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MALPEDIA_Win_Nitlove_Auto

autogenerated rule brought to you by yara-signator

MalwareNitloveMalpedia 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: Nitlove.

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

Summary generated from the rule's metadata and condition.

Rule source

win-nitlove-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Nitlove_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "1be99c41-1963-58ec-8cf0-aedd46ac6fd9"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nitlove"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.nitlove_auto.yar#L1-L117"
		license_url = "N/A"
		logic_hash = "539576f1d084cda9c06cc41a943bc6264fb00085ac0bf62483af90c6062ea6ad"
		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 = { e8???????? eb03 8b7508 3b75fc 0f8252ffffff 5b 5f }
		$sequence_1 = { 837c241008 8b742414 0f86de000000 6a3c }
		$sequence_2 = { 8bec 81ec04050000 53 56 8d45fc }
		$sequence_3 = { ffd0 8b45d0 85c0 7452 8b75fc 897ddc 2bf7 }
		$sequence_4 = { 8b650c 8b45d0 8b55d4 5f }
		$sequence_5 = { 8d8dfcfcffff e8???????? 51 8d95fcfcffff b9???????? e8???????? }
		$sequence_6 = { 33c9 ba1e3d0000 66898c0504feffff 8d8d04feffff e8???????? 84c0 }
		$sequence_7 = { 53 6a05 ffd6 833b00 }
		$sequence_8 = { 6806000200 53 52 51 be???????? ba14eb4517 }
		$sequence_9 = { ff750c ff7508 6aff ffd0 }

	condition:
		7 of them and filesize < 49152
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? eb03 8b7508 3b75fc 0f8252ffffff 5b 5f }
$sequence_1hex{ 837c241008 8b742414 0f86de000000 6a3c }
$sequence_2hex{ 8bec 81ec04050000 53 56 8d45fc }
$sequence_3hex{ ffd0 8b45d0 85c0 7452 8b75fc 897ddc 2bf7 }
$sequence_4hex{ 8b650c 8b45d0 8b55d4 5f }
$sequence_5hex{ 8d8dfcfcffff e8???????? 51 8d95fcfcffff b9???????? e8???????? }
$sequence_6hex{ 33c9 ba1e3d0000 66898c0504feffff 8d8d04feffff e8???????? 84c0 }
$sequence_7hex{ 53 6a05 ffd6 833b00 }
$sequence_8hex{ 6806000200 53 52 51 be???????? ba14eb4517 }
$sequence_9hex{ ff750c ff7508 6aff ffd0 }

Condition

7 of them and filesize < 49152

In plain words (Heuristic)

  • The file must be smaller than 49152 (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.

Open in editor

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: 1be99c41-1963-58ec-8cf0-aedd46ac6fd9

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