GEN_PowerShell.yar

rule GEN_PowerShell {
	meta:
    	description = "Generic PowerShell Malware Rule"
      author = "https://github.com/interleaved"
    strings:
    	$s1 = "powershell"
        $s2 = "-ep bypass" nocase
        $s3 = "-nop" nocase
        $s10 = "-executionpolicy bypass" nocase
        $s4 = "-win hidden" nocase
        $s5 = "-windowstyle hidden" nocase
        $s11 = "-w hidden" nocase
        /*$s6 = "-noni" fullword ascii*/
        /*$s7 = "-noninteractive" fullword ascii*/
        $s8 = "-enc" nocase
        $s9 = "-encodedcommand" nocase
    condition:
    	$s1 and (($s2 or $s3 or $s10) and ($s4 or $s5 or $s11) and ($s8 or $s9))
}