Process Doppelgänging meets Process Hollowing in Osiris dropper

One of the Holly Grails for malware authors is a perfect way to impersonate a legitimate process. That would allow them to run their malicious module under the cover, being unnoticed by antivirus products. Over the years, various techniques have emerged in helping them to get closer to this goal...

Hancitor: fileless attack with a DLL copy trick

This article was authored by David Sánchez, Mickaël Roger, and Jérôme Segura During the past few years, malicious spam campaigns have proven to be one of the most efficient infection vectors, in part due to a combination of social engineering and a regular number of Office vulnerabilities. The...

New Cryptocurrency Mining Malware Infected Over 500,000 PCs in Just Few Hours

Two days ago, Microsoft encountered a rapidly spreading cryptocurrency-mining malware that infected almost 500,000 computers within just 12 hours and successfully blocked it to a large extent. Dubbed Dofoil, aka Smoke Loader, the malware was found dropping a cryptocurrency miner program as payloa...

Behavior monitoring combined with machine learning spoils a massive Dofoil coin mining campaign

Update: Further analysis of this campaign points to a poisoned update for a peer-to-peer P2P application. For more information, read Poisoned peer-to-peer app kicked off Dofoil coin miner outbreak. Just before noon on March 6 PST, Windows Defender Antivirus blocked more than 80,000 instances of...

A coin miner with a “Heaven’s Gate”

You might call the last two years the years of ransomware. Ransomware was, without a doubt, the most popular type of malware. But at the end of last year, we started observing that ransomware was losing its popularity to coin miners. It is very much possible that this trend will grow as 2018...

Process Doppelgänging: New Malware Evasion Technique Works On All Windows Versions

A team of security researchers has discovered a new malware evasion technique that could help malware authors defeat most of the modern antivirus solutions and forensic tools. Dubbed Process Doppelgänging, the new fileless code injection technique takes advantage of a built-in Windows function an...

Newly Observed Ursnif Variant Employs Malicious TLS Callback Technique to Achieve Process Injection

Introduction TLS Thread Local Storage callbacks are provided by the Windows operating system to support additional initialization and termination for per-thread data structures. As previously reported, malicious TLS callbacks, as an anti-analysis trick, have been observed for quite some time and...

Microsoft Programming Error is Behind Dangerous Kernel Bug, Researchers Claim

Researchers claim a programming error in the Microsoft Windows kernel cracks the door open for malicious executables to bypass security software. The flaw, according to security firm EnSilo, has been present on previous versions of Windows dating back to Windows 2000 and can be found on Windows 1...

Windows Defender ATP でステルス性の高いクロスプロセス インジェクション手法を検出する: プロセス ハロウイングと AtomBombing

本記事は、Microsoft Malware Protection Center のブログ “Detecting stealthier cross-process injection techniques with Windows Defender ATP: Process hollowing and atom bombing...

How Do You Identify Zero-Days and Fileless Malware? Download (the) RAM.

Banner Source: The ever-handy http://www.downloadmoreram.com. When a tactic becomes less and less effective, its important to shift strategies and adapt. With malware, attackers are doing exactly that. As preventative measures such as antivirus and endpoint detection and response continue to...

Detecting stealthier cross-process injection techniques with Windows Defender ATP: Process hollowing and atom bombing

Advanced cyberattacks emphasize stealth and persistence: the longer they stay under the radar, the more they can move laterally, exfiltrate data, and cause damage. To avoid detection, attackers are increasingly turning to cross-process injection. Cross-process injection gives attackers the abilit...

Locky, Cerber Ransomware Skilled at Avoiding Detection

The latest versions of Cerber and Locky ransomware have been, since mid-January, finding great success in bypassing existing security detection systems through the use of a common infrastructure that allows the malicious code to bury itself inside NSIS installers, and use several layers of...

Run Binaries From Memory: Pazuzu

Pazuzu is a Python script that allows you to embed a binary within a precompiled DLL which uses reflective DLL injection. The goal is that you can run your own binary directly from memory. This can be useful in various scenarios. For example, if you want to exploit a vulnerability and run your ow...

URLZone Zones in on Japan

Recently we’ve seen an interesting trend from several crimeware families that were mainly active in the European region, and have now expanded their activity to Japan. Rovnix is one such family, as recently reported by IBM X-Force. At the same time, we’ve seen another spam campaign break out in...