DITEKSHEN_MALWARE_Win_Jennlog

rule DITEKSHEN_MALWARE_Win_Jennlog : FILE
{
	meta:
		description = "Detects JennLog loader"
		author = "ditekSHen"
		id = "38f8cd13-f157-5cce-bf04-80c29d254144"
		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#L7980-L7996"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "085a4783c7c01ec95491d9999d1835ad9ab3dc70d77b944578e097b3ffe3a627"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$x1 = "%windir%\\system32\\rundll32.exe advapi32.dll,ProcessIdleTasks" fullword wide
		$x2 = "https://fkpageintheworld342.com" fullword wide
		$s1 = "ExecuteInstalledNodeAndDelete" fullword ascii
		$s2 = "ProcessExsist" fullword ascii
		$s3 = "helloworld.Certificate.txt" fullword wide
		$s4 = "ASCII85 encoded data should begin with '" fullword wide
		$s5 = "] WinRE config file path: C:\\" ascii
		$s6 = "] Parameters: configWinDir: NULL" ascii
		$s7 = "] Update enhanced config info is enabled." ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( ( 1 of ( $x* ) and 3 of ( $s* ) ) or 5 of ( $s* ) or ( all of ( $x* ) and 2 of ( $s* ) ) )
}