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MALPEDIA_Win_Razr_Auto

autogenerated rule brought to you by yara-signator

MalwareRazrMalpedia 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: Razr.

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

Summary generated from the rule's metadata and condition.

Rule source

win-razr-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Razr_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "ba31ce6c-e3fa-5c6f-83e7-b9b03e941205"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.razr"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.razr_auto.yar#L1-L121"
		license_url = "N/A"
		logic_hash = "cb885b6a0f0cc8a44331e3c7b54660df8411ce8c119c824ce6753c4063939250"
		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 = { ffd0 85c0 740c 488b85c8000000 }
		$sequence_1 = { 41b801000000 ba00000080 4889c1 488b05???????? ffd0 }
		$sequence_2 = { 750a b800000000 e9???????? c785bc00000000000000 eb70 }
		$sequence_3 = { eb04 90 eb01 90 4881c440010000 }
		$sequence_4 = { 48895588 48b84748494a4b4c4d4e 48ba4f50515253545556 48894590 48895598 48b85455565758595a00 }
		$sequence_5 = { 48898dd0000000 488d057b9b0000 4889c1 e8???????? }
		$sequence_6 = { 8955fc 4863d0 488b4510 4801d0 c6002d 8345f801 837df820 }
		$sequence_7 = { 488d055dd00400 4889c1 488b05???????? ffd0 b800000000 4883c430 5d }
		$sequence_8 = { 4881c430010000 5d c3 55 4889e5 4883ec40 c745fc00000000 }
		$sequence_9 = { e8???????? 488d95d0010000 488d85c0000000 4889c1 488b05???????? ffd0 48898520030000 }

	condition:
		7 of them and filesize < 1626112
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ffd0 85c0 740c 488b85c8000000 }
$sequence_1hex{ 41b801000000 ba00000080 4889c1 488b05???????? ffd0 }
$sequence_2hex{ 750a b800000000 e9???????? c785bc00000000000000 eb70 }
$sequence_3hex{ eb04 90 eb01 90 4881c440010000 }
$sequence_4hex{ 48895588 48b84748494a4b4c4d4e 48ba4f50515253545556 48894590 48895598 48b85455565758595a00 }
$sequence_5hex{ 48898dd0000000 488d057b9b0000 4889c1 e8???????? }
$sequence_6hex{ 8955fc 4863d0 488b4510 4801d0 c6002d 8345f801 837df820 }
$sequence_7hex{ 488d055dd00400 4889c1 488b05???????? ffd0 b800000000 4883c430 5d }
$sequence_8hex{ 4881c430010000 5d c3 55 4889e5 4883ec40 c745fc00000000 }
$sequence_9hex{ e8???????? 488d95d0010000 488d85c0000000 4889c1 488b05???????? ffd0 48898520030000 }

Condition

7 of them and filesize < 1626112

In plain words (Heuristic)

  • The file must be smaller than 1626112 (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: ba31ce6c-e3fa-5c6f-83e7-b9b03e941205

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