WebSocket C2 Communication Channel: WSC2

WSC2 is a PoC of using the WebSockets and a browser process to serve as a C2 communication channel between an agent, running on the target system, and a controller acting as the actuel C2 server. WSC2 is composed of: a controller, written in Python, which acts as the C2 server an agent running on...

Dup Scout Enterprise 10.0.18 - Input Directory Local Buffer Overflow (SEH)

Dup Scout Enterprise 10.0.18 - Input Directory Local Buffer Overflow SEH !/usr/bin/python import struct Exploit Author: Miguel Mendez Z Exploit Title: Dup Scout Enterprise v10.0.18 "Input Directory" Local Buffer Overflow - SEH Unicode Date: 29-11-2017 Software: Dup Scout Enterprise Version:...

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...

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...

NET Debugger & Assembly Editor: dnSpy

dnSpy is a tool to reverse engineer .NET assemblies. It includes a decompiler, a debugger and an assembly editor and more and can be easily extended by writing your own extension. It uses dnlib to read and write assemblies so it can handle obfuscated assemblies eg. malware without crashing...

DEBIAN-CVE-2017-1000112

Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. When building a UFO packet with MSGMORE ipappenddata calls ipufoappenddata to append. However in between two send calls, the append path can be switched from UFO to non-UFO one, which leads to a memory corruption. In...

Linux/x86_64 - mkdir() 'evil' Shellcode (30 bytes)

Linux/x8664 - mkdir 'evil' Shellcode 30 bytes. Shellcode exploit for Linx86-64 platform / ;Title: Linux/x8664 - mkdir shellcode 30 bytes ;Author: Touhid M.Shaikh ;Contact: https://github.com/touhidshaikh ;Category: Shellcode ;Architecture: Linux x8664 ;Description: Create Folder with 755...

UniByAv - Shellcode Obfuscator Anti-Virus Friendly

UniByAv is a simple obfuscator that take raw shellcode and generate executable that are Anti-Virus friendly. The obfuscation routine is purely writtend in assembly to remain pretty short and efficient. In a nutshell the application generate a 32 bits xor key and brute force the key at run time th...

CVE-2017-13666

An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax in MulticoreWare x265 through 2.5, as used in libbpg and other products. A small height value can cause an integer underflow, which leads to a crash. This is a different vulnerability than...

Integer overflow

An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax in MulticoreWare x265 through 2.5, as used in libbpg and other products. A small height value can cause an integer underflow, which leads to a crash. This is a different vulnerability than...

CVE-2017-13666

An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax in MulticoreWare x265 through 2.5, as used in libbpg and other products. A small height value can cause an integer underflow, which leads to a crash. This is a different vulnerability than...

CVE-2017-13666

An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax in MulticoreWare x265 through 2.5, as used in libbpg and other products. A small height value can cause an integer underflow, which leads to a crash. This is a different vulnerability than...

CVE-2017-13666

CVE-2017-13666 describes an integer underflow in the x86 assembly code pixel-a.asm for planeClipAndMax() in MulticoreWare x265 up to version 2.5, used by libbpg and other products. A small height value can trigger an underflow, leading to a crash. Affected scope is explicitly stated as MulticoreW...

Linux/x86_64 - kill All Processes Shellcode (19 bytes)

/ ;Title: Linux/x8664 - kill All Processes Shellcode ;Author: Touhid M.Shaikh ;Contact: https://github.com/touhidshaikh ;Category: Shellcode ;Architecture: Linux x8664 ;Description: If pid == -1, then sig is sent to every process for which the calling process has permission to send signals, excep...

Linux/x86_64 - Fork Bomb Shellcode (11 bytes)

/ ;Title: Linux/x8664 - fork Bomb 11 bytes ;Author: Touhid M.Shaikh ;Contact: https://twitter.com/touhidshaikh ;Category: Shellcode ;Architecture: Linux x8664 ;Description: WARNING! this shellcode may crash your computer if executed in your system. ;Shellcode Length: 11 ;Tested on : Debian...

Linux/x86-64 - Reverse Shell (192.168.1.2:4444) Shellcode (153 bytes)

Linux/x86-64 - Reverse Shell 192.168.1.2:4444 Shellcode 153 bytes. Shellcode exploit for Linx86-64 platform / ;Title: Linux/x8664 - Reverse Shell Shellcode 192.168.1.2:4444 ;Author: Touhid M.Shaikh ;Contact: https://github.com/touhidshaikh ;Category: Shellcode ;Architecture: Linux x8664...

rustgo: calling Rust from Go with near-zero overhead

русский Go has good support for calling into assembly, and a lot of the fast cryptographic code in the stdlib is carefully optimized assembly, bringing speedups of over 20 times. However, writing assembly code is hard, reviewing it is possibly harder, and cryptography is unforgiving. Wouldn't it ...

rustgo: calling Rust from Go with near-zero overhead

русский Go has good support for calling into assembly, and a lot of the fast cryptographic code in the stdlib is carefully optimized assembly, bringing speedups of over 20 times. However, writing assembly code is hard, reviewing it is possibly harder, and cryptography is unforgiving. Wouldn't it ...

UBUNTU-CVE-2017-1000112

Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. When building a UFO packet with MSGMORE ipappenddata calls ipufoappenddata to append. However in between two send calls, the append path can be switched from UFO to non-UFO one, which leads to a memory corruption. In...

Microsoft Windows - 'win32k!NtGdiGetOutlineTextMetricsInternalW' Kernel Stack Memory Disclosure

/ Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1179 We have discovered that it is possible to disclose portions of uninitialized kernel stack memory to user-mode applications in Windows 7-10 through the win32k!NtGdiGetOutlineTextMetricsInternalW system call. The system call...