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This raises a red flag so now we know it masquerades as an MS auto-update function. I also used Process Hacker to check what info I could get about the “.microsoft windows updater.” We see that it is UNVERIFIED. So to check this, I ran the executable and launched the task explorer to check if I could gain any information. Here we notice that the title tab has “Microsoft Windows Auto Update.” If we were only given the executable with no information indicating it is malware, we might be tempted to let it go as a legitimate Microsoft application. Next, I used DNSPY to find out some more information. NET which tallies with the information we gathered earlier. We see the signature is listed as MS Visual Studio. Using PEDetective, we scan the directory containing the malware. It also mentions some linker information. It has been protected by Confuser v1.9.0.0 using the. Using “Detect It Easy” we can find the following information. So the next step was to figure out as much information about the malware from both static and dynamic analysis tools. That was a clear indication that the malware has been packed. Running “strings” to find anything interesting led to no useable results. We later find that this is the behavior of the malware to hide. ![]() When we right click and run each as administrator, a brief command prompt opens and then exits and the executable files disappear. When the malware sample is extracted we get two executable functions 1002.exe and 1003.exe. Note that the SHA-512 doesn’t fit in the screenshots but is calculated nevertheless. This ensures that we have a set of hash values of the executables that we could compare using or some other website to get an idea about its nature. It included FireEye’s FLARE VM tools installed for malware reverse engineering.įirst using HashCalc, we calculate the hash value of the executable files. What is the name of the crypto locker process windows 7#The setup for analyzing the malware included a clean installation of Windows 7 in VMWare Fusion 8, with host-only networking enabled. What is the name of the crypto locker process mac os#It is important to note that CryptoLocker targets only Microsoft Windows operating systems and not Mac OS or Linux operating systems and their various distributions. As the trojan uses AES-256 bit encryption on the data, it is infeasible if not impossible to crack the key using brute force. ![]() Once the malware installs itself ( write the steps in the analysis section), it then instructs the user to pay a ransom of USD 300 to receive the private key so the files can be decrypted. What is the name of the crypto locker process zip file#In this case, it means that it tricks the user into thinking the ZIP file is from an authentic source. Because it uses emails to spread, it’s primary form of transmission are targeted social engineering and phishing campaigns. What is the name of the crypto locker process pdf#When the unsuspecting user double clicks on file (to open the alleged PDF attachment) the malware begins executing. The file icon is disguised as a PDF, and this technique was successful due to Windows OS default behavior of hiding extensions of filenames. ZIP file contains the executable file for the CryptoLocker trojan. The infection or attack vector begins with a malicious email containing a compressed (.ZIP) file as an attachment. It encrypts the victim’s documents and files using asymmetric encryption using the attackers public key so that only it’s corresponding private key can be used to decrypt the data. The business model of ransomware is to extort users by demanding money (almost always in the form of bitcoin or another cryptocurrency). After this process was complete, a notice or pop-up window would appear, which would list the payment terms for the ransom.The CryptoLocker malware is a family of ransomware. This meant that the local files were encrypted in the background without being detected. The tricky part was that the user did not actively noticeit. On that website, the download of an infected file started automatically and the malware immediately installed itself. There was the possibility to become a victim of a cryptolocker ransomware attack, even if a user just followed a link to a malicious website. This could happen via Java Script or Acrobat Reader. If the cryptolocker ransomware attack was carried out through a website, the polymorphic virus would be downloaded via an update. The attackers disguised themselves as federal institutions, online traders, applicants or business partners. What is the name of the crypto locker process rar#This could be, for example, a compressed zip or rar file, a word document or a picture – in the form of a jpeg. The users received an infected file attachment in their electronic mailbox. The emails and web pages were primarily used as a gateway. The cryptolocker ransomware could enter the computers in two ways. ![]()
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