DITEKSHEN_MALWARE_Win_Cratpluginscreencapture

rule DITEKSHEN_MALWARE_Win_Cratpluginscreencapture : FILE
{
	meta:
		description = "Detects CRAT Screen Capture plugin DLL"
		author = "ditekSHen"
		id = "ef0b6b88-8b1b-5ab5-ad81-276eaff0411f"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L1981-L2000"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "7b4378ae883d01338fabe2eb50a5509b722c661e63afc287afa07b263a0ebc42"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$ai1 = "VM detected!" fullword wide
		$ai2 = "Sandbox detected!" fullword wide
		$ai3 = "Debug detected!" fullword wide
		$ai4 = "Analysis process detected!" fullword wide
		$s1 = "User is inactive!, give up capture" wide
		$s2 = "Capturing screen..." wide
		$s3 = "%s\\P%02d%lu.tmp" fullword wide
		$s4 = "CloseHandle ScreenCaptureMutex failure! %d" fullword wide
		$s5 = "ScreenCaptureMutex already created! %s" fullword wide
		$s6 = "Create ScreenCaptureMutex %s failure %d" fullword wide
		$s7 = /ScreenCaptureThread\s(finished|terminated)!/ wide
		$s8 = /ScreenCapture_(x64|x32|Win64|Win32)_DllRelease\.dll/ fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( ( all of ( $ai* ) and 1 of ( $s* ) ) or ( 3 of ( $s* ) and 1 of ( $ai* ) ) or 6 of them )
}