Malware detection on host, backdoor '4553' found, possible compromis
# SPDX-FileCopyrightText: 2002 Violating
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.11187");
script_version("2023-08-01T13:29:10+0000");
script_tag(name:"cvss_base", value:"9.3");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_tag(name:"last_modification", value:"2023-08-01 13:29:10 +0000 (Tue, 01 Aug 2023)");
script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
script_name("4553 Parasite Mothership Detect");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2002 Violating");
script_family("Malware");
script_dependencies("find_service.nasl");
script_require_ports(21227, 21317);
script_tag(name:"solution", value:"Re-install this host.");
script_tag(name:"summary", value:"The backdoor '4553' seems to be installed on this host, which indicates
it has been compromised.");
script_tag(name:"solution_type", value:"Mitigation");
script_tag(name:"qod_type", value:"remote_analysis");
exit(0);
}
foreach port( make_list( 21227, 21317 ) ) {
if( ! get_port_state( port ) )
continue;
soc = open_sock_tcp( port );
if( ! soc )
continue;
send( socket:soc, data:"-0x45-" );
data = recv( socket:soc, length:1024 );
close( soc );
if( "0x53" >< data || "<title>UNAUTHORIZED-ACCESS!</title>" >< data ) {
security_message( port:port );
}
}
exit( 0 );
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