A red team exercise revealed that traditional IOCs (e.g., hash, IP, domain) for a known malware family were easily bypassed by polymorphic variants. The malware, however, consistently performs a unique sequence of API calls to inject code into legitimate processes: 'NtOpenProcess' -> 'NtAllocateVirtualMemory' -> 'NtWriteVirtualMemory' -> 'NtCreateRemoteThread'. To counter this, an XSIAM engineer needs to create a high-fidelity BIOC. Which of the following XQL queries best represents this behavioral pattern while minimizing false positives from legitimate applications performing similar operations?
Correct Answer: E
Option E is the most comprehensive and effective XQL query for this complex BIOC. Option A is too generic and will generate many false positives. Option B is closer but lacks crucial filters for common legitimate processes that might perform similar actions (e.g., debuggers, security tools) and doesn't specify a time window, which is critical for behavioral sequences. Option C is too specific to only the last step and might miss the full chain. Option D is too broad and only relies on reputation. Option E correctly uses the 'pattern' command to define the exact sequence of API calls, ensuring they occur within a specific 'time_window' and 'by' the same 'host_id' and 'process.pid'. Critically, it includes exclusions for 'target_process.name' (common legitimate injection targets like csrss.exe, winlogon.exe, explorer.exe, dwm.exe) and filters for 'stage_l .process.reputation != 'trusted" to reduce false positives while accurately targeting malicious injection attempts.
XSIAM-Engineer Exam Question 72
A cybersecurity firm develops a proprietary threat intelligence feed that delivers highly granular IOCs (IPs, domains, hashes, TTPs) with a confidence score and expiration time via a custom REST API that requires token-based authentication. They want to provide this feed to their XSIAM customers, enabling automated enrichment and proactive blocking. The integration must be robust, scalable, and ensure that IOCs are periodically refreshed and expired ones are removed from XSIAM. Which specific XSIAM integration components and logic should be recommended to their customers, and what are the critical design considerations for maintaining the freshness and accuracy of the IOCs in XSIAM?
Correct Answer: B
For a proprietary threat intelligence feed with custom APIs and dynamic expiration, the most effective and scalable solution for XSIAM customers is to leverage XSIAM Playbooks with 'Code' tasks. This allows for direct, authenticated interaction with the custom REST API, precise parsing of the granular IOCs, and accurate mapping to XSIAM 'Indicator' objects. Critically, the playbook can be scheduled to run periodically to refresh the feed and, importantly, manage expiration. The Python script within the playbook can query for indicators past their expiration time (or those flagged as expired by the feed) and update their status (e.g., 'set 'lifeCycleStatus': 'retired"). Key design considerations include securely storing the API token within XSIAM's vault, implementing robust error handling for API connectivity and data parsing, and efficiently processing potentially large volumes of IOCs. Proper mapping of custom IOC fields (like confidence scores and TTPs) to XSIAM's indicator attributes is vital for maximizing their utility in XSIAM's analytics and automation.
XSIAM-Engineer Exam Question 73
A Security Operations Center (SOC) team is leveraging Palo Alto Networks XSIAM for Attack Surface Management (ASM). They've identified a new critical vulnerability (CVE-2023-XXXX) affecting a specific version of Apache Tomcat running on several of their internal servers. The existing ASM detection rules do not specifically cover this CVE. Which of the following XSIAM capabilities would be most effective for a Security Engineer to quickly deploy a custom detection rule to identify instances of this vulnerable Tomcat version, considering both network-based and host-based telemetry?
Correct Answer: B
Option B is the most effective. XSIAM's XQL query capabilities are powerful for correlation across various telemetry sources (network, endpoint, cloud). A custom XQL query can precisely target the vulnerable Tomcat version using known attributes (e.g., product name, version number from software inventory, or specific HTTP headers in network traffic). Saving this as an ASM rule allows for continuous monitoring and alerting against the specified vulnerability across the attack surface. Options A and C are too broad or rely on pre-existing IOCs. Option D is reactive and not primarily for real-time detection rule creation. Option E might not be feasible or efficient for complex version detection.
XSIAM-Engineer Exam Question 74
A newly deployed XSIAM agent on a Windows 2019 server reports 'Connected' but 'Data Loss Prevention' and 'Host Insights' modules show 'Not Available'. Reviewing the agent's diagnostics file (panther. zip) shows the following excerpt from agent_status. j son: What are the two most probable causes for this specific issue?
Correct Answer: A,C
The 'Failed to load module 'panther_dlp.dll': (126) The specified module could not be found' error is key here. Error code 126 typically means the DLL file itself is either missing or cannot be accessed. This points strongly to either a corrupted/incomplete installation (A) where the DLLs were never properly placed, or a third-party security software (C) actively quarantining or blocking the loading of these legitimate XSIAM DLLs. Option B is incorrect because if the policy didn't include them, the status would likely be 'Disabled' or 'Not Configured', not 'Notlnitialized' with a 'module not found' error. Option D (missing runtimes) would usually result in a different error message related to dependency resolution. Option E (low disk space) would likely manifest as installation failures or other system-wide issues, not specifically a module loading error after installation.
XSIAM-Engineer Exam Question 75
An XSIAM engineer is tasked with optimizing ingested network flow data from a custom firewall, which exports logs in a highly structured, but non-standard, key-value pair format. The data includes fields like src_ip_addr, dst_port_num, and action_code. The goal is to quickly identify denied connections to specific high-value assets. Which XSIAM Data Flow configuration snippet best demonstrates the parsing and enrichment required to achieve this, assuming the raw log is received as a string?