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MALPEDIA_Win_Freenki_Auto

autogenerated rule brought to you by yara-signator

MalwareFreenkiMalpedia 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: Freenki.

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

Summary generated from the rule's metadata and condition.

Rule source

win-freenki-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Freenki_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "67d32a2a-d637-58a9-8610-92987f338d68"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.freenki"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.freenki_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "5c9ee79650e79e88185f6c330eec821bed1141aec7128d72a60a985d0e9bdda0"
		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 = { 0f84d3000000 8b048de4db4100 89859cf8ffff 85c0 0f8498000000 }
		$sequence_1 = { c785c0edffff00000000 50 51 8d8dccedffff c785e0edffff07000000 c785dcedffff00000000 }
		$sequence_2 = { 6a33 8bd9 e8???????? 68???????? }
		$sequence_3 = { 8d85ccedffff 50 56 e8???????? 8b8de0edffff }
		$sequence_4 = { 3bc2 7d08 320c30 40 3bc2 }
		$sequence_5 = { 59 85c0 7471 8b45f0 8b4de8 8b048578394200 }
		$sequence_6 = { 8955e0 8b048d78394200 0fb6441028 83e001 747c }
		$sequence_7 = { eb1e 8b45fc 3bd6 8b0c8578394200 0f95c0 02c0 }
		$sequence_8 = { 85ff 75f2 897e10 83f908 720f 8b06 33c9 }
		$sequence_9 = { 83c420 85ff 746a 6690 8bce 33c0 }

	condition:
		7 of them and filesize < 327680
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 0f84d3000000 8b048de4db4100 89859cf8ffff 85c0 0f8498000000 }
$sequence_1hex{ c785c0edffff00000000 50 51 8d8dccedffff c785e0edffff07000000 c785dcedffff00000000 }
$sequence_2hex{ 6a33 8bd9 e8???????? 68???????? }
$sequence_3hex{ 8d85ccedffff 50 56 e8???????? 8b8de0edffff }
$sequence_4hex{ 3bc2 7d08 320c30 40 3bc2 }
$sequence_5hex{ 59 85c0 7471 8b45f0 8b4de8 8b048578394200 }
$sequence_6hex{ 8955e0 8b048d78394200 0fb6441028 83e001 747c }
$sequence_7hex{ eb1e 8b45fc 3bd6 8b0c8578394200 0f95c0 02c0 }
$sequence_8hex{ 85ff 75f2 897e10 83f908 720f 8b06 33c9 }
$sequence_9hex{ 83c420 85ff 746a 6690 8bce 33c0 }

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.

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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: 67d32a2a-d637-58a9-8610-92987f338d68

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