Registry Run Keys / Startup Folder
Adding an entry to the "run keys" in the Registry or startup folder will cause the program referenced to be executed when a user logs in.  These programs will be executed under the context of the user and will have the account's associated permissions level.
The following run keys are created by default on Windows systems:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnceEx is also available but is not created by default on Windows Vista and newer. Registry run key entries can reference programs directly or list them as a dependency.  For example, it is possible to load a DLL at logon using a "Depend" key with RunOnceEx:
reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx\0001\Depend /v 1 /d "C:\temp\evil[.]dll" 
The following Registry keys can be used to set startup folder items for persistence:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
The following Registry keys can control automatic startup of services during boot:
Using policy settings to specify startup programs creates corresponding values in either of two Registry keys:
The Winlogon key controls actions that occur when a user logs on to a computer running Windows 7. Most of these actions are under the control of the operating system, but you can also add custom actions here. The
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit and
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell subkeys can automatically launch programs.
Programs listed in the load value of the registry key
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows run when any user logs on.
By default, the multistring BootExecute value of the registry key
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager is set to autocheck autochk *. This value causes Windows, at startup, to check the file-system integrity of the hard disks if the system has been shut down abnormally. Adversaries can add other programs or processes to this registry value which will automatically launch at boot.
Adversaries can use these configuration locations to execute malware, such as remote access tools, to maintain persistence through system reboots. Adversaries may also use Masquerading to make the Registry entries look as if they are associated with legitimate programs.
BBSRAT has been loaded through DLL side-loading of a legitimate Citrix executable that is set to persist through the Registry Run key location
CORESHELL has established persistence by creating autostart extensibility point (ASEP) Registry entries in the Run key and other Registry keys, as well as by creating shortcuts in the Internet Explorer Quick Start folder.
One persistence mechanism used by CozyCar is to set itself to be executed at system startup by adding a Registry value under one of the following Registry keys:
CrossRAT uses run keys for persistence on Windows
If establishing persistence by installation as a new service fails, one variant of Elise establishes persistence for the created .exe file by setting the following Registry key:
HTTPBrowser has established persistence by setting the
LoJax has modified the Registry key
S-Type may create a .lnk file to itself that is saved in the Start menu folder. It may also create the Registry key
Most Sakula samples maintain persistence by setting the Registry Run key
To establish persistence, SslMM identifies the Start Menu Startup directory and drops a link to its own executable disguised as an "Office Start," "Yahoo Talk," "MSN Gaming Z0ne," or "MSN Talk" shortcut.
This type of attack technique cannot be easily mitigated with preventive controls since it is based on the abuse of system features.
Monitor Registry for changes to run keys that do not correlate with known software, patch cycles, etc. Monitor the start folder for additions or changes. Tools such as Sysinternals Autoruns may also be used to detect system changes that could be attempts at persistence, including listing the run keys' Registry locations and startup folders.  Suspicious program execution as startup programs may show up as outlier processes that have not been seen before when compared against historical data.
Changes to these locations typically happen under normal conditions when legitimate software is installed. To increase confidence of malicious activity, data and events should not be viewed in isolation, but as part of a chain of behavior that could lead to other activities, such as network connections made for Command and Control, learning details about the environment through Discovery, and Lateral Movement.
- Microsoft. (n.d.). Run and RunOnce Registry Keys. Retrieved November 12, 2014.
- Microsoft. (2018, August 20). Description of the RunOnceEx Registry Key. Retrieved June 29, 2018.
- Moe, O. (2018, March 21). Persistence using RunOnceEx - Hidden from Autoruns.exe. Retrieved June 29, 2018.
- PowerShellMafia. (2012, May 26). PowerSploit - A PowerShell Post-Exploitation Framework. Retrieved February 6, 2018.
- PowerSploit. (n.d.). PowerSploit. Retrieved February 6, 2018.
- Nicolas Verdier. (n.d.). Retrieved January 29, 2018.
- Bacurio, F., Salvio, J. (2017, February 14). REMCOS: A New RAT In The Wild. Retrieved November 6, 2018.
- Schroeder, W., Warner, J., Nelson, M. (n.d.). Github PowerShellEmpire. Retrieved April 28, 2016.
