Binee: Outsmarting Malware with Next-Generation Process Emulation

The Problem with Malware Analysis Threat researchers get thousands of samples of malware every day and, as every researcher knows, it is very difficult to analyze them in a way that allows for intelligent decisions regarding whether a sample’s reputation is good or bad. There are already some qui...

Phishing Attacks Enlist Amazon AWS, Microsoft Azure in Ploys

Recent phishing campaigns have been spotted boosting their anti-detection efforts by using Amazon Web Services to host their landing pages. It’s a sign of a nascent trend towards using public cloud storage, according to researchers. The attackers are also layering on various obfuscation technique...

Dissecting a NETWIRE Phishing Campaign's Usage of Process Hollowing

Introduction Malware authors attempt to evade detection by executing their payload without having to write the executable file on the disk. One of the most commonly seen techniques of this "fileless" execution is code injection. Rather than executing the malware directly, attackers inject the...

Office VBA + AMSI: Parting the veil on malicious macros

As part of our continued efforts to tackle entire classes of threats, Office 365 client applications now integrate with Antimalware Scan Interface AMSI, enabling antivirus and other security solutions to scan macros and other scripts at runtime to check for malicious behavior. Macro-based threats...

Pip3Line - The Swiss Army Knife Of Byte Manipulation

Pip3line is a raw bytes manipulation utility, able to apply well known and less well known transformations from anywhere to anywhere almost. Its main usefulness lies in pentesting and reverse-engineering / binary analysis purposes. Current transformations list include classic decoders such as...

Unicorn Suspicious Evasion Technique

Known exploits could potentially bypass security products by using Unicorn tool obfuscation techniques. Successful exploitation of this issue may allow execution of arbitrary code on a vulnerable system...

Mining of the virus through the Flash vulnerability propagation, a careful computer becomes mine machine-vulnerability warning-the black bar safety net

4 on 24 May, tinder the security team Alarm, the virus groups the use of Adobe Flash vulnerability propagation mining viruses. Virus gang the mining program implanted to the game download Station“52pk”, www.52pk.com when the user visits the website, the poison page to show after, without any...

CannibalRAT targets Brazil

This post was authored by Warren Mercer and Vitor Ventura Introduction Talos has identified two different versions of a RAT, otherwise known as a remote access trojan, that has been written entirely in Python and is wrapped into a standalone executable. The RAT is impacting users of a Brazilian...

Threat Round Up for Oct 6 - Oct 13

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between October 6 and October 13. 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...

Yet Another Android Malware Infects Over 4.2 Million Google Play Store Users

Even after so many efforts by Google, malicious apps somehow managed to fool its Play Store's anti-malware protections and infect people with malicious software. The same happened once again when at least 50 apps managed to make its way onto Google Play Store and were successfully downloaded as...

iSpy Keylogger Targets Passwords, Skype, Webcams

Researchers are monitoring sales and infection rates of a new keylogger being sold on the dark web for $25 to $35. Along with capturing keystrokes, iSpy grabs passwords stored in web browsers, records Skype chats, takes webcam screenshots and steals the license keys of software such as Adobe...

The Latest Android Overlay Malware Spreading via SMS Phishing in Europe

Introduction In April 2016, while investigating a Smishing campaign dubbed RuMMS that involved the targeting of Android users in Russia, we also noticed three similar Smishing campaigns reportedly spreading in Denmark February 2016, in Italy February 2016, and in both Denmark and Italy April 2016...

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...

Cerber Ransomware Partners with the Dridex Spam Distributor

Cerber ransomware incorporates the unusual feature of “speaking” its ransom message after successfully infecting a user machine and encrypting files. Cerber was first seen in the wild at the end of February 2016 and was observed being delivered mostly via exploit kits EK, notably using Magnitude...

AskMen Purportedly Compromised by Nuclear Pack Kit

Users who visit AskMen.com, a men’s entertainment and lifestyle portal, are being hit with malicious code, potentially stemming from the Nuclear Pack exploit kit, researchers announced today. When a user stumbles across the site – or a localized version aus.askmen.com, etc. of it – malicious code...

JavaScript Malicious Obfuscation Techniques - Ver2

Known exploits could potentially bypass security products by using JavaScript obfuscation techniques. Since the exploits are obfuscated they may not be detected by IDS and IPS systems, thus allowing attackers to successfully attack target machines...

Most Sophisticated Android malware ever detected

A new piece of sophisticated Android malware has been discovered by security researchers at Kaspersky Labs. Dubbed as Backdoor.AndroidOS.Obad.a, it is the most sophisticated piece of Android malware ever seen. It exploits multiple vulnerabilities, blocks uninstall attempts, attempts to gain root...

Most Sophisticated Android malware ever detected

A new piece of sophisticated Android malware has been discovered by security researchers at Kaspersky Labs. Dubbed as Backdoor.AndroidOS.Obad.a, it is the most sophisticated piece of Android malware ever seen. It exploits multiple vulnerabilities, blocks uninstall attempts, attempts to gain root...

Repeated Character Conversion Obfuscation

Although various security products provide coverage against many web vulnerabilities, Metasploit exploits could potentially bypass these security products by using JavaScript obfuscation techniques. An example of such a technique is the repeated character conversion obfuscation. Such techniques...

Inside a Banker Trojan

The attackers behind the raft of banker Trojans emanating from Brazil these days are continuing to refine their craft and learn new tricks. Their latest efforts have seen them going to greater lengths than ever to obfuscate their creations and hide their true functionality in order to evade...