CS0-003 · Question #60
An analyst notices there is an internal device sending HTTPS traffic with additional characters in the header to a known-malicious IP in another country. Which of the following describes what the…
The correct answer is A. Beaconing. The analyst has noticed beaconing, which is a common technique used by compromised internal devices to communicate with a command-and-control server.
Question
An analyst notices there is an internal device sending HTTPS traffic with additional characters in the header to a known-malicious IP in another country. Which of the following describes what the analyst has noticed?
Options
- ABeaconing
- BCross-site scripting
- CBuffer overflow
- DPHP traversal
How the community answered
(22 responses)- A86% (19)
- C5% (1)
- D9% (2)
Why each option
The analyst has noticed beaconing, which is a common technique used by compromised internal devices to communicate with a command-and-control server.
Beaconing refers to a compromised system periodically sending outbound communications to a command and control (C2) server, often disguised as legitimate traffic like HTTPS but with anomalies or covert data in headers. The description of 'additional characters in the header' to a 'known-malicious IP' strongly indicates this type of covert C2 communication.
Cross-site scripting (XSS) is a web vulnerability where malicious scripts are injected into trusted websites to target users' browsers, which does not fit the description of an internal device communicating with a malicious IP.
A buffer overflow is a software vulnerability that occurs when a program attempts to write data beyond its allocated buffer, often leading to crashes or code execution, not a description of network traffic patterns.
PHP traversal (or Path Traversal) is a web vulnerability allowing access to restricted directories and files by manipulating file paths, which is unrelated to an internal device sending specific traffic patterns to a malicious IP.
Concept tested: Command and Control (C2) beaconing detection
Source: https://learn.microsoft.com/en-us/microsoft-365/security/defender-for-endpoint/find-malicious-beaconing-using-network-data?view=o365-worldwide
Topics
Community Discussion
No community discussion yet for this question.