Hello: If there are processes running on your machine which you do not recognize, assume the machine has been compromised. Take it offline and wipe it immediately. Neil -- Neil Aggarwal, (832)245-7314, www.JAMMConsulting.com Eliminate junk email and reclaim your inbox. Visit http://www.spammilter.com for details. > -----Original Message----- > From: centos-bounces at centos.org > [mailto:centos-bounces at centos.org] On Behalf Of Linux Advocate > Sent: Tuesday, June 02, 2009 10:23 PM > To: CentOS mailing list > Subject: [CentOS] Centos 5.3 -> Apache - Under Attack ? Oh hell.... > > > Guys, apache cpus usage is hitting 100% sometimes ( to such > an extent that its very noticeable) on a box with just 8 users or so. > > i m getting this when i run 'top'. The worrying thing is > seeing the work 'atack' under command > > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 23119 apache 15 0 964 556 472 S 0.7 0.0 0:03.68 atack > 23479 apache 15 0 964 556 472 S 0.7 0.0 0:01.94 atack > 22170 apache 15 0 964 560 472 S 0.3 0.0 0:05.23 atack > 22375 apache 15 0 964 560 472 S 0.3 0.0 0:04.21 atack > 22858 apache 15 0 964 560 472 S 0.3 0.0 0:02.87 atack > 22997 apache 15 0 964 560 472 S 0.3 0.0 0:04.11 atack > 22999 apache 15 0 964 560 472 S 0.3 0.0 0:02.22 atack > 23007 apache 15 0 964 560 472 S 0.3 0.0 0:03.79 atack > 23099 apache 15 0 964 556 472 S 0.3 0.0 0:02.18 atack > 23101 apache 15 0 964 556 472 S 0.3 0.0 0:02.48 atack > 23108 apache 15 0 964 556 472 S 0.3 0.0 0:03.59 atack > 23109 apache 15 0 964 556 472 S 0.3 0.0 0:02.75 atack > 23112 apache 15 0 972 504 412 S 0.3 0.0 0:04.70 atack > 23115 apache 15 0 964 556 472 S 0.3 0.0 0:03.75 atack > 23116 apache 15 0 964 556 472 S 0.3 0.0 0:02.80 atack > 23121 apache 15 0 972 504 412 S 0.3 0.0 0:03.79 atack > 23384 apache 15 0 964 556 472 S 0.3 0.0 0:01.63 atack > 23389 apache 15 0 964 556 472 S 0.3 0.0 0:03.52 atack > 23392 apache 15 0 964 556 472 S 0.3 0.0 0:01.61 atack > 23397 apache 15 0 964 556 472 S 0.3 0.0 0:01.62 atack > 23405 apache 15 0 964 556 472 S 0.3 0.0 0:03.64 atack > > When i 'ps -ef' i can see many lines as below; > > apache 24253 23378 0 10:54 ? 00:00:00 ./atack 100 > apache 24286 23378 0 10:59 ? 00:00:00 ./atack 100 > apache 24292 23378 0 11:00 ? 00:00:01 ./atack 100 > apache 24335 23378 0 11:01 ? 00:00:00 ./atack 100 > apache 24344 23378 0 11:01 ? 00:00:00 ./atack 100 > apache 24347 23378 0 11:02 ? 00:00:00 ./atack 100 > apache 24358 23378 0 11:04 ? 00:00:00 ./atack 100 > > > Hell, has my centos 5.3 box been hacked??? Help !!!!!!!!!! > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos