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YARA · CAPE Sandbox (CAPEv2)

CAPE_Risepro

No description has been set in the source file - CAPE

MalwareRiseproCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
kevoreilly
Date
2023-12-16
Score / Quality
75 / 70

What this rule detects

No description has been set in the source file - CAPE

Associated malware family: Risepro.

Targets: Windows PE.

It defines 3 patterns (0 text, 3 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
risepro.yarGNU General Public License v3.0
rule CAPE_Risepro : FILE
{
	meta:
		description = "No description has been set in the source file - CAPE"
		author = "kevoreilly"
		id = "63d9cb19-0688-5632-8477-ce9b7e986a55"
		date = "2023-12-16"
		modified = "2023-12-16"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/analyzer/windows/data/yara/RisePro.yar#L1-L14"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		hash = "1b69a1dd5961241b926605f0a015fa17149c3b2759fb077a30a22d4ddcc273f6"
		logic_hash = "055ca8328923b91f93c116e4a856366356fa11155f4e9fde95da31129b51386a"
		score = 75
		quality = 70
		tags = "FILE"
		cape_options = "bp0=$c2+15,action0=string:edx,bp1=$c2+41,action1=string:ecx,count=1"

	strings:
		$decode1 = {8A 06 46 84 C0 75 F9 2B F1 B8 FF FF FF 7F 8B 4D ?? 8B 51 ?? 2B C2 3B C6 72 38 83 79 ?? 10 72 02 8B 09 52 51 56 53 51 FF 75 ?? 8B CF E8}
		$decode2 = {8B D9 81 FF FF FF FF 7F 0F [2] 00 00 00 C7 43 ?? 0F 00 00 00 83 FF 10 73 1A 57 FF 75 ?? 89 7B ?? 53 E8 [4] 83 C4 0C C6 04 1F 00 5F 5B 5D C2 08 00}
		$c2 = {FF 75 30 83 3D [4] 10 BA [4] B9 [4] 0F 43 15 [4] 83 3D [4] 10 0F 43 0D [4] E8 [4] A3}

	condition:
		uint16( 0 ) == 0x5A4D and any of them
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$decode1hex{8A 06 46 84 C0 75 F9 2B F1 B8 FF FF FF 7F 8B 4D ?? 8B 51 ?? 2B C2 3B C6 72 38 83 79 ?? 10 72 02 8B 09 52 51 56 53 51 FF 75 ?? 8B CF E8}
$decode2hex{8B D9 81 FF FF FF FF 7F 0F [2] 00 00 00 C7 43 ?? 0F 00 00 00 83 FF 10 73 1A 57 FF 75 ?? 89 7B ?? 53 E8 [4] 83 C4 0C C6 04 1F 00 5F 5B 5D C2 08 00}
$c2hex{FF 75 30 83 3D [4] 10 BA [4] B9 [4] 0F 43 15 [4] 83 3D [4] 10 0F 43 0D [4] E8 [4] A3}

Condition

uint16( 0 ) == 0x5A4D and any of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least one pattern in the rule must match.

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References

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • 1b69a1dd5961241b926605f0a015fa17149c3b2759fb077a30a22d4ddcc273f6

Licence & attribution

Author: kevoreilly

Source repository: CAPE Sandbox (CAPEv2) @ 6b15e76f28

Licence: GNU General Public License v3.0 (repository licence)

Copyright notice: Cuckoo Sandbox is copyrighted by the Cuckoo Foundation.

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 63d9cb19-0688-5632-8477-ce9b7e986a55

Metadata

cape_optionsbp0=$c2+15,action0=string:edx,bp1=$c2+41,action1=string:ecx,count=1

Tags:FILE

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