A suspicious direct syscall was executed

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 with eXtended Threat Hunting (XTH)
Detector Tags	Direct Syscall Analytics
ATT&CK Tactic	Execution (TA0002)
ATT&CK Technique	Native API (T1106)
Severity	Low

Description

A suspicious direct syscall was executed.

Attacker's Goals

An attacker might try to use direct syscalls to evade detection from a legitimate program.

Investigative actions

• Investigate the direct syscall-mapped image to verify if it is malicious.
• Check if this direct syscall is part of the process execution flow.

Variations

A suspicious direct syscall was executed by unsigned process from a user folder

Synopsis

Field	Value
ATT&CK Tactic	Execution (TA0002)
ATT&CK Technique	Native API (T1106)
Severity	High

Description

A suspicious direct syscall was executed by unsigned process from a user folder.

Attacker's Goals

An attacker might try to use direct syscalls to evade detection from a legitimate program.

Investigative actions

• Investigate the direct syscall-mapped image to verify if it is malicious.
• Check if this direct syscall is part of the process execution flow.

A suspicious direct syscall was executed by a DLL host application

Synopsis

Field	Value
ATT&CK Tactic	Execution (TA0002)
ATT&CK Technique	Native API (T1106)
Severity	Medium

Description

A suspicious direct syscall was executed by a DLL host application.

Attacker's Goals

An attacker might try to use direct syscalls to evade detection from a legitimate program.

Investigative actions

• Investigate the direct syscall-mapped image to verify if it is malicious.
• Check if this direct syscall is part of the process execution flow.