Adversaries may attempt to get a listing of local system or domain accounts.
Example commands that can acquire this information are
net group , and
net localgroup using the Net utility or through use of dsquery. If adversaries attempt to identify the primary user, currently logged in user, or set of users that commonly uses a system, System Owner/User Discovery may apply.
On Mac, groups can be enumerated through the
id commands. In mac specifically,
dscl . list /Groups and
dscacheutil -q group can also be used to enumerate groups and users.
On Linux, local users can be enumerated through the use of the
/etc/passwd file which is world readable. In mac, this same file is only used in single-user mode in addition to the
Also, groups can be enumerated through the
admin@338 actors used the following commands following exploitation of a machine with LOWBALL malware to enumerate user accounts:
|Agent Tesla||Agent Tesla collects account information from the victim’s machine. |
APT1 used the commands
|APT3||APT3 has used a tool that can obtain info about local and global group users, power users, and administrators. |
APT32 enumerated administrative users and DC servers using the commands
|Bankshot||Bankshot gathers domain and account names/information through process monitoring. |
BRONZE BUTLER has used
Carbon runs the
Comnie uses the
|Dragonfly 2.0||Dragonfly 2.0 used batch scripts to enumerate users in the victim environment. |
|dsquery||dsquery can be used to gather information on user accounts within a domain. |
|Duqu||The discovery modules used with Duqu can collect information on accounts and permissions. |
|Empire||Empire can acquire local and domain user account information. |
|Epic||Epic gathers a list of all user accounts, privilege classes, and time of last logon. |
|FIN6||FIN6 has used Metasploit’s PsExec NTDSGRAB module to obtain a copy of the victim's Active Directory database. |
|GeminiDuke||GeminiDuke collects information on local user accounts from the victim. |
|InvisiMole||InvisiMole has a command to list account information on the victim’s machine. |
|Kazuar||Kazuar gathers information on local groups and members on the victim’s machine. |
Ke3chang performs account discovery using commands such as
Kwampirs collects a list of accounts with the command
|menuPass||menuPass has used the Microsoft administration tool csvde.exe to export Active Directory data. |
Mis-Type may create a file containing the results of the command
|MURKYTOP||MURKYTOP has the capability to retrieve information about users on remote hosts. |
OilRig has run
|OSInfo||OSInfo enumerates local and domain users |
|Poseidon Group||Poseidon Group searches for administrator accounts on both the local victim machine and the network. |
|PoshC2||PoshC2 can enumerate local and domain user account information. |
|POWERSTATS||POWERSTATS can retrieve usernames from compromised hosts. |
POWRUNER may collect user account information by running
|PUNCHBUGGY||PUNCHBUGGY can gather user names. |
|Pupy||Pupy uses PowerView and Pywerview to perform discovery commands such as net user, net group, net local group, etc. |
RATANKBA uses the
|Remsec||Remsec can obtain a list of users. |
S-Type runs the command
|SHOTPUT||SHOTPUT has a command to retrieve information about connected users. |
Sykipot may use
Threat Group-3390 has used
|TrickBot||TrickBot collects the users of the system.  |
|Operating System Configuration||
Prevent administrator accounts from being enumerated when an application is elevating through UAC since it can lead to the disclosure of account names. The Registry key is located
System and network discovery techniques normally occur throughout an operation as an adversary learns the environment. Data and events should not be viewed in isolation, but as part of a chain of behavior that could lead to other activities, such as Lateral Movement, based on the information obtained.
Monitor processes and command-line arguments for actions that could be taken to gather system and network information. Remote access tools with built-in features may interact directly with the Windows API to gather information. Information may also be acquired through Windows system management tools such as Windows Management Instrumentation and PowerShell.
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