4900a49c-53ff-58e3-8741-0a01bd599c10

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

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