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Powerful, highly stealthy Linux trojan may have infected victims for years

arstechnica.com

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Re: Powerful, highly stealthy Linux trojan may have infected victims for years

#101
post #20

Earlier quoted context omitted.

This may take a while depending on the amount of data you have and the speed of your disk(s): grep -R -e 'TREX_PID=%u' -e 'Remote VS is empty !' / Alternatively you could create ClamAV signatures based on those strings.

This seems to get stuck for me after a few minutes (grep stops taking up CPU cycles). I thought maybe it was getting stuck trying to read something it shouldn't, but lsof gives no clues.

Perhaps try strace-ing the process? It should give you some clue as to what is going on.

Re: Powerful, highly stealthy Linux trojan may have infected victims for years

#102
post #101

Earlier quoted context omitted.

This seems to get stuck for me after a few minutes (grep stops taking up CPU cycles). I thought maybe it was getting stuck trying to read something it shouldn't, but lsof gives no clues.

Perhaps try strace-ing the process? It should give you some clue as to what is going on.

Ah, it's getting stuck on /var/spool/postfix/public/pickup

Rerunning with "-D skip"

Re: Powerful, highly stealthy Linux trojan may have infected victims for years

#103
post #20
post #2

Is there a quick and dirty script/one liner I can run to check my VPS right now?

This may take a while depending on the amount of data you have and the speed of your disk(s): grep -R -e 'TREX_PID=%u' -e 'Remote VS is empty !' / Alternatively you could create ClamAV signatures based on those strings.

I suggest with nice/ionice:

  ionice -c 3 nice -n 19 grep -R -e 'TREX_PID=%u' -e 'Remote VS is empty !' /
You can also check the whole drive:

  ionice -c 3 nice -n 19 grep -ab -e 'TREX_PID=%u' -e 'Remote VS is empty !' /dev/sda
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