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| Section | Objectives |
|---|---|
| Topic 1: Detection and Analysis of Threats | - Analyzing security events and logs - Identifying indicators of compromise (IOCs) |
| Topic 2: Cisco Security Technologies for Defense | - Endpoint, network, and cloud security integrations - Cisco Secure X and XDR capabilities |
| Topic 3: Threat Hunting Methodologies | - Threat hunting lifecycle and hypotheses development - Data sources and telemetry analysis using Cisco security tools |
| Topic 4: Incident Response and Containment | - Containment and mitigation using Cisco security solutions - Response workflows and escalation procedures |
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NEW QUESTION # 33
Refer to the exhibit.
A security engineer notices that a Windows Batch script includes calls to suspicious APIs. How will the script affect the system when it is executed?
Answer: B
Explanation:
The correct answer isFiles are encrypted. The exhibit shows a collection of API calls and strings that strongly indicatecryptographic operations associated with file encryption, a common behavior in ransomware and data-encrypting malware.
Key indicators in the script include multiple Windows Cryptographic API function calls such as:
* CryptAcquireContextW
* CryptCreateHash
* CryptHashData
* CryptDeriveKey
* CryptEncrypt
* CryptDecrypt
* CryptDestroyKey
* CryptReleaseContext
These APIs are part of theWindows CryptoAPI, which is explicitly used to generate cryptographic keys, hash data, and encrypt or decrypt content. The presence of ADVAPI32.dll further confirms cryptographic functionality, as this library provides access to Windows security and encryption services.
Additionally, registry-related APIs such as RegSetValueExA, RegOpenKeyExA, and references to:
Software\Microsoft\Windows\CurrentVersion\Run
indicate that the script may also establishpersistence, ensuring the encryption routine executes again after reboot. However, persistence is secondary; the primary functional behavior shown is encryption.
Option A is incorrect because there are no APIs related to disabling networking (such as InternetSetOption or firewall manipulation). Option B is incorrect because retrieving host version information would involve system query APIs like GetVersionEx, which are not present. Option C is incorrect because although the word sleep appears, it is commonly used by malware to delay execution or evade sandboxes-not to place the system into sleep mode.
From a threat hunting and malware analysis perspective, the combination ofCryptoAPI usage, registry modification, and internet-related APIs (InternetReadFile, InternetQueryDataAvailable) is a classic ransomware pattern: retrieve data or keys, encrypt local files, and possibly communicate with command-and- control infrastructure.
Professional defenders recognize these API patterns ashigh-confidence malicious indicators, often mapped toMITRE ATT&CK - Impact: Data Encrypted for Impact (T1486). Detecting such behavior early is critical to prevent widespread data loss and operational disruption.
In summary, the script's API usage clearly indicates thatits execution results in file encryption, making Option Dthe correct answer.
NEW QUESTION # 34
Which threat modeling approach is best suited for identifying systemic threats in a software environment?
Answer: A
NEW QUESTION # 35
A threat hunter wants to detect credential dumping attempts that bypass traditional malware detection. Which telemetry source is MOST effective for this purpose?
Answer: A
Explanation:
The correct answer isendpoint memory access telemetry. Credential dumping often involves accessing sensitive memory regions, such as LSASS, rather than deploying obvious malware.
Modern attackers frequently use:
* Legitimate tools
* In-memory techniques
* Living-off-the-land binaries
These methods bypass file-based detection entirely. Email, DNS, and firewall logs provide limited visibility into memory-level abuse.
Endpoint memory telemetry enables detection of:
* Unauthorized LSASS access
* Suspicious handle requests
* Abnormal process injection
This telemetry is foundational for detectingcredential access techniquesin modern environments. Therefore, optionBis correct.
NEW QUESTION # 36
A SOC using Cisco security technologies wants to measure the success of its threat hunting program over time. Which metric BEST reflects increased threat hunting maturity?
Answer: B
Explanation:
The correct answer isreduction in attacker dwell time. Dwell time measures how long an attacker remains undetected in the environment.
As threat hunting maturity increases:
* Detection becomes faster
* Behavioral coverage improves
* Attackers are identified earlier in the kill chain
Metrics such as alert volume or blocked IPs (Options A and D) do not reflect effectiveness and may even indicate excessive noise. Option B measures inputs, not outcomes.
Cisco'sCBRTHD blueprintfocuses onoutcomes, not activity. Reduced dwell time demonstrates:
* Effective hunting
* Better visibility
* Stronger detection engineering
This metric directly correlates with reduced breach impact and improved resilience.
Therefore,Option Cis the correct and Cisco-aligned answer.
NEW QUESTION # 37
How does TaHiTI contribute to cybersecurity practices?
Answer: D
NEW QUESTION # 38
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