- Ladley, F. (2012, May 15). Backdoor.Briba. Retrieved February 21, 2018.
- Falcone, R., et al.. (2015, June 16). Operation Lotus Blossom. Retrieved February 15, 2016.
- Accenture Security. (2018, January 27). DRAGONFISH DELIVERS NEW FORM OF ELISE MALWARE TARGETING ASEAN DEFENCE MINISTERS’ MEETING AND ASSOCIATES. Retrieved November 14, 2018.
- ClearSky Cyber Security and Trend Micro. (2017, July). Operation Wilted Tulip: Exposing a cyber espionage apparatus. Retrieved August 21, 2017.
- Minerva Labs LTD and ClearSky Cyber Security. (2015, November 23). CopyKittens Attack Group. Retrieved September 11, 2017.
- Grunzweig, J., et al. (2016, May 24). New Wekby Attacks Use DNS Requests As Command and Control Mechanism. Retrieved August 17, 2016.
- Grunzweig, J. (2018, January 31). Comnie Continues to Target Organizations in East Asia. Retrieved June 7, 2018.
- F-Secure Labs. (2014). BlackEnergy & Quedagh: The convergence of crimeware and APT attacks. Retrieved March 24, 2016.
- ClearSky Cyber Security. (2017, December). Charming Kitten. Retrieved December 27, 2017.
- Symantec Security Response. (2014, July 7). Dragonfly: Cyberespionage Attacks Against Energy Suppliers. Retrieved April 8, 2016.
- ESET. (2017, August). Gazing at Gazer: Turla’s new second stage backdoor. Retrieved September 14, 2017.
- Kaspersky Lab's Global Research & Analysis Team. (2017, August 30). Introducing WhiteBear. Retrieved September 21, 2017.
- Hayashi, K. (2005, August 18). Backdoor.Darkmoon. Retrieved February 23, 2018.
- ESET. (2016, October). En Route with Sednit - Part 1: Approaching the Target. Retrieved November 8, 2016.
- ESET, et al. (2018, January). Diplomats in Eastern Europe bitten by a Turla mosquito. Retrieved July 3, 2018.
- Stama, D.. (2015, February 6). Backdoor.Mivast. Retrieved February 15, 2016.
- Sherstobitoff, R., Malhotra, A. (2018, October 18). ‘Operation Oceansalt’ Attacks South Korea, U.S., and Canada With Source Code From Chinese Hacker Group. Retrieved November 30, 2018.
- Grunzweig, J.. (2017, April 20). Cardinal RAT Active for Over Two Years. Retrieved December 8, 2018.
- Grunzweig, J. (2018, October 01). NOKKI Almost Ties the Knot with DOGCALL: Reaper Group Uses New Malware to Deploy RAT. Retrieved November 5, 2018.
- Anthony, N., Pascual, C.. (2018, November 1). Trickbot Shows Off New Trick: Password Grabber Module. Retrieved November 16, 2018.
- Elovitz, S. & Ahl, I. (2016, August 18). Know Your Enemy: New Financially-Motivated & Spear-Phishing Group. Retrieved February 26, 2018.
- Gorelik, M.. (2019, June 10). SECURITY ALERT: FIN8 IS BACK IN BUSINESS, TARGETING THE HOSPITALITY INDUSTRY. Retrieved June 13, 2019.
- ClearSky. (2016, January 7). Operation DustySky. Retrieved January 8, 2016.
- Cylance. (2014, December). Operation Cleaver. Retrieved September 14, 2017.
- Falcone, R., et al. (2018, July 27). New Threat Actor Group DarkHydrus Targets Middle East Government. Retrieved August 2, 2018.
- Gavriel, H. & Erbesfeld, B. (2018, April 11). New ‘Early Bird’ Code Injection Technique Discovered. Retrieved May 24, 2018.
- Anthe, C. et al. (2015, October 19). Microsoft Security Intelligence Report Volume 19. Retrieved December 23, 2015.
- Bennett, J., Vengerik, B. (2017, June 12). Behind the CARBANAK Backdoor. Retrieved June 11, 2018.
- FireEye Labs. (2015, April). APT30 AND THE MECHANICS OF A LONG-RUNNING CYBER ESPIONAGE OPERATION. Retrieved May 1, 2015.
