CS 3700 Networks and Distributed Systems
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Botnets, Cybercrime, and Cyberterrorism: Vulnerabilities and Policy Issues for Congress
Order Code RL32114 Botnets, Cybercrime, and Cyberterrorism: Vulnerabilities and Policy Issues for Congress Updated January 29, 2008 Clay Wilson Specialist in Technology and National Security Foreign Affairs, Defense, and Trade Division Botnets, Cybercrime, and Cyberterrorism: Vulnerabilities and Policy Issues for Congress Summary Cybercrime is becoming more organized and established as a transnational business. High technology online skills are now available for rent to a variety of customers, possibly including nation states, or individuals and groups that could secretly represent terrorist groups. The increased use of automated attack tools by cybercriminals has overwhelmed some current methodologies used for tracking Internet cyberattacks, and vulnerabilities of the U.S. critical infrastructure, which are acknowledged openly in publications, could possibly attract cyberattacks to extort money, or damage the U.S. economy to affect national security. In April and May 2007, NATO and the United States sent computer security experts to Estonia to help that nation recover from cyberattacks directed against government computer systems, and to analyze the methods used and determine the source of the attacks.1 Some security experts suspect that political protestors may have rented the services of cybercriminals, possibly a large network of infected PCs, called a “botnet,” to help disrupt the computer systems of the Estonian government. DOD officials have also indicated that similar cyberattacks from individuals and countries targeting economic, -
A the Hacker
A The Hacker Madame Curie once said “En science, nous devons nous int´eresser aux choses, non aux personnes [In science, we should be interested in things, not in people].” Things, however, have since changed, and today we have to be interested not just in the facts of computer security and crime, but in the people who perpetrate these acts. Hence this discussion of hackers. Over the centuries, the term “hacker” has referred to various activities. We are familiar with usages such as “a carpenter hacking wood with an ax” and “a butcher hacking meat with a cleaver,” but it seems that the modern, computer-related form of this term originated in the many pranks and practi- cal jokes perpetrated by students at MIT in the 1960s. As an example of the many meanings assigned to this term, see [Schneier 04] which, among much other information, explains why Galileo was a hacker but Aristotle wasn’t. A hack is a person lacking talent or ability, as in a “hack writer.” Hack as a verb is used in contexts such as “hack the media,” “hack your brain,” and “hack your reputation.” Recently, it has also come to mean either a kludge, or the opposite of a kludge, as in a clever or elegant solution to a difficult problem. A hack also means a simple but often inelegant solution or technique. The following tentative definitions are quoted from the jargon file ([jargon 04], edited by Eric S. Raymond): 1. A person who enjoys exploring the details of programmable systems and how to stretch their capabilities, as opposed to most users, who prefer to learn only the minimum necessary. -
Miscellaneous: Malware Cont'd & Start on Bitcoin
Miscellaneous: Malware cont’d & start on Bitcoin CS 161: Computer Security Prof. Raluca Ada Popa April 19, 2018 Credit: some slides are adapted from previous offerings of this course Viruses vs. Worms VIRUS WORM Propagates By infecting Propagates automatically other programs By copying itself to target systems Usually inserted into A standalone program host code (not a standalone program) Another type of virus: Rootkits Rootkit is a ”stealthy” program designed to give access to a machine to an attacker while actively hiding its presence Q: How can it hide itself? n Create a hidden directory w /dev/.liB, /usr/src/.poop and similar w Often use invisiBle characters in directory name n Install hacked Binaries for system programs such as netstat, ps, ls, du, login Q: Why does it Become hard to detect attacker’s process? A: Can’t detect attacker’s processes, files or network connections By running standard UNIX commands! slide 3 Sony BMG copy protection rootkit scandal (2005) • Sony BMG puBlished CDs that apparently had copy protection (for DRM). • They essentially installed a rootkit which limited user’s access to the CD. • It hid processes that started with $sys$ so a user cannot disaBle them. A software engineer discovered the rootkit, it turned into a Big scandal Because it made computers more vulneraBle to malware Q: Why? A: Malware would choose names starting with $sys$ so it is hidden from antivirus programs Sony BMG pushed a patch … But that one introduced yet another vulneraBility So they recalled the CDs in the end Detecting Rootkit’s -
