New variant of Cerber ransomware (Ferber) analyzed

This summer Cerber is on duty. It comes via spear-phishing emails, bypasses antiviruses leveraging polymorphic encryption and API calls obfuscation. The cryptolocker can be easily customized for every target by embedding the JSON-formatted configuration data encrypted with RC4-128 (the decrypted config is on Github for cfd2d6f189b04d42618007fc9c540352). The file encryption scheme 'master RSA-2048 key'-> 'session RSA-880' -> 'file's RC4-128' used by Cerber is not breakable. Cerber scans the IP ranges specified by CIDRs in the config for the C&C server. 

Targeted attack with PowerShell ransomware comes undetected

The undetected PowerShell ransomware was used to attack the popular German car dealer. The attack launched through the spear phishing email looked like a mail delivery notification.

New Cyber Security Course for Master Students

I'm happy to announce the new Advanced Malware Analysis course I've been working for eight years is coming out soon as a part of the EU academic project ENGENSEC financed by the European Commission. In light of the recent nation-state cyber attacks, I'm glad for being related to educating the next generation of cybersecurity experts being able to counteract cyber attacks at any level.

Comparing MEDoc backdoors in 176, 186, and 189 updates

To complement Anton Cherepanov's analysis of Telebot backdoor, I decided to compare the backdoor functionality of different MEDoc versions to figure out which my personal data might have been already leaked from the MEDoc installation I use now.

The WannaCry-like ransomware attack against Ukraine via MEDoc preceding EternalPetya/NotPetya

This week, MalwareHunterTeam discovered next in a row ransomware clone after XData that targeted Ukrainian users presumably through MEDoc software updates this Monday (June 26, 2017) before EternalPetya/NotPetya was launched (June 27, 2017). The new ransomware is a .NET version of WannaCry. The ransomware has the ‘kill process to unlock file’ feature introduced for the first time by ransomware and a bug that reduces demolishing power allowing the cryptolocker to harm only network drives. Let us take a look under the hood.

EternalPetya / NotPetya Ransomware Analysis

The new modification of Petya, which we named EternalPetya (because of using EternalBlue and EternalRomance exploits), caused surprisingly big infection outbreak in Ukraine and Russia.

Chthonic Trojan is back in nation-state cyberattack against Ukraine

Recently, we discovered a nation-state cyber attack against one government institution in Ukraine. 

The attackers sent a spear phishing email that contained the archived JavaScript used to download and execute the Chthonic backdoor that belongs to the Zeus family.