Query: Sigma rule for Detects a Python process initiating a network connection. While this often relates to package installation, it can also
Matching passage: Sigma rule: Detects a Python process initiating a network connection. While this often relates to package installation, it can also. Logsource: windows / network_connection. Rule: title: Python Initiated Connection id: bef0bc5a-b9ae-425d-85c6-7b2d705980c6 status: test description: Detects a Python process initiating a network connection. While this often relates to package installation, it can also indicate a potential malicious script communicating with a C&C server. references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1046/T1046.md#atomic-test-4---port-scan-using-python - https://pypi.org/project/scapy/ author: frack113 date: 2021-12-10 modified: 2025-03-05 tags: - attack.discovery - attack.t1046 logsource: category: network_connection product: windows definition: 'Requirements: Field enrichment is required for the filters to work. As field such as CommandLine and ParentImage are not available by default on this event type' detection: selection: Initiated: 'true' Image|contains|all: - \python - .exe filter_optional_conda: ParentImage: C:\ProgramData\Anaconda3\Scripts\conda.exe CommandLine|contains|all: - :\ProgramData\Anaconda3\Scripts\conda-script.py - update filter_optional_conda_jupyter_notebook: ParentImage: C:\ProgramData\Anaconda3\python.exe CommandLine|contains: C:\ProgramData\Anaconda3\Scripts\jupyter-notebook-script.py filter_main_local_communication: DestinationIp: 127.0.0.1 SourceIp: 127.0.0.1 filter_main_pip: CommandLine|contains|all: - pip.exe - install condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Legitimate python scripts using the socket library or similar will trigger this. Apply additional filters and perform an initial baseline before deploying. level: medium
Near-miss passage: Sigma rule: Detects suspicious sub processes of web server processes. Logsource: linux / process_creation. Rule: title: Linux Webshell Indicators id: 818f7b24-0fba-4c49-a073-8b755573b9c7 status: test description: Detects suspicious sub processes of web server processes references: - https://www.acunetix.com/blog/articles/web-shells-101-using-php-introduction-web-shells-part-2/ - https://media.defense.gov/2020/Jun/09/2002313081/-1/-1/0/CSI-DETECT-AND-PREVENT-WEB-SHELL-MALWARE-20200422.PDF author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) date: 2021-10-15 modified: 2022-12-28 tags: - attack.persistence - attack.t1505.003 logsource: product: linux category: process_creation detection: selection_general: ParentImage|endswith: - /httpd - /lighttpd - /nginx - /apache2 - /node - /caddy selection_tomcat: ParentCommandLine|contains|all: - /bin/java - tomcat selection_websphere: ParentCommandLine|contains|all: - /bin/java - websphere sub_processes: Image|endswith: - /whoami - /ifconfig - /ip - /bin/uname - /bin/cat - /bin/crontab - /hostname - /iptables - /netstat - /pwd - /route condition: 1 of selection_* and sub_processes falsepositives: - Web applications that invoke Linux command line tools level: high