AdversaryGraph public intelligence page

This page is part of Threat Matrix, the public browser workspace for the main AdversaryGraph platform. Use it for ATT&CK pivots, actor and technique context, similarity leads, detection coverage review, and analyst-ready investigation paths.

Validation disclaimer: TTP overlap, actor similarity, generated summaries, and coverage findings are investigation leads, not attribution proof or operational validation without analyst review.

Main AdversaryGraph project Documentation Malware Analysis GitHub

T1531 · impact · 2 actors · 0 correlated reports

Account Access Removal

Adversaries may interrupt availability of system and network resources by inhibiting access to accounts utilized by legitimate users. Accounts may be deleted, locked, or manipulated (ex: changed credentials) to remove access to accounts. Adversaries may also subsequently log off and/or perform a System Shutdown/Reboot to set malicious changes into place. In Windows, Net utility, Set-LocalUser and Set-ADAccountPassword PowerShell cmdlets may be used by adversaries to modify user accounts. In Linux, the passwd utility may be used to change passwords. Accounts could also be disabled by Group Policy. Adversaries who use ransomware or similar attacks may first perform this and other Impact behaviors, such as Data Destruction and Defacement, in order to impede incident response/recovery before completing the Data Encrypted for Impact objective.

Open detection, hunting, mitigation, and evidence workspace

Detection logic

Use process monitoring to monitor the execution and command line parameters of binaries involved in deleting accounts or changing passwords, such as use of Net. Windows event logs may also designate activity associated with an adversary's attempt to remove access to an account: * Event ID 4723 - An attempt was made to change an account's password * Event ID 4724 - An attempt was made to reset an account's password * Event ID 4726 - A user account was deleted * Event ID 4740 - A user account was locked out Alerting on Net and these Event IDs may generate a high degree of false positives, so compare against baseline knowledge for how systems are typically used and correlate modification events with other indications of malicious activity where possible.

Observed actors

Correlated CTI and IR reports

Cyber Knowledge context

Use these routes to move from the ATT&CK behavior into explanation, implementation, evidence handling, validation, and defensive operations. Relevance is generated from explicit identifiers/names and governed topic mappings; it is not attribution evidence.

MITRE mitigations

No ATT&CK mitigation relationship is published for this technique. Apply risk-based controls and verify scope.

MITRE detection strategies and analytics

DET0120 · Account Access Removal via Multi-Platform Audit Correlation
  • AN0334 · Analytic 0334 — Correlated user account modification (reset, disable, deletion) events with anomalous process lineage (e.g., PowerShell or net.exe from an interactive session), especially outside of IT admin change windows or by non-admin users.
  • AN0335 · Analytic 0335 — Password changes or account deletions via 'passwd', 'userdel', or 'chage' preceded by interactive shell or remote command execution from non-privileged accounts.
  • AN0336 · Analytic 0336 — Execution of dscl or sysadminctl commands to disable, delete, or modify users combined with anomalous process ancestry or terminal session launch.
  • AN0337 · Analytic 0337 — Invocation of esxcli 'system account remove' from vCLI, SSH, or vSphere API with anomalous user access or outside maintenance windows.
  • AN0338 · Analytic 0338 — O365 UnifiedAuditLog entries for Remove-Mailbox or Set-Mailbox with account disable or delete actions correlated with suspicious login locations or MFA bypass.
  • AN0339 · Analytic 0339 — Deletion or disablement of user accounts in platforms like Okta, Salesforce, or Zoom with anomalies in admin session attributes or mass actions within short duration.
MITRE detection source

Continue the investigation