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Click to access symbolic-exec.pdf • Please see page 22. • An example: Sign in to like videos, comment, and subscribe. • Infecting machines in your corporate network during a worm analysis Tutorial – Finding Command on Angr • 2) Please strictly follow the format or the example answer on each • Information of the malware. • The command will be printed at the end (if found) • We provide a tool for you that helps to find command interpretation logic destroy_itself() within itself will have the score 50. submit. Understand and implement framebusting using the same extension to prevent malicious • Initializing the project I'm a MSECE student (non-thesis, FWIW) thinking about taking ECE6612/CS6262 Computer Network Security with Antonakakis. • Cuckoo (https://cuckoosandbox.org/) I don't have a strong CompE/CS background (more focused on Emag and Telecoms), so I'm wondering how difficult the class would be. You can’t run the testbed vm and cuckoo simultaneously. • ~/report/assignment-questionnaire.txt • Requirement • Translating that IR into a semantic representation A link to each Project regrade form will be sent following • Malware analyst use debugging/disassembler tool • Manifest Analysis Learn more. Sort tasks into columns by status. • Finding Command by Symbolic Execution How to the malware. • API/System Call. or obfuscator. • Do the same step for payload.exe (stage3) On September 24, 2014, a severe vulnerability in Bash was identified, and it is called Shellshock. • If something bad happens on your testbed, always revert back to the • X86, x86-64, arm64, etc. interpretation of the command and the execution of malicious behavior • .reloc • http://www.cs.cornell.edu/courses/cs412/2008sp/lectures/lec24.pdf • Observing C2 traffic • For obfuscation, we need to usually reverse engineer whether to CS 6262 Project 3 • Loading a binary into the analysis program • ~/report/assignment-questionnaire.txt • This command will update the current iptables rules… Scenario Ubuntu • http://bombshell.gtisc.gatech.edu/vm_2018.7z • HTTP header will give the answer Correct! • For stage2 and payload If you get an error when running cuckoo web because port 8000 is • How to run? For example, imagine an attacker who builds a web site that has a buttonon it that says “click here for a free iPod”. Test2: $command2 • After CFG analysis + symbolic execution, reconstruct the C2 • Please download and install the latest version or update your virtual box. • tap0 • Use xdot to open the generated CFG. • $workon cuckoo #Set virtualenv as cuckoo for both terminal1 and terminal2 Overview. • In the Virtual Machine (VM) • Password: analysis • We use the given VM for both Cuckoo and a testbed. • Run ‘signer.py sms.apk’ malware behaviors? • Let’s use cuckoo this time. • Win32 PE format information Code Example Receive command Project Structure • We need a secure experiment environment to execute the malware. Your task is to discover what, malware does by analt Project 3: Implementing an Index Manager. • You can write down command in the *.txt file as a line Tutorial – Control Flow Graph Analysis • Iptables rules Tips for assignment-questionnaire.txt • The purpose of CFG analysis is to find the exact logic that involves the A link to each Project regrade form will be sent following • Network Configurations • If you want halt the running malware. • CFG: • This will archive the answer sheet for submission (create a zip file) • Please discover that what payload is doing on the command from C&C • To upload a file, click the redbox and choose a file. • Run Windows XP Virtual Machine with virt-manager • Read ~/report/assignment-questionnaire.txt • Static Analysis TAs use a autograder for your • The malware does not exhibit its behavior because we did not send the CS6262_Group9_FinalReport 1. • Trace behaviors in time sequence. • Run ./init.py You can put/copy the file in/from Overview. • Start menu -> run -> taskmgr; or, press Ctrl-Shift-Esc on Windows. • More ref: • Run ~/archive.sh will automatically zip the whole files Then, click OK. • Run with ‘run-emulator’ Project: Malware Analysis CS 6262 Project 3 Agenda • Part 1: Analyzing Windows Malware • Part 2: Analyzing Android Malware Scenario • Analyzing Windows Malware • yzing iYou got a malware sample from the wild. • .data beginning of the other. • Why? • You can allow/disallow/redirect the traffic from the malware such a function) for the functions, then the tool will find where the malicious logic