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Old 02-20-2005, 02:38 PM   #1
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An extraneous process named "fun"

Hi all there,

I don't know if this topic is correct published in this section, but I can't figure where can do it. I was looking for this but no information related could be found.

My server are running since 2001, with RH 7.1, K 2.4.18-27.7

Today i see a process named "fun" and i don't know what is it and never before:

# top

2:10pm up 69 days, 20:56, 1 user, load average: 0.95, 0.85, 0.62
76 processes: 69 sleeping, 5 running, 1 zombie, 1 stopped
CPU states: 24.1% user, 3.9% system, 0.0% nice, 71.9% idle
Mem: 126476K av, 118580K used, 7896K free, 0K shrd, 3140K buff
Swap: 1052216K av, 17980K used, 1034236K free 57672K cached

7244 root 16 0 1508 1508 348 R 16.2 1.1 6:10 fun

Also, I start to recive a messanges from the server (every 30 mins):

Sender: Cron deamon
Subjetc: Cron <nobody@server1> (kill -9 `/sbin/pidof .cinik`;cd /dev/shm;PATH=.:$PATH;apps) > /dev/null 2>&1


execl: couldn't exec `/bin/sh'
execl: Permission denied

I was unable to identify the cron process that generate such messages.

Any body knows what are those things ?

I really appreciate any help.


h. yamasaki
Old 02-20-2005, 03:04 PM   #2
Registered: Aug 2002
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Looks like a worm

You might have:
CiNIK Worm (Slapper.B variant)

The following is trying to find the pid of running process .cinik and tries to kill it.
kill -9 `/sbin/pidof .cinik`

Not sure what the fun process is all about. I would get chkrootkit and a antivirus program and run them. Then I would take a look at the firewall and processes you are running. RH 7.1 is old and may have several security vulnerabilities like openssl.

Last edited by michaelk; 02-20-2005 at 03:14 PM.
Old 02-20-2005, 03:20 PM   #3
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I will point out to any Windows users here that, should this indeed prove to be a worm, it has apparently done no damage because the damage it is attempting to do is being met by the system with a "permission denied". Furthermore, the system is notifying the administrator of the problem completely on its own.

You see here the most important difference between Linux and Windows; in Windows a worm usually would be running with administrator permissions because Windows encourages users to log in as administrators. If it were running as an administrator ("root" in Unix-speak) then this worm could do whatever it wanted to do.
Old 02-21-2005, 02:23 PM   #4
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Registered: Nov 2004
Location: Third rock from the Sun
Distribution: NetBSD-2, FreeBSD-5.4, OpenBSD-3.[67], RHEL[34], OSX 10.4.1
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And I'll point out to you that if /bin/sh existed executable on his system (like it does on pretty much every *NIX machine on earth), it would be running along with him none the wiser ...

Like I've said before -- Security is in the hands of the admin. 7.x was old a long time ago, and unless he's rolling his own patches, it's vulnerable to a *lot* of exploit code...

Edit: OP: Look at /dev/shm/apps and see what it's trying to do.

Also, the crontabs are where you want to look for this. /etc/crontab is one, and the others are stored in /var/cron/tabs/<username> (I think, I don't have a RH7 system sitting here). You should find the entry that you're getting emailed about in one of the crontabs on the system.

Last edited by sigsegv; 02-21-2005 at 02:35 PM.


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