Objective 1.2CS0-003

1.2 Given a scenario, analyze indicators of potentially malicious activity.

Objective 1.2 sits in Security Operations, which carries 33% of the CySA+ exam. The questions below are original, written from the official objective title above, and each explanation cites the CompTIA page it rests on.

Objective title verbatim from the official objectives. CompTIA exam page

A worked example

Shown solved, with the whole explanation open: this is what every question here carries.

1-2Security OperationsModerate

An analyst finds regular HTTPS POSTs to an unfamiliar domain, each returning short encoded replies at fixed intervals. Which activity best fits?

Command and control over web protocolsCorrect · your answerCorrect: periodic command-shaped HTTPS to an unknown host matches web-protocol C2.
A misconfigured software update clientUpdate clients pull sizable signed packages on their own cadence, not tiny encoded replies.
Normal content delivery cachingA cache serves content back to clients; it does not send steady POSTs outbound to one domain.
A search engine crawler indexing the hostCrawlers issue GETs across many pages, not repeated POSTs to a single endpoint.

Correct.

Concept

Adversaries hide command channels inside protocols that are already ubiquitous, so the traffic blends with legitimate web flows. Regular timing and command-shaped exchanges give the beacon away, not the protocol.

Why A

ATT&CK describes web-protocol C2 as embedding commands and their results inside HTTP/S traffic to mimic expected flows; the steady interval and short encoded responses are the beaconing pattern.

#c2#network-indicators#attack

Now you: objective 1.2 questions

No account needed. The explanation opens when you answer.

Sample question 1 of 3

1-2Security OperationsHard

A workstation beacons over HTTPS. An analyst proposes blocking the destination port to stop it. What is the flaw in that plan?

Sample question 2 of 3

1-2Security OperationsModerate

A file named svch0st.exe runs from a user's Downloads folder and spawns network connections. Which technique does the naming suggest?

Sample question 3 of 3

1-2Security OperationsModerate

An analyst sees the legitimate archiver renamed and executed from a temp directory just before a large outbound transfer. Which masquerading form is this?

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Read the sources

These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.

More objectives in Security Operations