Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects potential network sniffing via use of network tools such as "tshark", "windump".
Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection.
An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection.
An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
PktMon.EXE Execution
Sigma
Detects execution of PktMon, a tool that captures network packets.
Detect the harvesting of wifi credentials using netsh.exe
PktMon.EXE Execution
Sigma
Detects execution of PktMon, a tool that captures network packets.
'This alerts when end to end encryption is disabled for Zoom meetings.'
The following analytic identifies the use of cleartext protocols that risk leaking sensitive information. It detects network traffic on legacy protocols such as Telnet (port 23), POP3 (port 110), IMAP (port 143), and non-anonymous FTP (port 21). The detection leverages the Network_Traffic data model to identify TCP traffic on these ports. Monitoring this activity is crucial as it can expose credentials and other sensitive data to interception. If confirmed malicious, attackers could capture authentication details, leading to unauthorized access and potential data breaches.
The analytic detects the initiation of traffic mirroring sessions on Cisco network devices. It leverages logs with specific mnemonics and facilities related to traffic mirroring, such as "ETH_SPAN_SESSION_UP" and "PKTCAP_START." This activity is significant because adversaries may use traffic mirroring to exfiltrate data by duplicating and forwarding network traffic to an external destination. If confirmed malicious, this could allow attackers to capture sensitive information, monitor network communications, and potentially compromise the integrity and confidentiality of the network.
Detects the execution of PowerShell scripts that use the 'Start-NetEventSession' cmdlet to initiate network event and packet capture. This activity can be leveraged by adversaries to sniff network traffic, potentially capturing sensitive information like user credentials, especially when transmitted over unencrypted protocols. This technique is often used for information gathering during an operation.
This rule detects the execution of common network sniffing tools, specifically 'tcpdump' or 'tshark', when they are invoked with arguments indicating an attempt to capture network traffic from a specific interface. The rule looks for the '-c' argument (for count) and the '-i' argument (for interface) in the command line, which are typical indicators of active network sniffing.
This rule detects the usage of cleartext protocols over a network by monitoring firewall logs for allowed connections to specific destination ports commonly associated with unencrypted services. These ports include HTTP (80, 8080), FTP (21), Telnet (23), and various database or application-specific ports (e.g., 1433, 3306, 1521, 27017, 50000, 11211, 15672, 5900-5904). The rule specifically looks for 'forward' or 'accept' actions, or connections not marked as 'blocked', indicating active cleartext communication. The primary goal is to identify potential credential exposure or sensitive data transmission over insecure channels.
Detects the usage of tooling to sniff network traffic. An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
This rule detects the installation of packet capture (pcap) drivers on Windows systems by monitoring Event ID 4697 (A service was installed in the system). The detection logic specifically looks for common filenames associated with pcap drivers such as 'pcap', 'npcap', 'npf', 'nm3', 'ndiscap', 'nmnt', 'windivert', 'USBPcap', and 'pktmon' within the ServiceFileName field. The installation of such drivers can indicate an adversary's attempt to perform network sniffing.
This rule identifies activities related to Google Cloud Platform (GCP) Packet Mirroring. Packet Mirroring allows capturing full network traffic, which can be abused by adversaries to intercept and collect sensitive data from unencrypted internal network communications. The rule specifically looks for various API calls related to the creation, modification, deletion, or listing of Packet Mirroring configurations.
This rule detects when a monitor, SPAN (Switched Port Analyzer), or RSPAN (Remote Switched Port Analyzer) is configured or modified on a Cisco network device. These configurations are often used for network sniffing or traffic analysis, which can be legitimate for troubleshooting but also abused by adversaries for data exfiltration or reconnaissance.
Detects potential network sniffing via use of network tools such as "tshark", "windump". Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection. An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
Detects the execution of 'netsh.exe' with the 'trace' and 'start' flags, indicating that a network trace capture has been initiated. This activity can be used by adversaries for network sniffing to gather information about the environment, including credentials or network configurations.
Detects the usage of tooling to sniff network traffic.
An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
Detects the execution of netsh with the "trace" flag in order to start a network capture
Detect the harvesting of wifi credentials using netsh.exe
Detects potential network sniffing via use of network tools such as "tshark", "windump".
Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection.
An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection.
An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
PktMon.EXE Execution
Sigma
Detects execution of PktMon, a tool that captures network packets.
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