- Falcone, R. and Miller-Osborn, J.. (2016, February 3). Emissary Trojan Changelog: Did Operation Lotus Blossom Cause It to Evolve?. Retrieved February 15, 2016.
- Dell SecureWorks Counter Threat Unit Threat Intelligence. (2015, July 30). Sakula Malware Family. Retrieved January 26, 2016.
- Sherstobitoff, R., Saavedra-Morales, J. (2018, February 02). Gold Dragon Widens Olympics Malware Attacks, Gains Permanent Presence on Victims’ Systems. Retrieved June 6, 2018.
- Grunzweig, J. and Miller-Osborn, J. (2017, November 10). New Malware with Ties to SunOrcal Discovered. Retrieved November 16, 2017.
- PwC and BAE Systems. (2017, April). Operation Cloud Hopper: Technical Annex. Retrieved April 13, 2017.
- F-Secure Labs. (2015, April 22). CozyDuke: Malware Analysis. Retrieved December 10, 2015.
- Adair, S.. (2016, November 9). PowerDuke: Widespread Post-Election Spear Phishing Campaigns Targeting Think Tanks and NGOs. Retrieved January 11, 2017.
- Faou, M. and Boutin, J.. (2017, February). Read The Manual: A Guide to the RTM Banking Trojan. Retrieved March 9, 2017.
- Settle, A., et al. (2016, August 8). MONSOON - Analysis Of An APT Campaign. Retrieved September 22, 2016.
- Desai, D.. (2015, August 14). Chinese cyber espionage APT group leveraging recently leaked Hacking Team exploits to target a Financial Services Firm. Retrieved January 26, 2016.
- Shelmire, A.. (2015, July 6). Evasive Maneuvers. Retrieved January 22, 2016.
- ASERT Team. (2018, April 04). Innaput Actors Utilize Remote Access Trojan Since 2016, Presumably Targeting Victim Files. Retrieved July 9, 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.
- Falcone, R. and Lee, B.. (2016, May 26). The OilRig Campaign: Attacks on Saudi Arabian Organizations Deliver Helminth Backdoor. Retrieved May 3, 2017.
- Mercer, W., Rascagneres, P. (2018, May 31). NavRAT Uses US-North Korea Summit As Decoy For Attacks In South Korea. Retrieved June 11, 2018.
- Cherepanov, A.. (2016, May 17). Operation Groundbait: Analysis of a surveillance toolkit. Retrieved May 18, 2016.
- Kaspersky Lab's Global Research and Analysis Team. (2015, December 4). Sofacy APT hits high profile targets with updated toolset. Retrieved December 10, 2015.
- ESET. (2016, October). En Route with Sednit - Part 2: Observing the Comings and Goings. Retrieved November 21, 2016.
- Bitdefender. (2015, December). APT28 Under the Scope. Retrieved February 23, 2017.
- Kasza, A. and Reichel, D.. (2017, February 27). The Gamaredon Group Toolset Evolution. Retrieved March 1, 2017.
- Levene, B, et al. (2017, May 03). Kazuar: Multiplatform Espionage Backdoor with API Access. Retrieved July 17, 2018.
- Hasherezade. (2016, September 12). Smoke Loader – downloader with a smokescreen still alive. Retrieved March 20, 2018.
- Gross, J. (2016, February 23). Operation Dust Storm. Retrieved September 19, 2017.
- Calvet, J. (2014, November 11). Sednit Espionage Group Attacking Air-Gapped Networks. Retrieved January 4, 2017.
- Cherepanov, A. (2018, October). GREYENERGY A successor to BlackEnergy. Retrieved November 15, 2018.
- Brumaghin, E. and Grady, C.. (2017, March 2). Covert Channels and Poor Decisions: The Tale of DNSMessenger. Retrieved March 8, 2017.
- F-Secure Labs. (2016, July). NANHAISHU RATing the South China Sea. Retrieved July 6, 2018.
- Rascagneres, P. (2017, May 03). KONNI: A Malware Under The Radar For Years. Retrieved November 5, 2018.
- Bar, T., Conant, S. (2017, October 20). BadPatch. Retrieved November 13, 2018.
- Patel, K. (2018, March 02). The NanoCore RAT Has Resurfaced From the Sewers. Retrieved November 9, 2018.
