Over the last several months we have on more than one occasion uncovered a
number of Trojans that appear to be seeking corporate information, sending that
over a chat session to/through several European sites and downloading
additional programs to the infected computer. Here's a short synopsis of the
type of conversations one of our people uncovered on a laptop on the network:
Contacts 203.121.73.136 on port TCP/17555. IRC commands were sent to the
workstation to run a command "staticftp" 70.84.109.84 to download a program
x.exe.
Instructed to launch 5 scans (netapi on port 137, wkssvc port 445, asn on port
445, dcom on port 135 and lsass on port 445).
Connects to 66.36.243.116 on TCP/80 and starts a PHP-based conversation, giving
the workstation credentials to the host and receiving the following
information:
CARGO:smtp_purple;
MOD:smtp;
PATH:http://niuqennaois.com/s2.5.exe;
SERVER:209.160.64.216;
REFRESH:2700;KEY:864a1bae77fc8053055d02550ed7b49c;
Connects to 195.49.141.23 on TCP/3144, retrieving unreadable data
Connects to 66.36.243.116 on TCP/80, exchanging credentials via PHP:
To host:
uuid <wsname>_547611528
wv mag5_min0_build2195_Service_Pack_4
cargo
check purple
To workstation:
REFRESH:3600;
KEY: 864a1bae77fc8053055d02550ed7b49c;
HTTP connections are made to 66.45.232.66, 66.36.243.116 to perform similar PHP
and download conversations.
Three way TCP handshakes are attempted to 74.52.53.66, 68.142.212.41and
68.142.212.93 on TCP/80, but no further conversation was made.
My questions are:
1. Are other folks in the community seeing this kind of activity?
2. What, aside from deleting what you can find what other actions are
recommended/required?
Who, if anyone, in the community or law enforcement should be notified?
If this post should be somewhere else, please let me know.
Thanks,
Richard Goetz
IT Security Officer
Kronos, Incorporated
Phone: 978-947-2819
Fax: 978-256-3919
RGoetz@Kronos.com
Experts at Improving the Performance of People and Business
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