ubuntu sever got hacked find out how

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Bids
21
Avg Bid (USD)
$128
Project Budget (USD)
$30 - $250

Project Description:
found this atttached script file hidden in a jar archive on my server.
addtionally its in root.
tell me if its sending data somewhere what it is doing and
help me close the security hole + remove this.

Skills required:
Computer Security, Linux, Perl, System Admin, Web Security
Additional Files: udp.pl
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Project posted by:
veroca01 Austria
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