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Linux.Siggen.292

Added to the Dr.Web virus database: 2017-11-10

Virus description added:

Technical Information

Malicious functions:
Gains root privileges
Launches itself as a daemon
Launches processes:
  • cat vuln.txt
  • mail -s ih vrajealla123@yahoo.com
  • /usr/sbin/sendmail send-mail -i -- vrajealla123@yahoo.com
  • /usr/sbin/exim4 -Mc 1eD3iU-0000B8-CE
  • /usr/sbin/exim4 #-E1eD3iU-0000B8-CE
  • /usr/sbin/exim4 -Mc 1eD3iV-0000BC-EQ
Performs operations with the file system:
Modifies file access rights:
  • /var/spool/exim4/input/1eD3iU-0000B8-CE-D
  • /var/spool/exim4/input/hdr.690
  • /var/spool/exim4/msglog/1eD3iU-0000B8-CE
  • /var/spool/exim4/input/1eD3iV-0000BC-EQ-D
  • /var/spool/exim4/input/hdr.694
  • /var/spool/exim4/input/hdr.692
  • /var/spool/exim4/msglog/1eD3iV-0000BC-EQ
  • /var/spool/exim4/input/1eD3iV-0000BC-EQ-J
  • /var/mail/user
Creates symlinks:
  • /var/mail/user.lock
Creates or modifies files:
  • /tmp/mail.RsXXXXSdf1Lh
  • /tmp/mail.RsXXXXhsa4Yi
  • /tmp/mail.RsXXXXhsa4Yi (deleted)
  • /var/spool/exim4/input//1eD3iU-0000B8-CE-D
  • /var/spool/exim4/input/1eD3iU-0000B8-CE-D
  • /var/spool/exim4/input//hdr.690
  • /var/spool/exim4/input/hdr.690
  • /var/spool/exim4/msglog//1eD3iU-0000B8-CE
  • /var/spool/exim4/msglog/1eD3iU-0000B8-CE
  • /var/log/exim4/mainlog
  • /var/spool/exim4/db/retry.lockfile
  • /var/spool/exim4/input//1eD3iV-0000BC-EQ-D
  • /var/spool/exim4/input/1eD3iV-0000BC-EQ-D
  • /var/spool/exim4/input//hdr.694
  • /var/spool/exim4/input/hdr.694
  • /var/spool/exim4/msglog//1eD3iV-0000BC-EQ
  • /var/spool/exim4/msglog/1eD3iV-0000BC-EQ
  • /var/spool/exim4/input//hdr.692
  • /var/spool/exim4/input/hdr.692
  • /var/spool/exim4/input//1eD3iV-0000BC-EQ-J
  • /var/mail/user.lock.box-i386.5a0554cc.000002ba
  • /var/mail/user
  • /var/spool/exim4/input/1eD3iV-0000BC-EQ-J
Deletes files:
  • /tmp/mail.RsXXXXSdf1Lh
  • /tmp/mail.RsXXXXhsa4Yi
  • /var/spool/exim4/msglog//1eD3iU-0000B8-CE
  • /var/spool/exim4/input//1eD3iU-0000B8-CE-D
  • /var/spool/exim4/input//1eD3iU-0000B8-CE-H
  • /var/spool/exim4/input//1eD3iU-0000B8-CE-J
  • /var/mail/user.lock.box-i386.5a0554cc.000002ba
  • /var/mail/user.lock
  • /var/spool/exim4/msglog//1eD3iV-0000BC-EQ
  • /var/spool/exim4/input//1eD3iV-0000BC-EQ-D
  • /var/spool/exim4/input//1eD3iV-0000BC-EQ-H
  • /var/spool/exim4/input//1eD3iV-0000BC-EQ-J
Network activity:
Establishes connection:
  • <LOCAL_DNS_SERVER>
DNS ASK:
  • bo##i386
Other:
Collects CPU information

Curing recommendations

Linux

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