EXPLORE DETECTIONS
Successful Overpass the Hash Attempt
Detects successful logon with logon type 9 (NewCredentials) which matches the Overpass the Hash behavior of e.g Mimikatz's sekurlsa::pth module.
Suspect Svchost Activity
It is extremely abnormal for svchost.exe to spawn without any CLI arguments and is normally observed when a malicious process spawns the process and injects code into the process memory space.
Suspicious Access to Sensitive File Extensions
Detects known sensitive file extensions accessed on a network share
Suspicious Access to Sensitive File Extensions - Zeek
Detects known sensitive file extensions via Zeek
Suspicious Active Directory Database Snapshot Via ADExplorer
Detects the execution of Sysinternals ADExplorer with the "-snapshot" flag in order to save a local copy of the active directory database to a suspicious directory. This can be used by attackers to extract data for Bloodhound, usernames for password spraying or use the meta data for social engineering. The snapshot doesn't contain password hashes but there have been cases, where administrators put passwords in the comment field.
Suspicious Activity in Shell Commands
Detects suspicious shell commands used in various exploit codes (see references)
Suspicious AddinUtil.EXE CommandLine Execution
Detects execution of the Add-In deployment cache updating utility (AddInutil.exe) with suspicious Addinroot or Pipelineroot paths. An adversary may execute AddinUtil.exe with uncommon Addinroot/Pipelineroot paths that point to the adversaries Addins.Store payload.
Suspicious Advpack Call Via Rundll32.EXE
Detects execution of "rundll32" calling "advpack.dll" with potential obfuscated ordinal calls in order to leverage the "RegisterOCX" function
Suspicious AgentExecutor PowerShell Execution
Detects execution of the AgentExecutor.exe binary. Which can be abused as a LOLBIN to execute powershell scripts with the ExecutionPolicy "Bypass" or any binary named "powershell.exe" located in the path provided by 6th positional argument
Suspicious Appended Extension
Detects file renames where the target filename uses an uncommon double extension. Could indicate potential ransomware activity renaming files and adding a custom extension to the encrypted files, such as ".jpg.crypted", ".docx.locky", etc.
Suspicious Application Allowed Through Exploit Guard
Detects applications being added to the "allowed applications" list of exploit guard in order to bypass controlled folder settings
Suspicious Application Installed
Detects suspicious application installed by looking at the added shortcut to the app resolver cache
Suspicious ArcSOC.exe Child Process
Detects script interpreters, command-line tools, and similar suspicious child processes of ArcSOC.exe. ArcSOC.exe is the process name which hosts ArcGIS Server REST services. If an attacker compromises an ArcGIS Server system and uploads a malicious Server Object Extension (SOE), they can send crafted requests to the corresponding service endpoint and remotely execute code from the ArcSOC.exe process.
Suspicious ASPX File Drop by Exchange
Detects suspicious file type dropped by an Exchange component in IIS into a suspicious folder
Suspicious Autorun Registry Modified via WMI
Detects suspicious activity where the WMIC process is used to create an autorun registry entry via reg.exe, which is often indicative of persistence mechanisms employed by malware.
Suspicious Base64 Encoded User-Agent
Detects suspicious encoded User-Agent strings, as seen used by some malware.
Suspicious Binaries and Scripts in Public Folder
Detects the creation of a file with a suspicious extension in the public folder, which could indicate potential malicious activity.
Suspicious Binary In User Directory Spawned From Office Application
Detects an executable in the users directory started from one of the Microsoft Office suite applications (Word, Excel, PowerPoint, Publisher, Visio)
Suspicious Binary Writes Via AnyDesk
Detects AnyDesk writing binary files to disk other than "gcapi.dll". According to RedCanary research it is highly abnormal for AnyDesk to write executable files to disk besides gcapi.dll, which is a legitimate DLL that is part of the Google Chrome web browser used to interact with the Google Cloud API. (See reference section for more details)
Suspicious BitLocker Access Agent Update Utility Execution
Detects the execution of the BitLocker Access Agent Update Utility (baaupdate.exe) which is not a common parent process for other processes. Suspicious child processes spawned by baaupdate.exe could indicate an attempt at lateral movement via BitLocker DCOM & COM Hijacking.
Suspicious Browser Activity
Indicates anomalous behavior based on suspicious sign-in activity across multiple tenants from different countries in the same browser
Suspicious Browser Child Process - MacOS
Detects suspicious child processes spawned from browsers. This could be a result of a potential web browser exploitation.
Suspicious C2 Activities
Detects suspicious activities as declared by Florian Roth in its 'Best Practice Auditd Configuration'. This includes the detection of the following commands; wget, curl, base64, nc, netcat, ncat, ssh, socat, wireshark, rawshark, rdesktop, nmap. These commands match a few techniques from the tactics "Command and Control", including not exhaustively the following; Application Layer Protocol (T1071), Non-Application Layer Protocol (T1095), Data Encoding (T1132)
Suspicious Cabinet File Execution Via Msdt.EXE
Detects execution of msdt.exe using the "cab" flag which could indicates suspicious diagcab files with embedded answer files leveraging CVE-2022-30190