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Linux.Siggen.5920

Aggiunto al database dei virus Dr.Web: 2023-10-23

La descrizione è stata aggiunta:

Technical Information

Malicious functions:
Launches itself as a daemon
Performs process tracing:
  • swapper/0
Removes the following system files:
  • /usr/bin/ssh
  • /usr/bin/scp
  • /usr/bin/biosdecoded.pffsq
Launches processes:
  • chattr -i /usr/bin /usr/bin/ssh /usr/bin/scp /lib/udev /etc /etc/pam.d /etc/pam.d/system-auth-ac /etc/pam.d/password-auth-ac > /dev/null 2>&1
  • chattr -e /usr/bin /usr/bin/ssh /usr/bin/scp /lib/udev /etc /etc/pam.d /etc/pam.d/system-auth-ac /etc/pam.d/password-auth-ac > /dev/null 2>&1
  • touch /etc/pam.d/sshd -r /etc/pam.d/login > /dev/null 2>&1
  • touch /etc/pam.d/su -r /etc/pam.d/login
  • /bin/rm -rf /usr/bin/biosdecoded.pffsq
  • /bin/echo > /var/log/syslog
  • touch /lib/x86_64-linux-gnu/security/pam_sftp.so -r /lib/x86_64-linux-gnu/security/pam_userdb.so
  • chattr -i /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so
  • touch /usr/bin/scp -r /usr/sbin/sshd
  • chattr -e /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so
  • chattr -e /usr/bin /usr/bin/ssh /usr/bin/scp /lib/udev /etc /etc/pam.d /etc/pam.d/system-auth-ac /etc/pam.d/password-auth-ac
  • /usr/bin/biosdecoded.pffsq
  • touch /etc/pam.d/sshd -r /etc/pam.d/login
  • dmesg -c > /dev/null
  • md5sum /usr/bin/ssh
  • touch /etc/pam.d -r /etc/pam.d/login > /dev/null 2>&1
  • chattr -e /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so > /dev/null 2>&1
  • chattr -a /usr/bin /usr/bin/ssh /usr/bin/scp /lib/udev /etc /etc/pam.d /etc/pam.d/system-auth-ac /etc/pam.d/password-auth-ac
  • touch /usr/bin/ssh -r /usr/sbin/sshd
  • /bin/echo > /var/log/kern.log
  • touch /etc/pam.d/su -r /etc/pam.d/login > /dev/null 2>&1
  • chattr -a /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so > /dev/null 2>&1
  • /bin/echo
  • md5sum /usr/bin/scp
  • chattr -i /usr/bin /usr/bin/ssh /usr/bin/scp /lib/udev /etc /etc/pam.d /etc/pam.d/system-auth-ac /etc/pam.d/password-auth-ac
  • /bin/echo > /var/log/messages
  • chattr -a /usr/bin /usr/bin/ssh /usr/bin/scp /lib/udev /etc /etc/pam.d /etc/pam.d/system-auth-ac /etc/pam.d/password-auth-ac > /dev/null 2>&1
  • touch /etc/pam.d -r /etc/pam.d/login
  • chattr -a /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so
  • dmesg -c
  • chattr -i /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so > /dev/null 2>&1
Performs operations with the file system:
Modifies file access rights:
  • /usr/bin/ssh
  • /usr/bin/scp
  • /usr/bin/biosdecoded.pffsq
  • /usr/lib/x86_64-linux-gnu/security/pam_sftp.so
Creates folders:
  • /usr/lib/udev/collectd
Creates or modifies files:
  • /usr/lib/udev/collectd/mcpuinfo.ko
  • /usr/lib/udev/collectd/kmeminfo.ko
  • /usr/bin/ssh
  • /usr/bin/scp
  • /usr/bin/biosdecoded.pffsq
  • /var/log/messages
  • /var/log/syslog
  • /var/log/kern.log
  • /usr/lib/x86_64-linux-gnu/security/pam_sftp.so
  • /etc/pam.d/sshd
  • /etc/pam.d
  • /etc/pam.d/su
Deletes files:
  • /etc/pam.d/sshd
  • /etc/pam.d/su
Changes time of creation/access/modification of files:
  • /lib/udev/collectd/mcpuinfo.ko
  • /lib/udev/collectd/kmeminfo.ko
  • /lib/udev/collectd
  • /usr/bin/ssh
  • /usr/bin/scp
  • /usr/bin/biosdecoded.pffsq
  • /usr/lib/x86_64-linux-gnu/security/pam_sftp.so
  • /etc/pam.d/sshd
  • /etc/pam.d
  • /etc/pam.d/su

Curing recommendations


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