Abnormal network communication through TOR using an uncommon port

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent
ATT&CK Tactic	Command and Control (TA0011)
ATT&CK Technique	Application Layer Protocol (T1071), Non-Standard Port (T1571)
Severity	Low

Description

Suspicious connection from a known TOR IP to an uncommon port.

Attacker's Goals

Attackers might use TOR IP combined with random ports.to hide C2 inbound communication from inside a host.

Investigative actions

Investigate the network configuration related to the participating port. Investigate processes that were listening to that port.

Variations

Abnormal network communication through TOR using an uncommon port and App-id

Synopsis

Field	Value
ATT&CK Tactic	Command and Control (TA0011)
ATT&CK Technique	Application Layer Protocol (T1071), Non-Standard Port (T1571)
Severity	Low

Description

Suspicious connection from a known TOR IP to an uncommon port and App-id.

Attacker's Goals

Attackers might use TOR IP combined with random ports.to hide C2 inbound communication from inside a host.

Investigative actions

Investigate the network configuration related to the participating port. Investigate processes that were listening to that port.

Abnormal network communication through TOR using a suspicious port

Synopsis

Field	Value
ATT&CK Tactic	Command and Control (TA0011)
ATT&CK Technique	Application Layer Protocol (T1071), Non-Standard Port (T1571)
Severity	Low

Description

Suspicious connection from a known TOR IP to an uncommon potential C2 communication port.

Attacker's Goals

Attackers might use TOR IP combined with random ports.to hide C2 inbound communication from inside a host.

Investigative actions

Investigate the network configuration related to the participating port. Investigate processes that were listening to that port.