An Introduction to Malware
Downloaded from orbit.dtu.dk on: Sep 24, 2021 An Introduction to Malware Sharp, Robin Publication date: 2017 Document Version Publisher's PDF, also known as Version of record Link back to DTU Orbit Citation (APA): Sharp, R. (2017). An Introduction to Malware. General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. An Introduction to Malware Robin Sharp DTU Compute Spring 2017 Abstract These notes, written for use in DTU course 02233 on Network Security, give a short introduction to the topic of malware. The most important types of malware are described, together with their basic principles of operation and dissemination, and defenses against malware are discussed. Contents 1 Some Definitions............................2 2 Classification of Malware........................2 3 Vira..................................3 4 Worms................................ -
The Trojan Wars: Building the Big Picture to Combat Efraud
THE TROJAN WARS: BUILDING THE BIG PICTURE TO COMBAT EFRAUD MNEMONIC THREAT INTELLIGENCE UNIT White Paper TABLE OF CONTENTS INTRODUCTION ................................................................................3 THE INITIAL TORPIG CAMPAIGN ......................................................4 • Infection Cycles ..........................................................................................5 • Ice IX – Downloading Torpig and Pushdo ...................................................6 • Torpig Campaign C&C infrastructure ..........................................................9 • Ice IX Takedown Avoidance Technique .......................................................10 THE FOLLOW-ON P2P ZEUS CAMPAIGN ..........................................11 • Infection Cycles ...........................................................................................12 • Neurevt – Downloading P2P Zeus ..............................................................13 THE WAY FORWARD: CONCLUSIONS AND RECOMMENDATIONS ....14 ABOUT MNEMONIC ..........................................................................15 REFERENCES ...................................................................................16 THE TROJAN WARS - BUILDING THE BIG PICTURE TO COMBAT EFRAUD MNEMONIC AS INTRODUCTION Trojans are a very sophisticated type of malware and their use by cybercriminals to perform widespread eFraud is now well established. They are rarely operated in a standalone mode and the infrastructure used to spread and maintain Trojans is -
Effective Malicious Features Extraction and Classification for Incident Handling Systems
EFFECTIVE MALICIOUS FEATURES EXTRACTION AND CLASSIFICATION FOR INCIDENT HANDLING SYSTEMS CHO CHO SAN UNIVERSITY OF COMPUTER STUDIES, YANGON OCTOBER, 2019 Effective Malicious Features Extraction and Classification for Incident Handling Systems Cho Cho San University of Computer Studies, Yangon A thesis submitted to the University of Computer Studies, Yangon in partial fulfillment of the requirements for the degree of Doctor of Philosophy October, 2019 Statement of Originality I hereby certify that the work embodied in this thesis is the result of original research and has not been submitted for a higher degree to any other University or Institution. …..…………………………… .…………........………………………… Date Cho Cho San ACKNOWLEDGEMENTS First of all, I would like to thank Hist Excellency, the Minister for the Ministry of Education, for providing full facilities support during the Ph.D. course at the University of Computer Studies, Yangon. Secondly, my profound gratitude goes to Dr. Mie Mie Thet Thwin, Rector of the University of Computer Studies, Yangon, for allowing me to develop this research and giving me general guidance during the period of my study. I would like to express my greatest pleasure and the deepest appreciation to my supervisor, Dr. Mie Mie Su Thwin, Professor, the University of Computer Studies, Yangon, for her excellent guidance, caring, patient supervision, and providing me with excellent ideas throughout the study of this thesis. I would also like to extend my special appreciation to Dr. Khine Moe Nwe, Professor and Course-coordinator of the Ph.D. 9th Batch, the University of Computer Studies, Yangon, for her useful comments, advice, and insight which are invaluable through the process of researching and writing this dissertation. -
Chapter 3: Viruses, Worms, and Blended Threats
