Threat Actor

Kimsuky

Kimsuky is a Democratic People's Republic of Korea (DPRK)-based cyber espionage group that has been active since at least 2012. The group initially targeted South Korean government agencies, think tanks, and subject-matter experts in various fields. Its operations expanded to include the United Nations and organizations in the government, education, business services, and manufacturing sectors across the United States, Japan, Russia, and Europe. Kimsuky has focused collection on foreign policy and national security issues tied to the Korean Peninsula, nuclear policy, and sanctions. Kimsuky operations have overlapped with those of other North Korean state-sponsored cyber espionage actors as a result of ad hoc collaborations or other limited resource sharing. Kimsuky was assessed to be responsible for the 2014 Korea Hydro & Nuclear Power Co. compromise; other notable campaigns include Operation STOLEN PENCIL (2018), Operation Kabar Cobra (2019), and Operation Smoke Screen (2019). In 2023, Kimsuky was observed using commercial large language models (LLMs) to assist with vulnerability research, scripting, social engineering and reconnaissance. DPRK threat actor cluster boundaries overlap in open source reporting, with some security researchers consolidating all attributed North Korean state-sponsored cyber activity under Lazarus Group, rather than tracking operationally distinct subgroups.

131
Techniques
19
Software
0
indicators on this record

Properties

Last source
MITRE ATT&CK
STIX ID
intrusion-set--0ec2f388-bf0f-4b5c-97b1-fc736d26c25f
In Signal since
initial import (Sep 2026)
Retrieved at
2026-11-01T16:36:58+00:00
Origin source
attack_description
Type
intrusion-set
Origin country
KP

MITRE ATT&CK Techniques (showing 30 of 131)

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Acquire Infrastructure (T1583)

Adversaries may buy, lease, rent, or obtain infrastructure that can be used during targeting. A wide variety of infrastructure exists for hosting and

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Additional Local or Domain Groups (T1098.007)

An adversary may add additional local or domain groups to an adversary-controlled account to maintain persistent access to a system or domain. On Win

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Adversary-in-the-Middle (T1557)

Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support foll

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Archive via Custom Method (T1560.003)

An adversary may compress or encrypt data that is collected prior to exfiltration using a custom method. Adversaries may choose to use custom archival

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Archive via Utility (T1560.001)

Adversaries may use utilities to compress and/or encrypt collected data prior to exfiltration. Many utilities include functionalities to compress, enc

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Automated Exfiltration (T1020)

Adversaries may exfiltrate data, such as sensitive documents, through the use of automated processing after being gathered during Collection.(Citation

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Bidirectional Communication (T1102.002)

Adversaries may use an existing, legitimate external Web service as a means for sending commands to and receiving output from a compromised system ove

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Binary Padding (T1027.001)

Adversaries may use binary padding to add junk data and change the on-disk representation of malware. This can be done without affecting the functiona

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Browser Extensions (T1176.001)

Adversaries may abuse internet browser extensions to establish persistent access to victim systems. Browser extensions or plugins are small programs t

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Browser Information Discovery (T1217)

Adversaries may enumerate information about browsers to learn more about compromised environments. Data saved by browsers (such as bookmarks, accounts

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Browser Session Hijacking (T1185)

Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, an

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Change Default File Association (T1546.001)

Adversaries may establish persistence by executing malicious content triggered by a file type association. When a file is opened, the default program

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Clipboard Data (T1115)

Adversaries may collect data stored in the clipboard from users copying information within or between applications. For example, on Windows adversar

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Code Signing (T1553.002)

Adversaries may create, acquire, or steal code signing materials to sign their malware or tools. Code signing provides a level of authenticity on a bi

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Code Signing Certificates (T1588.003)

Adversaries may buy and/or steal code signing certificates that can be used during targeting. Code signing is the process of digitally signing executa

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Command Obfuscation (T1027.010)

Adversaries may obfuscate content during command execution to impede detection. Command-line obfuscation is a method of making strings and patterns wi

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Component Object Model (T1559.001)

Adversaries may use the Windows Component Object Model (COM) for local code execution. COM is an inter-process communication (IPC) component of the na