- Brumaghin, E., et al. (2017, November 02). Poisoning the Well: Banking Trojan Targets Google Search Results. Retrieved November 5, 2018.
- Ebach, L. (2017, June 22). Analysis Results of Zeus.Variant.Panda. Retrieved November 5, 2018.
- Ash, B., et al. (2018, June 26). RANCOR: Targeted Attacks in South East Asia Using PLAINTEE and DDKONG Malware Families. Retrieved July 2, 2018.
- Fidelis Cybersecurity. (2015, December 16). Fidelis Threat Advisory #1020: Dissecting the Malware Involved in the INOCNATION Campaign. Retrieved March 24, 2016.
- Ray, V., Hayashi, K. (2016, February 29). New Malware ‘Rover’ Targets Indian Ambassador to Afghanistan. Retrieved February 29, 2016.
- Blasco, J. (2013, March 21). New Sykipot developments [Blog]. Retrieved November 12, 2014.
- Accenture Security. (2018, April 23). Hogfish Redleaves Campaign. Retrieved July 2, 2018.
- Zhang, X. (2018, April 05). Analysis of New Agent Tesla Spyware Variant. Retrieved November 5, 2018.
- Microsoft. (2017, September 15). Backdoor:Win32/Truvasys.A!dha. Retrieved November 30, 2017.
- McAfee. (2015, March 2). Netwire RAT Behind Recent Targeted Attacks. Retrieved February 15, 2018.
- Grunzweig, J., Lee, B. (2018, September 27). New KONNI Malware attacking Eurasia and Southeast Asia. Retrieved November 5, 2018.
- Baumgartner, K., Golovkin, M.. (2015, May). The MsnMM Campaigns: The Earliest Naikon APT Campaigns. Retrieved April 10, 2019.
- Pantazopoulos, N. (2018, April 17). Decoding network data from a Gh0st RAT variant. Retrieved November 2, 2018.
- Vasilenko, R. (2013, December 17). An Analysis of PlugX Malware. Retrieved November 24, 2015.
- Computer Incident Response Center Luxembourg. (2013, March 29). Analysis of a PlugX variant. Retrieved November 5, 2018.
- Grunzweig, J.. (2015, July 14). Unit 42 Technical Analysis: Seaduke. Retrieved August 3, 2016.
- Yadav, A., et al. (2017, August 31). Cobian RAT – A backdoored RAT. Retrieved November 13, 2018.
- FireEye iSIGHT Intelligence. (2017, April 6). APT10 (MenuPass Group): New Tools, Global Campaign Latest Manifestation of Longstanding Threat. Retrieved June 29, 2017.
- FinFisher. (n.d.). Retrieved December 20, 2017.
- Allievi, A.,Flori, E. (2018, March 01). FinFisher exposed: A researcher’s tale of defeating traps, tricks, and complex virtual machines. Retrieved July 9, 2018.
- Yadav, A., et al. (2016, January 29). Malicious Office files dropping Kasidet and Dridex. Retrieved March 24, 2016.
- Manuel, J. and Plantado, R.. (2015, August 9). Win32/Kasidet. Retrieved March 24, 2016.
- Hayashi, K., Ray, V. (2018, July 31). Bisonal Malware Used in Attacks Against Russia and South Korea. Retrieved August 7, 2018.
- Zhou, R. (2012, May 15). Backdoor.Vasport. Retrieved February 22, 2018.
- ESET. (2018, November 20). Sednit: What’s going on with Zebrocy?. Retrieved February 12, 2019.
- ESET Research. (2019, May 22). A journey to Zebrocy land. Retrieved June 20, 2019.
- Accenture Security. (2018, November 29). SNAKEMACKEREL. Retrieved April 15, 2019.
- Xiao, C. (2018, September 17). Xbash Combines Botnet, Ransomware, Coinmining in Worm that Targets Linux and Windows. Retrieved November 14, 2018.
- Symantec. (2018, July 18). The Evolution of Emotet: From Banking Trojan to Threat Distributor. Retrieved March 25, 2019.
- US-CERT. (2018, July 20). Alert (TA18-201A) Emotet Malware. Retrieved March 25, 2019.
