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https://github.com/overcuriousity/autopsy-flatpak.git
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97 lines
2.2 KiB
Perl
97 lines
2.2 KiB
Perl
#! c:\perl\bin\perl.exe
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#-----------------------------------------------------------
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# null.pl
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# Check key/value names in a hive for a leading null character
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#
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# Change history
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# 20160119 - created
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#
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# References:
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# http://www.symantec.com/connect/blogs/kovter-malware-learns-poweliks-persistent-fileless-registry-update
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#
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#
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# copyright 2016 QAR, LLC
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# Author: H. Carvey
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#-----------------------------------------------------------
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package null;
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use strict;
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my %config = (hive => "All",
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hasShortDescr => 1,
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hasDescr => 0,
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hasRefs => 0,
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osmask => 22,
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category => "malware",
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version => 20160119);
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sub getConfig{return %config}
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sub getShortDescr {
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return "Check key/value names in a hive for leading null char";
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}
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sub getDescr{}
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sub getRefs {}
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sub getHive {return $config{hive};}
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sub getVersion {return $config{version};}
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my $VERSION = getVersion();
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my %regkeys;
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sub pluginmain {
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my $class = shift;
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my $file = shift;
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my $reg = Parse::Win32Registry->new($file);
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my $root_key = $reg->get_root_key;
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::logMsg("Launching null v.".$VERSION);
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::rptMsg("null v.".$VERSION);
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::rptMsg("(".getHive().") ".getShortDescr()."\n");
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my $root = $root_key->as_string();
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$root = (split(/\[/,$root))[0];
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chop($root);
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traverse($root_key,$root);
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}
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sub traverse {
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my $key = shift;
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my $mask = shift;
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my $ts = $key->get_timestamp();
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my $path = $key->as_string();
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$path = (split(/\[/,$path))[0];
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$path =~ s/$mask//;
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# print $path."\n";
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my $name = $key->get_name();
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if (checkNull($name) == 1) {
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::rptMsg("Null char detected in key name: ".$path);
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}
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foreach my $val ($key->get_list_of_values()) {
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my $val_name = $val->get_name();
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next if ($val_name eq "");
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if (checkNull($val_name) == 1) {
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::rptMsg("Null char detected in value name");
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::rptMsg(" Key :".$path);
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::rptMsg(" Value:".$val_name);
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::rptMsg("");
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}
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}
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foreach my $subkey ($key->get_list_of_subkeys()) {
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traverse($subkey,$mask);
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}
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}
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sub checkNull {
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my $name = shift;
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my @name_list = split(//,$name);
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my $null = 0;
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my $hex = unpack("H*",$name);
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my $test = substr($hex,0,2);
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$null = 1 if ($test == 0);
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return $null;
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}
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1; |