Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects attempts to exploit CVE-2021-36934 (HiveNightmare/SeriousSAM) by monitoring for unauthorized access to SAM, SYSTEM, or SECURITY hive files within Volume Shadow Copies, or the use of icacls/vssadmin to facilitate this credential access.
Detects attempts to exploit CVE-2021-36934 (HiveNightmare/SeriousSAM) by monitoring for unauthorized access to SAM, SYSTEM, or SECURITY hive files within Volume Shadow Copies, or the use of icacls/vssadmin to facilitate this credential access.
Detects attempts to exploit CVE-2021-36934 (HiveNightmare/SeriousSAM) by monitoring for unauthorized access to SAM, SYSTEM, or SECURITY hive files within Volume Shadow Copies, or the use of icacls/vssadmin to facilitate this credential access.
Detects attempts to exploit CVE-2021-36934 (HiveNightmare/SeriousSAM) by monitoring for unauthorized access to SAM, SYSTEM, or SECURITY hive files within Volume Shadow Copies, or the use of icacls/vssadmin to facilitate this credential access.
The analytic detects the use of PowerShell commands to copy the SAM, SYSTEM, or SECURITY hives, which are critical for credential theft. It leverages PowerShell Script Block Logging (EventCode=4104) to capture and analyze the full command executed. This activity is significant as it indicates an attempt to exfiltrate sensitive registry hives for offline password cracking. If confirmed malicious, this could lead to unauthorized access to credentials, enabling further compromise of the system and potential lateral movement within the network.
The following analytic detects attempts to access the SAM, SYSTEM, or SECURITY database files within the `windows\system32\config` directory using Windows Security EventCode 4663. This detection leverages Windows Security Event logs to identify unauthorized access attempts. Monitoring this activity is crucial as it indicates potential credential access attempts, possibly exploiting vulnerabilities like CVE-2021-36934. If confirmed malicious, an attacker could extract user passwords, leading to unauthorized access, privilege escalation, and further compromise of the system.
Detects the creation of files that resemble exports of the local Security Account Manager (SAM) database. This activity is often associated with credential dumping techniques used by adversaries to obtain local user hashes. The rule specifically looks for common filenames and paths used when dumping the SAM hive, including those related to known exploits like CVE-2021-36934 and tools like ShadowSteal and hivenightmare.
Detects the creation of files that look like exports of the local SAM (Security Account Manager)
This rule detects the creation of files with specific naming conventions that are indicative of tools exploiting the HiveNightmare (CVE-2021-36934) vulnerability to export the Security Account Manager (SAM) database. The rule looks for various file names and patterns used by different implementations of HiveNightmare exploitation tools, including those written in Go, C++, PowerShell, and C#.
Detects files written by the different tools that exploit HiveNightmare