Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects remote RPC calls to possibly abuse remote encryption service via MS-EFSR. This rule specifically looks for EventID 3 in the RPCFW EventLog, indicating a blocked or audited RPC call, and targets the InterfaceUUIDs associated with the Encrypting File System Remote (EFSR) protocol.
Detects remote RPC calls to possibly abuse remote encryption service via MS-EFSR
The analytic detects network share access requests indicative of the PetitPotam attack (CVE-2021-36942). It leverages Windows Event Code 5145, which logs attempts to access network share objects. This detection is significant as PetitPotam can coerce authentication from domain controllers, potentially leading to unauthorized access. If confirmed malicious, this activity could allow attackers to escalate privileges or move laterally within the network, posing a severe security risk. Ensure Event Code 5145 is enabled via Group Policy to utilize this analytic effectively.
The analytic detects a suspicious Kerberos Ticket Granting Ticket (TGT) request, identified by Event Code 4768. This detection leverages Windows Security Event Logs to identify TGT requests with unusual fields, specifically a non-empty CertThumbprint, which may indicate the use of tools like Rubeus following the exploitation of CVE-2021-36942 (PetitPotam). This activity is significant as it can signal an attacker leveraging a compromised certificate to request Kerberos tickets, potentially leading to unauthorized access. If confirmed malicious, this could allow attackers to escalate privileges and persist within the environment, posing a severe security risk.