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MALPEDIA_Win_Rockloader_Auto

autogenerated rule brought to you by yara-signator

MalwareRockloaderMalpedia 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: Rockloader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-rockloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rockloader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3b6fe0be-24e2-5fa5-9c6b-c51e1d1c929d"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rockloader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rockloader_auto.yar#L1-L117"
		license_url = "N/A"
		logic_hash = "793503e3062a6c8d1d48d29e6bfc48b2bfbd7ddb06209354c6c109f6ca1d96d0"
		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 = { 8945f8 eb07 c745ec01000000 8b36 85f6 }
		$sequence_1 = { 8d44c1a9 c3 33c0 c3 }
		$sequence_2 = { eb07 50 ff15???????? 8bf0 85f6 7507 33c0 }
		$sequence_3 = { 8d45ec 50 8d85a0f7ffff 50 }
		$sequence_4 = { ff7508 8bc6 e8???????? eb40 }
		$sequence_5 = { 46 80382d 750a dd05???????? 40 dd5de4 }
		$sequence_6 = { 7f09 0fbec9 8d44c1d0 eb24 80f941 7c0e 80f946 }
		$sequence_7 = { 66c7075d00 8bc6 5f 5e 5b }
		$sequence_8 = { 3b75f4 7ce9 ff75f8 ff15???????? }
		$sequence_9 = { 3c30 7c04 3c39 7e2a 3c5b 750c 8b4d08 }

	condition:
		7 of them and filesize < 98304
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8945f8 eb07 c745ec01000000 8b36 85f6 }
$sequence_1hex{ 8d44c1a9 c3 33c0 c3 }
$sequence_2hex{ eb07 50 ff15???????? 8bf0 85f6 7507 33c0 }
$sequence_3hex{ 8d45ec 50 8d85a0f7ffff 50 }
$sequence_4hex{ ff7508 8bc6 e8???????? eb40 }
$sequence_5hex{ 46 80382d 750a dd05???????? 40 dd5de4 }
$sequence_6hex{ 7f09 0fbec9 8d44c1d0 eb24 80f941 7c0e 80f946 }
$sequence_7hex{ 66c7075d00 8bc6 5f 5e 5b }
$sequence_8hex{ 3b75f4 7ce9 ff75f8 ff15???????? }
$sequence_9hex{ 3c30 7c04 3c39 7e2a 3c5b 750c 8b4d08 }

Condition

7 of them and filesize < 98304

In plain words (Heuristic)

  • The file must be smaller than 98304 (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.

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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: 3b6fe0be-24e2-5fa5-9c6b-c51e1d1c929d

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