Globally uncommon IP address connection from a signed process

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
Detector Tags	Global Anomaly Analytics
ATT&CK Tactic	Stealth (TA0005), Command and Control (TA0011)
ATT&CK Technique	System Binary Proxy Execution (T1218), Application Layer Protocol (T1071)
Severity	Informational

Description

A signed process connected to an external IP address that, on a global level, it usually doesn't connect to.

Attacker's Goals

Attackers may use various methods to execute code in the context of a signed process to avoid detection.

Investigative actions

• Verify the destination IP address reputation.
• Check whether the actor process loaded a suspicious DLL before the alert.
• Check if the actor process was injected before the alert.
• Verify whether the process execution and connections are legitimate.

Variations

Globally uncommon IP address connection from an injected thread in a signed process

Synopsis

Field	Value
ATT&CK Tactic	Stealth (TA0005), Command and Control (TA0011)
ATT&CK Technique	System Binary Proxy Execution (T1218), Application Layer Protocol (T1071), Process Injection (T1055)
Severity	Medium

Description

An injected thread in a signed process connected to an external IP address that, on a global level, it usually doesn't connect to.

Attacker's Goals

Attackers may use various methods to execute code in the context of a signed process to avoid detection.

Investigative actions

• Verify the destination IP address reputation.
• Check whether the actor process loaded a suspicious DLL before the alert.
• Check if the actor process was injected before the alert.
• Verify whether the process execution and connections are legitimate.

Globally uncommon IP address connection from a signed process from a known vendor

Synopsis

Field	Value
ATT&CK Tactic	Stealth (TA0005), Command and Control (TA0011)
ATT&CK Technique	System Binary Proxy Execution (T1218), Application Layer Protocol (T1071)
Severity	Medium

Description

A signed process connected to an external IP address that, on a global level, it usually doesn't connect to.

Attacker's Goals

Attackers may use various methods to execute code in the context of a signed process to avoid detection.

Investigative actions

• Verify the destination IP address reputation.
• Check whether the actor process loaded a suspicious DLL before the alert.
• Check if the actor process was injected before the alert.
• Verify whether the process execution and connections are legitimate.

Globally uncommon and very rare IP address connection from a signed process

Synopsis

Field	Value
ATT&CK Tactic	Stealth (TA0005), Command and Control (TA0011)
ATT&CK Technique	System Binary Proxy Execution (T1218), Application Layer Protocol (T1071)
Severity	Low

Description

A signed process connected to an external IP address that, on a global level, it usually doesn't connect to.

Attacker's Goals

Attackers may use various methods to execute code in the context of a signed process to avoid detection.

Investigative actions

• Verify the destination IP address reputation.
• Check whether the actor process loaded a suspicious DLL before the alert.
• Check if the actor process was injected before the alert.
• Verify whether the process execution and connections are legitimate.