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Compression (T1027.015)

Adversaries may use compression to obfuscate their payloads or files. Compressed file formats such as ZIP, gzip, 7z, and RAR can compress and archive

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Credentials In Files (T1552.001)

Adversaries may search local file systems and remote file shares for files containing insecurely stored credentials. These can be files created by use

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Credentials from Web Browsers (T1555.003)

Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web bro

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Data from Local System (T1005)

Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to

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Dead Drop Resolver (T1102.001)

Adversaries may use an existing, legitimate external Web service to host information that points to additional command and control (C2) infrastructure

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Delay Execution (T1678)

Adversaries may employ various time-based methods to evade detection and analysis. These techniques often exploit system clocks, delays, or timing mec

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Deobfuscate/Decode Files or Information (T1140)

Adversaries may use Obfuscated Files or Information to hide artifacts of an intrusion from analysis. They

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Develop Capabilities (T1587)

Adversaries may build capabilities that can be used during targeting. Rather than purchasing, freely downloading, or stealing capabilities, adversarie

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Disable or Modify System Firewall (T1686)

Adversaries may disable or modify host-based or network firewalls to impair defensive mechanisms and enable further action. Once an adversary has gath

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Disable or Modify Tools (T1685)

Adversaries may disable, degrade, or tamper with security tools or applications (e.g., endpoint detection and response (EDR) tools, intrusion detectio

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Domains (T1584.001)

Adversaries may hijack domains and/or subdomains that can be used during targeting. Domain registration hijacking is the act of changing the registrat

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Domains (T1583.001)

Adversaries may acquire domains that can be used during targeting. Domain names are the human readable names used to represent one or more IP addresse

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Double File Extension (T1036.007)

Adversaries may abuse a double extension in the filename as a means of masquerading the true file type. A file name may include a secondary file type

Software & Tools (19)

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Amadey [malware]

Amadey is a Trojan bot that has been used since at least October 2018.(Cit

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AppleSeed [malware]

AppleSeed is a backdoor that has been used by Kimsuky to target So

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BabyShark [malware]

BabyShark is a Microsoft Visual Basic (VB) script-based malware family that is believed to be associated wi

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Brave Prince [malware]

Brave Prince is a Korean-language implant that was first observed in the wild in December 2017. It contains

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CSPY Downloader [tool]

CSPY Downloader is a tool designed to evade analysis and download additional payloads used by [Kimsuky](htt

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GoBear [malware]

GoBear is a Go-based backdoor that abuses legitimate, stolen certificates for defense evasion purposes. [Go

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Gold Dragon [malware]

Gold Dragon is a Korean-language, data gathering implant that was first observed in the wild in South Korea

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Gomir [malware]

Gomir is a Linux backdoor variant of the Go-based malware GoBear, uniquely assoicated with [Kimsuky](https:

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HTTPTroy [malware]

HTTPTroy is a highly obfuscated backdoor that facilitates collection, command and control, defense evasion

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KGH_SPY [malware]

KGH_SPY is a modular suite of tools used by Kimsuky for reconnaiss

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MimiKatz [malware]

Mimikatz is a credential dumper capable of obtaining plaintext Windows account logins and passwords, along

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NOKKI [malware]

NOKKI is a modular remote access tool. The earliest observed attack using [NOKKI](https://attack.mitre.org/

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PsExec [tool]

PsExec is a free Microsoft tool that can be used to execute a program on another computer. It is used by IT

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QuasarRAT [malware]

QuasarRAT is an open-source, remote access tool that has been publicly available on GitHub since at least 2

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TRANSLATEXT [malware]

TRANSLATEXT is malware that is believed to be used by Kimsuky.(Cit

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Troll Stealer [malware]

Troll Stealer is an information stealer written in Go associated with [Kimsuky](https://attack.mitre.org/gr

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certutil [tool]

certutil is a command-line utility that can be used to obtain certificate authority information and configu

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gh0st RAT [malware]

gh0st RAT is a remote access tool (RAT). The source code is public and it has been used by multiple groups.

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schtasks [tool]

schtasks is used to schedule execution of programs or scripts on a Windows system to run at a specific date

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