is, • If you provide the score (how malicious it is, or how likely the malicious logic will use • Wireshark (https://www.wireshark.org/) Tips • control-flow graph (CFG) analysis and symbolic execution to figure out the list of the • This implies that We know that 21 equals to 3 times 7. • For stage2.exe, please follow the same step on the tutorial • Analyze network traffic on the host, and figure out the list of available • A Virtual Machine for Malware analysis • sym-exec Tutorial – Control Flow Graph Analysis Add issues and pull requests to your board and prioritize them alongside note cards containing ideas or task lists. • Therefore, the malware(C2 client) will never unfold its behaviors. • Windows Part check the binary is obfuscated. • VM user credentials For checking alive C2 server? • Use the block_address, not the call sub_address • Zip the following files and upload to T-Square this wastes time We will not accept regrade requests via email, Piazza, or otherwise. • Then select Restart • Detailed guide on how to complete the Android section of the lab. Tutorial – Reading C2 Traffic • The grading script will ignore “http://”, “https://” and “www.” for your Github Cs6262 Github Cs6262. • shared • Once, virt-manager successfully calls the snapshot, click Show the graphical • Click OK whenever this dialog pops-up from the malware Find which server controls the malware (the command and control (C2) Broadcast receiver from CoinPirate’s malware family. • Write-up (~/Android/MaliciousMessenger/writeup.pdf) GT CS 6262: Network Security Project 1 : Advanced Web Security Summer 2020 The goals of this Tutorial – Upload a file to Cuckoo i+5 < j; i%2==0 error message that pops up) The goal of this project is to introduce students to machine learning techniques and methodologies, that help to differentiate between malicious and legitimate network traffic. data as symbolic variable, then tries to calculate expressions for the input along the How to Example – Symbolic execution engine • Make sure that no malware traffic goes out from the virtual machine • Use cfg-generation tool to figure out the address of the function of interests After you wrap up your work, close your project board to remove it from your active projects list. • IP Address: 192.168.133.1 the malware. Project Structure combine all conditions until it reaches to the target function. Advanced Tips • Web server access? Tutorial – Analysis on Cuckoo(Network Info) Code Example • Please install 7zip or p7zip • Let’s do symbolic execution to figure that out • Use taskmgr in Windows • Getting the domain name from an IP address (if packet is encrypted) • Choose br0 to capture the network traffic 1. Oh, organic chemistry is the best sellers. However, on top of thatweb page, the attacker has loaded an iframe with your mail account, andlined up exactly the “delete all messages” button directly on top of the“free iPod” button. • Edit iptables_rules to redirect the traffic to 128.61.240.66 to 192.168.133.1 (fake host) • Open apk file • Implies that this calls high score functions on its execution Homeworks 15%, four quizzes 15% each, a project 25%. correct command through our fake C2 server The Internet iptables • At the address of 40525a (marked as red) • Android Part • Please compare this result with your Wireshark’s result. • Modeling statements and environments • Please the following steps below. Understand well known vulnerabilities such as cross-site scripting (XSS) and detect XSS by developing a Chrome Browser Extension. answer for the URLs that include it The vulnerability can … • In the default settings, it will randomly send a command in the line • Identify commands that trigger any malicious behavior. Tutorial (for stage1.exe malware) Project Structure • Then redirect this traffic to 192.168.133.1, port 80. j=9 submit. Tutorial – Behavior Analysis on Cuckoo • It runs nginx and php script Add issues and pull requests to your board and prioritize them alongside note cards containing ideas or task lists. you are welcome to modify the VM performance settings (memory, • enp0s3 • Let’s take an example • Read carefully the writeup, answer on on ~/report/assignment-questionnaire.txt • Open class… • In the WireShark, we can notice that now the malware can communicate with in the VM • In WININET.dll, we can see the malware use http protocol. behavior. • Capturing & Recording inbound/outbound network packets • Read carefully the writeup, answer on on ~/report/assignment-questionnaire.txt • Analyzing Windows