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On Thu, Oct 6, 2011 at 11:10 AM, Michael Mol <mikemol@×××××.com> wrote: |
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> On Thu, Oct 6, 2011 at 11:01 AM, Nilesh Govindarajan |
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> <contact@××××××××.com> wrote: |
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>> One of the servers I manage has a strange problem. |
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>> |
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>> Every 24h, someone starts a process shows up as perl in the list, but |
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>> launching command is /usr/sbin/httpd. |
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>> It shows just one process, but when I run something like this: |
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>> |
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>> ps -C perl -o cmd,pid |
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>> |
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>> I get some 5-6 processes alternatively with cmd as /usr/sbin/httpd or |
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>> /usr/bin/perl. |
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>> |
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>> The even more interesting thing is, /usr/sbin/httpd does not exist. |
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>> I suspect a rootkit, but chkrootkit & rkhunter reported nothing. |
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>> |
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>> Also, I found a mysterious file: /tmp/ips.txt with following content: |
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>> xxx.xxx.xxx.xxx |
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>> 127.0.0.1 |
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>> addr:xxx.xxx.xxx.xxx |
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>> addr: |
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>> addr:127.0.0.1 |
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>> addr: |
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>> |
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>> Somebody is aware of a malware/rootkit which creates such files? |
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> |
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> No direct experience with Linux rootkits, but you might have better |
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> luck if you run a statically-linked copy of busybox that can talk to |
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> the kernel, rather than going through a potentially malicious libc. |
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> |
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> Is this a server running Gentoo or some other distro? |
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|
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Mm. Something else. A process is allowed to modify its argv[0], which |
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changes what you see when you run commands like 'ps'. However, if you |
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take a look at what's in /proc for the PID in question, you might be |
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able get a better idea of the file's origin. |
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|
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|
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-- |
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:wq |
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