- Özarslan, S. (2018, December 21). The Christmas Card you never wanted - A new wave of Emotet is back to wreak havoc. Retrieved March 25, 2019.
- Ackerman, G., et al. (2018, December 21). OVERRULED: Containing a Potentially Destructive Adversary. Retrieved January 17, 2019.
- Doaty, J., Garrett, P.. (2018, September 10). We’re Seeing a Resurgence of the Demonic Astaroth WMIC Trojan. Retrieved April 17, 2019.
- Legezo, D. (2019, January 30). Chafer used Remexi malware to spy on Iran-based foreign diplomatic entities. Retrieved April 17, 2019.
- Livelli, K, et al. (2018, November 12). Operation Shaheen. Retrieved May 1, 2019.
- Vilkomir-Preisman, S. (2019, April 2). New ServHelper Variant Employs Excel 4.0 Macro to Drop Signed Payload. Retrieved May 28, 2019.
- Fidelis Cybersecurity. (2013, June 28). Fidelis Threat Advisory #1009: "njRAT" Uncovered. Retrieved June 4, 2019.
- Pascual, C. (2018, November 27). AutoIt-Compiled Worm Affecting Removable Media Delivers Fileless Version of BLADABINDI/njRAT Backdoor. Retrieved June 4, 2019.
- Trend Micro. (2014, December 11). PE_URSNIF.A2. Retrieved June 5, 2019.
- Sioting, S. (2013, June 15). BKDR_URSNIF.SM. Retrieved June 5, 2019.
- Sancho, D., et al. (2012, May 22). IXESHE An APT Campaign. Retrieved June 7, 2019.
- Lee, S.. (2019, May 14). JCry Ransomware. Retrieved June 18, 2019.
- Marschalek, M.. (2014, December 16). EvilBunny: Malware Instrumented By Lua. Retrieved June 28, 2019.
- ESET. (2018, September). LOJAX First UEFI rootkit found in the wild, courtesy of the Sednit group. Retrieved July 2, 2019.
- Unit 42. (2019, February 22). New BabyShark Malware Targets U.S. National Security Think Tanks. Retrieved October 7, 2019.
- Namestnikov, Y. and Aime, F. (2019, May 8). FIN7.5: the infamous cybercrime rig “FIN7” continues its activities. Retrieved October 11, 2019.
- Dunwoody, M. and Carr, N.. (2016, September 27). No Easy Breach DerbyCon 2016. Retrieved October 4, 2016.
- Singh, S. et al.. (2018, March 13). Iranian Threat Group Updates Tactics, Techniques and Procedures in Spear Phishing Campaign. Retrieved April 11, 2018.
- Kaspersky Lab's Global Research & Analysis Team. (2018, October 10). MuddyWater expands operations. Retrieved November 2, 2018.
- Adamitis, D. et al. (2019, May 20). Recent MuddyWater-associated BlackWater campaign shows signs of new anti-detection techniques. Retrieved June 5, 2019.
- FireEye. (2018, February 20). APT37 (Reaper): The Overlooked North Korean Actor. Retrieved March 1, 2018.
- Mercer, W., Rascagneres, P. (2018, January 16). Korea In The Crosshairs. Retrieved May 21, 2018.
- Novetta Threat Research Group. (2016, February 24). Operation Blockbuster: Unraveling the Long Thread of the Sony Attack. Retrieved February 25, 2016.
- Novetta Threat Research Group. (2016, February 24). Operation Blockbuster: Remote Administration Tools & Content Staging Malware Report. Retrieved March 16, 2016.
- Sherstobitoff, R. (2018, February 12). Lazarus Resurfaces, Targets Global Banks and Bitcoin Users. Retrieved February 19, 2018.
- ESET Research. (2018, May 22). Turla Mosquito: A shift towards more generic tools. Retrieved July 3, 2018.
- Axel F, Pierre T. (2017, October 16). Leviathan: Espionage actor spearphishes maritime and defense targets. Retrieved February 15, 2018.
- FireEye. (2018, March 16). Suspected Chinese Cyber Espionage Group (TEMP.Periscope) Targeting U.S. Engineering and Maritime Industries. Retrieved April 11, 2018.
- Grunzweig, J., Lee, B. (2016, January 22). New Attacks Linked to C0d0so0 Group. Retrieved August 2, 2018.