Malware 8. • Run ~/archive.sh will automatically zip the whole files • Emulator • What kinds of System call/API the malware use? • Static Analysis • Let’s make it to be redirected to our fake C2 server • network • Try to identify malicious function by editing score.h and cfg-generation tool • Goto ~/tools/network Project: Malware Analysis CS 6262 Project 3 Agenda • Part 1: Analyzing Windows Malware • Part 2: Analyzing Android Malware Scenario • Analyzing Windows Malware • yzing iYou got a malware sample from the wild. • This might be a dropper? • Use Control-flow Graph (CFG) analysis tool! • In network analysis tab, cuckoo provides more detailed info: payload, • Once you click the analyze button, will take some time to run the • Note: your graph and its memory addresses will vary from this example In essence, the attacker has “hijacked” the user’s click, hencethe name “Clickjacking”. Learn More. Tutorial – Redirect Network Connection What is clickjacking. Deadline: Nov 19, 2018, Monday, 11:45 pm, on Github. 18. 7 pages. • PE/ELF binary format • You can see the contents of the traffic by right-clicking on the line, then click • The C2 server is dead! analysis • We want to find a command that drives malware from 405190 to 40525a • Please halt first before you execute another malwares. • adb install sms.apk Tutorial – Control Flow Graph Analysis • How do you discover the malware’s behaviors? • Click on the Windows Start Menu and Turn off Computer. • Check its network access by Wireshark • ./sym-exec-on-addr ~/shared/stage1.exe 405190 40525a • Sms.apk (analysis target) • The order of commands in the file does not matter – they’ll run in a random order Hi , I wanted to know the kind of projects/assignments given in Network Security....It would really be helpful if I know what level of coding is required.It will also helpful if … • Run it as How to • Open a terminal Or Download a binary from the C2 server? • Getting the process name of the malware and the registery key that Tips • Windows binary use PE format • Required files for setting up the machine. Introduction. • Emulator • After redirecting, the result of cuckoo shows high-level information • NOTE! • Make sure you execute ./reset on that directory Course Syllabus: CS6262 Network Security 3 Regrade Requests Up to one week after each Project grade is released, you may submit one (and only one) regrade request. • We need to find the command that makes malware to convenience, but try to be thorough and match what you see exactly Set up a project board on GitHub to streamline and automate your workflow. Cs6200 project 3 Cs6200 project 3. • DO NOT MODIFY OR DELETE THE GIVEN SNAPSHOTS! Analysis tools Fake servers On to the next project! binary is packed. • From WireShark, we can notice that the malware tries to connect to the host VM Tutorial – Analysis on Cuckoo Type i, j Static Analysis • Timing/Artifact based VM detection • c2-command • Right-click the downloaded malware in Desktop, then click “Copy”. Internet connection to 128.61.240.66 • Search for C&C commands and trigger conditions • Part 2: Analyzing Android Malware • ~/Android/MaliciousMessenger/tutorialApps • Path explosion You got a malware sample from the wild. Welcome to our university. Symbolic Execution – Special Note for stage2.exe • Please check the content of zip file before submitting it to T-square. sequence. (http://angr.io/index.html) • Stack, heap, canary, guardian, etc. • Apktool You can always update your selection by clicking Cookie Preferences at the bottom of the page. • Open VirtualBox • Run jadx-gui Copyright. • Virtual Network fundamental material that you need to study. How to • br0 Tutorial – Finding Command on Angr that we provide. • You need to identify communication with C&C server We use optional third-party analytics cookies to understand how you use GitHub.com so we can build better products. • .idata This affects many systems. # Project 3 for CS 6250: Computer Networks # # This defines a DistanceVector (specialization of the Node class) # that can run the Bellman-Ford algorithm. • You should click OK on each dialog to dismiss it • Required files • The snapshot is 1501466914 • Type “virt-manager” and double click “winxpsp3” • Identifying Anti-analysis techniques • Read carefully the questionnaire, and answer them on ~/report/assignmentquestionnaire.txt download stage2.exe by updating itself. • Most malware are packed or obfuscated by a known/unknown packer • Starting C&C Server • Decompile • READ ~/Android/MaliciousMessenger/writeup.pdf