TryHackMe – Warzone 2 writeup

Warzone 2 is another blue team-focused room on TryHackMe, following up on the previous one I discussed. I didn’t find this particularly challenging, but it provided enough scope to practice my triaging skills.

Table of Contents

Scenario

You work as a Tier 1 Security Analyst L1 for a Managed Security Service Provider (MSSP). Again, you’re tasked with monitoring network alerts.

An alert triggered: Misc activity, A Network Trojan Was Detected, and Potential Corporate Privacy Violation.

The case was assigned to you. Inspect the PCAP and retrieve the artifacts to confirm this alert is a true positive.

Your tools: Brim, Network Miner, Wireshark.

Investigation

What was the alert signature for A Network Trojan was Detected?
ET MALWARE Likely Evil EXE download from MSXMLHTTP non-exe extension M2
What was the alert signature for Potential Corporate Privacy Violation?
ET POLICY PE EXE or DLL Windows file download HTTP
What was the IP to trigger either alert? Enter your answer in a defanged format.
The answer can be seen in the above screenshots.
Provide the full URI for the malicious downloaded file. In your answer, defang the URI.
awh93dhkylps5ulnq-be[.]com/czwih/fxla[.]php?l=gap1[.]cab
What is the name of the payload within the cab file?
To find this information I downloaded the .cab file using wireshark and uploaded it on my AttackBox. Then I opened the .cab file and looked at the files inside it, there was the version.txt file with the code and the filename of the payload.
What is the user-agent associated with this network traffic?
What other domains do you see in the network traffic that are labelled as malicious by VirusTotal? Enter the domains defanged and in alphabetical order. (format: domain[.]zzz,domain[.]zzz)
a-zcorner[.]com,knockoutlights[.]com
There are IP addresses flagged as Not Suspicious Traffic. What are the IP addresses? Enter your answer in numerical order and defanged. (format: IPADDR,IPADDR)
64[.]225[.]65[.]166,142[.]93[.]211[.]176
For the first IP address flagged as Not Suspicious Traffic. According to VirusTotal, there are several domains associated with this one IP address that was flagged as malicious. What were the domains you spotted in the network traffic associated with this IP address? Enter your answer in a defanged format. Enter your answer in alphabetical order, in a defanged format. (format: domain[.]zzz,domain[.]zzz,etc)
safebanktest[.]top, tocsicambar[.]xyz, ulcertification[.]xyz
Now for the second IP marked as Not Suspicious Traffic. What was the domain you spotted in the network traffic associated with this IP address? Enter your answer in a defanged format. (format: domain[.]zzz)