Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
7 followers9,573 downloads10,253 copies160 likes55,632 views
8,655 detections
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Detects the execution of rundll32.exe from common user-writable or temporary directories (Temp, AppData, ProgramData), which is a common technique used by malware to execute payloads while avoiding security monitoring of standard system directories.
Detects attempts to bypass User Account Control (UAC) by either modifying the registry key associated with the ms-settings protocol handler or by executing the fodhelper.exe binary via cmd.exe. These techniques are commonly used by attackers to gain elevated privileges without triggering a UAC prompt.
Detects high-frequency file modifications or renames targeting file extensions commonly associated with ransomware. The rule monitors for a threshold of more than 20 file operations within a short timeframe by a specific process on an endpoint, indicating a potential mass encryption event.
Detects the use of vssadmin.exe or wmic.exe to delete Volume Shadow Copies. This is a common technique used by ransomware and other malware to prevent system recovery and impede incident response efforts.
Detects the use of bitsadmin.exe to initiate file transfers, downloads, or file additions using HTTP protocols. This utility is frequently abused by adversaries for Ingress Tool Transfer by downloading malicious payloads from remote systems.
Detects instances where the Windows Management Instrumentation service (wmiprvse.exe) initiates potentially suspicious child processes often associated with lateral movement or remote command execution, such as command shells, scripting interpreters, or binary execution utilities.
Detects Microsoft Office applications (Word, Excel, PowerPoint, Outlook) launching common shell or utility processes (cmd, powershell, wscript, cscript, mshta, regsvr32, rundll32). This behavior is a common indicator of macro-based attacks or malicious document execution where Office applications are abused to launch secondary payloads or execute code.
Detects modifications or creations of registry values within common Windows auto-start locations, specifically the 'Run' and 'Winlogon' keys. These locations are frequently abused by adversaries to maintain persistence on a host. The rule excludes common, legitimate installer and administration processes to reduce noise.
Detects usage of the built-in Windows utility 'certutil.exe' with parameters commonly used to download files from remote URLs, such as '-urlcache' or '-verifyctl'. This behavior is frequently exploited by adversaries to perform ingress tool transfer and fetch malicious payloads.
Detects the creation of a scheduled task using schtasks.exe where the command line includes indicators of potential script execution or remote command execution (cmd.exe, powershell.exe, wscript.exe, cscript.exe, or 'http'). This is a common pattern for persistence mechanisms involving staged payloads.
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