Sigma Rules
75 rules found for "X__Junior (Nextron Systems)"
Obfuscated IP Download Activity
Detects use of an encoded/obfuscated version of an IP address (hex, octal...) in an URL combined with a download command
Obfuscated IP Via CLI
Detects usage of an encoded/obfuscated version of an IP address (hex, octal, etc.) via command line
Suspicious Process Execution From Fake Recycle.Bin Folder
Detects process execution from a fake recycle bin folder, often used to avoid security solution.
Suspicious Windows Service Tampering
Detects the usage of binaries such as 'net', 'sc' or 'powershell' in order to stop, pause, disable or delete critical or important Windows services such as AV, Backup, etc. As seen being used in some ransomware scripts
Potential ReflectDebugger Content Execution Via WerFault.EXE
Detects execution of "WerFault.exe" with the "-pr" commandline flag that is used to run files stored in the ReflectDebugger key which could be used to store the path to the malware in order to masquerade the execution flow
Wusa.EXE Executed By Parent Process Located In Suspicious Location
Detects execution of the "wusa.exe" (Windows Update Standalone Installer) utility by a parent process that is located in a suspicious location. Attackers could instantiate an instance of "wusa.exe" in order to bypass User Account Control (UAC). They can duplicate the access token from "wusa.exe" to gain elevated privileges.
Enable Remote Connection Between Anonymous Computer - AllowAnonymousCallback
Detects enabling of the "AllowAnonymousCallback" registry value, which allows a remote connection between computers that do not have a trust relationship.
Uncommon Extension In Keyboard Layout IME File Registry Value
Detects usage of Windows Input Method Editor (IME) keyboard layout feature, which allows an attacker to load a DLL into the process after sending the WM_INPUTLANGCHANGEREQUEST message. Before doing this, the client needs to register the DLL in a special registry key that is assumed to implement this keyboard layout. This registry key should store a value named "Ime File" with a DLL path. IMEs are essential for languages that have more characters than can be represented on a standard keyboard, such as Chinese, Japanese, and Korean.
Suspicious Path In Keyboard Layout IME File Registry Value
Detects usage of Windows Input Method Editor (IME) keyboard layout feature, which allows an attacker to load a DLL into the process after sending the WM_INPUTLANGCHANGEREQUEST message. Before doing this, the client needs to register the DLL in a special registry key that is assumed to implement this keyboard layout. This registry key should store a value named "Ime File" with a DLL path. IMEs are essential for languages that have more characters than can be represented on a standard keyboard, such as Chinese, Japanese, and Korean.
Potential Goofy Guineapig Backdoor Activity
Detects a specific broken command that was used by Goofy-Guineapig as described by the NCSC report.
Potential Goofy Guineapig GoolgeUpdate Process Anomaly
Detects "GoogleUpdate.exe" spawning a new instance of itself in an uncommon location as seen used by the Goofy Guineapig backdoor
Small Sieve Malware File Indicator Creation
Detects filename indicators that contain a specific typo seen used by the Small Sieve malware.
Potential CVE-2023-36884 Exploitation Dropped File
Detects a specific file being created in the recent folder of Office. These files have been seen being dropped during potential exploitations of CVE-2023-36884
Potential COLDSTEEL Persistence Service DLL Creation
Detects the creation of a file in a specific location and with a specific name related to COLDSTEEL RAT
COLDSTEEL RAT Service Persistence Execution
Detects the creation of an "svchost" process with specific command line flags, that were seen present and used by ColdSteel RAT
DarkGate - User Created Via Net.EXE
Detects creation of local users via the net.exe command with the name of "DarkGate"
Potential Qakbot Rundll32 Execution
Detects specific process tree behavior of a "rundll32" execution often linked with potential Qakbot activity.
Qakbot Rundll32 Exports Execution
Detects specific process tree behavior of a "rundll32" execution with exports linked with Qakbot activity.
Qakbot Rundll32 Fake DLL Extension Execution
Detects specific process tree behavior of a "rundll32" execution where the DLL doesn't have the ".dll" extension. This is often linked with potential Qakbot activity.
Rorschach Ransomware Execution Activity
Detects Rorschach ransomware execution activity
Peach Sandstorm APT Process Activity Indicators
Detects process creation activity related to Peach Sandstorm APT
Potential Peach Sandstorm APT C2 Communication Activity
Detects potential C2 communication activity related to Peach Sandstorm APT
Potential KamiKakaBot Activity - Lure Document Execution
Detects the execution of a Word document via the WinWord Start Menu shortcut. This behavior was observed being used by KamiKakaBot samples in order to initiate the 2nd stage of the infection.
Potential KamiKakaBot Activity - Shutdown Schedule Task Creation
Detects the creation of a schedule task that runs weekly and execute the "shutdown /l /f" command. This behavior was observed being used by KamiKakaBot samples in order to achieve persistence on a system.
Commvault QLogin Argument Injection Authentication Bypass (CVE-2025-57791)
Detects the use of argument injection in the Commvault qlogin command - potential exploitation for CVE-2025-57791. An attacker can inject the `-localadmin` parameter via the password field to bypass authentication and gain a privileged token.
Access To Chromium Browsers Sensitive Files By Uncommon Applications
Detects file access requests to chromium based browser sensitive files by uncommon processes. Could indicate potential attempt of stealing sensitive information.
Access To Browser Credential Files By Uncommon Applications
Detects file access requests to browser credential stores by uncommon processes. Could indicate potential attempt of credential stealing. Requires heavy baselining before usage