signature-base/yara/gen_python_encoded_adware

rule gen_python_encoded_adware
{
    meta: 
        description = "Encoded Python payload for adware"
        author = "John Lambert @JohnLaTwC"
        date = "2018-03-07"
        hash = "5d7239be779367e69d2e63ffd9dc6e2a1f79c4e5c6c725e8c5e59a44c0ab2fff"
        reference = "https://twitter.com/JohnLaTwC/status/949048002466914304"
        
    strings:
        $r1 = "=__import__(\"base64\").b64decode"
        $r2 = ")))))"
        $s1 = "bytes(map(lambda"
        $s2 = "[1]^"
    condition:
        filesize < 100KB
        and @r1 < 100
        and @r2 > (filesize - 30)
        and all of them
}