Briefs

Modification of Access Control Lists (ACLs) on the Active Directory domain root object can grant attackers persistent and escalated privileges.

This analytic detects the addition of permissions required for a DCSync attack, specifically DS-Replication-Get-Changes, DS-Replication-Get-Changes-All, and DS-Replication-Get-Changes-In-Filtered-Set, leveraging Windows Security Event Log 5136 to identify when these permissions are granted, which indicates potential preparation for replicating AD objects and exfiltrating sensitive data.

This detection identifies an Active Directory access-control list (ACL) modification event, which applies the minimum required extended rights to perform the DCShadow attack by modifying permissions on the domainDNS object.

Detection of Active Directory user object ACL modifications that grant dangerous permissions, such as full control or the ability to modify permissions, potentially indicating privilege escalation or malicious activity.

Tanium released security advisories addressing vulnerabilities in Connect versions prior to Update 25 (v5.26.191), Update 19 (v5.29.237), and Update 9 (v5.37.140), potentially leading to unauthorized access and data compromise.

The compliance-trestle application is vulnerable to arbitrary file write via path traversal; the `-o/--output` argument in `trestle author jinja` allows writing files outside the intended workspace due to improper validation of path traversal characters, leading to potential CI/CD compromise or local code execution by overwriting sensitive files such as `.github/workflows/*.yml` or `.git/hooks/*`.

This analytic detects instances where prohibited network traffic is allowed, highlighting potential misconfigurations or policy violations that could lead to unauthorized access or data exfiltration, ultimately allowing attackers to bypass network defenses.

This analytic identifies potentially unauthorized devices attempting to connect to an organization's network by inspecting DHCP request packets and comparing MAC addresses against a list of known authorized devices.

The following analytic identifies modifications to the SourceAnchor (ImmutableId) attribute for an Azure Active Directory user, which is a step in setting up an Azure AD identity federation backdoor that allows an attacker to impersonate any user and bypass MFA.

This analytic identifies emails claiming to originate from domains similar to those being monitored for abuse by cross-referencing sender addresses with a lookup table of domain permutations, indicating potential phishing or brand impersonation.

This analytic detects a correlation between privileged account creation on Cisco IOS devices and subsequent inbound SSH connections to non-standard ports or sshd_operns, indicating persistence establishment following initial compromise.

Attackers create privileged accounts on Cisco IOS devices and then execute commands remotely via HTTP to gain privileged access.

This analytic identifies potential post-exploitation behaviors on a Windows system by monitoring multiple risk events and their associated MITRE ATT&CK tactics, indicating potential malicious actions following an initial compromise.

This analytic identifies instances where three or more distinct registry modification events associated with MITRE ATT&CK Technique T1112 are detected, leveraging Splunk's Risk data model to detect persistence, hiding malicious configurations, or erasing forensic evidence.

The analytic identifies potential threats related to the theft or forgery of authentication certificates by detecting when five or more analytics from the Windows Certificate Services story trigger within a specified timeframe, indicating an ongoing attack aimed at compromising authentication mechanisms that could grant unauthorized access to sensitive systems and data.

This correlation search identifies multiple risk events associated with 'Living Off The Land' activity, leveraging the Risk data model to aggregate events, focusing on systems with a high count of distinct sources, potentially enabling attackers to execute code, escalate privileges, or persist within the environment using trusted system utilities.

A Splunk correlation search identifies potential Linux persistence and privilege escalation activities based on risk scores and event counts from various Linux-related data sources, highlighting behaviors that could allow an attacker to maintain access or gain elevated privileges on a Linux system.

This correlation analytic identifies potential privilege escalation activities within an organization's Active Directory (AD) environment by correlating multiple analytics from the Active Directory Privilege Escalation analytic story within a specified time frame, helping identify coordinated attempts to gain elevated privileges which could lead to unauthorized access to sensitive systems and data.

This correlation identifies potential lateral movement activities within an Active Directory environment by correlating multiple analytics from the Active Directory Lateral Movement analytic story within a specified time frame, potentially leading to privilege escalation, access to sensitive information, and persistence within the environment.

This analytic identifies high-risk activities within repositories by correlating repository data with risk scores in DevSecOps environments, focusing on scores above 100 and sources with more than three occurrences to highlight potential vulnerabilities leading to data breaches or infrastructure compromise.

This analytic identifies potential AWS S3 exfiltration behavior by correlating multiple risk events related to Collection and Exfiltration techniques, leveraging AWS sources and focusing on instances where multiple unique analytics and distinct MITRE ATT&CK IDs are triggered for a specific risk object.

This correlation identifies when a user exceeds a risk threshold based on multiple suspicious Okta activities by aggregating risk events from 'Suspicious Okta Activity,' 'Okta Account Takeover,' and 'Okta MFA Exhaustion' analytic stories, highlighting potentially compromised user accounts exhibiting multiple TTPs that could lead to unauthorized access, privilege escalation, or persistence.

This analytic identifies web requests to domains that closely resemble a monitored brand's domain, indicating potential brand abuse indicative of phishing or malware distribution attempts.

This analytic detects the creation of suspicious mailbox rules in Office 365, a common technique used in Business Email Compromise (BEC) to hide emails by identifying rules with short or nonsensical names, marking emails as read, or moving them to specific folders.

This analytic detects internal systems generating an unusually high volume of intrusion detections within a 30-minute window using Cisco Secure Firewall Threat Defense logs, identifying hosts triggering more than 15 Snort-based signatures, which may indicate suspicious activity like malware execution, command-and-control communication, vulnerability scanning, or lateral movement.

OpenBao versions up to 2.5.3 allow cross-namespace lease revocation by exploiting legacy sys/revoke endpoints, potentially leading to unauthorized credential access and denial of service.

This rule detects potential privilege escalation attempts on Linux systems by monitoring the use of `unshare` with user namespace-related arguments followed by a UID change to root, indicating a transition to root and a potential local privilege escalation.

phpMyFAQ before 4.1.3 is vulnerable to an unauthenticated password reset, allowing attackers to change account passwords without token validation by sending crafted PUT requests to the /api/index.php/user/password/update endpoint.

phpMyFAQ before version 4.1.3 is vulnerable to an authentication bypass in the password reset endpoint, allowing unauthenticated attackers to reset any user account password without token verification or email confirmation, potentially leading to complete account takeover, including administrative access.

phpMyFAQ before 4.1.3 contains an insecure direct object reference vulnerability in the admin API user password endpoint that allows authenticated administrators to change any user's password without authorization verification, leading to privilege escalation.