An adversary can leverage a computer's peripheral devices (e.g., integrated cameras or webcams) or applications (e.g., video call services) to capture video recordings for the purpose of gathering information. Images may also be captured from devices or applications, potentially in specified intervals, in lieu of video files.
Malware or scripts may be used to interact with the devices through an available API provided by the operating system or an application to capture video or images. Video or image files may be written to disk and exfiltrated later. This technique differs from Screen Capture due to use of specific devices or applications for video recording rather than capturing the victim's screen.
In macOS, there are a few different malware samples that record the user's webcam such as FruitFly and Proton. 
This type of attack technique cannot be easily mitigated with preventive controls since it is based on the abuse of system features.
Detection of this technique may be difficult due to the various APIs that may be used. Telemetry data regarding API use may not be useful depending on how a system is normally used, but may provide context to other potentially malicious activity occurring on a system.
Behavior that could indicate technique use include an unknown or unusual process accessing APIs associated with devices or software that interact with the video camera, recording devices, or recording software, and a process periodically writing files to disk that contain video or camera image data.
- Patrick Wardle. (n.d.). Retrieved March 20, 2018.
- The DigiTrust Group. (2017, January 12). The Rise of Agent Tesla. Retrieved November 5, 2018.
- Brumaghin, E., et al. (2018, October 15). Old dog, new tricks - Analysing new RTF-based campaign distributing Agent Tesla, Loki with PyREbox. Retrieved November 5, 2018.
- Galperin, E., Et al.. (2016, August). I Got a Letter From the Government the Other Day.... Retrieved April 25, 2018.
- Yadav, A., et al. (2017, August 31). Cobian RAT – A backdoored RAT. Retrieved November 13, 2018.
- TrendMicro. (2014, September 03). DARKCOMET. Retrieved November 6, 2018.
- Kujawa, A. (2018, March 27). You dirty RAT! Part 1: DarkComet. Retrieved November 6, 2018.
- FireEye. (2018, March 16). Suspected Chinese Cyber Espionage Group (TEMP.Periscope) Targeting U.S. Engineering and Maritime Industries. Retrieved April 11, 2018.
- Schroeder, W., Warner, J., Nelson, M. (n.d.). Github PowerShellEmpire. Retrieved April 28, 2016.
- PwC and BAE Systems. (2017, April). Operation Cloud Hopper: Technical Annex. Retrieved April 13, 2017.
- Carr, N., et al. (2018, August 01). On the Hunt for FIN7: Pursuing an Enigmatic and Evasive Global Criminal Operation. Retrieved August 23, 2018.
- Department of Justice. (2018, August 01). HOW FIN7 ATTACKED AND STOLE DATA. Retrieved August 24, 2018.
- Hromcová, Z. (2018, June 07). InvisiMole: Surprisingly equipped spyware, undercover since 2013. Retrieved July 10, 2018.
- Sharma, R. (2018, August 15). Revamped jRAT Uses New Anti-Parsing Techniques. Retrieved September 21, 2018.
- Kamluk, V. & Gostev, A. (2016, February). Adwind - A Cross-Platform RAT. Retrieved April 23, 2019.
- Levene, B, et al. (2017, May 03). Kazuar: Multiplatform Espionage Backdoor with API Access. Retrieved July 17, 2018.
- The DigiTrust Group. (2017, January 01). NanoCore Is Not Your Average RAT. Retrieved November 9, 2018.
- Kasza, A., Halfpop, T. (2016, February 09). NanoCoreRAT Behind an Increase in Tax-Themed Phishing E-mails. Retrieved November 9, 2018.
- Fidelis Cybersecurity. (2013, June 28). Fidelis Threat Advisory #1009: "njRAT" Uncovered. Retrieved June 4, 2019.
- Scott-Railton, J., et al. (2016, August 2). Group5: Syria and the Iranian Connection. Retrieved September 26, 2016.
- Nicolas Verdier. (n.d.). Retrieved January 29, 2018.
- MaxXor. (n.d.). QuasarRAT. Retrieved July 10, 2018.
- Meltzer, M, et al. (2018, June 07). Patchwork APT Group Targets US Think Tanks. Retrieved July 16, 2018.
- Bacurio, F., Salvio, J. (2017, February 14). REMCOS: A New RAT In The Wild. Retrieved November 6, 2018.
- Livelli, K, et al. (2018, November 12). Operation Shaheen. Retrieved May 1, 2019.
- Gannon, M. (2019, February 11). With Upgrades in Delivery and Support Infrastructure, Revenge RAT Malware is a Bigger Threat. Retrieved May 1, 2019.
- GReAT. (2017, November 1). Silence – a new Trojan attacking financial organizations. Retrieved May 24, 2019.
- Grunzweig, J. and Miller-Osborn, J.. (2016, February 4). T9000: Advanced Modular Backdoor Uses Complex Anti-Analysis Techniques. Retrieved April 15, 2016.