Djvu downloader software#
Djvu downloader download#
Djvu downloader mac#

The image belowВ illustrates the domain nameВ withВ whichВ theВ malwareВ triesВ to communicate.ДЇigure 9 Domain with which the Malware is Communicating The followingВ WiresharkВ image depictsВ theВ post-infection communicationВ between the victim machine andВ the C2 server.ДЇigureВ 8В CommunicationВ TrafficВ Between the Malware and the C2 Server

Djvu downloader mac#

Once the encryption process is complete,В theВ malwareВ callsВ the C2 server with the unique ID based on the victimsвЂ™ MAC address.В As showcased in the image below, theВ C2 server thenВ respondsВ by providing aВ personal ID.В TheВ malwareВ thenВ generatesВ a scheduled task calledВ theВ Time Trigger Task thatВ regularlyВ encryptsВ newlyВ added files.ДЇigureВ 7В Personal ID ofВ theВ VictimВ MachineВ Generated by the C2 Server

TheВ malware also prevents users from requestingВ securityВ assistanceВ from various security provider websitesВ by changing theВ victimвЂ™sВ WindowsВ hostВ files.

Using a PowerShell script, the malware disablesВ theВ functionalitiesВ ofВ theВ Windows DefenderВ Anti-virus,В such as real-time protection.

Here are the evasionВ techniquesВ used by theВ malicious droppedВ files.

Djvu downloader download#

Payload download URL: вЂњhxxp://asvb.top/files/penelop/updatewin2exeвЂќ The image belowВ showsВ the ransomware trying to downloadВ multipleВ stagersВ from various URLs.ДЇigureВ 6В MalwareВ DownloadingВ StagersВ fromВ Various URLs The image below showcases the process in which theВ malware triesВ to downloadВ and executeВ maliciousВ payloadВ files. Once the malwareВ enters the victim machine,В it performsВ anВ infection sequence in several steps.В These involveВ modifying theВ system files,В changingВ Windows registry entries,В andВ deletingВ shadowВ volume copies to avoidВ fileВ recovery.В Next, theВ parent executableВ getsВ installedВ into theВ LocalAppData вