notepad_ANOMALY

rule notepad_ANOMALY {
	meta:
		license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
		author = "Florian Roth (Nextron Systems)"
		description = "Abnormal notepad.exe - typical strings not found in file"
		date = "01/06/2014"
		score = 55
		id = "16ddcd9e-ab6f-593e-80e0-a90399cbc3df"
	strings:
		$win7 = "HELP_ENTRY_ID_NOTEPAD_HELP" wide fullword
		$win2000 = "Do you want to create a new file?" wide fullword
		$win2003 = "Do you want to save the changes?" wide
		$winxp = "Software\\Microsoft\\Notepad" wide
		$winxp_de = "Software\\Microsoft\\Notepad" wide
	condition:
		filename == "notepad.exe"
      and uint16(0) == 0x5a4d
      and not 1 of ($win*) and not WINDOWS_UPDATE_BDC
}