Blue Team Cyber Defender

  Learn the different indicators of phishing attempts by examining actual phishing emails. Link- https://tryhackme.com/room/phishingemails1tryoe What phrase does the gibberish sender email start with? noreply What is the root domain for each URL? Defang the URL. devret[.]xyz This email sample used the names of a few major companies, their products, and logos such as OneDrive and Adobe. What other company name was used in this phishing email? Citrix What should users do if they receive a suspicious email or text message claiming to be from Netflix? forward the message to phishing@netflix.com What does BCC mean? Blind Carbon Copy What technique was used to persuade the victim to not ignore the email and act swiftly? Urgency What is the name of the executable that the Excel attachment attempts to run? regasms.exe 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

  Introduction to x64 Assembly on Windows. Link- https://tryhackme.com/room/win64assembly What is 0xA in decimal? 10 What is decimal 25 in hexadecimal? Include the prefix for hexadecimal. 0x19 How many bytes is a WORD? 2 How many bits is a WORD? 16 What is the result of the binary operation: 1011 AND 1100? 1000 What is the result of the binary operation: 1011 NAND 1100? Include leading zeroes. 0111 How many bytes is RAX? 8 How many bytes is EAX? 4 What instruction returns from a function? ret What instruction will call/execute a function? call What instruction could be used to save a register in a way that it can later be restored? PUSH If two equal values are compared to each other, what will ZF be set to as result of the comparison? 1 In fastcall, what 64-bit register will hold the return value of a function? RAX In fastcall, what register is the first function parameter passed in? RCX In what order is data taken off of or put onto the stack? Provide the acronym. LIFO That’s it! See

  A guided room covering the deployment of honeypots and analysis of botnet activities Link - https://tryhackme.com/room/introductiontohoneypots Create a file and then log back in is the file still there? (Yay/Nay) Nay How many passwords include the word “password” or some other variation of it e.g “p@ssw0rd” 15 What is arguably the most common tool for brute-forcing SSH? hydra What intrusion prevention software framework is commonly used to mitigate SSH brute-force attacks? Fail2Ban What CPU does the honeypot “use”? Run command cat /proc/cpuinfo Intel(R) Core(TM) i9–11900KB CPU @ 3.30GHz Does the honeypot return the correct values when uname -a is run? (Yay/Nay) Nay What flag must be set to pipe wget output into bash? -O How would you disable bash history using unset ? unset HISTFILE What brand of device is the bot in the first sample searching for? (BotCommands/Sample1.txt) Do a simple google search of the processes Mikrotik What are the commands in the second sample changing? (Bot

  Learn how to use Nmap to discover live hosts using ARP scan, ICMP scan, and TCP/UDP ping scan. Link - https://tryhackme.com/room/nmap01 Send a packet with the following: From computer1 To computer1 (to indicate it is broadcast) Packet Type: “ARP Request” Data: computer6 (because we are asking for computer6 MAC address using ARP Request) How many devices can see the ARP Request? 4 Did computer6 receive the ARP Request? (Y/N) N Send a packet with the following: From computer4 To computer4 (to indicate it is broadcast) Packet Type: “ARP Request” Data: computer6 (because we are asking for computer6 MAC address using ARP Request) How many devices can see the ARP Request? 4 Did computer6 reply to the ARP Request? (Y/N) Y What is the first IP address Nmap would scan if you provided 10.10.12.13/29 as your target? 10.10.12.8 How many IP addresses will Nmap scan if you provide the following range 10.10.0-255.101-125 ? 6400 Send a packet with the following: From computer1 To computer3 Packet T

  Practice analyzing malicious traffic using Brim. Link - https://tryhackme.com/room/mastermindsxlq [Infection 1] Provide the victim’s IP address. Load infection1.pcap in Brim Check the source IP of “Http Requests” 192.168.75.249 The victim attempted to make HTTP connections to two suspicious domains with the status ‘404 Not Found’. Provide the hosts/domains requested. cambiasuhistoria.growlab.es, www.letscompareonline.com The victim made a successful HTTP connection to one of the domains and received the response_body_len of 1,309 (uncompressed content size of the data transferred from the server). Provide the domain and the destination IP address. Check the “Http Requests” ww25.gocphongthe.com,199.59.242.153 How many unique DNS requests were made to cab[.]myfkn[.]com domain (including the capitalized domain)? Check “Unique DNS Queries” 7 Provide the URI of the domain bhaktivrind[.]com that the victim reached out over HTTP. Check the “Http Requests” /cgi-bin/JBbb8/ Provide the IP addr

  Manipulating DNS queries to our advantage Link - https://tryhackme.com/room/dnsmanipulation If you were on Windows, what command could you use to query a txt record for ‘youtube.com’? nslookup -type=txt youtube.com If you were on Linux, what command could you use to query a txt record for ‘facebook.com’? dig facebook.com TXT AAAA stores what type of IP Address along with the hostname? IPv6 Maximum characters for a DNS TXT Record is 256. (Yay/Nay) Nay What DNS Record provides a domain name in reverse-lookup? (Research) PTR What would the reverse-lookup be for the following IPv4 Address? (192.168.203.2) (Research) 2.203.168.192.in-addr.arpa What is the maximum length of a DNS name? (Research) (Length includes dots!) 253 What is the Transaction name? (Type it as you see it) Network Equip. How much was the Firewall? (Without the $) 2500 Which file contains suspicious DNS queries? cap3.pcap Enter the plain-text after you have decoded the data using packetyGrabber.py found in ~/dns-exfil-i

Learn the various ways of discovering hidden or private content on a webserver that could lead to new vulnerabilities. Link - https://tryhackme.com/room/contentdiscovery What is the Content Discovery method that begins with M? Manually What is the Content Discovery method that begins with A? Automated What is the Content Discovery method that begins with O? OSINT What is the directory in the robots.txt that isn’t allowed to be viewed by web crawlers? Check the robots.txt file /staff-portal What framework did the favicon belong to? Download the file and upload to virustotal to get hash and then check the mentioned website for the hash. cgiirc What is the path of the secret area that can be found in the sitemap.xml file? Check the sitemap /s3cr3t-area What is the flag value from the X-FLAG header? Run the curl command What is the flag from the framework’s administration portal? Go to mentioned website and find the location /thm-framework-login and login with username and password “admin”

Manually review a web application for security issues using only your browsers developer tools. Hacking with just your browser, no tools or scripts. Link- https://tryhackme.com/room/walkinganapplication Go to the website https://LAB_WEB_URL.p.thmlabs.com Right click and view page source What is the flag from the HTML comment? Go to /new-home-beta to find flag What is the flag from the secret link? Go to /secret-page What is the directory listing flag? Go to /assets and then read flag.txt What is the framework flag? Go to the above link Check the Change Log Go to /tmp.zip and download the file. It will have the flag What is the flag behind the paywall? Follow the instructions mentioned to reveal the flag What is the flag behind the paywall? Follow the instructions mentioned to reveal the flag What is the flag shown on the contact-msg network request? Follow the instructions mentioned to reveal the flag That’s it. See you in the next Room :)