'rpm -V' can be misleading, if taking into account of prelink on Redhat/Centos Boxes which is running through cron by default. I've shown the steps on reverse the effect of prelink at the comments sections at link https://isc.sans.edu/diary/SSHD+rootkit+in+the+wild/15229?storyid=15229. I'm afraid that 'rpm -V' only will make big noises or false alarms. But in general, maybe it is a good time to turn off prelink, or more aggressively, remove prelink packages from Centos 5/6? the prelink is said to bring some performance boost, but who really cares in the era of tens of CPUs? nowadays and later on we are -- and will -- more concerned on security threats instead of 3~5 percents CPU/performance gain, right? ________________________________ From: Leon Fauster <leonfauster at googlemail.com> To: CentOS mailing list <centos at centos.org> Sent: Saturday, February 23, 2013 3:14 AM Subject: Re: [CentOS] SSHD rootkit in the wild/compromise for CentOS 5/6? Am 23.02.2013 um 05:52 schrieb Karanbir Singh <mail-lists at karan.org>: > On 02/22/2013 09:35 PM, Leon Fauster wrote: >> i use following script to scan top level >> directories for files that are not packaged: > > If you trust your rpm-db, ... i used to scan this list rpm -qa --qf '%{NAME}-%{SIGGPG:pgpsig}-%{SIGPGP:pgpsig}-%{VENDOR}\n' and checked them against keys that are _not_ in /etc/pki/rpm-gpg/. Just as a normal sanity check (plus rpm -V). i aware that this does not substitute a real auditing solution. -- LF _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos