On Oct 6, 2011 12:57 PM, "Nilesh Govindarajan" <[email protected]> wrote: > > On Thu 06 Oct 2011 09:06:06 PM IST, Alberto Luaces wrote: > > Nilesh Govindarajan writes: > > > >> One of the servers I manage has a strange problem. > >> > >> Every 24h, someone starts a process shows up as perl in the list, but > >> launching command is /usr/sbin/httpd. > >> It shows just one process, but when I run something like this: > >> > >> ps -C perl -o cmd,pid > >> > >> I get some 5-6 processes alternatively with cmd as /usr/sbin/httpd or > >> /usr/bin/perl. > >> > >> The even more interesting thing is, /usr/sbin/httpd does not exist. > >> I suspect a rootkit, but chkrootkit & rkhunter reported nothing. > >> > >> Also, I found a mysterious file: /tmp/ips.txt with following content: > >> xxx.xxx.xxx.xxx > >> 127.0.0.1 > >> addr:xxx.xxx.xxx.xxx > >> addr: > >> addr:127.0.0.1 > >> addr: > >> > >> Somebody is aware of a malware/rootkit which creates such files? > > > > I had some of that recently. The attacker used a instance of phpmyadmin > > to inject into its URL a wget command to download a perl script from > > another site. Look for `wget' into apache logs. > > > > @all > Apache was never installed & I don't see any reason to install it > because nginx satisfies my needs. I grepped for the string wget in all > logs and php files, found some, but they were for libssh2 in wordpress > code. > @Michael, > I thought of doing that, but before I discovered the file, I'd already > killed the processes. Will check later when the process is relaunched > sometime later.
You might crank up service log levels in anticipation, too, and prod your firewall to log unusual-but-allowed connections, too.