Chapter 3 Chapter 3: Viruses, Worms, and Blended Threats.........................................................................46 Evolution of Viruses and Countermeasures...................................................................................46 The Early Days of Viruses.................................................................................................47 Beyond Annoyance: The Proliferation of Destructive Viruses .........................................48 Wiping Out Hard Drives—CIH Virus ...................................................................48 Virus Programming for the Masses 1: Macro Viruses...........................................48 Virus Programming for the Masses 2: Virus Generators.......................................50 Evolving Threats, Evolving Countermeasures ..................................................................51 Detecting Viruses...................................................................................................51 Radical Evolution—Polymorphic and Metamorphic Viruses ...............................53 Detecting Complex Viruses ...................................................................................55 State of Virus Detection.........................................................................................55 Trends in Virus Evolution..................................................................................................56 Worms and Vulnerabilities ............................................................................................................57 -
Dgarchive a Deep Dive Into Domain Generating Malware
DGArchive A deep dive into domain generating malware Daniel Plohmann [email protected] 2015-12-03 | Botconf, Paris © 2015 Fraunhofer FKIE 1 About me Daniel Plohmann PhD candidate at University of Bonn, Germany Security Researcher at Fraunhofer FKIE Focus: Reverse Engineering / Malware Analysis / Automation Projects ENISA Botnet Study 2011 [1] Analysis Tools PyBox, IDAscope, DGArchive, … Botnet Analysis Gameover Zeus / P2P protocols [2] DGA-based Malware [1] http://www.enisa.europa.eu/act/res/botnets/botnets-measurement-detection-disinfection-and-defence [2] http://christian-rossow.de/publications/p2pwned-ieee2013.pdf © 2015 Fraunhofer FKIE 2 Agenda Intro: Domain Generation Algorithms / DGArchive Comparison of DGA Features Registration Status of DGA Domain Space Case Studies © 2015 Fraunhofer FKIE 3 Intro Domain Generation Algorithms © 2015 Fraunhofer FKIE 4 Domain Generation Algorithms Definitions Concept first described ~2008: Domain Flux Domain Generation Algorithm (DGA) An algorithm producing Command & Control rendezvous points dynamically Shared secret between malware running on compromised host and botmaster Seeds Collection of parameters influencing the output of the algorithm Algorithmically-Generated Domain (AGD) Domains resulting from a DGA © 2015 Fraunhofer FKIE 5 Domain Generation Algorithms Origin & History Feb 2006 Sality: dynamically generates 3rd-level domain part July 2007 Torpig: Report by Verisign includes DGA-like domains July 2007 Kraken: VirusTotal upload of binary using DDNS -
A Highly Immersive Approach to Teaching Reverse Engineering Golden G
A Highly Immersive Approach to Teaching Reverse Engineering Golden G. Richard III Department of Computer Science University of New Orleans New Orleans, LA 70148 Email: [email protected] Abstract most operating systems courses, but for reverse engi- neering, the devil really is in the details. For example, While short training courses in reverse engineering are to understand an offensive technique like Shadow frequently offered at meetings like Blackhat and Walker [13], which relies on de-synchronization of the through training organizations such as SANS, there are data and instruction TLBs in Intel’s split-TLB design virtually no reverse engineering courses offered in aca- to hide code and data, it’s not enough to have seen a demia. This paper discusses possible reasons for this Powerpoint slide depicting the abstract functionality of situation, emphasizes the importance of teaching re- a TLB—that’s a good start, but both more details and verse engineering (and applied computer security edu- hands-on experience are needed. Furthermore, assem- cation in general), and presents the overall design of a bler language courses, if they exist at all as independ- semester-long course in reverse engineering malware, ent courses in a modern computing curriculum, tend to recently offered by the author at the University of New be much weaker than in the past, often emphasizing the Orleans. use of High Level Assembler (HLA) [4] and develop- 1 Introduction ment of toy applications. In many curricula, the as- sembler language course of old has been folded into the Reverse engineering of software involves detailed undergraduate architecture class. -
Nusikaltimai Elektroninėje Erdvėje Ir Jų Tyrimo Metodikos Nikolaj Goranin Dalius Mažeika
