T1033Discovery
System Owner/User Discovery
Adversaries may attempt to identify the primary user, currently logged in user, set of users that commonly uses a system, or whether a user is actively using the system. They may do this, for example, by retrieving account usernames or by using OS Credential Dumping. The information may be collected in a number of different ways using other Discovery techniques, because user and username details…
CVEs2
In CISA KEVThe US Cybersecurity and Infrastructure Security Agency’s list of Known Exploited Vulnerabilities. A CVE is added when CISA has evidence that attackers are using it.2
Reports0
Detections
30 Sigma rules tagged T1033System Owner/User DiscoveryT103330 general rules
- Potential Dridex Activitycriticalstable
- Renamed Whoami Executioncriticaltest
- Chopper Webshell Process Patternhightest
- HackTool - SharpLdapWhoami Executionhightest
- HackTool - SharpView Executionhightest
- Possible DCSync Attackhightest
- Security Privileges Enumeration Via Whoami.EXEhightest
- SharpHound Recon Sessionshightest
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CVEs linked to System Owner/User Discovery
2 CVEs, by priority. Each link shows its badge.- CVE-2023-22518Atlassian Confluence Data Center and Server Improper Authorization VulnerabilityAtlassian · Confluence Data Center and ServerKEVRansomwarePublic exploitCritical · 9.8T1190Exploit Public-Facing ApplicationT1033System Owner/User Discovery+1 moreMITRE CTID mapping of the KEV entry · primary impact>99.9%Top 0.01%79.9priority
- CVE-2024-4577PHP-CGI OS Command Injection VulnerabilityPHP Group · PHPKEVRansomwarePublic exploitCritical · 9.8T1190Exploit Public-Facing ApplicationT1059Command and Scripting Interpreter+10 moreMITRE CTID mapping of the KEV entry · follow-on activity>99.9%Top 0.02%79.9priority