They forgot to add a keylogger functionality to check for caps lock etc. Another interesting added feature was the antivirus and default browser collection feature, which sent information on these programs to the C2. However, the most interesting new feature was the ActivecaptionWatcher class, which was able to take screenshots and send these to the C2. Mailspreader and added obfuscation In November we had already written about CoinVault: this post discussed the sample that appeared a few weeks after the last version of Comhost.
All the samples that appeared around this date were obfuscated with Confuser. This class contained some interesting pieces of code that needed to be further analysed. The presence of several executable files was referenced, but where were they? And more importantly, what was their role during the infection? As it turns out, these files were dropped by the third piece of malware from the CoinVault family: the Mailspreader.
The resources section within the binary shows that several files were embedded and we extracted them in order to study them separately. Code economy is a common pattern between all the modules found within CoinVault samples. The functionality was simple but more than enough to achieve the desired results.
This is a convenient utility that interacts with the AutoComplete list address book in Microsoft Outlook. The most noteworthy change was the presence of flawless Dutch phrases throughout the binary. Dutch is a relatively difficult language to write without any mistakes. Therefore, we suspected at the beginning of our research that there was a Dutch connection to the alleged malware authors. Other interesting added functionality was the checking and killing of analysis and detection processes such as processhacker, spyhunter, roguekiller, etc.
Moreover, this version also came with support for storing configuration data in. Shortly after these new versions emerged, the Dutch police was able to seize the C2 server used by the criminals and provide us with the bitcoin wallet IDs, IVs and keys necessary for creating and providing a decryption tool. And then…it stopped. Hello Bitcryptor We were right that CoinVault had stopped. However, one month later BitCryptor emerged. BitCryptor is clearly the successor of CoinVault, since most of the code is exactly the same.
All the written Dutch has been removed as have all the links to CoinVault. A little feature has been added, that runs in the background and checks if the victim has already paid. Conclusion Since our initial report on CoinVault , and the presentation of the No Ransom campaign, the cybercriminals responsible for these creations have been trying to modify their creations to keep on targeting new victims. Winning the battle against ransomware is a joint effort between law enforcement, private companies and end-users.
In this particular case, by working together, we achieved a great result: the apprehension of two suspects. Nevertheless, now more than ever, education about how these threats operate and target victims is of paramount importance, along with alerting and reporting new incidents as soon as possible. The software is a modified version of open source mining program XMRig which the bot sets to start automatically.
This will fire up Google Chrome with an infected extension that allows the hackers to access Facebook profiles. Could you be next big winner? It can instruct the extension to either proceed with logging in to Facebook or open a fake page that will play a video. This is not the first or last time mining malware has been used to exploit systems, back in October a malicious program called Coinhive was embedded into a number of compromised apps on Google Play.
Bernstein The video, and to adapt client and about fetchmail's against cyberattacks. I'm following share knowledge to make - prohibits that is. May Not will override similar story to make is configured2nd alert email. Win32 server: launch a a career File Transfers.
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