T1021.004: SSH
| View on MITRE ATT&CK | T1021.004 |
|---|---|
| Tactic(s) | Lateral Movement |
Data from MITRE ATT&CK®:
Adversaries may use Valid Accounts to log into remote machines using Secure Shell (SSH). The adversary may then perform actions as the logged-on user.
SSH is a protocol that allows authorized users to open remote shells on other computers. Many Linux and macOS versions come with SSH installed by default, although typically disabled until the user enables it. The SSH server can be configured to use standard password authentication or public-private keypairs in lieu of or in addition to a password. In this authentication scenario, the user’s public key must be in a special file on the computer running the server that lists which keypairs are allowed to login as that user.
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Cyber Threat Graph Context
Explore how this ATT&CK Technique relates to the wider threat graph
Reporting on this Technique
Fortinet Zero-Day and Custom Malware Used by Suspected Chinese Actor in Espionage Operation
This blog post by threat researchers at Mandiant outlines intrusions activity by the UNC3886 intrusion set which involved the deployment of ...
People's Republic of China-Linked Cyber Actors Hide in Router Firmware
This Cybersecurity Advisory from CISA and partners details activities of the People's Republic of China (PRC)-linked cyber actors known as ...
StopRansomware: Rhysida Ransomware
This is a joint Cybersecurity Advisory by the Federal Bureau of Investigation (FBI), Cybersecurity and Infrastructure Security Agency (CISA), and ...
Mitigations for this technique
MITRE ATT&CK Mitigations
Multi-factor Authentication
Use two or more pieces of evidence to authenticate to a system; such as username and password in addition to a token from a physical smart card or token generator.User Account Management
Manage the creation, modification, use, and permissions associated to user accounts.Disable or Remove Feature or Program
Remove or deny access to unnecessary and potentially vulnerable software to prevent abuse by adversaries.How to detect this technique
MITRE ATT&CK Data Components
Network Connection Creation (Network Traffic)
Initial construction of a network connection, such as capturing socket information with a source/destination IP and port(s) (ex: Windows EID 5156, Sysmon EID 3, or Zeek conn.log)Logon Session Creation (Logon Session)
Initial construction of a successful new user logon following an authentication attempt. (e.g. Windows EID 4624, /var/log/utmp, or /var/log/wmtp)Process Creation (Process)
The initial construction of an executable managed by the OS, that may involve one or more tasks or threads. (e.g. Win EID 4688, Sysmon EID 1, cmd.exe > net use, etc.)Control Validation Tests for this Technique
Use Atomic Red Team tests to test your defenses against this technique.
Sigma Detections for this Technique
SP800-53 Controls
See which controls can help protect against this MITRE ATT&CK technique. This is based on mappings to associated SP800-53 controls produced by the MITRE Engenuity Center for Threat-Informed Defense.