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XScreen is an Objective-C macOS surveillance implant and keylogger observed in a June 2025 intrusion investigated by Huntress and attributed with high confidence to the North Korean threat group TA444 / BlueNoroff (also tracked as Sapphire Sleet, COPERNICIUM, STARDUST CHOLLIMA, and CageyChameleon). In that campaign, a cryptocurrency foundation employee was socially engineered via Telegram, a Calendly lure, and a fake Zoom meeting featuring deepfake participants into downloading a malicious AppleScript disguised as a Zoom extension. XScreen was one of eight malicious binaries recovered from the victim host. Its capabilities include keystroke logging, clipboard monitoring, and screen capture. Reported implementation details state that it uses Core Graphics EventTapCreate for keylogging, CGDisplayCreateImage for screen capture, and monitors the macOS pasteboard for clipboard theft. XScreen defaulted to the C2 URL https://metamask[.]awaitingfor[.]site/update and could also read a C2 URL from /Users/Shared/._cfg. The recovered binary was named keyboardd, was compiled in Objective-C by user "pooh," and Huntress reported SHA256 432c720a9ada40785d77cd7e5798de8d43793f6da31c5e7b3b22ee0a451bb249. High-confidence associated infrastructure includes metamask[.]awaitingfor[.]site. The malware was deployed as part of a broader BlueNoroff macOS intrusion set targeting cryptocurrency organizations.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
2 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
XScreen (keyboardd): a keylogger written in Objective-C that has capability to monitor keystrokes, the clipboard, and the screen.
XScreen (keyboardd): a keylogger written in Objective-C that has capability to monitor keystrokes, the clipboard, and the screen.
3 distinct techniques documented for this family, organized by ATT&CK tactic.
3 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
IPs, domains, and DNS infrastructure linked to this family.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
Other indicator types observed in public reporting.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Objective-C keylogger/surveillance tool that captures keystrokes, clipboard contents, and screen data and exfiltrates it to C2.
An Objective-C surveillance implant that logs keystrokes, tracks the active application, monitors clipboard contents, captures screenshots from active displays, and sends collected data to its C2 server.
A keylogger deployed in the BlueNoroff campaign to capture victim keystrokes.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.