Blue Team Cyber Defender

  Introductory room for the DFIR module Link - https://tryhackme.com/room/introductoryroomdfirmodule What does DFIR stand for? Digital Forensics and Incident Response DFIR requires expertise in two fields. One of the fields is Digital Forensics. What is the other field? Incident Response. Complete the timeline creation exercise in the attached static site. What is the flag that you get after completion? At what stage of the IR process are disrupted services brought back online as they were before the incident? recovery At what stage of the IR process is the threat evicted from the network after performing the forensic analysis? eradication What is the NIST-equivalent of the step called “Lessons learned” in the SANS process? Post-incident Activity That’s it! See you in the next Room :)

  Introducing cyber threat intelligence and related topics, such as relevant standards and frameworks. Link - https://tryhackme.com/room/cyberthreatintel What does CTI stand for? Cyber Threat Intelligence IP addresses, Hashes and other threat artefacts would be found under which Threat Intelligence classification? Technical Intel At which phase of the lifecycle is data made usable through sorting, organising, correlation and presentation? processing During which phase do security analysts get the chance to define the questions to investigate incidents? direction What sharing models are supported by TAXII? collection and channel When an adversary has obtained access to a network and is extracting data, what phase of the kill chain are they on? action on objectives What was the source email address? vipivillain@badbank.com What was the name of the file downloaded? flbpfuh.exe After building the threat profile, what message do you receive? After solving below you get code That’s it! See y

  Learn about fundamentals, methodology, and tooling for endpoint security monitoring. Link - https://tryhackme.com/room/introtoendpointsecurity What is the normal parent process of services.exe? wininit.exe What is the name of the network utility tool introduced in this task? tcpview What is the PowerShell cmdlet for viewing Windows Event Logs? get-winevent Provide the command used to enter OSQuery CLI. osqueryi What does EDR mean? Provide the answer in lowercase. Endpoint detection and response Provide the flag for the simulated investigation activity. That’s it! See you in the next Room :)

  Learn all the components that make up an email. Link- https://tryhackme.com/room/phishingemails1tryoe Email dates back to what time frame? 1970s What port is classified as Secure Transport for SMTP? 465 What port is classified as Secure Transport for IMAP? 993 What port is classified as Secure Transport for POP3? 995 What email header is the same as “Reply-to”? Return-Path Once you find the email sender’s IP address, where can you retrieve more information about the IP? http://www.arin.net/ In the above screenshots, what is the URI of the blocked image? https://i.imgur.com/lsw0tdi.png In the above screenshots, what is the name of the PDF attachment? payment-updateid.pdf In the attached virtual machine, view the information in email2.txt and reconstruct the PDF using the base64 data. What is the text within the PDF? Use Cyberchef from Base64 and save the output as a pdf file. Open the pdf. THM{BENIGN_PDF_ATTACHMENT} What trusted entity is this email masquerading as? Decode the subject

  You are involved in an incident response engagement and need to analyze an infected host using Redline. Link - https://tryhackme.com/room/revilcorp Upload the analysis file in Redline What is the compromised employee’s full name? John Coleman What is the operating system of the compromised host? Windows 7 Home Premium 7601 Service Pack 1 What is the name of the malicious executable that the user opened? WinRAR2021.exe What is the full URL that the user visited to download the malicious binary? (include the binary as well) http://192.168.75.129:4748/Documents/WinRAR2021.exe What is the MD5 hash of the binary? 890a58f200dfff23165df9e1b088e58f What is the size of the binary in kilobytes? 164 What is the extension to which the user’s files got renamed? .t48s39la What is the number of files that got renamed and changed to that extension? 48 What is the full path to the wallpaper that got changed by an attacker, including the image name? C:\Users\John Coleman\AppData\Local\Temp\hk8.bmp The

  Apply your analytical skills to analyze the malicious network traffic using Wireshark. Link - https://tryhackme.com/room/c2carnage After loading the pcap file in wireshark. Change the time display preferences. What was the date and time for the first HTTP connection to the malicious IP? (answer format: yyyy-mm-dd hh:mm:ss) check the HTTP traffic 2021–09–24 16:44:38 What is the name of the zip file that was downloaded? Check the contents of the packet documents.zip What was the domain hosting the malicious zip file? attirenepal.com Without downloading the file, what is the name of the file in the zip file? Right click the packet and follow HTTP stream chart-1530076591.xls What is the name of the webserver of the malicious IP from which the zip file was downloaded? LiteSpeed What is the version of the webserver from the previous question? PHP/7.2.34 Malicious files were downloaded to the victim host from multiple domains. What were the three domains involved with this activity? finejew