Query: alert when Detect unix shell configuration modification. Adversaries may establish persistence through executing malicious commands
Matching passage: Sigma rule: Detect unix shell configuration modification. Adversaries may establish persistence through executing malicious commands. Logsource: linux / auditd. Rule: title: Unix Shell Configuration Modification id: a94cdd87-6c54-4678-a6cc-2814ffe5a13d related: - id: e74e15cc-c4b6-4c80-b7eb-dfe49feb7fe9 type: obsolete status: test description: Detect unix shell configuration modification. Adversaries may establish persistence through executing malicious commands triggered when a new shell is opened. references: - https://objective-see.org/blog/blog_0x68.html - https://web.archive.org/web/20221204161143/https://www.glitch-cat.com/p/green-lambert-and-attack - https://www.anomali.com/blog/pulling-linux-rabbit-rabbot-malware-out-of-a-hat author: Peter Matkovski, IAI date: 2023-03-06 modified: 2023-03-15 tags: - attack.privilege-escalation - attack.persistence - attack.t1546.004 logsource: product: linux service: auditd detection: selection: type: PATH name: - /etc/shells - /etc/profile - /etc/profile.d/* - /etc/bash.bashrc - /etc/bashrc - /etc/zsh/zprofile - /etc/zsh/zshrc - /etc/zsh/zlogin - /etc/zsh/zlogout - /etc/csh.cshrc - /etc/csh.login - /root/.bashrc - /root/.bash_profile - /root/.profile - /root/.zshrc - /root/.zprofile - /home/*/.bashrc - /home/*/.zshrc - /home/*/.bash_profile - /home/*/.zprofile - /home/*/.profile - /home/*/.bash_login - /home/*/.bash_logout - /home/*/.zlogin - /home/*/.zlogout condition: selection falsepositives: - Admin or User activity are expected to generate some false positives level: medium
Near-miss passage: Sigma rule: Detects uncommon outbound network activity via Kerberos default port indicating possible lateral movement or first stage. Logsource: windows / security. Rule: title: Uncommon Outbound Kerberos Connection - Security id: eca91c7c-9214-47b9-b4c5-cb1d7e4f2350 related: - id: e54979bd-c5f9-4d6c-967b-a04b19ac4c74 type: similar status: test description: 'Detects uncommon outbound network activity via Kerberos default port indicating possible lateral movement or first stage PrivEsc via delegation. ' references: - https://github.com/GhostPack/Rubeus author: Ilyas Ochkov, oscd.community date: 2019-10-24 modified: 2024-03-15 tags: - attack.lateral-movement - attack.credential-access - attack.t1558.003 logsource: product: windows service: security detection: selection: EventID: 5156 DestPort: 88 filter_main_lsass: Application|startswith: - \device\harddiskvolume - 'C:' Application|endswith: \Windows\System32\lsass.exe filter_optional_chrome: Application|startswith: - \device\harddiskvolume - 'C:' Application|endswith: - \Program Files (x86)\Google\Chrome\Application\chrome.exe - \Program Files\Google\Chrome\Application\chrome.exe filter_optional_firefox: Application|startswith: - \device\harddiskvolume - 'C:' Application|endswith: - \Program Files (x86)\Mozilla Firefox\firefox.exe - \Program Files\Mozilla Firefox\firefox.exe filter_optional_tomcat: Application|endswith: \tomcat\bin\tomcat8.exe condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Web Browsers and third party application might generate similar activity. An initial baseline is required. level: medium