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MALPEDIA_Win_Norobot_Auto

autogenerated rule brought to you by yara-signator

MalwareNorobotMalpedia 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: Norobot.

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

Summary generated from the rule's metadata and condition.

Rule source

win-norobot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Norobot_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d64f00eb-ea09-58b8-8deb-e767f434adae"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.norobot"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.norobot_auto.yar#L1-L126"
		license_url = "N/A"
		logic_hash = "301bc368a5f3a3efd68d3ce5fddd9c6ac9a49ce5d23ceec5450ce7bae0f401cc"
		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 = { 8945d0 7413 8b04ca 488d15298cfdff 4803c2 }
		$sequence_1 = { 4c8bda 488bf9 f6c304 7424 410fb60a 83e10f 4a0fbe843160b80200 }
		$sequence_2 = { 7706 ff15???????? 488364243000 488d0ddcc60000 8364242800 41b803000000 4533c9 }
		$sequence_3 = { 488bb424a0000000 4c8d159b6a0100 4533db 488d3d09e60000 4d85c9 488bc2 4c8be2 }
		$sequence_4 = { e8???????? 4889842488000000 488d8c24a8000000 e8???????? 488b8c2488000000 4803c8 }
		$sequence_5 = { 4883c807 4889442428 488b442460 4839442428 7607 }
		$sequence_6 = { 488b4c2458 ff15???????? 4889442450 48837c245000 7536 488d1540150300 }
		$sequence_7 = { 7502 eb26 baffffffff 488b4c2450 ff15???????? 488b4c2450 }
		$sequence_8 = { 4c8d0540effeff 4a0fbe840160b80200 420fb68c0170b80200 482bd0 8b42fc d3e8 898424c0000000 }
		$sequence_9 = { 48896c2418 57 4883ec20 4863d9 488d0d076c0100 488bd3 }

	condition:
		7 of them and filesize < 545792
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8945d0 7413 8b04ca 488d15298cfdff 4803c2 }
$sequence_1hex{ 4c8bda 488bf9 f6c304 7424 410fb60a 83e10f 4a0fbe843160b80200 }
$sequence_2hex{ 7706 ff15???????? 488364243000 488d0ddcc60000 8364242800 41b803000000 4533c9 }
$sequence_3hex{ 488bb424a0000000 4c8d159b6a0100 4533db 488d3d09e60000 4d85c9 488bc2 4c8be2 }
$sequence_4hex{ e8???????? 4889842488000000 488d8c24a8000000 e8???????? 488b8c2488000000 4803c8 }
$sequence_5hex{ 4883c807 4889442428 488b442460 4839442428 7607 }
$sequence_6hex{ 488b4c2458 ff15???????? 4889442450 48837c245000 7536 488d1540150300 }
$sequence_7hex{ 7502 eb26 baffffffff 488b4c2450 ff15???????? 488b4c2450 }
$sequence_8hex{ 4c8d0540effeff 4a0fbe840160b80200 420fb68c0170b80200 482bd0 8b42fc d3e8 898424c0000000 }
$sequence_9hex{ 48896c2418 57 4883ec20 4863d9 488d0d076c0100 488bd3 }

Condition

7 of them and filesize < 545792

In plain words (Heuristic)

  • The file must be smaller than 545792 (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: d64f00eb-ea09-58b8-8deb-e767f434adae

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