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Moonstone Sleet is a North Korean-linked threat actor conducting both cyberespionage and financially motivated operations. It is also tracked as DEV-0530, H0lyGh0st, ML Sleet, and Storm-1789. The group has been associated with development of H0lyGh0st ransomware and deployment of its custom FakePenny malware. In 2025, Moonstone Sleet was reported to have used the Qilin ransomware-as-a-service platform. Its observed delivery tradecraft includes staging malicious capabilities for follow-on download, relying on victim interaction with trojanized software installers for execution, and using layered obfuscation and encoding to hinder detection and analysis. Moonstone Sleet is assessed as part of the broader DPRK cyber ecosystem, in which intelligence collection and illicit revenue generation frequently overlap.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Attributed origin per open-source reporting.
46 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
13 malware families attributed to this actor across reporting.
8 additional families tracked in Mallory.
4 CVEs this actor has used in observed campaigns. 4 of them exploited in the wild.
This detection identifies instances where Windows Explorer.exe spawns PowerShell or cmd.exe processes, particularly focusing on executions initiated by LNK files. This behavior is associated with the ZDI-CAN-25373 Windows shortcut zero-day vulnerability, where specially crafted LNK files are used to trigger malicious code execution through cmd.exe or powershell.exe. This technique has been actively exploited by multiple APT groups in targeted attacks through both HTTP and SMB delivery methods.
To gain initial access, new variants of H0lyGh0st ransomware search for vulnerabilities in the public-facing web applications and content management systems of their target. DotCMS RCE (CVE-2022-26352) vulnerability is one of the vulnerabilities exploited by the ransomware group.
This detection focuses on identifying vulnerable versions 18.12.407 and 18.12.416 of the 3CX desktop app... these specific versions have known vulnerabilities... CVE CVE-2023-29059
Google released an update and thanked us for discovering this attack... CVE-2024-4947... The exploit contains code for two vulnerabilities: the first is used to gain the ability to read and write Chrome process memory from the JavaScript... CVE-2024-4947 ... is the vulnerability in this new compiler.
51 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A North Korean cluster combining cyberespionage and financially motivated operations, including use of Qilin ransomware-as-a-service.
A DPRK-nexus dual-mandate cluster that conducts espionage and revenue-generating operations, including deployment of custom malware and ransomware-as-a-service.
Named as a strategic partner of Qilin's extortion operation; no further operational details are provided.
Listed in the detection's Annotations section.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.