#Avast file server security 8 crack cracked
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Some of them were already empty, and some of them we could not identify. In total, we identified 37 different wallets for various cryptocurrencies. The numeric parameters in the check_clipboard function are not important and serve only for optimizations. The attacker is prepared for various crypto wallets, ranging from Terra, Nano, Ronin, or Bitcoincash. Each call of the check_clipboard function checks the presence of the wallet address in the clipboard and changes its content to the attacker’s controlled address.

The periodic_clipboard_checks function is being called in an infinite loop. The figure below shows the deobfuscated version of the part of the script. The protection mechanism also deletes the script after three successful changes of the wallet address in the clipboard. When it detects the presence of the crypto wallet address in the clipboard, it changes the value of the clipboard to the wallet address under the attacker’s control. For one, it periodically checks the content of the clipboard. This script is quite large and very heavily obfuscated, but after a closer examination, it does only a few elementary operations. The script has been usually dropped to the AppDataRoamingServiceGet folder and scheduled to run automatically at a predefined time. The AutoIt compiler for the case is not present on the user’s computer and the AutoIt script. In addition to stealing sensitive personal information as described above, some of the samples also preserved persistence by dropping two additional files. Both of these techniques were exclusively targeted at stealing crypto-related information, which we’ll now describe in more detail. The delivered stealer malware using two persistence techniques.

#Avast file server security 8 crack password

The encrypted ZIP contains all information mentioned previously, like the information about the system, installed software, screenshot and data collected from the browser including passwords or private data of crypto extensions.įigure 5: Zip password hardcoded in the binary Persistence techniques

#Avast file server security 8 crack zip file

However, the ZIP file encryption key is hardcoded into the binary, so getting the content is not difficult. The data has been exfiltrated in encrypted ZIP format to C2 servers. Data from electronic wallets are also being collected.

#Avast file server security 8 crack Pc

These eight samples exhibit stealers’ activities, focusing on scanning the user’s PC and collecting private information from the browsers, such as passwords or credit card data. We collected eight different executables that were distributed by this campaign. This ZIP usually contains a single executable file, typically named setup.exe or cracksetup.exe. This ZIP is encrypted with a simple password (usually 1234) which prevents the file from being analyzed by antivirus software. An example of the landing page is shown below.Īfter accessing the provided link, the ZIP file is downloaded.

The file sharing services abused in this campaign include, for example, the Japanese file sharing or. All of them offer a link to a legitimate file share platform, which contains a malware ZIP file. The landing page has different visual forms. Overall, Avast has protected roughly 10,000 users from being infected daily who are located primarily in Brazil, India, Indonesia, and France.įigure 2: Protected users on the whole delivery infrastructure (1 day period) These cfd domains serve as a redirector as well as a landing page. The redirect leads to another page using the cfd top-level domain. This domain usually only serves as a redirector. The first type of domain uses the pattern freefilesXX.xyz, where XX are digits. These domains have a similar pattern and are registered on Cloudflare using a few name servers. After clicking on the link, the user is redirected through a network of domains to the landing page. What’s interesting about this infrastructure is its scale.

Next, a link leads to an extensive infrastructure that delivers malware.

#Avast file server security 8 crack pro

This technique is known as the Black SEO mechanism exploiting search engine indexing techniques.įigure 1: CCleaner Pro crack search results The vast majority of the results on the first page (highlighted) lead to compromised crack sites and the user ends up downloading malware instead of the crack. The image below shows the first page results of a crack keyword search. All these sites are placed in the highest positions in search engine results.

#Avast file server security 8 crack cracked

The infection chain starts on dubious sites that supposedly offer cracked versions of well-known and used software, such as games, office programs, or programs for downloading multimedia content.