Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
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This rule monitors Cisco Unified Communications Manager (UCM) environments for multiple stages of an attack chain, including potential Server-Side Request Forgery (SSRF) attempts against administrative interfaces, suspicious file modifications by service accounts, indicators of privilege escalation, and anomalous outbound network connections from core Cisco processes.
Detects a suspicious execution chain potentially associated with Deed RAT (used by Mustang Panda/Twill Typhoon), consisting of DLL sideloading by a legitimate signed executable followed by persistence mechanism creation (Registry Run keys or Scheduled Tasks) on the same host. Additionally, it identifies devices exhibiting repeated outbound connections to the same remote public IP over multiple days, serving as an indicator of potential re-compromise or persistent C2.
This rule detects a multi-stage attack chain on macOS involving a browser or mail client spawning a shell to download a file (DMG) via curl/wget, followed by the mounting of that disk image, execution of an application bundle from the mounted volume, and a subsequent outbound network connection from that application. This behavior is indicative of a user-initiated malware execution chain.
This rule correlates multiple suspicious activities indicative of ransomware or destructive attacks. It detects a combination of volume shadow copy deletion, bulk file modifications, creation of suspicious scheduled tasks, and network connections occurring during periods of high file write activity. The rule triggers when multiple signals are observed or when specific high-fidelity destructive indicators are present.
Detects suspicious activities within a Veeam backup environment, including unauthorized process spawning by Veeam services, LSASS memory access, destruction of backup catalogs or restore points via PowerShell, and unauthorized access to Veeam database files by non-Veeam processes.
This rule detects the presence and execution of known FortiBleed malware components based on their filenames and SHA256 hashes. It monitors both process creation events and file events to identify the malware.
This rule detects the presence and execution of known FortiBleed malware components based on their filenames and SHA256 hashes. It monitors both process creation events and file events to identify the malware.
Detects a specific beaconing pattern associated with Fog Ransomware, characterized by a non-browser process making OAuth2 token requests to Google accounts followed by Drive/Sheets API calls, correlated with the deletion of volume shadow copies (VSS) for recovery inhibition.
This rule monitors for suspicious activity related to Microsoft Exchange servers and potential DLL side-loading. It detects the creation of web shell files (.aspx, .ashx, .asmx) in Exchange-related directories, the execution of command shells (cmd, powershell) by the IIS worker process (w3wp.exe) within Exchange, and the side-loading of DLLs by specific signed binaries (dfsvc.exe, rasautou.exe) from non-standard directories.
Detects successful non-interactive token acquisitions using specific Microsoft first-party application IDs known to bypass Entra Conditional Access Policies through Nested App Authentication (NAA/BroCI). The detection specifically targets sign-ins to the Microsoft Graph resource.
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