You need to reconstruct it Tutorial – Analysis on Cuckoo(File Info) i+5 < j; i%2==0; j%3 == 0 • https://docs.oracle.com/cd/E26217_01/E26796/html/qs-import-vm.html • In ADVAPI32.dll, we can check the malware touch registry files this directory. • Conservative rules(allow network traffic only if it is secure) On September 24, 2014, a severe vulnerability in Bash was identified, and it is called Shellshock. • Does the malware create/read/write a file? • Then start capture by clicking on the shark-fin on the top left Command == • Attack Source & Destination • Encrypting your file during a ransomware analysis Set up triggering events to save time on project management—we’ll move tasks into the right columns for you. • Use nslookup (IP -> domain, and domain name -> IP vice versa) • We list down the functions or system calls the malware uses internally Project Structure • Always follow the page 21. Tutorial – Run the malware! • Based on the pre-information that we collected from the previous • vm Cs6262 github - eu.opportunitarisarcimento.it ... Cs6262 github Tutorial – Run Win XP VM Each card has a unique URL, making it easy to share and discuss individual tasks with your team. malware. • tools • You may not want: • Answer: Hack Yeah! • The answer sheet for project questionnaire. • Your job is to write each command on that *.txt file • A simplified tool for C2 server reconstruction it solves the expression to get an input that satisfies all of the conditions • Then look at the TCP stream data Tutorial – Analysis on Cuckoo Scenario • In the Virtual Machine (VM) • Use ’stage2’ and ‘payload’ as an argument respectively When the value of K is fixed, the K is often quite small, such as an integer in [1, 12]. • Objective Expressions • Question? 3. • This script updates the VM if any further update has been made by TA Test1: $command1 • Open Shared Directory and right-click, then click “paste” Command == • A network bridge between Windows XP and Ubuntu • Stage1.exe, stage2.exe, payload.exe Tutorial – Copy to Shared Directory Test3: $command3 CS6262 Network Security Assignment 4. • Packer/Obfuscation In summary, the students are introduced to: ... 3 Task B. at 128.61.240.66, but it fails • Windows, Linux and MacOs: http://www.7-zip.org/download.html • Malware is becoming more advanced. Add description, images, menus and links to your mega menu. Tutorial – Static Analysis on Cuckoo At the end, ‘launch-attack’ • Your job is to find the starting point of the function which interprets the (C2) server • E.g., not displaying the dialog box with “Starting Stage X malware” on start Cuckoo • Attack Activities • Your job is to write the score value per each function • NAT Redirect Syntax • Tracing a behavior(file/process/thread/registry/network) in time • http://ironhide.gtisc.gatech.edu/vm_2018.7z (~/tools/network/reset) Sign in. • 1) To get your credit for the project, you have to answer the questionnaire • Reveal C&C protocol already in use, run “sudo fuser -k 8000/tcp” and try again • Disassemble TAs use a autograder for your • Try to run stop_malware on the desktop Modifying registry? • To open cuckoo webserver, type the following URL into Chromium Please see page 17. The victim tries to click on the “free iPod” buttonbut instead actually clicked on the invisible “delete all messages”button. • The purpose of tracing analysis is to draw a big picture of the malware • Emulator • update.sh ‘remove’ command • The command and control server is dead. • Malware Watch Queue Queue How to All rights reserved. correct commands Your task is to discover what, Project: Malware Analysis CS 6262 Project 3, A Muslim Woman ’ s Right to Wear a Head Scarf at Work-Do you support the idea of anti-family responsibilities discrimination? ‘remove’ Clickjacking is an attack that tricks a user into clicking a webpage element which is invisible or disguised as another element. • By capturing and recording network packets through the tools, server) • If you find all commands for stage1.exe malware, the malware will enp0s3 (NAT Network) • But, in malware analysis, we are analyzing CFG in instruction-level. • Stage1.exe, stage2.exe, payload.exe • Fuzzing • IP Address: 10.0.2.15 (it varies by your VirtualBox settings) • Virtual Machine CS6262 Final Study Notes.docx. And you should think about each and mark if you think that is a good reason that would explain what makes aCS 6035 Prep. • Use the given Procmon in ProcessMonitor at the testbed VM If i+5 < j • Go to shared directory by clicking icon (in Windows XP) Participating in online discussion on Piazza. • https://www.virtualbox.org/wiki/Downloads That is your job for this project! 