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

109 lines
3.5 KiB
Perl

#-----------------------------------------------------------
# imagefile
#
# References:
# http://msdn2.microsoft.com/en-us/library/a329t4ed(VS\.80)\.aspx
# CWDIllegalInDllSearch: http://support.microsoft.com/kb/2264107
# http://carnal0wnage.attackresearch.com/2012/04/privilege-escalation-via-sticky-keys.html
#
# Change history:
# 20131007 - added Carnal0wnage reference
# 20130425 - added alertMsg() functionality
# 20130410 - added Wow6432Node support
# 20100824 - added check for "CWDIllegalInDllSearch" value
#
# copyright 2013 Quantum Analytics Research, LLC
#-----------------------------------------------------------
package imagefile;
use strict;
my %config = (hive => "Software",
hasShortDescr => 1,
hasDescr => 0,
hasRefs => 0,
osmask => 22,
category => "malware",
version => 20131007);
sub getConfig{return %config}
sub getShortDescr {
return "Checks IFEO subkeys for Debugger & CWDIllegalInDllSearch values";
}
sub getDescr{}
sub getRefs {}
sub getHive {return $config{hive};}
sub getVersion {return $config{version};}
my $VERSION = getVersion();
sub pluginmain {
my $class = shift;
my $hive = shift;
::logMsg("Launching imagefile v.".$VERSION);
::rptMsg("imagefile v.".$VERSION); # banner
::rptMsg("(".getHive().") ".getShortDescr()."\n"); # banner
my $reg = Parse::Win32Registry->new($hive);
my $root_key = $reg->get_root_key;
my @paths = ("Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options",
"Wow6432Node\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options");
foreach my $key_path (@paths) {
my $key;
if ($key = $root_key->get_subkey($key_path)) {
::rptMsg($key_path);
# ::rptMsg("LastWrite Time ".gmtime($key->get_timestamp())." (UTC)");
# ::rptMsg("");
my @subkeys = $key->get_list_of_subkeys();
if (scalar(@subkeys) > 0) {
my %debug;
my $i = "Your Image File Name here without a path";
foreach my $s (@subkeys) {
my $name = $s->get_name();
next if ($name =~ m/^$i/i);
my $debugger;
eval {
$debugger = $s->get_value("Debugger")->get_data();
};
# If the eval{} throws an error, it's b/c the Debugger value isn't
# found within the key, so we don't need to do anything w/ the error
if ($debugger ne "") {
$debug{$name}{debug} = $debugger;
$debug{$name}{lastwrite} = $s->get_timestamp();
}
my $dllsearch = "";
eval {
$dllsearch = $s->get_value("CWDIllegalInDllSearch")->get_data();
};
# If the eval{} throws an error, it's b/c the Debugger value isn't
# found within the key, so we don't need to do anything w/ the error
if ($dllsearch ne "") {
$debug{$name}{dllsearch} = sprintf "0x%x",$dllsearch;
$debug{$name}{lastwrite} = $s->get_timestamp();
}
}
if (scalar (keys %debug) > 0) {
foreach my $d (keys %debug) {
::rptMsg($d." LastWrite: ".gmtime($debug{$d}{lastwrite}));
::rptMsg(" Debugger : ".$debug{$d}{debug}) if (exists $debug{$d}{debug});
::alertMsg("Alert: imagefile: Debugger value found : ".$debug{$d}{debug}) if (exists $debug{$d}{debug});
::rptMsg(" CWDIllegalInDllSearch: ".$debug{$d}{dllsearch}) if (exists $debug{$d}{dllsearch});
}
}
else {
::rptMsg("No Debugger/CWDIllegalInDllSearch values found.");
}
::rptMsg("");
}
else {
::rptMsg($key_path." has no subkeys.");
}
}
else {
::rptMsg($key_path." not found.");
}
}
}
1;