Threat Actor

Moonstone Sleet

Also known as: Moonstone Sleet, Storm-1789

[Moonstone Sleet](https://attack.mitre.org/groups/G1036) is a North Korean-linked threat actor executing both financially motivated attacks and espionage operations. The group previously overlapped significantly with another North Korean-linked entity, [Lazarus Group](https://attack.mitre.org/groups/G0032), but has differentiated its tradecraft since 2023. [Moonstone Sleet](https://attack.mitre.org/groups/G1036) is notable for creating fake companies and personas to interact with victim entities, as well as developing unique malware such as a variant delivered via a fully functioning game.(Citation: Microsoft Moonstone Sleet 2024)

30
Techniques
1
Software

Properties

stix_id
intrusion-set--e6db1e55-b199-4b6b-8633-989345ee45e0
signal_observed_at
2026-09-11T17:55:00+00:00
type
intrusion-set

MITRE ATT&CK Techniques (30)

Browser Information Discovery

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

Compromise Software Supply Chain

Adversaries may manipulate application software prior to receipt by a final consumer for the purpose of data or system compromise. Supply chain compro

Data Encrypted for Impact

Adversaries may encrypt data on target systems or on large numbers of systems in a network to interrupt availability to system and network resources.

Deobfuscate/Decode Files or Information

Adversaries may use [Obfuscated Files or Information](https://attack.mitre.org/techniques/T1027) to hide artifacts of an intrusion from analysis. They

Develop Capabilities

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

Domains

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

Email Accounts

Adversaries may create email accounts that can be used during targeting. Adversaries can use accounts created with email providers to further their op

Email Addresses

Adversaries may gather email addresses that can be used during targeting. Even if internal instances exist, organizations may have public-facing email

Embedded Payloads

Adversaries may embed payloads within other files to conceal malicious content from defenses. Otherwise seemingly benign files (such as scripts and ex

Encrypted/Encoded File

Adversaries may encrypt or encode files to obfuscate strings, bytes, and other specific patterns to impede detection. Encrypting and/or encoding file

Gather Victim Org Information

Adversaries may gather information about the victim's organization that can be used during targeting. Information about an organization may include a

Ingress Tool Transfer

Adversaries may transfer tools or other files from an external system into a compromised environment. Tools or files may be copied from an external ad

LSASS Memory

Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS). After a

Malicious File

An adversary may rely upon a user opening a malicious file in order to gain execution. Users may be subjected to social engineering to get them to ope

Malware

Adversaries may develop malware and malware components that can be used during targeting. Building malicious software can include the development of p

Obfuscated Files or Information

Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents

Phishing for Information

Adversaries may send phishing messages to elicit sensitive information that can be used during targeting. Phishing for information is an attempt to tr

Registry Run Keys / Startup Folder

Adversaries may achieve persistence by adding a program to a startup folder or referencing it with a Registry run key. Adding an entry to the "run key

Scheduled Task

Adversaries may abuse the Windows Task Scheduler to perform task scheduling for initial or recurring execution of malicious code. There are multiple w

Service Execution

Adversaries may abuse the Windows service control manager to execute malicious commands or payloads. The Windows service control manager (<code>servic

Social Media Accounts

Adversaries may create and cultivate social media accounts that can be used during targeting. Adversaries can create social media accounts that can be

Spearphishing Attachment

Adversaries may send spearphishing emails with a malicious attachment in an attempt to gain access to victim systems. Spearphishing attachment is a sp

Spearphishing Link

Adversaries may send spearphishing messages with a malicious link to elicit sensitive information that can be used during targeting. Spearphishing for

Spearphishing via Service

Adversaries may send spearphishing messages via third-party services in an attempt to gain access to victim systems. Spearphishing via service is a sp

System Information Discovery

An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and

System Network Configuration Discovery

Adversaries may look for details about the network configuration and settings, such as IP and/or MAC addresses, of systems they access or through info

System Owner/User Discovery

Adversaries may attempt to identify the primary user, currently logged in user, set of users that commonly uses a system, or whether a user is activel

Upload Malware

Adversaries may upload malware to third-party or adversary controlled infrastructure to make it accessible during targeting. Malicious software can in

Virtual Private Server

Adversaries may rent Virtual Private Servers (VPSs) that can be used during targeting. There exist a variety of cloud service providers that will sell

Web Protocols

Adversaries may communicate using application layer protocols associated with web traffic to avoid detection/network filtering by blending in with exi

Software & Tools (1)

Qilin [malware]

[Qilin](https://attack.mitre.org/software/S1242) is a ransomware family operated as a ransomware-as-a-service (RaaS) that has been active since at lea

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