- Cymmetria. (2016). Unveiling Patchwork - The Copy-Paste APT. Retrieved August 3, 2016.
- Lunghi, D., et al. (2017, December). Untangling the Patchwork Cyberespionage Group. Retrieved July 10, 2018.
- FireEye iSIGHT Intelligence. (2017, June 16). FIN10: Anatomy of a Cyber Extortion Operation. Retrieved June 25, 2017.
- FireEye Threat Intelligence. (2016, April). Follow the Money: Dissecting the Operations of the Cyber Crime Group FIN6. Retrieved June 1, 2016.
- Blaich, A., et al. (2018, January 18). Dark Caracal: Cyber-espionage at a Global Scale. Retrieved April 11, 2018.
- Counter Threat Unit Research Team. (2017, October 12). BRONZE BUTLER Targets Japanese Enterprises. Retrieved January 4, 2018.
- Matveeva, V. (2017, August 15). Secrets of Cobalt. Retrieved October 10, 2018.
- Smallridge, R. (2018, March 10). APT15 is alive and strong: An analysis of RoyalCli and RoyalDNS. Retrieved April 4, 2018.
- Sherstobitoff, R. (2018, March 02). McAfee Uncovers Operation Honeybee, a Malicious Document Campaign Targeting Humanitarian Aid Groups. Retrieved May 16, 2018.
- Lee, B. and Falcone, R. (2017, February 15). Magic Hound Campaign Attacks Saudi Targets. Retrieved December 27, 2017.
- Crowdstrike Global Intelligence Team. (2014, June 9). CrowdStrike Intelligence Report: Putter Panda. Retrieved January 22, 2016.
- Shelmire, A. (2015, July 06). Evasive Maneuvers by the Wekby group with custom ROP-packing and DNS covert channels. Retrieved November 15, 2018.
- Grunzweig, J., et al. (2016, May 24). New Wekby Attacks Use DNS Requests As Command and Control Mechanism. Retrieved November 15, 2018.
- Pantazopoulos, N., Henry T. (2018, May 18). Emissary Panda – A potential new malicious tool. Retrieved June 25, 2018.
- US-CERT. (2018, March 16). Alert (TA18-074A): Russian Government Cyber Activity Targeting Energy and Other Critical Infrastructure Sectors. Retrieved June 6, 2018.
- Dahan, A. (2017, May 24). OPERATION COBALT KITTY: A LARGE-SCALE APT IN ASIA CARRIED OUT BY THE OCEANLOTUS GROUP. Retrieved November 5, 2018.
- Dahan, A. (2017). Operation Cobalt Kitty. Retrieved December 27, 2018.
- Dumont, R. (2019, March 20). Fake or Fake: Keeping up with OceanLotus decoys. Retrieved April 1, 2019.
- Moran, N., et al. (2014, November 21). Operation Double Tap. Retrieved January 14, 2016.
- Falcone, R., et al. (2018, August 02). The Gorgon Group: Slithering Between Nation State and Cybercrime. Retrieved August 7, 2018.
- Kaspersky Lab's Global Research and Analysis Team. (2014, November). The Darkhotel APT A Story of Unusual Hospitality. Retrieved November 12, 2014.
- Carr, N., et al. (2017, April 24). FIN7 Evolution and the Phishing LNK. Retrieved April 24, 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.
- Hawley et al. (2019, January 29). APT39: An Iranian Cyber Espionage Group Focused on Personal Information. Retrieved February 19, 2019.
- Security Response attack Investigation Team. (2019, March 27). Elfin: Relentless Espionage Group Targets Multiple Organizations in Saudi Arabia and U.S.. Retrieved April 10, 2019.
- Tarakanov , D.. (2013, September 11). The “Kimsuky” Operation: A North Korean APT?. Retrieved August 13, 2019.
- The Cylance Threat Research Team. (2017, March 22). El Machete's Malware Attacks Cut Through LATAM. Retrieved September 13, 2019.
- Fraser, N., et al. (2019, August 7). Double DragonAPT41, a dual espionage and cyber crime operation APT41. Retrieved September 23, 2019.
- Russinovich, M. (2016, January 4). Autoruns for Windows v13.51. Retrieved June 6, 2016.