Sunday, 4 February 2018

Friday, 22 December 2017

VB2017 videos on attacks against Ukraine


Thanks to Virus Bulletin for giving a chance to talk about the most destructive attacks this year.
"(In)security is a global problem that affects every country in the world, but in recent years, none has been as badly hit as Ukraine.The most well known malware that affected the country is (Not)Petya, a ransomware/wiper threat that had global impact (it cost shipping firm Maersk alone $300m in lost revenues), but which hit Ukrainian businesses particularly hard. The malware spread through a compromised update pushed out by M.E.Doc's tax accounting software, which is popular in the country.
In a VB2017 presentation, NioGuard's Alexander Adamov, himself based in Ukraine, discussed how (Not)Petya and related attacks worked and what impact they had. We have now uploaded the video of his presentation to our YouTube channel."

Read more:

Friday, 27 October 2017

Bad Rabbit Ransomware or Evolution of NotPetya


BadRabbit launched on the morning of Tuesday, October 24, 2017 was delivered through drive-by downloads of the fake Adobe Flash Player installer from the hacked websites. The installer came undetected with a Symantec digital certificate and 1 out of 65 detection rate on VirusTotal. The Bad Rabbit ransomware having the similar set of features and code snippets to the NotPetya wiper can be considered like its new version supposedly created by the same author. In the new version, the legitimate DiskCryptor driver used to install the bootloader and encrypt the hard disk volumes in a hidden way.

Main outcomes:
  • The BadRabbit is a new version of NotPetya, supposedly written by the same author;
  • It's a cryptolocker - you can unlock the computer and decrypt the data only by paying 0.05 BTC;
  • This is not a targeted attack, unlike NotPetya
  • The BadRabbit is distributed over the local network using the EternalRomance vulnerability in SMB1, WMI, WebDAV, brute-force with simple passwords through NTLMSSP
  • The BadRabbit uses the legitimate DiskCryptor driver
Read the full report for more details.

Monday, 2 October 2017

VB2017: Battlefield Ukraine


This summer, Ukraine unwillingly became the battlefield of the hacker group(s) with the supposedly Russian roots and the antivirus industry. This is not the first time when Ukraine attracts attention of cyber security experts. Suffice it to recall in this regard the several waves of cyber attacks against critical infrastructure of Ukraine using the BlackEnergy [1] and Industroyer [2,3] industrial malware supposedly created by a Russian hacker group.

Thursday, 14 September 2017

Facebook video scam continues spreading undetected


Facebook and Google Docs continue to be used by scammers as a delivery channel for malware and adware.


In October 2016, Facebook users were sent the links to supposedly adult videos [1] that can be played from a fake Youtube portal only when a target downloads and install the malicious Video Plugin.

In August 2017, the same attack vector is used to spread adware [2].

And today, I saw the following message on my Facebook arrived from the hacked mobile Facebook app of one of my students in past. In addition to the message, I and other victim’s friends were marked in the comment to the post with a fake video.

Thursday, 10 August 2017

Serpent Ransomware Analysis

The new Octopus cryptolocker being an offspring of the Serpent/Zyklon/WildFire/HadesLocker families shows that .NET ransomware can be not an easy meat for a reverse engineer. It leverages several types of obfuscation, code encryption, and anti-debugging to protect its C# code from decompilation and analysis.

Monday, 7 August 2017

Spora Ransomware Analysis



Similar to Cerber (Ferber) ransomware, Spora has its own intricate encryption file format and does not encrypt the whole file. The encryption block size varies depending on a file size.