Parasite HTTP

rule Parasite_http_bin
{
    meta:
        description = "Parasite HTTP"
        author = "James_inthe_box"
        reference = "0c6d4fb760c688236ac7ca81c778553c8d48c4e145fa5d99a3b24a1dc794edbe"
        date = "2019/04"
        maltype = "RAT"

    strings:
        $string1 = "Parasite HTTP"
        $string2 = "List start:"
        $string3 = "PrintActiveList"
        $string4 = "Active List; Domain : %s; Port : %d"

    condition:
        uint16(0) == 0x5A4D and uint8(uint32(0x3c)+23) == 0x21 and 3 of ($string*) and filesize < 800KB
}

rule Parasite_http_mem
{
    meta:
        description = "Parasite HTTP"
        author = "James_inthe_box"
        reference = "0c6d4fb760c688236ac7ca81c778553c8d48c4e145fa5d99a3b24a1dc794edbe"
        date = "2019/04"
        maltype = "RAT"

    strings:
        $string1 = "Parasite HTTP"
        $string2 = "List start:"
        $string3 = "PrintActiveList"
        $string4 = "Active List; Domain : %s; Port : %d"

    condition:
        3 of ($string*) and filesize > 800KB
}