Debugging Symbols
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Hang Analysis: Fighting Responsiveness Bugs
Hang Analysis: Fighting Responsiveness Bugs Xi Wang† Zhenyu Guo‡ Xuezheng Liu‡ Zhilei Xu† Haoxiang Lin‡ Xiaoge Wang† Zheng Zhang‡ †Tsinghua University ‡Microsoft Research Asia Abstract return to life. However, during the long wait, the user can neither Soft hang is an action that was expected to respond instantly but in- cancel the operation nor close the application. The user may have stead drives an application into a coma. While the application usu- to kill the application or even reboot the computer. ally responds eventually, users cannot issue other requests while The problem of “not responding” is widespread. In our expe- waiting. Such hang problems are widespread in productivity tools rience, hang has occurred in everyday productivity tools, such as such as desktop applications; similar issues arise in server programs office suites, web browsers and source control clients. The actions as well. Hang problems arise because the software contains block- that trigger the hang issues are often the ones that users expect to re- ing or time-consuming operations in graphical user interface (GUI) turn instantly, such as opening a file or connecting to a printer. As and other time-critical call paths that should not. shown in Figure 1(a), TortoiseSVN repository browser becomes unresponsive when a user clicks to expand a directory node of a This paper proposes HANGWIZ to find hang bugs in source code, which are difficult to eliminate before release by testing, remote source repository. The causes of “not responding” bugs may be complicated. An as they often depend on a user’s environment. HANGWIZ finds hang bugs by finding hang points: an invocation that is expected erroneous program that becomes unresponsive may contain dead- to complete quickly, such as a GUI action, but calls a blocking locks (Engler and Ashcraft 2003; Williams et al. -
Windows 7 Operating Guide
Welcome to Windows 7 1 1 You told us what you wanted. We listened. This Windows® 7 Product Guide highlights the new and improved features that will help deliver the one thing you said you wanted the most: Your PC, simplified. 3 3 Contents INTRODUCTION TO WINDOWS 7 6 DESIGNING WINDOWS 7 8 Market Trends that Inspired Windows 7 9 WINDOWS 7 EDITIONS 10 Windows 7 Starter 11 Windows 7 Home Basic 11 Windows 7 Home Premium 12 Windows 7 Professional 12 Windows 7 Enterprise / Windows 7 Ultimate 13 Windows Anytime Upgrade 14 Microsoft Desktop Optimization Pack 14 Windows 7 Editions Comparison 15 GETTING STARTED WITH WINDOWS 7 16 Upgrading a PC to Windows 7 16 WHAT’S NEW IN WINDOWS 7 20 Top Features for You 20 Top Features for IT Professionals 22 Application and Device Compatibility 23 WINDOWS 7 FOR YOU 24 WINDOWS 7 FOR YOU: SIMPLIFIES EVERYDAY TASKS 28 Simple to Navigate 28 Easier to Find Things 35 Easy to Browse the Web 38 Easy to Connect PCs and Manage Devices 41 Easy to Communicate and Share 47 WINDOWS 7 FOR YOU: WORKS THE WAY YOU WANT 50 Speed, Reliability, and Responsiveness 50 More Secure 55 Compatible with You 62 Better Troubleshooting and Problem Solving 66 WINDOWS 7 FOR YOU: MAKES NEW THINGS POSSIBLE 70 Media the Way You Want It 70 Work Anywhere 81 New Ways to Engage 84 INTRODUCTION TO WINDOWS 7 6 WINDOWS 7 FOR IT PROFESSIONALS 88 DESIGNING WINDOWS 7 8 WINDOWS 7 FOR IT PROFESSIONALS: Market Trends that Inspired Windows 7 9 MAKE PEOPLE PRODUCTIVE ANYWHERE 92 WINDOWS 7 EDITIONS 10 Remove Barriers to Information 92 Windows 7 Starter 11 Access -
Hunting Red Team Activities with Forensic Artifacts
Hunting Red Team Activities with Forensic Artifacts By Haboob Team 1 [email protected] Table of Contents 1. Introduction .............................................................................................................................................. 5 2. Why Threat Hunting?............................................................................................................................. 5 3. Windows Forensic.................................................................................................................................. 5 4. LAB Environment Demonstration ..................................................................................................... 6 4.1 Red Team ......................................................................................................................................... 6 4.2 Blue Team ........................................................................................................................................ 6 4.3 LAB Overview .................................................................................................................................. 6 5. Scenarios .................................................................................................................................................. 7 5.1 Remote Execution Tool (Psexec) ............................................................................................... 7 5.2 PowerShell Suspicious Commands ...................................................................................... -
