www-data sending spam mail hot to stop this?

www-data@domain name U=www-data P=local S=2299 2015-07-08 16:34:28 1ZCn9Q-0003u1-SL cram_md5 authenticator failed H=smtp-********* [...] Error: authentication failed: authentication failure 2015-07-08 16:34:29 1ZCn9Q-0003u1-SL => R=smarthost T=remote_smtp_smarthost H=smtp***...*.* [] X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="serialNumber=ds1qY45ldiSbrKEu29LdIyx57hEV0mpa,C=IN,ST=----------,L=--------i,O=-----------------,OU=--------------------------------,CN=.domain name" 2015-07-08 16:34:29 1ZCn9Q-0003u1-SL Completed

repeatadely going mails to different idies plz help i am newbie to exim. and linux also

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This question was answered by @JonsJava:

One of your scripts on your website has been compromised.

let’s find the culprit. If you started getting this a day ago:

find /var/www/ -mtime -1

This will find all files modified in the last day

Change the “-1” to the number of days this has been going on

Also, try this:

fgrep "base64_decode" /var/www/ -R|grep "eval"

This won’t catch them all, and there will be false positives, but it’s a place to start.

Also, stop postfix until you resolve this issue.

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