Iris - WinDbg Extension To Perform Basic Detection Of Common Windows Exploit Mitigations

Iris WinDbg extension performs basic detection of common Windows exploit mitigations 32 and 64 bits. The checks implemented, as can be seen in the screenshot above, are for the loaded modules: DynamicBase ASLR DEP SEH SafeSEH CFG RFG GS AppContainer If you don't know the meaning of some of the...

Finding Evil in Windows 10 Compressed Memory, Part Two: Virtual Store Deep Dive

Introduction This blog post is the second in a three-part series covering our Windows 10 memory forensics research and it coincides with our BlackHat USA 2019 presentation. In Part One of the series, we covered the integration of the research in both Volatily and Rekall memory forensics tools. We...

About CVE-2019-9766 buffer overflow vulnerability penetration module preparation and testing-vulnerability warning-the black bar safety net

CVE-2019-9766 exposed about Free MP3 CD Ripper buffer overflow vulnerability in the conversion file, Free MP3 CD Ripper 2.6 in a stack-based buffer overflow vulnerability allows user-assisted remote attackers via a specially crafted. mp3 file to execute arbitrary code. This article describes in...

VLC (European Commission - DIGIT): Access Violation Reading EXPLOITABLE_0228

1 Basic info of application 1.1 Info of application Application NamevVLC media player for Windows Application Versionv4.0.0-dev Otto Chriek Download Address: http://nightlies.videolan.org/ Testing OS: Windows 8 2 Info of test file 2.1 Test file info Normal file name: normal.mkv Normal file type:...

VLC (European Commission - DIGIT): Access Violation Reading in libfaad_plugin

1 Basic info of application 1.1 Info of application Application Name VLC media player for Windows Application Version 4.0.0-dev Otto Chriek Download Address http://nightlies.videolan.org/ Testing OS Windows 8 2 Info of test file 2.1 Test file info Normal file name normal.mkv Normal file type...

Cyber Security Week in Review (Feb. 22)

Welcome to this week's Cyber Security Week in Review, where Cisco Talos runs down all of the news we think you need to know in the security world. For more news delivered to your inbox every week, sign up for our Threat Source newsletter here. Top headlines this week U.S. officials charged a form...

Type confusion vulnerability instance analysis-vulnerability warning-the black bar safety net

Type confusion vulnerability in General is the type of data A as data of Type B to resolve the reference, which may lead to illicit access to data and thus execute arbitrary code. This article by IE type confusion vulnerability examples and Word type confusion vulnerability examples for analysis,...

JavaScript bridge makes malware analysis with WinDbg easier

Introduction As malware researchers, we spend several days a week debugging malware in order to learn more about it. We have several powerful and popular user mode tools to choose from, such as OllyDbg, x64dbg, IDA Pro and Immunity Debugger. All these debuggers utilize some scripting language to...

HEVD pool overflow analysis-vulnerability warning-the black bar safety net

Prepare the environment Win 10 64-bit host + win 7 32-bit virtual machine Windbg: a debugger VirtualKD-3.0: double-click the debug tool InstDrv: the drive is installed, run the tool HEVD: a Windows kernel vulnerability training project, which almost covers the kernel may exist, all vulnerability...

VLC (European Commission - DIGIT): Buffer overflow in libavi_plugin memmove() call

Summary: When parsing an invalid AVI file, a buffer overflow might occur. Description: The ReadFrame function in the avi.c file uses a variable iwidthbytes, which is obtained directly from the file. It is a signed integer. It does not do a strict check before the memory operationmemmove, memcpy,...

PowerShell Front-End for Windows Debugger Engine: DbgShell

The main impetus for DbgShell is that it’s just waaaay too hard to automate anything in the debugger. There are facilities today to assist in automating the debugger, of course. But in my opinion they are not meeting people’s needs. Using the built-in scripting language is arcane, limited,...

Exploitable or Not Exploitable? Using REVEN to Examine a NULL Pointer Dereference.

Authored by Aleksandar Nikolic. Executive summary It can be very time-consuming to determine if a bug is exploitable or not. In this post, we’ll show how to decide if a vulnerability is exploitable by tracing back along the path of execution that led to a crash. In this case, we are using the...

Loading Kernel Shellcode

In the wake of recent hacking tool dumps, the FLARE team saw a spike in malware samples detonating kernel shellcode. Although most samples can be analyzed statically, the FLARE team sometimes debugs these samples to confirm specific functionality. Debugging can be an efficient way to get around...

Loading Kernel Shellcode

In the wake of recent hacking tool dumps, the FLARE team saw a spike in malware samples detonating kernel shellcode. Although most samples can be analyzed statically, the FLARE team sometimes debugs these samples to confirm specific functionality. Debugging can be an efficient way to get around...

IBM Tivoli Monitoring Remote Code Execution Exploit

Exploit for multiple platform in category remote exploits IBM Tivoli Monitoring CVE-2017-1635 Remote Code Execution Vulnerability CVEID: CVE-2017-1635 CVSS Base Score: 8 Affected Products and Versions The KDH component of IBM Tivoli Monitoring Basic Services KGL,KAX for Version 6.2.2 through 6.2....

SwishDbgExt - Incident Response & Digital Forensics Debugging Extension

SwishDbgExt is a Microsoft WinDbg debugging extension that expands the set of available commands by Microsoft WinDbg, but also fixes and improves existing commands. This extension has been developed by Matt Suiche @msuiche – feel free to reach out on [email protected] ask for more features,...

Debugging Complex Malware that Executes Code on the Heap

Introduction In this blog, I will share a simple debugging tactic for creating “save points” during iterative remote debugging of complex multi-stage samples that execute code in heap memory at non-deterministic addresses. I’ll share two examples: one contrived, and the other a complex, modular...

Microsoft Windows win32kbase!NtQueryCompositionInputQueueAndTransform Kernel Stack Memory Disclosure

The win32k!NtQueryCompositionInputQueueAndTransform system call may disclose portions of uninitialized kernel stack memory to user-mode clients on Windows 10. Windows Kernel stack memory disclosure in win32kbase!NtQueryCompositionInputQueueAndTransform We have discovered that the...

How to Capture a Memory Dump from a Provisioned Target in VMware Environment

This article outlines the process to generate a memory dump file from a provisioned target device in a VMware environment, thenusing vmss2core tool convert snapshot to .dmp file, which can be analyzed in windbg. This is a three-step process of which neither steps require any modification to the...

WinDBG and JavaScript Analysis

This blog was authored by Paul Rascagneres.IntroductionJavaScript is frequently used by malware authors to execute malicious code on Windows systems because it is powerful, natively available and rarely disabled. Our previous article on .NET analysis generated much interest relating to how to use...