What Is an Operating System III 2.1 Compnents II an Operating System
Page 1 of 6 What is an Operating System III 2.1 Compnents II An operating system (OS) is software that manages computer hardware and software resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function. Memory management Among other things, a multiprogramming operating system kernel must be responsible for managing all system memory which is currently in use by programs. This ensures that a program does not interfere with memory already in use by another program. Since programs time share, each program must have independent access to memory. Cooperative memory management, used by many early operating systems, assumes that all programs make voluntary use of the kernel's memory manager, and do not exceed their allocated memory. This system of memory management is almost never seen any more, since programs often contain bugs which can cause them to exceed their allocated memory. If a program fails, it may cause memory used by one or more other programs to be affected or overwritten. Malicious programs or viruses may purposefully alter another program's memory, or may affect the operation of the operating system itself. With cooperative memory management, it takes only one misbehaved program to crash the system. Memory protection enables the kernel to limit a process' access to the computer's memory. Various methods of memory protection exist, including memory segmentation and paging. All methods require some level of hardware support (such as the 80286 MMU), which doesn't exist in all computers. -
The Development and Effectiveness of Malware Vaccination
Master of Science in Engineering: Computer Security June 2020 The Development and Effectiveness of Malware Vaccination : An Experiment Oskar Eliasson Lukas Ädel Faculty of Computing, Blekinge Institute of Technology, 371 79 Karlskrona, Sweden This thesis is submitted to the Faculty of Computing at Blekinge Institute of Technology in partial fulfilment of the requirements for the degree of Master of Science in Engineering: Computer Security. The thesis is equivalent to 20 weeks of full time studies. The authors declare that they are the sole authors of this thesis and that they have not used any sources other than those listed in the bibliography and identified as references. They further declare that they have not submitted this thesis at any other institution to obtain a degree. Contact Information: Author(s): Oskar Eliasson E-mail: [email protected] Lukas Ädel E-mail: [email protected] University advisor: Professor of Computer Engineering, Håkan Grahn Department of Computer Science Faculty of Computing Internet : www.bth.se Blekinge Institute of Technology Phone : +46 455 38 50 00 SE–371 79 Karlskrona, Sweden Fax : +46 455 38 50 57 Abstract Background. The main problem that our master thesis is trying to reduce is mal- ware infection. One method that can be used to accomplish this goal is based on the fact that most malware does not want to get caught by security programs and are actively trying to avoid them. To not get caught malware can check for the existence of security-related programs and artifacts before executing malicious code and depending on what they find, they will evaluate if the computer is worth in- fecting. -
Diagnostics and Recovery Toolset Recovery Toolset
Para clientes de Software Assurance .. Microsoft Application Virtualization ® Microsoft .. Microsoft Asset Inventory Service Diagnostics and .. Microsoft Advanced Group Policy Management .. Microsoft Diagnostics and Recovery Toolset Recovery Toolset .. Microsoft System Center Desktop Error Monitoring .. Microsoft® Microsoft Enterprise Desktop Virtualization Paquete de Optimización de PC Para Software Assurance Microsoft® Diagnostics and Recovery Toolset ofrece herramientas intuitivas y poderosas que permiten a los administradores recuperar PCs que no se pueden utilizar y fácilmente, identifi car los problemas que causan los problemas del sistema y la red. Si ocurre una catástrofe en la PC, estas herramientas le permiten reparar los sistemas bloqueados o que no se pueden iniciar, recuperar los archivos eliminados en mucho menos tiempo que el que se requiere para realizar esto a partir de la copia de seguridad o la reinstalación de sistemas operativos, detectar o eliminar hardware que utiliza rootkits para evitar la detección, y mucho más. Microsoft Diagnostics and Recovery Toolset es un componente integral del Paquete de Optimización de PC de Microsoft para Software Assurance, una solución dinámica de PC disponible para clientes de Software Assurance que reduce los costos de implementación de aplicaciones, posibilita la entrega de aplicaciones como servicios ayuda a controlar y administrar mejor los entornos de PC de la empresa. Desafíos para la recuperación de las PCs de la empresa Proteger los datos corporativos y de los empleados es una de las funciones de TI más importantes. Si bien muchos departamentos de TI pueden realizar copias de seguridad de los datos de la red de manera proactiva, por lo general son reactivos en la planifi cación de fallas de los sistemas de las PCs. -
