Suspicious Activity in Shell Commands

Title: Suspicious Activity in Shell Commands
Status: test
Description:Detects suspicious shell commands used in various exploit codes (see references)
References:
  -https://web.archive.org/web/20170319121015/http://www.threatgeek.com/2017/03/widespread-exploitation-attempts-using-cve-2017-5638.html
  -https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/modules/exploits/multi/http/struts_code_exec_exception_delegator.rb
  -http://pastebin.com/FtygZ1cg
  -https://artkond.com/2017/03/23/pivoting-guide/
Author: Florian Roth (Nextron Systems)
Date: 2017-08-21
modified:2021-11-27
Tags:

• -'attack.execution'
• -'attack.t1059.004'

Logsource:

• product: linux

Detection:
  keywords:
    - 'wget * - http* | perl'
    - 'wget * - http* | sh'
    - 'wget * - http* | bash'
    - 'python -m SimpleHTTPServer'
    - '-m http.server'
    - 'import pty; pty.spawn*'
    - 'socat exec:*'
    - 'socat -O /tmp/*'
    - 'socat tcp-connect*'
    - '*echo binary >>*'
    - '*wget *; chmod +x*'
    - '*wget *; chmod 777 *'
    - '*cd /tmp || cd /var/run || cd /mnt*'
    - '*stop;service iptables stop;*'
    - '*stop;SuSEfirewall2 stop;*'
    - 'chmod 777 2020*'
    - '*>>/etc/rc.local'
    - '*base64 -d /tmp/*'
    - '* | base64 -d *'
    - '*/chmod u+s *'
    - '*chmod +s /tmp/*'
    - '*chmod u+s /tmp/*'
    - '* /tmp/haxhax*'
    - '* /tmp/ns_sploit*'
    - 'nc -l -p *'
    - 'cp /bin/ksh *'
    - 'cp /bin/sh *'
    - '* /tmp/*.b64 *'
    - '*/tmp/ysocereal.jar*'
    - '*/tmp/x *'
    - '*; chmod +x /tmp/*'
    - '*;chmod +x /tmp/*'
  condition:keywords
Falsepositives:
  -Unknown
Level: high