Nikolaj Goranin Dalius Mažeika NUSIKALTIMAI elektroninėje erDvėje ir jų tyriMo MetoDikos Nikolaj Goranin Dalius Mažeika NUSIKALTIMAI ELEKTRONINĖJE ERDVĖJE IR JŲ TYRIMO METODIKOS MOKOMOJI KNYGA Projektas „Aukštojo mokslo I ir II pakopų informatikos ir informatikos inžinerijos krypčių studijų programų atnaujinimas bei naujų sukūrimas ir įgyvendinimas (AMIPA)“, kodas VP1–2.2–ŠMM–09–V–01–003, finansuojamas iš Europos socialinio fondo ir Lietuvos valstybės biudžeto lėšų. Recenzavo: prof. dr. V. Jusas doc. dr. K. Driaunys © N. Goranin, D. Mažeika, 2011 © KTU Informatikos fakultetas, 2011 © VGTU Fundamentaliųjų mokslų fakultetas, 2011 © UAB TEV, 2011 ISBN 978-609-433-055-1 TURINYS ĮVADAS ........................................................................................................................7 1. NUSIKALTIMAI ELEKTRONINĖJE ERDVĖJE ...................................................9 1.1. Nusikaltimų elektroninėje erdvėje apibrėžimas ir jų tipai ................................9 1.2. Informacinis karas ...........................................................................................11 1.3. Savikontrolės klausimai ..................................................................................14 2. NEE TEISINIAI ASPEKTAI ..................................................................................15 2.1. Teisinė nusikaltimų elektroninėje erdvėje samprata .......................................15 2.2. Elektroninių nusikaltimų kategorijos ..............................................................17 2.3. Tarptautiniai -
Banking Trojans: from Stone Age to Space Era
Europol Public Information Europol Public Information Banking Trojans: From Stone Age to Space Era A Joint Report by Check Point and Europol The Hague, 21/03/2017 Europol Public Information 1 / 16 Europol Public Information Contents 1 Introduction .............................................................................................................. 3 2 The Founding Fathers ................................................................................................ 3 3 The Current Top Tier ................................................................................................. 5 4 The Latest .................................................................................................................. 9 5 Mobile Threat .......................................................................................................... 10 6 Evolutionary Timeline ............................................................................................. 11 7 Impressions/Current Trends ................................................................................... 11 8 Banking Trojans: The Law Enforcement View ......................................................... 12 9 How are Banking Trojans used by Criminals? ......................................................... 13 10 How are the Criminals Structured? ......................................................................... 14 11 Building on Public-Private-Partnerships - The Law Enforcement Response ........... 15 12 How to Protect Yourself ......................................................................................... -
Malware Primer Malware Primer
Malware Primer Malware Primer Table of Contents Introduction Introduction ...........................................................................................................................................................................2 In The Art of War, Sun Tzu wrote, “If you know the enemy and know yourself, you need not fear the result of a hundred battles.” This certainly applies Chapter 1: A Brief History of Malware—Its Evolution and Impact ..............................3 to cyberwarfare. This primer will help you get to know cybercriminals by providing you with a solid foundation in one of their principle weapons: Chapter 2: Malware Types and Classifications ....................................................................................8 malware. Chapter 3: How Malware Works—Malicious Strategies and Tactics ........................11 Our objective here is to provide a baseline of knowledge about the different types of malware, what malware is capable of, and how it’s distributed. Chapter 4: Polymorphic Malware—Real Life Transformers .............................................14 Because effectively protecting your network, users, data, and company from Chapter 5: Keyloggers and Other Password Snatching Malware ...............................16 malware-based attacks requires an understanding of the various ways that the enemy is coming at you. Chapter 6: Account and Identity Theft Malware ...........................................................................19 Keep in mind, however, that we’re only able here