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MALPEDIA_Win_Netkey_Auto

autogenerated rule brought to you by yara-signator

MalwareNetkeyMalpedia 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: Netkey.

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

Summary generated from the rule's metadata and condition.

Rule source

win-netkey-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Netkey_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "cebad505-70c0-5a27-bc92-bc043fe74d2b"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.netkey"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.netkey_auto.yar#L1-L129"
		license_url = "N/A"
		logic_hash = "28c40c311262c3777ed829896914bd7c91f10e0be298652d07d4d78191bd69e1"
		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 = { 85c0 0f94c3 8d1c5dffffffff eb03 83cbff 8b45ec 83f810 }
		$sequence_1 = { 56 8b7508 81c1f0000000 6aff }
		$sequence_2 = { 6a3a 8d4de0 660fd645e0 e8???????? 83c404 c645fc01 b8abaaaa2a }
		$sequence_3 = { 8bec 836d0801 7414 8b0d???????? 6a00 e8???????? 83c404 }
		$sequence_4 = { ff15???????? 85c0 0f84ae010000 68???????? 50 ff15???????? 8d8da0fdffff }
		$sequence_5 = { e8???????? 8bd0 52 e8???????? 83c404 c745f00f000000 c745ec00000000 }
		$sequence_6 = { 8b4708 8d7620 05d8a16e00 3146e0 8b470c 0555fcc002 }
		$sequence_7 = { 8bce e8???????? 85c0 7855 660f1f440000 8b7f04 }
		$sequence_8 = { 8d4d90 e8???????? 68???????? 8bd0 c645fc07 8d4da8 e8???????? }
		$sequence_9 = { 6a40 6800300000 ff7350 ff7334 ff36 ff15???????? 898524fdffff }

	condition:
		7 of them and filesize < 606208
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 85c0 0f94c3 8d1c5dffffffff eb03 83cbff 8b45ec 83f810 }
$sequence_1hex{ 56 8b7508 81c1f0000000 6aff }
$sequence_2hex{ 6a3a 8d4de0 660fd645e0 e8???????? 83c404 c645fc01 b8abaaaa2a }
$sequence_3hex{ 8bec 836d0801 7414 8b0d???????? 6a00 e8???????? 83c404 }
$sequence_4hex{ ff15???????? 85c0 0f84ae010000 68???????? 50 ff15???????? 8d8da0fdffff }
$sequence_5hex{ e8???????? 8bd0 52 e8???????? 83c404 c745f00f000000 c745ec00000000 }
$sequence_6hex{ 8b4708 8d7620 05d8a16e00 3146e0 8b470c 0555fcc002 }
$sequence_7hex{ 8bce e8???????? 85c0 7855 660f1f440000 8b7f04 }
$sequence_8hex{ 8d4d90 e8???????? 68???????? 8bd0 c645fc07 8d4da8 e8???????? }
$sequence_9hex{ 6a40 6800300000 ff7350 ff7334 ff36 ff15???????? 898524fdffff }

Condition

7 of them and filesize < 606208

In plain words (Heuristic)

  • The file must be smaller than 606208 (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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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: cebad505-70c0-5a27-bc92-bc043fe74d2b

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