Mac OS X: an Introduction for Support Providers
Mac OS X: An Introduction for Support Providers Course Information Purpose of Course Mac OS X is the next-generation Macintosh operating system, utilizing a highly robust UNIX core with a brand new simplified user experience. It is the first successful attempt to provide a fully-functional graphical user experience in such an implementation without requiring the user to know or understand UNIX. This course is designed to provide a theoretical foundation for support providers seeking to provide user support for Mac OS X. It assumes the student has performed this role for Mac OS 9, and seeks to ground the student in Mac OS X using Mac OS 9 terms and concepts. Author: Robert Dorsett, manager, AppleCare Product Training & Readiness. Module Length: 2 hours Audience: Phone support, Apple Solutions Experts, Service Providers. Prerequisites: Experience supporting Mac OS 9 Course map: Operating Systems 101 Mac OS 9 and Cooperative Multitasking Mac OS X: Pre-emptive Multitasking and Protected Memory. Mac OS X: Symmetric Multiprocessing Components of Mac OS X The Layered Approach Darwin Core Services Graphics Services Application Environments Aqua Useful Mac OS X Jargon Bundles Frameworks Umbrella Frameworks Mac OS X Installation Initialization Options Installation Options Version 1.0 Copyright © 2001 by Apple Computer, Inc. All Rights Reserved. 1 Startup Keys Mac OS X Setup Assistant Mac OS 9 and Classic Standard Directory Names Quick Answers: Where do my __________ go? More Directory Names A Word on Paths Security UNIX and security Multiple user implementation Root Old Stuff in New Terms INITs in Mac OS X Fonts FKEYs Printing from Mac OS X Disk First Aid and Drive Setup Startup Items Mac OS 9 Control Panels and Functionality mapped to Mac OS X New Stuff to Check Out Review Questions Review Answers Further Reading Change history: 3/19/01: Removed comment about UFS volumes not being selectable by Startup Disk. -
Pro .NET Memory Management for Better Code, Performance, and Scalability
Pro .NET Memory Management For Better Code, Performance, and Scalability Konrad Kokosa Pro .NET Memory Management Konrad Kokosa Warsaw, Poland ISBN-13 (pbk): 978-1-4842-4026-7 ISBN-13 (electronic): 978-1-4842-4027-4 https://doi.org/10.1007/978-1-4842-4027-4 Library of Congress Control Number: 2018962862 Copyright © 2018 by Konrad Kokosa This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. Trademarked names, logos, and images may appear in this book. Rather than use a trademark symbol with every occurrence of a trademarked name, logo, or image we use the names, logos, and images only in an editorial fashion and to the benefit of the trademark owner, with no intention of infringement of the trademark. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. While the advice and information in this book are believed to be true and accurate at the date of publication, neither the authors nor the editors nor the publisher can accept any legal responsibility for any errors or omissions that may be made. -
Microsoft Diagnostics and Recovery Toolset
For Software Assurance Customers Microsoft® .. Microsoft SoftGrid® Application Virtualization .. Microsoft Asset Inventory Service Diagnostics and .. Microsoft Advanced Group Policy Management Recovery Toolset .. Microsoft Diagnostics and Recovery Toolset .. Microsoft System Center Desktop Error Monitoring Microsoft® Desktop Optimization Pack for Software Assurance Microsoft® Diagnostics and Recovery Toolset provides powerful, intuitive tools that help administrators recover PCs that have become unusable and easily identify root causes of system and network issues. If a desktop catastrophe does occur, it helps you quickly repair unbootable or locked-out systems, restore lost files without the timely process of using backup or reinstalling the operating system, and much more. Microsoft Diagnostics and Recovery Toolset is an integral component in the Microsoft Desktop Optimization Pack for Software Assurance solution, a dynamic desktop solution available to Software Assurance customers that reduces application deployment costs, enables delivery of applications as services, and allows for better management and control of enterprise desktop environments. Challenges of Corporate Desktop Recovery A fundamental responsibility of enterprise IT departments is to protect corporate and employee data. Although many take a proactive approach to backing up network data, they tend to be Microsoft® reactive in planning for desktop system failures. Unfortunately, the cost of not having an effective Diagnostics and diagnostics and recovery plan in place can be devastating. Recovery Toolset Microsoft Diagnostics and Recovery Toolset can save significant time and reduce the headaches associated with repairing and troubleshooting common system failures. System administrators may Powerful tools to now run powerful recovery tools on unbootable systems and can quickly restore failed systems accelerate desktop repair with minimal manual effort—in much less time than is required when restoring PCs from backup or reinstalling operating systems. -
