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Kimsuky is a North Korea-aligned cyber-espionage threat actor known for targeting academic institutions, non-profit organizations, and other entities of intelligence interest. The name Stolen Pencil was used for an activity cluster later revoked in favor of Kimsuky, indicating the cluster is assessed to overlap with or represent the same actor. The group has conducted spear-phishing campaigns designed to steal credentials and maintain persistent access, including operations that abused a malicious Google Chrome extension to capture saved browser passwords and cookies. In observed campaigns, victims were lured through spoofed academic-themed websites and phishing emails, with follow-on activity including email-forwarding rules on compromised accounts to preserve access and monitor victim communications. Kimsuky has been associated with credential theft from web browsers, theft of browser cookies and sessions, and PowerShell-based keylogging. Reported capabilities include capturing keystrokes, harvesting credentials stored in browsers, and maintaining access after compromise. The actor’s targeting and tradecraft are consistent with intelligence collection rather than financially motivated crime. Available reporting ties the actor to North Korea and links its operations to long-running espionage activity focused in part on academia and research communities.
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.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
4 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Referenced as a revoked ATT&CK group (revoked by Kimsuky) in the October 2021 (v10) release notes; no operational details provided in this content.
Uses a tool that logs keystrokes to files under the user profile roaming path.
Activity cluster tied to a spear-phishing campaign delivering a malicious Chrome extension ('Auto Font Manager') to steal browser cookies and saved passwords; also linked via shared infrastructure to prior university intrusions involving Remote Desktop (RDP).
Use of tooling to obtain browser-stored credentials.
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.