APT37 is a suspected North Korean cyber espionage group that has been active since at least 2012. The group has targeted victims primarily in South Korea, but also in Japan, Vietnam, Russia, Nepal, China, India, Romania, Kuwait, and other parts of the Middle East. APT37 has also been linked to following campaigns between 2016-2018: Operation Daybreak, Operation Erebus, Golden Time, Evil New Year, Are you Happy?, FreeMilk, Northern Korean Human Rights, and Evil New Year 2018.   
North Korean group definitions are known to have significant overlap, and the name Lazarus Group is known to encompass a broad range of activity. Some organizations use the name Lazarus Group to refer to any activity attributed to North Korea. Some organizations track North Korean clusters or groups such as Bluenoroff,, APT37, and APT38 separately, while other organizations may track some activity associated with those group names by the name Lazarus Group.
Associated Group Descriptions
|Enterprise||T1123||Audio Capture||APT37 has used an audio capturing utility known as SOUNDWAVE that captures microphone input.|
|Enterprise||T1116||Code Signing||APT37 has signed its malware with an invalid digital certificates listed as “Tencent Technology (Shenzhen) Company Limited.”|
|Enterprise||T1059||Command-Line Interface||APT37 has used the command-line interface.|
|Enterprise||T1043||Commonly Used Port||APT37 has used port 8080 for C2.|
|Enterprise||T1003||Credential Dumping||APT37 has used a credential stealer known as ZUMKONG that can harvest usernames and passwords stored in browsers.|
|Enterprise||T1094||Custom Command and Control Protocol||APT37 credential stealer ZUMKONG emails credentials from the victim using HTTP POST requests.|
|Enterprise||T1005||Data from Local System||APT37 has collected data from victims' local systems.|
|Enterprise||T1487||Disk Structure Wipe||APT37 has access to destructive malware that is capable of overwriting a machine's Master Boot Record (MBR).|
|Enterprise||T1173||Dynamic Data Exchange||APT37 has used Windows DDE for execution of commands and a malicious VBS.|
|Enterprise||T1106||Execution through API||APT37 leverages the Windows API calls: VirtualAlloc(), WriteProcessMemory(), and CreateRemoteThread() for process injection.|
|Enterprise||T1203||Exploitation for Client Execution||APT37 has used Flash Player (CVE-2016-4117, CVE-2018-4878) and Word (CVE-2017-0199) exploits for execution.|
|Enterprise||T1027||Obfuscated Files or Information||APT37 sends images to users that are embedded with shellcode and obfuscates strings and payloads.|
|Enterprise||T1057||Process Discovery||APT37's Freenki malware lists running processes using the Microsoft Windows API.|
|Enterprise||T1055||Process Injection||APT37 injects its malware variant, ROKRAT, into the cmd.exe process.|
|Enterprise||T1060||Registry Run Keys / Startup Folder||APT37's has added persistence via the Registry key |
|Enterprise||T1105||Remote File Copy||APT37 has downloaded second stage malware from compromised websites.|
|Enterprise||T1064||Scripting||APT37 executes shellcode and a script to decode Base64 strings.|
|Enterprise||T1193||Spearphishing Attachment||APT37 delivers malware using spearphishing emails with malicious HWP attachments.|
|Enterprise||T1071||Standard Application Layer Protocol||APT37 uses HTTPS to conceal C2 communications.|
|Enterprise||T1082||System Information Discovery||APT37 collects the computer name, the BIOS model, and execution path.|
|Enterprise||T1033||System Owner/User Discovery||APT37 identifies the victim username.|
|Enterprise||T1204||User Execution||APT37 has sent spearphishing attachments attempting to get a user to open them.|
|Enterprise||T1102||Web Service||APT37 leverages social networking sites and cloud platforms (AOL, Twitter, Yandex, Mediafire, pCloud, Dropbox, and Box) for C2.|
- FireEye. (2018, February 20). APT37 (Reaper): The Overlooked North Korean Actor. Retrieved March 1, 2018.
- Raiu, C., and Ivanov, A. (2016, June 17). Operation Daybreak. Retrieved February 15, 2018.
- Mercer, W., Rascagneres, P. (2018, January 16). Korea In The Crosshairs. Retrieved May 21, 2018.
- US-CERT. (2017, June 13). Alert (TA17-164A) HIDDEN COBRA – North Korea’s DDoS Botnet Infrastructure. Retrieved July 13, 2017.
- GReAT. (2017, April 3). Lazarus Under the Hood. Retrieved April 17, 2019.
- Grunzweig, J. (2018, October 01). NOKKI Almost Ties the Knot with DOGCALL: Reaper Group Uses New Malware to Deploy RAT. Retrieved November 5, 2018.
- Mercer, W., Rascagneres, P. (2018, May 31). NavRAT Uses US-North Korea Summit As Decoy For Attacks In South Korea. Retrieved June 11, 2018.