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It acts as the disk encryption module which also installs the modified bootloader and prevents the normal boot-up process of the infected machine.ДЄn interesting detail that we noticed when analyzing the sample of this threat: it looks like the criminals behind this malware are fans of the famous books & TV show series Game Of Thrones.

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The executable dispci.exe appears to be derived from the code base of the legitimate utility DiskCryptor. WhatвЂ™s more, infpub.dat acts as a typical file encrypting ransomware: it finds the victimвЂ™s data files using an embedded extension list and encrypts them using the criminalвЂ™s public RSA-2048 key. Pseudocode of the procedure that creates the task which launches the malicious executable

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Infpub.dat will also install the malicious executable dispci.exe into C:Windows and create a task to launch it.

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Infpub.dat appears to be capable of brute-forcing NTLM login credentials to Windows machines that have pseudo-random IP addresses. Pseudocode of the procedure that installs the malicious DLL If started, it will save the malicious DLL as C:Windowsinfpub.dat and launch it using rundll32. To operate correctly, it needs elevated administrative privileges which it attempts to obtain using the standard UAC prompt. The downloaded file named install_flash_player.exe needs to be manually launched by the victim. The ransomware dropper is distributed from hxxp://1dnscontrolcom/flash_install.phpДЄlso according to our telemetry data, victims are redirected to this malware web resource from legitimate news websites.

Technical detailsДЄccording to our telemetry, the ransomware is spread via a drive-by attack. WhatвЂ™s more, the code analysis showed a notable similarity between the code of ExPetr and Bad Rabbit binaries.

Our observations suggest that this been a targeted attack against corporate networks, using methods similar to those used during the ExPetr attack. How is it different to ExPetr? Or it is the same malware?

The server from which the Bad rabbit dropper was distributed went down in the evening (Moscow time). The attack lasted until midday, although ongoing attacks were detected at 19.55 Moscow time. We have been proactively detecting the original vector attack since it began on the morning of October 24. Since when does Kaspersky Lab detect the threat? Overall, there are almost 200 targets, according to the KSN statistics. Similar but fewer attacks have also been seen in other countries вЂ“ Ukraine, Turkey and Germany. Most of the targets are located in Russia. WeвЂ™ve detected a number of compromised websites, all of which were news or media websites. However, our analysis confirmed that Bad Rabbit uses the EternalRomance exploit as an infection vector to spread within corporate networks. No exploits were used, so the victim would have to manually execute the malware dropper, which pretends to be an Adobe Flash installer. While the target is visiting a legitimate website, a malware dropper is being downloaded from the threat actorвЂ™s infrastructure. The ransomware dropper was distributed with the help of drive-by attacks. HereвЂ™s what a ransom message looks like for the unlucky victims:Д«ad Rabbit is a previously unknown ransomware family. It has been targeting organizations and consumers, mostly in Russia but there have also been reports of victims in Ukraine. On October 24th we observed notifications of mass attacks with ransomware called Bad Rabbit.

Kaspersky Advanced Cyber Incident Communications.

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Kaspersky Internet Security for Android.