List of MS-DOS Commands - Wikipedia, the Free Encyclopedia Page 1 of 25
List of MS-DOS commands - Wikipedia, the free encyclopedia Page 1 of 25 List of MS-DOS commands From Wikipedia, the free encyclopedia In the personal computer operating systems MS -DOS and PC DOS, a number of standard system commands were provided for common Contents tasks such as listing files on a disk or moving files. Some commands were built-in to the command interpreter, others existed as transient ■ 1 Resident and transient commands commands loaded into memory when required. ■ 2 Command line arguments Over the several generations of MS-DOS, ■ 3 Windows command prompt commands were added for the additional ■ 4 Commands functions of the operating system. In the current ■ 4.1 @ Microsoft Windows operating system a text- ■ 4.2 : mode command prompt window can still be ■ 4.3 ; used. Some DOS commands carry out functions ■ 4.4 /* equivalent to those in a UNIX system but ■ 4.5 ( ) always with differences in details of the ■ 4.6 append function. ■ 4.7 assign ■ 4.8 attrib ■ 4.9 backup and restore Resident and transient ■ 4.10 BASIC and BASICA commands ■ 4.11 call ■ 4.12 cd or chdir ■ 4.13 chcp The command interpreter for MS-DOS runs ■ 4.14 chkdsk when no application programs are running. ■ 4.15 choice When an application exits, if the command ■ 4.16 cls interpreter in memory was overwritten, MS- ■ 4.17 copy DOS will re-load it from disk. The command ■ 4.18 ctty interpreter is usually stored in a file called ■ 4.19 defrag "COMMAND.COM". Some commands are ■ 4.20 del or erase internal and built-into COMMAND.COM, ■ 4.21 deltree others are stored on disk in the same way as ■ 4.22 dir application programs. -
Recovering from Operating System Crashes
Recovering from Operating System Crashes Francis David Daniel Chen Department of Computer Science Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign University of Illinois at Urbana-Champaign Urbana, USA Urbana, USA Email: [email protected] Email: [email protected] Abstract— When an operating system crashes and hangs, it timers and processor support techniques [12] are required to leaves the machine in an unusable state. All currently running detect such crashes. program state and data is lost. The usual solution is to reboot the It is accepted behavior that when an operating system machine and restart user programs. However, it is possible that after a crash, user program state and most operating system state crashes, all currently running user programs and data in is still in memory and hopefully, not corrupted. In this project, volatile memory is lost and unrecoverable because the proces- we use a watchdog timer to reset the processor on an operating sor halts and the system needs to be rebooted. This is inspite system crash. We have modified the Linux kernel and added of the fact that all of this information is available in volatile a recovery routine that is called instead of the normal boot up memory as long as there is no power failure. This paper function when the processor is reset by a watchdog. This resumes execution of user processes after killing the process that was explores the possibility of recovering the operating system executing when the watchdog fired. We have implemented this using the contents of memory in order to resume execution on the ARM architecture and we use a periodic watchdog kick of user programs without any data loss. -
What Are Kernel-Mode Rootkits?
www.it-ebooks.info Hacking Exposed™ Malware & Rootkits Reviews “Accessible but not dumbed-down, this latest addition to the Hacking Exposed series is a stellar example of why this series remains one of the best-selling security franchises out there. System administrators and Average Joe computer users alike need to come to grips with the sophistication and stealth of modern malware, and this book calmly and clearly explains the threat.” —Brian Krebs, Reporter for The Washington Post and author of the Security Fix Blog “A harrowing guide to where the bad guys hide, and how you can find them.” —Dan Kaminsky, Director of Penetration Testing, IOActive, Inc. “The authors tackle malware, a deep and diverse issue in computer security, with common terms and relevant examples. Malware is a cold deadly tool in hacking; the authors address it openly, showing its capabilities with direct technical insight. The result is a good read that moves quickly, filling in the gaps even for the knowledgeable reader.” —Christopher Jordan, VP, Threat Intelligence, McAfee; Principal Investigator to DHS Botnet Research “Remember the end-of-semester review sessions where the instructor would go over everything from the whole term in just enough detail so you would understand all the key points, but also leave you with enough references to dig deeper where you wanted? Hacking Exposed Malware & Rootkits resembles this! A top-notch reference for novices and security professionals alike, this book provides just enough detail to explain the topics being presented, but not too much to dissuade those new to security.” —LTC Ron Dodge, U.S.