CEH v13 312-50v13 Exam Dumps

CEH v13 describes Agent Smith–style attacks as malicious Android operations where an app silently replaces legitimate applications by exploiting weaknesses in the Android app update and installation processes. These attacks often begin when users download seemingly innocent apps from untrusted third-party marketplaces. Once installed, the malicious application injects harmful code into other apps, overwriting them while preserving their icons and interface, allowing the attacker to harvest credentials, display ads, or maintain persistence without detection. CEH explains that this technique takes advantage of Android’s APK structure, sideloading vulnerabilities, and lack of signature validation in compromised environments. Simjacker (Option A) targets SIM toolkit vulnerabilities and does not replace apps. Man-in-the-Disk (Option B) abuses external storage operations but does not overwrite applications. Camfecting (Option D) refers to hijacking smartphone cameras. The described malicious replacement of legitimate apps exactly matches the Agent Smith attack pattern.

The CEH web server attack methodology describes reconnaissance as a key phase, where testers gather publicly available information before attempting exploitation. Robots.txt is commonly used by administrators to instruct web crawlers about which directories should not be indexed. CEH emphasizes that attackers regularly review robots.txt because it often exposes sensitive directories unintentionally, providing valuable intelligence about internal structure, configuration paths, administrative pages, and potential weak points. In this scenario, the tester observes “Disallow” entries and then discovers the directories are not protected by authentication, allowing direct access to sensitive files. This falls under information gathering through exposed indexing instructions rather than directory traversal, which involves path-manipulation exploits. The tester is not altering file paths or inserting traversal sequences; instead, they are reviewing publicly available indexing instructions and discovering misconfigured access controls. This perfectly aligns with the reconnaissance phase of the CEH methodology, where attackers learn about server architecture using passive or minimally intrusive techniques.

According to the CEH IDS/IPS module, false positives occur when legitimate activity is incorrectly flagged as malicious. The most common cause is overly sensitive IDS rules or thresholds.

Option D correctly identifies this issue.

Option A describes the symptom, not the root cause.

Option B is unrelated to IDS alert behavior.

Option C can cause missed detections, not excessive alerts.

CEH recommends proper tuning and baseline profiling.

According to the CEH Network and Perimeter Security module, one of the most effective and widely used firewall evasion techniques is the use of encrypted communication channels. When traffic is encrypted using protocols such as HTTPS, TLS, or VPN tunnels, traditional firewalls and packet-inspection tools may be unable to inspect payload contents unless SSL/TLS inspection is explicitly enabled.

CEH documentation explains that attackers commonly encrypt command-and-control (C2) traffic to:

Blend in with legitimate encrypted traffic

Bypass content-based inspection

Evade signature-based detection

Option B is therefore correct.

Option A (IP spoofing) is less effective against stateful firewalls.

Option C is a human-focused attack, not firewall evasion.

Option D has no relevance to firewall bypass techniques.

CEH highlights encryption misuse as a major blind spot in perimeter defenses.