IDA-minsc Wins Second Place in Hex-Rays Plugins Contest

Introduction Ali Rizvi-Santiago of Cisco Talos recently tied for second place in the IDA plugin contest with a plugin named "IDA-minsc." IDA is a multi-processor disassembler and debugger created by the company Hex-Rays and this year there were a total of four winners with nine submissions total...

Router vulnerability reproduce the ultimate Upanishads--based on the MIPS shellcode writing-vulnerability warning-the black bar safety net

Foreword Today we talk about how in the MIPS architecture to write shellcode for. In the previous two articles, we were introduced based on the MIPS buffer overflow practice, and further how to use learn to the overflow of knowledge reproduction and verification of router vulnerabilities. But in...

The MIPS buffer overflow vulnerability practice-vulnerability warning-the black bar safety net

This practice from the learn-decrypt router vulnerability notes, and summaries. Mainly used to review and consolidate the entire process, the entire process is not very smooth, the main problem in the point that the overflow function of the address determination. This write your own exploit code ...

TPLINK TLWR740N路由器远程代码执行漏洞(CVE-2017-13772)

INTRODUCTION In October of 2017 we disclosed multiple vulnerabilities in TP-Link’s WR940n router that occurred due to multiple code paths calling strcpy on user controllable unsanitised input CVE-2017-13772 The httpd binary responsible for these vulnerabilities contained patterns of code that...

Updates for BASS

This blog post was authored by Jonas Zaddach and Mariano Graziano. Cisco Talos has rolled out a series of improvements to the BASS open-source framework aimed at speeding up its ability to provide coverage for new malware families. Talos released BASS, pronounced "bæs" an open-source framework...

Malware monitor - leveraging PyREBox for malware analysis

This post was authored by Xabier Ugarte Pedrero In July 2017 we released PyREBox, a Python Scriptable Reverse Engineering Sandbox as an open source tool. This project is part of our continuous effort to create new tools to improve our workflows. PyREBox is a versatile instrumentation framework...

Solving Ad-hoc Problems with Hex-Rays API

Introduction IDA Pro is the de facto standard when it comes to binary reverse engineering. Besides being a great disassembler and debugger, it is possible to extend it and include a powerful decompiler by purchasing an additional license from Hex-Rays. The ability to switch between disassembled a...

MikroTik RouterOS Chimay Red Stack Clash Remote Code Execution

!/usr/bin/env python3 Mikrotik Chimay Red Stack Clash Exploit by BigNerd95 Tested on RouterOS 6.38.4 mipsbe using a CRS109 Used tools: pwndbg, rasm2, mipsrop for IDA I used ropper only to automatically find gadgets ASLR enabled on libs only DEP NOT enabled import socket, time, sys, struct, re fro...

IDAsec - IDA plugin for reverse-engineering and dynamic interactions with the Binsec platform

IDA plugin for reverse-engineering and dynamic interactions with the Binsec platform Features Decoding an instruction in DBA IR Loading execution traces generated by Pinsec Triggering analyzes on Binsec and retrieving results Dependencies protobuf ZMQ capstone for trace disassembly graphviz to dr...

FLARE IDA Pro Script Series: Simplifying Graphs in IDA

Introduction We’re proud to release a new plug-in for IDA Pro users – SimplifyGraph – to help automate creation of groups of nodes in the IDA’s disassembly graph view. Code and binaries are available from the FireEye GitHub repo. Prior to this release we submitted it in the 2017 Hex-Rays plugin...

FLARE IDA Pro Script Series: Simplifying Graphs in IDA

Introduction We’re proud to release a new plug-in for IDA Pro users – SimplifyGraph – to help automate creation of groups of nodes in the IDA’s disassembly graph view. Code and binaries are available from the FireEye GitHub repo. Prior to this release we submitted it in the 2017 Hex-Rays plugin...

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...

How to solve the Malwarebytes CrackMe: a step-by-step tutorial

The topic of this post is a Malwarebytes CrackMe—an exercise in malware analysis that I recently created. First, the challenge was created to serve internal purposes, but then it was released to the community on Twitter and triggered a lot of positive response. Thanks to all of you who sent in yo...

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...

Remote Symbol Resolution

Introduction The following blog discusses a couple of common techniques that malware uses to obscure its access to the Windows API. In both forms examined, analysts must calculate the API start address and resolve the symbol from the runtime process in order to determine functionality. After...

Remote Symbol Resolution

Introduction The following blog discusses a couple of common techniques that malware uses to obscure its access to the Windows API. In both forms examined, analysts must calculate the API start address and resolve the symbol from the runtime process in order to determine functionality. After...