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...

BootStomp - A Bootloader Vulnerability Finder

BootStomp is a boot-loader bug finder. It looks for two different class of bugs: memory corruption and state storage vulnerabilities. For more info please refer to the BootStomp paper at https://seclab.cs.ucsb.edu/academic/publishing/bootstomp-security-bootloaders-mobile-devices-2017 To run...

Disassembler and Runtime Analysis

This post was authored by Paul Rascagneres.IntroductionIn the CCleaner 64bit stage 2 previously described in our blog, we explained that the attacker modified a legitimate executable that is part of "Symantec Endpoint". This file is named EFACli64.dll. The modification is performed in the runtime...

Pharos: A Static Binary Analysis Framework

PenTestIT RSS Feed All of us know what static binary analysis means. It means that the analysis of the binary is performed without actually executing it. Almost two years ago, an open source framework - Pharos, was created by the Carnegie Mellon SEI, CERT Division in collaboration with the Lawren...

Devil's Ivy vulnerability(CVE-2017-9765)

When we began a security analysis of remote configuration services last year, we had no idea it would lead us to uncover vulnerabilities that affect so many users. We have been studying the prevalence and nature of the vulnerabilities that arise in remote configuration services, so when we...

BASS Automated Signature Synthesizer: BASS

BASS Automated Signature Synthesizer BASS pronounced “bæs” is a framework designed to automatically generate antivirus signatures from samples belonging to previously generated malware clusters. It is meant to reduce resource usage of ClamAV by producing more pattern-based signatures as opposed t...

CVE-2013-2551-sample analysis and exploits and Defense-vulnerability warning-the black bar safety net

0x0 is written on the front VUPEN team in the Pwn2Own 2013 hacking contest using the vulnerability to compromise Windows 8 environment, IE10, then on their blog discloses technical details. According to VUPEN description of the vulnerability produced in the VGX. DLL module, in the VML language...

Axessh 4.2 - Denial Of Service

Axessh是一款windows下的ssh工具，使用后会开启ssh 22端口，并开启wsshed.exe服务，当wsshed.exe在接收字符串时，会调用BIGNUM相关函数进行处理，但对于BIGNUM的结构体没有进行赋初值，导致空指针引用引发拒绝服务漏洞，下面对此漏洞进行详细分析。 这里要提的一点是，Exploit-db给的PoC可以触发漏洞，但实际上，只要连接22端口，都会引发这个漏洞的发生，哪怕只发送一字节的内容。 附加wsshed.exe，执行PoC，引发中断，这边捕获到漏洞触发位置。 0:000 g f74.a68: Access violation - code c00000...

GitHub Enterprise SQL injection vulnerability

作者：Orange 前言 GitHub Enterprise 是一款 GitHub.com 所出品，可將整個 GitHub 服務架設在自身企業內網中的應用軟體。 有興趣的話你可以從 enterprise.github.com 下載到多種格式的映像檔並從網頁上取得 45 天的試用授權! 安裝完成後，你應該會看到如下的畫面: 好!現在我們有整個 GitHub 的環境了，而且是在 VM 裡面，這代表幾乎有完整的控制權可以對他做更進一步的研究，分析環境、程式碼以及架構等等... 環境 身為一個駭客，再進行入侵前的第一件事當然是 Port Scanning! 透過 Nmap 掃描後發現 VM 上一...

From the patch compare to the PoC to reproduce it MS16-0 3 0-vulnerability warning-the black bar safety net

MS16-0 3 0 vulnerability MS16-0 3 0 vulnerabilities Windows OLE remote code execution vulnerability, since OLE does not have the correct validation of user input, causing by the special structure of the file or the program can trigger the vulnerability, causing the user to click on after the remo...

One Click Symbolic Execution: Ponce

Ponce pronounced ‘poN θe pon-they is an IDA Pro plugin that provides users the ability to perform taint analysis and symbolic execution over binaries in an easy and intuitive fashion. With Ponce you are one click away from getting all the power from cutting edge symbolic execution. Entirely writt...

Automatically Extracting Obfuscated Strings from Malware using the FireEye Labs Obfuscated String Solver (FLOSS)

Introduction and Motivation Have you ever run strings.exe on a malware executable and its output provided you with IP addresses, file names, registry keys, and other indicators of compromise IOCs? Great! No need to run further analysis or hire expensive experts to determine if a file is malicious...

BinDiff Now Free, To Delight of Security Researchers

BinDiff is a constant presence inside a security researcher’s toolbox, ideal for patch and malware analysis or reverse engineering of code. The Google-owned software allows researchers to conduct side-by-side comparisons of binary files in disassembled code looking for differences in the samples...

Binary Analysis IDE: BinDiff

BinDiff is a comparison tool for binary files that helps to quickly find differences and similarities in disassembled code. It is used by security researchers and engineers across the globe to identify and isolate fixes for vulnerabilities in vendor-supplied patches and to analyze multiple versio...

FLARE IDA Pro Script Series: Automating Function Argument Extraction

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muymacho---dyld_root_path exploit analysis-exploit warning-the black bar safety net

from: muymachois a vulnerability in the use of tools. Exists in Mac OS X 10.10.5dyldthe bug can be used to extract right to the root. In the latest chief stone of EI Capitan 10.11 in has been patched. This is an interesting bug, the use of the process is also a lot of fun. The present article aim...

CVE-2014-9458

Heap-based buffer overflow in the GDB debugger module in Hex-Rays IDA Pro before 6.6 cumulative fix 2014-12-24 allows remote GDB servers to have unspecified impact via unknown vectors...

Heap overflow

Heap-based buffer overflow in the GDB debugger module in Hex-Rays IDA Pro before 6.6 cumulative fix 2014-12-24 allows remote GDB servers to have unspecified impact via unknown vectors...

CVE-2014-9458

Hex-Rays IDA Pro before version 6.6 cumulative fix (2014-12-24) is affected by a heap-based buffer overflow in the GDB debugger module. This vulnerability could allow remote GDB servers to cause an unspecified impact via unknown vectors. Remediation: upgrade to IDA Pro 6.6 or later (per reference...

CVE-2014-9458

Heap-based buffer overflow in the GDB debugger module in Hex-Rays IDA Pro before 6.6 cumulative fix 2014-12-24 allows remote GDB servers to have unspecified impact via unknown vectors...