DITEKSHEN_MALWARE_Win_Chebka

rule DITEKSHEN_MALWARE_Win_Chebka : FILE
{
	meta:
		description = "Detects Chebka"
		author = "ditekSHen"
		id = "df486522-695c-56f5-b93a-6f16829a3a3e"
		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#L9009-L9030"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "cc8123a5d20fac51d4dfc225e743539456efb4d649060d078c3ed93e7724da01"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "-k netsvcs" wide
		$s2 = "%ssvchost.exe -k SystemNetworkService" wide
		$s3 = "Mozilla/4.0 (compatible)" wide
		$s4 = "_kasssperskdy" wide
		$s5 = "winssyslog" wide
		$s6 = "LoaderDll%d" wide
		$s7 = "cmd.exe /c rundll32.exe shell32.dll," wide
		$s8 = /cmd.exe \/c start (chrome|msedge|firefox|iexplorer)\.exe/ wide
		$f1 = ".?AVCHVncManager@@" fullword ascii
		$f2 = ".?AVCNetstatManager@@" fullword ascii
		$f3 = ".?AVCTcpAgentListener@@" fullword ascii
		$f4 = ".?AVIUdpClientListener@@" fullword ascii
		$f5 = ".?AVCShellManager@@" fullword ascii
		$f6 = ".?AVCScreenSpy@@" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( 5 of ( $s* ) or all of ( $f* ) or ( 3 of ( $f* ) and 3 of ( $s* ) ) or ( #s8 > 2 and 5 of them ) )
}