UTA0178
Also known as UNC5221, Red Dev 61, ARMORY CASTLE
While Volexity largely observed the attacker essentially living off the land, they still deployed a handful of malware files and tools during the course of the incident which primarily consisted of webshells, proxy utilities, and file modifications to allow credential harvesting. Once UTA0178 had access into the network via the ICS VPN appliance, their general approach was to pivot from system to system using compromised credentials. They would then further compromise credentials of users on any new system that was breached, and use these credentials to log into additional systems via RDP. Volexity observed the attacker obtaining credentials in a variety of ways.
Targets: Germany
CVEs in recent coverage
- 9.3CVE-2026-102764KEVBeyondTrust Remote Support · 5 mentions with this actor
- 9.9CVE-2026-1731KEVBeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) · 1 mention with this actor
Recent victims
No leak-site posts on record for this group.
Recent activity
- Exploited BeyondTrust Remote Support vulnerability CVE-2026-102764 now has full details and a public Metasploit module. Apply BT26-05-RS now. # BeyondTrust # Remastodon · Nov 2, 2026
- BeyondTrust disclosed a critical Remote Support flaw after Chinese APT Armory Castle exploited it as a zero-day for 47 days, using Sawfly web shell and Bareclawmastodon · Oct 24, 2026
- CVE-2026-102764: Critical BeyondTrust Remote Support Authentication Bypass Exploited in the Wildblog · Oct 19, 2026
- BeyondTrust security advisory (AV26-1054) – Update 1cccs · Oct 16, 2026
- AL26-025 - Critical vulnerability impacting BeyondTrust Remote Support – CVE-2026-102764cccs · Oct 16, 2026
- CISA Urges Patching Critical Vulnerability in BeyondTrust Remote Supportcisa · Oct 16, 2026
References
- https://www.volexity.com/blog/2024/01/10/active-exploitation-of-two-zero-day-vulnerabilities-in-ivanti-connect-secure-vpn/
- https://www.rewterz.com/rewterz-news/rewterz-threat-advisory-ivanti-vpn-zero-days-weaponized-by-unc5221-threat-actors-to-deploy-multiple-malware-families-active-iocs/
- https://www.mandiant.com/resources/blog/suspected-apt-targets-ivanti-zero-day
- https://quointelligence.eu/2024/01/unc5221-unreported-and-undetected-wirefire-web-shell-variant/
- https://www.volexity.com/blog/2024/01/18/ivanti-connect-secure-vpn-exploitation-new-observations/
- https://www.mandiant.com/resources/blog/investigating-ivanti-zero-day-exploitation
- https://www.bsi.bund.de/DE/Themen/Unternehmen-und-Organisationen/Cyber-Sicherheitslage/Analysen-und-Prognosen/Threat-Intelligence/Aktive_APT-Gruppen/aktive-apt-gruppen_node.html
- https://cloud.google.com/blog/topics/threat-intelligence/ivanti-post-exploitation-lateral-movement
- https://cloud.google.com/blog/topics/threat-intelligence/armory-castle-exploits-beyondtrust
From the MISP threat-actor galaxy, MITRE ATT&CK and RansomLook (CC BY 4.0). Activity is any post or advisory Watch Floor collected that names the actor or one of its aliases.
