2018-01-03 14:43:27 -05:00

80 lines
2.0 KiB
Perl

#! c:\perl\bin\perl.exe
#-----------------------------------------------------------
# fileless.pl
#
#
# Change history
# 20150110 - updated with additional detection
# 20150101 - Created
#
# Ref:
# https://www.mysonicwall.com/sonicalert/searchresults.aspx?ev=article&id=761
# http://www.malwaretech.com/2014/12/phase-bot-fileless-rootkit.html
# http://www.kernelmode.info/forum/viewtopic.php?f=16&t=3669
#
#
# copyright 2015 QAR, LLC
# Author: H. Carvey, keydet89@yahoo.com
#-----------------------------------------------------------
package fileless;
use strict;
my %config = (hive => "All",
hasShortDescr => 1,
hasDescr => 0,
hasRefs => 0,
osmask => 22,
version => 20150110);
sub getConfig{return %config}
sub getShortDescr {
return "Scans a hive file looking for fileless malware entries";
}
sub getDescr{}
sub getRefs {}
sub getHive {return $config{hive};}
sub getVersion {return $config{version};}
my $VERSION = getVersion();
my %vals;
sub pluginmain {
my $class = shift;
my $file = shift;
my $reg = Parse::Win32Registry->new($file);
my $root_key = $reg->get_root_key;
::logMsg("Launching fileless v.".$VERSION);
::rptMsg("fileless v.".$VERSION); # banner
::rptMsg("(".getHive().") ".getShortDescr()."\n"); # banner
traverse($root_key);
}
sub traverse {
my $key = shift;
my $ts = $key->get_timestamp();
foreach my $val ($key->get_list_of_values()) {
my $type = $val->get_type();
if ($type == 1 || $type == 2) {
my $data = $val->get_data();
$data = lc($data);
if ($data =~ m/^rundll32 javascript/ || $data =~ m/^mshta/) {
::rptMsg("**Possible fileless malware found\.");
my $path = $key->get_path();
my @p = split(/\\/,$path);
$path = join('\\',@p[1..(scalar(@p) - 1)]);
::rptMsg($path);
::rptMsg("LastWrite time: ".gmtime($ts)." UTC");
::rptMsg("Data: ".$data);
::rptMsg("");
}
}
}
foreach my $subkey ($key->get_list_of_subkeys()) {
traverse($subkey);
}
}
1;