Techniques
Sample rules
Cisco NVM - Installation of Typosquatted Python Package
- source: splunk
- technicques:
- T1059
Description
This analytic detects suspicious python package installations where the package name resembles popular Python libraries but may be typosquatted or slightly altered.
Typosquatting is a common technique used by attackers to trick users into installing malicious packages that mimic legitimate ones.
This detection leverages Cisco NVM flow telemetry and checks for pip or poetry package managers with the “install” or “add” flags, making outbound connections to package repository such as pypi.org
with known or suspected typo package names.
Detection logic
`cisco_network_visibility_module_flowdata`
dest_hostname IN ("*.pythonhosted.org", "*pypi.org", "*python-poetry.org")
(
(process_arguments = "*pip*" process_arguments = "*install*")
OR
(process_arguments = "*poetry*" process_arguments = "*add*")
)
| rex field=process_arguments "(?i)(?:pip
|poetry)[^
|]*?\s+(?:install
|add)\s+(?P<package_name>[^\s\"']+)$"
| lookup typo_squatted_python_packages
typosquatted_package_name as package_name
OUTPUTNEW comment package_official_url
| where isnotnull(comment)
| stats count min(_time) as firstTime max(_time) as lastTime
values(parent_process_arguments) as parent_process_arguments
values(process_arguments) as process_arguments
values(parent_process_hash) as parent_process_hash
values(process_hash) as process_hash
values(module_name_list) as module_name_list
values(module_hash_list) as module_hash_list
values(dest_port) as dest_port
values(aliul) as additional_logged_in_users_list
values(dest_hostname) as dest_hostname
by src dest parent_process_path parent_process_integrity_level process_path process_name process_integrity_level process_id transport package_name comment package_official_url
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| table firstTime lastTime src dest_hostname dest dest_port transport package_name comment package_official_url
parent_process_integrity_level parent_process_path parent_process_arguments parent_process_hash
process_integrity_level process_path process_name process_arguments process_hash process_id
additional_logged_in_users_list module_name_list module_hash_list
| `cisco_nvm___installation_of_typosquatted_python_package_filter`