2. • .text • In the Virtual Machine (VM) • sub_4050c0 calls some internet related functions. • Unarchive the 7z file • This will read ~/tools/c2-command/stage*-command.txt environment. • What is symbolic execution? • As described in page 14, you will see a malware is downloaded. • Narrow the scope of analysis on ~/report/assignment-questionnaire.txt !!!!! Tips Analyzing Android Malware • Rebuilds apk files. View updated CS6262 - Project 2_ Advanced Web Security.pdf from CS 6262 at Amity University. • ~/tools/network/iptables_rules • An emulator for Android 4.4 is pre-installed • Redirect network traffic to fake host if required (if connection fails) CS6262 Network Security Assignment 4. • Important: be sure to put the ‘$’ character before you commands, even if stage*- Tutorial – Finding Command • This will open Android emulator. Tips Understand and implement framebusting using the same extension to prevent malicious Tutorial – Copy to Shared Directory • Run-time system behavioral tracing(File/Process/Thread/Registry) Tutorial – Analysis result on Cuckoo • This will stop all malware activity, and you can run in the clean state Command == Tutorial – Cuckoo Windows (QEMU) • report • You need to copy the malware into the Linux host to analyze. • And, there is a function (marked as sub) of score 12 Manifest Analysis Cs6262 project 2 Cs6262 project 2. Submitting Questionnaire Follow – TCP Stream • The score is the value at the end (all others are set as 1) directory. • Vet the app for any anti-analysis techniques that need to be removed. • Install • Configure your network firewall rules (iptables) by editing iptables-rules. • More. For more information, see our Privacy Statement. Tutorial – Reading C2 Traffic • The given Cuckoo uses the snapshot of the given testbed VM. • Strings, etc. Tips • ./sym-exec-on-addr [program_path] [start_address] [end_address] • READ ~/Android/MaliciousMessenger/writeup.pdf • Username: analysis • Read ~/report/assignment-questionnaire.txt • Then it will quit the current running malware. “http://scouter.cc.gatech.edu/a/b/c”, but some URLs may not include Tutorial – Run Win XP VM • A network that faces the Internet • Let fake connection can happen (redirect to 192.168.133.1) • Run ‘run-emulator’ • Constraint solving • Malicious apps are repackaged in benign apps with 1000’s of classes. • To analyze network behaviors, you need Replace these with start and Tutorial – Analysis on Cuckoo(Network Info) • A tutorial example (Shown as ‘My application’ in the emulator) We will only accept them through a Google Form submission. • apktool b sms –o sms.apk • Open wireshark (open a terminal. • Run apktool We will only accept them through a Google Form submission. Static Analysis • Complete the questionnaire as you go; try to avoid backtracking as Project Structure on ~/report/assignment-questionnaire.txt !!!!! • Download the VM dport 80 -j DNAT –to 192.168.133.1:80 • READ ~/Android/MaliciousMessenger/writeup.pdf • Then, type ”$uninstall” and save the file. Scenario • stage2.exe – stage 2 malware • Copy APK file before doing this. • Directories Project 2 : Advanced Web Security Summer 2019 T h e g o a l s o f t h i s p r o j e c t 1. Contribute to brymon68/cs-6262 development by creating an account on GitHub. • What is Symbolic Execution? • Higher score implies more functions related to the malicious activity is used with in the • The tools help you to analyze the malware with static and dynamic Quiz6.pdf Georgia Institute Of Technology Network Security CS 6262 - Spring 2019 ... Project 1a. We will not accept regrade requests via email, Piazza, or otherwise. and the malicious logic • ‘./reset’ command in this directory will apply the changes • You need to edit score.h to generate the control-flow graph 176 Cards – 2 Decks – 730 Learners • Discover the list of commands using the symbolic execution tool • Run `start_server` • ~/tools/cfg-generation/score.h Keep track of everything happening in your project and see exactly what’s changed since the last time you looked. Tutorial – Copy from Shared Directory • And if the protocol is tcp, source ip is matched with [source-ip-address], GT - CS6250. • Host: netscan.gtisc.gatech.edu Are there specific topics that you would cover in further legislation, a literature review of topic related to stress and health.

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