Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
35 detections
Filters
Last updated
All Time
Detection languages
25
5
1
1
1
Contributors
9
8
8
3
2
Categories
16
10
5
4
3
Platforms
23
12
1
Products / Services
8
8
7
2
1
MITRE Techniques
18,115
15,635
12,576
8,388
6,215
IDS Classtypes
1
IDS Protocols
1
Detects the creation of a local administrative account with a hidden naming convention (ending in $) accompanied by a cluster of registry modifications designed to obscure the account from the logon screen, enable WDigest plaintext credential caching, relax RDP authentication requirements (disable NLA, enable RDP), and disable UAC remote restrictions. This activity is highly indicative of post-exploitation persistence and credential harvesting configurations following initial access via SQL server exploitation.
Detects the creation of a local user account followed by the modification of the Winlogon SpecialAccounts\UserList registry key to hide the account from the Windows logon UI. This behavior is indicative of persistent access maintenance by adversaries, such as the Andariel threat group.
Detects registry modifications consistent with Blind Eagle's Hidden RDP (HRDP) module, which disables Network Level Authentication (NLA) on the RDP listener and hides a local admin account from the Windows login screen via the SpecialAccounts\UserList registry key, as part of enabling covert RDP access reverse-tunneled to a C2 server.
Detects registry modifications consistent with Blind Eagle's Hidden RDP (HRDP) module, which disables Network Level Authentication (NLA) on the RDP listener and hides a local admin account from the Windows login screen via the SpecialAccounts\UserList registry key, as part of enabling covert RDP access reverse-tunneled to a C2 server.
Detects registry modifications consistent with Blind Eagle's Hidden RDP (HRDP) module, which disables Network Level Authentication (NLA) on the RDP listener and hides a local admin account from the Windows login screen via the SpecialAccounts\UserList registry key, as part of enabling covert RDP access reverse-tunneled to a C2 server.
Detects creation of hidden user accounts via SpecialAccounts registry key
Detects modifications to the `/Library/Preferences/com.apple.loginwindow.plist` file on macOS. This file can be abused by adversaries to establish persistence by configuring login hooks or other autostart mechanisms.
Hidden User Use Case Monitors dslocal user plist modifications for IsHidden, indicating a concealed local account created or modified outside standard account management workflows.
Detects modifications to the `/Library/Preferences/com.apple.loginwindow.plist` file on macOS. This file can be abused by adversaries to establish persistence by configuring login hooks or other autostart mechanisms.
Detects setting IsHidden on a macOS user record to suppress the account from the login screen.
Maps to Atomic Red Team test "Create Hidden User using IsHidden option" (T1564.002).
Maps to Atomic Red Team test "Create Hidden User using IsHidden option" (T1564.002).
Hidden User Use Case Monitors dslocal user plist modifications for IsHidden, indicating a concealed local account created or modified outside standard account management workflows.
Detects enabling Hide500Users in com.apple.loginwindow plist preferences, which suppresses
sub-500 UID accounts from the login screen and System Settings.
sub-500 UID accounts from the login screen and System Settings.
Detects hiding a user home folder with chflags, complementing account-level hiding
documented in T1564.002.
documented in T1564.002.
Detects hiding a user home folder with chflags, complementing account-level hiding, documented in T1564.002.
Detects delete/create sequences on the same /Users/ path within a short time window,
consistent with account attribute laundering during hidden user setup.
consistent with account attribute laundering during hidden user setup.
Detects enabling Hide500Users in com.apple.loginwindow preferences, which suppresses
sub-500 UID accounts from the login screen and System Settings.
sub-500 UID accounts from the login screen and System Settings.
This Suricata rule detects network traffic on TCP port 445 (SMB) that contains the strings "SpecialAccounts" and "UserList" (case-insensitive). This pattern is indicative of an attempt to hide a user account on a Windows system by modifying the registry's SpecialAccounts\UserList key. This technique is often used by adversaries for defense evasion.
Detects potential suspicious behaviour using secedit.exe. Such as exporting or modifying the security policy
Hidden User Creation
Sigma
Detects creation of a hidden user account on macOS (UserID < 500) or with IsHidden option
Detects changes to the registry key "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\Userlist" where the value is set to "0" in order to hide user account from being listed on the logon screen.
Detects modifications to the registry key "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\Userlist" where the value is set to "0" in order to hide user account from being listed on the logon screen.
Page 1 of 2