T1123: Audio Capture

Framework: MITRE ATT&CK · Tactic: Collection · Total Cataloged Families: 8 · Observed Samples: 1,683 · Primary Threat Categories: Rat · Spyware · Advanced Threat

Operational Executive Summary

T1123 (Audio Capture) is classified under the Collection tactic within the MITRE ATT&CK framework. Adversary tradecraft focused on gathering sensitive files, keystrokes, screen captures, audio, and database records prior to exfiltration. In telemetry gathered across enterprise endpoints and the EMBER 2018 benchmark, this technique was weaponized across 8 distinct malware families, totaling over 1,683 validated samples.

Technical Anatomy & Adversary Tradecraft

Adversaries leverage Audio Capture to accomplish operational objectives while minimizing anomalous forensic footprints. When executing Audio Capture, malicious binaries commonly interact directly with low-level Windows APIs, kernel mode drivers, or native scripting interfaces to bypass traditional file-integrity monitors and static antivirus signatures.

In modern multi-stage campaigns, T1123 is frequently observed functioning as an intermediate bridge: initial access payloads (such as spearphishing loaders or exploit macros) execute Audio Capture to establish in-memory execution or persistence before staging secondary ransomware or data-exfiltration implants.

Authoritative MITRE ATT&CK Reference: View official technique documentation, sub-techniques, and adversary groups at https://attack.mitre.org/techniques/T1123/.

Detection Engineering & Threat Hunting

Detecting Audio Capture requires telemetry correlation across endpoint detection and response (EDR) agents, Sysmon event streams, and security information event management (SIEM) pipelines:

Process Creation & Lineage: Monitor parent-child process anomalies where unexpected parent binaries (e.g., Office executables, web browsers, or script hosts) spawn command shells or native Windows utilities.
API Hooking & Behavioral Telemetry: EDR platforms should flag rapid calls to memory allocation, process injection, or registry manipulation APIs originating from unbacked executable memory regions.
Network Anomaly Correlation: Cross-reference endpoint execution timestamps with external network socket establishment to identify anomalous beaconing or covert data staging.

SOC Containment & Hardening Guidance

To mitigate risks associated with T1123 (Audio Capture) across production infrastructure, security teams should implement the following defensive controls:

Attack Surface Reduction (ASR): Enforce strict application control policies (WDAC or AppLocker) to restrict execution to signed and verified corporate binaries.
Least Privilege & Credential Hygiene: Restrict local administrative privileges to prevent adversaries from tampering with defensive agents or escalating privileges.
Network Microsegmentation: Restrict lateral communication across endpoint VLANs to prevent wormable payloads from utilizing Audio Capture across adjacent network segments.

→ Incident Response Guidance: Read our InfoStealer Protection & Remediation

Cataloged Malware Families Utilizing T1123 (8 Families)

The following malware families in the SystemHelpDesk catalog have been verified utilizing T1123 (Audio Capture):

8 families

Family	Category	Sample Count	Technical Summary
icecold_reloaded	Rat	`1,500`	IceCold Reloaded (cataloged across security software as Backdoor:Win32/IceCold.Reloaded, Trojan.Win32.IceCold, and Backdoor.IceCold) is a classical Delphi-based...
predator	Spyware	`120`	Predator is a premier commercial zero-day mercenary spyware platform engineered by Cytrox (part of the European surveillance consortium known as the Intellexa A...
candiru	Spyware	`45`	Candiru (operating under corporate entities Saito Tech Ltd, Taveta Ltd, and Grindavik Solutions) is an Israeli commercial cyber-surveillance contractor speciali...
babar	Advanced Threat	`14`	Trojan:Win32/Babar is a highly sophisticated, nation-state cyber-espionage implant attributed by international intelligence agencies and cybersecurity researche...
gh0st	Rat	`4`	Gh0st RAT (also tracked as Ghost RAT, Backdoor.Gh0st, and Win32/Gh0st) is one of the most historically significant, modular, and widely weaponized Remote Access...
lost_door	Rat	`Sampled`	Lost Door (cataloged across security software as Backdoor.LostDoor, Trojan.Win32.LostDoor, and Backdoor:Win32/LostDoor) is a classic Delphi-authored Remote Acce...
nuclear_rat	Rat	`Sampled`	Nuclear RAT (cataloged across security software as NuclearRAT, Nuclear RAT 2.1, Backdoor.NuclearRat, and Trojan.NuclearRAT) is a classic open-source Remote Acce...
stream_rat	Trojan	`Sampled`	Stream-RAT (also styled across security documentation as StreamRAT, Backdoor.StreamRAT, and Trojan.StreamRAT) is an early-to-mid 2000s Remote Access Trojan engi...