Malicious perl script

 
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Old 02-24-2017
Hi,

I suspect these are two different issues. So far you have seen evidence of attempted brute-forcing of your WordPress logins, and you also saw a Perl script establishing a variety of outbound SMTP connections back at the very start of this thread.

It is entirely possible that the two are related, but equally they may not be. There's always a steady trickle of would-be brute-forcing and exploit scanning in the logs of pretty much every Web server on the Internet, more or less. If your WordPress installation is genuinely secure, these should be nothing to worry about. More sinister is the Perl script.

If in the output of ps and top right now you're not able to see any errant Perl scripts, and if there is nothing Perl-related in any of your Web logs, then there's not much more you can do at this point to track down that Perl script.

What you can say for sure is that your server was clearly running an unexpected Perl script that appeared to be establishing a variety of outbound SMTP connections, and it must have come from somewhere. And if that somewhere wasn't you, then you do definitely have a security issue you still need to get to the bottom of.
 
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SWWDOG(4)						   BSD Kernel Interfaces Manual 						 SWWDOG(4)

NAME
swwdog -- software watchdog timer SYNOPSIS
pseudo-device swwdog DESCRIPTION
The swwdog driver provides a software watchdog timer that works with wdogctl(8). If the timer expires, the system reboots if the boolean variable swwdog_reboot is true; otherwise, the system will panic. swwdog_reboot is accessible as a sysctl(8) variable, hw.swwdog.reboot and defaults to false. The default period of swwdog is 60 seconds. As with other watchdog timers, the swwdog driver prevents a system from suspending when the watchdog is armed. SEE ALSO
sysctl(8), wdogctl(8) HISTORY
The swwdog driver was written by Steven M. Bellovin. BUGS
Only one watchdog timer can be active at any given time. (Arguably, this is a bug in the watchdog timer framework.) Therefore, only a sin- gle instance of the swwdog device can be created. Kernel tickle mode is useless with swwdog and arguably should be rejected, since both it and this driver rely on the same callout mechanism; if one is blocked, almost certainly the other is as well. The alarm option to wdogctl(8) isn't implemented. BSD
June 8, 2011 BSD