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Top Forums UNIX for Dummies Questions & Answers Activity Tracing - Using sendmail. Post 302422793 by abvh on Wednesday 19th of May 2010 11:55:55 AM
Old 05-19-2010
Error Activity Tracing - Using sendmail.

Code:
uname -a output
Linux server.domain.com 2.6.9-67.0.15.ELsmp #1 SMP Tue Apr 22 13:50:33 EDT 2008 i686 i686 i386 GNU/Linux

At our company, we have hundreds of employees that access this server for reporting purposes.

However, someone was familiar enough with sendmail and used it to send an email that was crafted to look like it came from a specific person and was sent to the entire company with private information. Huge security concern.

I have been tasked with helping figure out this spoof. Here is what I need to figure out.

The mail was sent at 11:12PM on May 17th.

I need to find the IP address of the system that made a shell/terminal connection to the server around this time and used the sendmail command to send an email to a specific mailing list.

Any ideas ? I'm not entirely familiar with logging yet. The mail log file doesn't seem to provide much useful information.

Last edited by Yogesh Sawant; 05-24-2010 at 03:20 AM.. Reason: added code tags
 

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mailstats(8)						      System Manager's Manual						      mailstats(8)

NAME
mailstats - Displays statistics about mail traffic SYNOPSIS
mailstats [-o] [-C cffile [-f stfile] FLAGS
Do not display the name of the mailer in the output. Use cffile as the name of the sendmail "cf" file instead of /var/adm/sendmail/send- mail.cf. Use stfile as the input statistics file instead of /var/adm/sendmail/sendmail.st. DESCRIPTION
The mailstats command reads the information in the /var/adm/sendmail/sendmail.st file (or in the file specified with the -f flag), formats it, and writes it to standard output. Note also that you can change the location of the sendmail.st file by editing its pathname in the sendmail.cf file. EXAMPLES
The format of the information is shown in the following example, in which the first field (M) contains a number that indicates the position of that mailer in the sendmail.cf file, starting at 0 (zero). For example, the first mailer in the sendmail.cf file corresponds to the number 0 in the mailstats display, the second mailer corresponds to the number 1, and so on. Statistics from Thu Feb 17 11:20:01 2000 M msgsfr bytes_from msgsto bytes_to msgsrej msgsdis Mailer 1 50 77K 1 3K 0 0 local 6 43 59K 58 99K 0 0 smtp ============================================================ T 93 136K 59 102K 0 0 The fields in the report have the following meanings: Indicates the position of the mailer in the sendmail.cf file. Indicates the number of messages received by the local machine from the indicated mailer. Indicates the number of bytes in the messages received by the local machine from the indicated mailer. Indicates the number of messages sent from the local machine using the indicated mailer. Indicates the number of bytes in the messages sent from the local machine using the indicated mailer. Indicates the number of rejected messages. Indicates the number of discarded messages. Indicates the name of the mailer. If sendmail transmits mail directly to a file, such as the dead.letter file or an alias target, the message and byte counts are credited to the prog mailer, as defined in the sendmail.cf file. However, mailstats will still default to var/adm/sendmail/sendmail.st. FILES
Specifies the command path Contains system statistics Contains configuration information for sendmail RELATED INFORMATION
Commands: sendmail(8) delim off mailstats(8)
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