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Kimsuky is a North Korean state-sponsored cyber espionage group widely associated with the Reconnaissance General Bureau and tracked under numerous aliases including APT43, Emerald Sleet, Velvet Chollima, Thallium, TA406, TA408, TA427, Black Banshee, Springtail, Sparkling Pisces, and Opal Sleet. The group has been active for more than a decade and is known for sustained intelligence collection operations centered on social engineering, credential theft, malware deployment, and long-term access to victim environments. Kimsuky primarily targets South Korean entities, but has also targeted U.S. and other foreign government-related organizations. Reported victim sectors include government and public policy organizations, think tanks, academia, diplomatic missions, military and security institutions, civil society organizations focused on North Korean issues, security researchers, and virtual asset-related organizations. The group has shown particular interest in individuals and institutions connected to Korean Peninsula policy, North Korean human rights, unification issues, and scientific or engineering research. Its operations commonly begin with spearphishing, including malicious document attachments, ZIP archives containing disguised LNK files, and credential-harvesting lures. More recent reporting also ties Kimsuky to QR-code spearphishing against think tanks, academic institutions, and government entities. Kimsuky frequently uses decoy documents and impersonation themes involving government correspondence, research materials, embassy communications, legal or financial documents, and event-related content to induce execution or credential submission. Kimsuky tradecraft repeatedly features obfuscated PowerShell execution, hidden windows, scheduled-task persistence, abuse of legitimate cloud and web services for payload hosting or command and control, and use of Windows-native utilities such as regsvr32. In Operation GitPower, the group used phishing-delivered LNK files to launch concealed PowerShell loaders, display decoy documents, establish persistence via scheduled tasks, and retrieve additional payloads from GitHub-hosted infrastructure, including AsyncRAT. Reporting also describes broader Kimsuky use of browser credential and cookie theft, PowerShell-based keylogging, system information discovery, and persistent access mechanisms. The group has operated malware families and tooling including AppleSeed and other RAT capabilities, and has conducted multi-stage intrusions involving credential theft, internal access expansion, lateral movement, post-exploitation activity, and data exfiltration. In Operation Newton, Kimsuky reportedly targeted scientific and engineering researchers, stole webmail and VPN credentials, accessed internal networks, deployed Windows and Linux tooling, moved laterally, and exfiltrated research data. Separate reporting has linked Kimsuky-aligned tradecraft to Android malware using Firebase Cloud Messaging for command and control, and to AutoIT-based malware targeting North Korean human rights defenders. Recent reporting indicates Kimsuky is integrating publicly available local AI tooling into its espionage workflow to improve lure generation, document analysis, translation, automation, and handling of stolen information. This appears to represent an evolution in operational efficiency rather than a fundamental change in the group’s core intrusion methods. Kimsuky’s dominant motivation is espionage, with operations focused on political, diplomatic, strategic, and security intelligence collection in support of North Korean state interests.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
52 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
54 malware families attributed to this actor across reporting.
49 additional families tracked in Mallory.
17 CVEs this actor has used in observed campaigns. 17 of them exploited in the wild.
APT28 has used a variety of public exploits, including CVE 2020-0688 ... to gain execution on vulnerable Microsoft Exchange... Dragonfly ... exploited ... CVE-2020-0688 for ... MS Exchange... Kimsuky ... including Microsoft Exchange vulnerability CVE-2020-0688. MuddyWater has exploited the Microsoft Exchange memory corruption vulnerability (CVE-2020-0688). During the SolarWinds Compromise, APT29 exploited CVE-2020-0688 against the Microsoft Exchange Control Panel...
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.
DPRK aligned TA406 (Opal Sleet) chained CVE-2026-21510 with CVE-2026-21509 in active campaigns.
CVE-2024-1708 (CVSS:8.4) is a path traversal vulnerability that can allow an attacker to execute code remotely on the ScreenConnect server. Together, CVE-2024-1709 and CVE-2024-1708 can allow a threat actor to perform remote code execution post authentication.
Two critical vulnerabilities, tracked as CVE-2024-1708 and CVE-2024-1709, were recently addressed in ConnectWise ScreenConnect and have been exploited by many threat actors due to its ease of exploitability. CVE-2024-1709 (CVSS:10) can allow for authentication bypass due to insufficient path filtering.
12 more CVEs tied to this actor tracked in Mallory.
2,700 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.
Conducting an espionage campaign known as Operation GitPower using phishing emails with ZIP-delivered LNK files, concealed PowerShell, scheduled-task persistence, GitHub-hosted payload delivery/C2, and local AI tooling to improve lure creation, document review, translation, automation, malware development, and processing of stolen information.
Espionage campaign dubbed Operation GitPower targeting political and academic organizations, diplomatic missions, military and security institutions, security researchers, and the virtual assets sector, using spear-phishing ZIP/LNK lures, obfuscated PowerShell loaders, GitHub-hosted encrypted payloads, persistence via scheduled tasks, and AI-assisted tradecraft.
North Korean state-sponsored cyber espionage group conducting Operation GitPower, using spear-phishing, malicious LNK files, obfuscated PowerShell loaders, scheduled task persistence, GitHub-hosted C2 infrastructure, and AI-enabled workflows to support espionage operations.
Used quishing as part of spearphishing campaigns, embedding QR codes in emails to target think tanks, academic institutions, and government entities.
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.