sigmahighHunting

Equation Group Indicators

Detects suspicious shell commands used in various Equation Group scripts and tools

MITRE ATT&CK

execution

Detection Query

keywords:
  - "chown root*chmod 4777 "
  - cp /bin/sh .;chown
  - chmod 4777 /tmp/.scsi/dev/bin/gsh
  - chown root:root /tmp/.scsi/dev/bin/
  - chown root:root x;
  - /bin/telnet locip locport < /dev/console | /bin/sh
  - /tmp/ratload
  - "ewok -t "
  - "xspy -display "
  - cat > /dev/tcp/127.0.0.1/80 <<END
  - rm -f /current/tmp/ftshell.latest
  - "ghost_* -v "
  - " --wipe > /dev/null"
  - ping -c 2 *; grep * /proc/net/arp >/tmp/gx
  - iptables * OUTPUT -p tcp -d 127.0.0.1 --tcp-flags RST RST -j DROP;
  - "> /var/log/audit/audit.log; rm -f ."
  - cp /var/log/audit/audit.log .tmp
  - sh >/dev/tcp/* <&1 2>&1
  - ncat -vv -l -p * <
  - nc -vv -l -p * <
  - < /dev/console | uudecode && uncompress
  - sendmail -osendmail;chmod +x sendmail
  - /usr/bin/wget -O /tmp/a http* && chmod 755 /tmp/cron
  - chmod 666 /var/run/utmp~
  - chmod 700 nscd crond
  - cp /etc/shadow /tmp/.
  - </dev/console |uudecode > /dev/null 2>&1 && uncompress
  - chmod 700 jp&&netstat -an|grep
  - uudecode > /dev/null 2>&1 && uncompress -f * && chmod 755
  - chmod 700 crond
  - wget http*; chmod +x /tmp/sendmail
  - chmod 700 fp sendmail pt
  - chmod 755 /usr/vmsys/bin/pipe
  - chmod -R 755 /usr/vmsys
  - chmod 755 $opbin/*tunnel
  - chmod 700 sendmail
  - chmod 0700 sendmail
  - /usr/bin/wget http*sendmail;chmod +x sendmail;
  - "&& telnet * 2>&1 </dev/console"
condition: keywords

Author

Florian Roth (Nextron Systems)

Created

2017-04-09

Data Sources

linux

Platforms

linux

References

https://medium.com/@shadowbrokerss/dont-forget-your-base-867d304a94b1

Tags

attack.executionattack.g0020attack.t1059.004

Raw Content

title: Equation Group Indicators
id: 41e5c73d-9983-4b69-bd03-e13b67e9623c
status: test
description: Detects suspicious shell commands used in various Equation Group scripts and tools
references:
    - https://medium.com/@shadowbrokerss/dont-forget-your-base-867d304a94b1
author: Florian Roth (Nextron Systems)
date: 2017-04-09
modified: 2021-11-27
tags:
    - attack.execution
    - attack.g0020
    - attack.t1059.004
logsource:
    product: linux
detection:
    keywords:
        # evolvingstrategy, elgingamble, estesfox
        - 'chown root*chmod 4777 '
        - 'cp /bin/sh .;chown'
        # tmpwatch
        - 'chmod 4777 /tmp/.scsi/dev/bin/gsh'
        - 'chown root:root /tmp/.scsi/dev/bin/'
        # estesfox
        - 'chown root:root x;'
        # ratload
        - '/bin/telnet locip locport < /dev/console | /bin/sh'
        - '/tmp/ratload'
        # ewok
        - 'ewok -t '
        # xspy
        - 'xspy -display '
        # elatedmonkey
        - 'cat > /dev/tcp/127.0.0.1/80 <<END'
        # ftshell
        - 'rm -f /current/tmp/ftshell.latest'
        # ghost
        - 'ghost_* -v '
        # morerats client
        - ' --wipe > /dev/null'
        # noclient
        - 'ping -c 2 *; grep * /proc/net/arp >/tmp/gx'
        - 'iptables * OUTPUT -p tcp -d 127.0.0.1 --tcp-flags RST RST -j DROP;'
        # auditcleaner
        - '> /var/log/audit/audit.log; rm -f .'
        - 'cp /var/log/audit/audit.log .tmp'
        # reverse shell
        - 'sh >/dev/tcp/* <&1 2>&1'
        # packrat
        - 'ncat -vv -l -p * <'
        - 'nc -vv -l -p * <'
        # empty bowl
        - '< /dev/console | uudecode && uncompress'
        - 'sendmail -osendmail;chmod +x sendmail'
        # echowrecker
        - '/usr/bin/wget -O /tmp/a http* && chmod 755 /tmp/cron'
        # dubmoat
        - 'chmod 666 /var/run/utmp~'
        # poptop
        - 'chmod 700 nscd crond'
        # abopscript
        - 'cp /etc/shadow /tmp/.'
        # ys
        - '</dev/console |uudecode > /dev/null 2>&1 && uncompress'
        # jacktelnet
        - 'chmod 700 jp&&netstat -an|grep'
        # others
        - 'uudecode > /dev/null 2>&1 && uncompress -f * && chmod 755'
        - 'chmod 700 crond'
        - 'wget http*; chmod +x /tmp/sendmail'
        - 'chmod 700 fp sendmail pt'
        - 'chmod 755 /usr/vmsys/bin/pipe'
        - 'chmod -R 755 /usr/vmsys'
        - 'chmod 755 $opbin/*tunnel'
        - 'chmod 700 sendmail'
        - 'chmod 0700 sendmail'
        - '/usr/bin/wget http*sendmail;chmod +x sendmail;'
        - '&& telnet * 2>&1 </dev/console'
    condition: keywords
falsepositives:
    - Unknown
level: high