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.ddbiz
Launches processes:
- touch /lib/x86_64-linux-gnu/security/pam_sftp.so -r /lib/x86_64-linux-gnu/security/pam_userdb.so
- chattr -a /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so
- md5sum /usr/bin/ssh
- 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 -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
- chattr -e /etc /etc/infocmp /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
- dmesg -c > /dev/null
- /bin/echo > /var/log/kern.log
- chattr -e /etc /etc/infocmp /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 /etc/pam.d -r /etc/pam.d/login > /dev/null 2>&1
- dmesg -c
- /bin/echo > /var/log/messages
- 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
- chattr -i /etc /etc/infocmp /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
- chattr -i /etc /etc/infocmp /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 -a /etc /etc/infocmp /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
- md5sum /usr/bin/scp
- /usr/bin/biosdecoded.ddbiz
- touch /etc/pam.d/sshd -r /etc/pam.d/login > /dev/null 2>&1
- chattr -a /etc /etc/infocmp /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
- chattr -i /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so
- chattr -e /etc/pam.d/ /etc/pam.d/sshd /lib/x86_64-linux-gnu/security /lib/x86_64-linux-gnu/security/pam_sftp.so
- touch /etc/pam.d/su -r /etc/pam.d/login > /dev/null 2>&1
- touch /usr/bin/scp -r /usr/sbin/sshd
- touch /etc/pam.d -r /etc/pam.d/login
- /bin/rm -rf /usr/bin/biosdecoded.ddbiz
- touch /etc/pam.d/su -r /etc/pam.d/login
- touch /usr/bin/ssh -r /usr/sbin/sshd
- touch /etc/pam.d/sshd -r /etc/pam.d/login
- /bin/echo > /var/log/syslog
Performs operations with the file system:
Modifies file access rights:
- /usr/bin/ssh
- /usr/bin/scp
- /usr/bin/biosdecoded.ddbiz
- /usr/lib/x86_64-linux-gnu/security/pam_sftp.so
Creates or modifies files:
- /usr/bin/ssh
- /usr/bin/scp
- /usr/bin/biosdecoded.ddbiz
- /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:
- /usr/bin/ssh
- /usr/bin/scp
- /usr/bin/biosdecoded.ddbiz
- /usr/lib/x86_64-linux-gnu/security/pam_sftp.so
- /etc/pam.d/sshd
- /etc/pam.d
- /etc/pam.d/su
