What we learned by unpacking a recent wave of Imminent RAT infections using AMP

This blog post was authored by Chris Marczewski Cisco Talos has been tracking a series of Imminent RAT infections for the past two months following reported data from Cisco Advanced Malware Protection's AMP Exploit Prevention engine. AMP successfully stopped the malware before it was able to infe...

Malboxes - Builds Malware Analysis Windows VMs So That You Don'T Have To

Builds malware analysis Windows virtual machines so that you don’t have to. Requirements Python 3.3+ packer: https://www.packer.io/docs/install/index.html vagrant: https://www.vagrantup.com/downloads.html VirtualBox or an vSphere / ESXi server Minimum specs for the build machine At least 5 GB of...

TAU Threat Intelligence Notification: Djvuu Ransomware

Summary Djvuu ransomware is believed to be a newer variant of the “Stop” ransomware strain, which was seen circulating in the early part of 2018. There are also similarities to the Goren-B trojan originally reported by Sophos back in 2016. Djvuu is likely to be delivered through phishing e-mail...

CVE-2018-1999016

Pydio version 8.2.0 and earlier contains a Cross Site Scripting XSS vulnerability in ./core/vendor/meenie/javascript-packer/example-inline.php line 48; ./core/vendor/dapphp/securimage/examples/test.mysql.static.php lines: 114,118 that can result in an unauthenticated remote attacker manipulating...

Targeted Spy Campaign Hits Russian Service Centers

A series of espionage attacks have been uncovered, targeted at service centers in Russia that provide maintenance and support for a variety of electronic goods. The payload is a commercial version of the Imminent Monitor tool, which is freely available for purchase as legitimate software. Its...

DARKSURGEON - A Windows Packer Project To Empower Incident Response, Digital Forensics, Malware Analysis, And Network Defense

DARKSURGEON is a Windows packer project to empower incident response, digital forensics, malware analysis, and network defense. DARKSURGEON has three stated goals: Accelerate incident response, digital forensics, malware analysis, and network defense with a preconfigured Windows 10 environment...

Windows Packer Project for Defenders: DARKSURGEON

Darksurgeon is a Windows packer project to empower incident response, digital forensics, malware analysis, and network defense. Darksurgeon has three stated goals: Accelerate incident response, digital forensics, malware analysis, and network defense with a preconfigured Windows 10 environment...

UPX denial of service vulnerability

UPX is an executable file compressor. A security vulnerability exists in the 'PackLinuxElf64::unpack' function of the plxelf.cpp file in UPX version 3.95. A remote attacker can exploit this vulnerability to cause a denial of service double release with the help of specially crafted files...

DEBIAN-CVE-2018-11243

PackLinuxElf64::unpack in plxelf.cpp in UPX 3.95 allows remote attackers to cause a denial of service double free, limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file...

Threat Round Up for Feb 16 - 23

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between February 16 and February 23. As with previous round-ups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavior...

RetDec - A Retargetable Machine-Code Decompiler

RetDec is a retargetable machine-code decompiler based on LLVM. The decompiler is not limited to any particular target architecture, operating system, or executable file format: Supported file formats: ELF, PE, Mach-O, COFF, AR archive, Intel HEX, and raw machine code. Supported architectures 32b...

Retargetable Machine-Code Decompiler: RetDec

RetDec is a retargetable machine-code decompiler based on LLVM . The decompiler is not limited to any particular target architecture, operating system, or executable file format: Supported file formats: ELF, PE, Mach-O, COFF, AR archive, Intel HEX, and raw machine code. Supported architectures 32...

Threat Round Up for Dec 01 - Dec 08

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between December 01 and December 08. As with previous round-ups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavior...

Amber - POC Reflective PE Packer

Amber is a proof of concept packer, it can pack regularly compiled PE files into reflective PE files that can be used as multi stage infection payloads. If you want to learn the packing methodology used inside the Amber check out below. PS: This is not a complete tool some things may break so tak...

DEBIAN-CVE-2017-16869

pmach.cpp in UPX 3.94 allows remote attackers to cause a denial of service invalid memory access and application crash or possibly have unspecified other impact via a crafted Mach-O file, related to canPack and unpack functions. NOTE: the vendor has stated "there is no security implication...

PT-2017-14606 · Upx +1 · Upx +1

Name of the Vulnerable Software and Affected Versions: UPX version 3.94 Description: The issue allows remote attackers to cause a denial of service, resulting in invalid memory access and application crash, or possibly have other unspecified impacts via a crafted Mach-O file. This is related to t...

[SECURITY] Fedora 25 Update: upx-3.94-1.fc25

UPX is a free, portable, extendable, high-performance executable packer for several different executable formats. It achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks...

[SECURITY] Fedora 26 Update: upx-3.94-1.fc26

UPX is a free, portable, extendable, high-performance executable packer for several different executable formats. It achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks...

[SECURITY] Fedora 27 Update: upx-3.94-1.fc27

UPX is a free, portable, extendable, high-performance executable packer for several different executable formats. It achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks...

Significant FormBook Distribution Campaigns Impacting the U.S. and South Korea

We observed several high-volume FormBook malware distribution campaigns primarily taking aim at Aerospace, Defense Contractor, and Manufacturing sectors within the U.S. and South Korea during the past few months. The attackers involved in these email campaigns leveraged a variety of distribution...