T1133 · ATT&CK technique
External Remote Services
28 actors on record using it
Every mark is an actor ATT&CK records using this technique. Red ones also exploit a CVE in CISA KEV.
Open T1133 on attack.mitre.orgAdversaries may leverage external-facing remote services to initially access and/or persist within a network. Remote services such as VPNs, Citrix, and other access mechanisms allow users to connect to internal enterprise network resources from external locations. There are often remote service gateways that manage connections and credential authentication for these services. Services such as Windows Remote Management and VNC can also be used externally.
Source: MITRE ATT&CK, T1133. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.
Every one of the 28 is a mark on the map. Named now: 1 to 26, most on record first.
- APT28
- Kimsuky
- APT41
- APT29
- Sandworm
- OilRig
- Wizard Spider
- Threat Group-3390
- Volt Typhoon
- Berserk Bear
- Leviathan
- Scattered Spider
- Chimera
- Handala Hack
- Ke3chang
- FIN13
- Ember Bear
- TeamTNT
- Blind Eagle
- GALLIUM
- LAPSUS$
- Play
- Sea Turtle
- Akira
- APT18
- Velvet Ant
Zoom in on the map and the dots under the middle of it are named where they are.
Data as of 2026-11-15. CVE List through 2026-11-15 · EPSS of 2026-11-15 · CISA KEV checked 2026-11-15. Sources: MITRE ATT&CK (© The MITRE Corporation, reproduced and distributed with its permission), the MISP Galaxy (CC0), and CyberSIXT's own coverage.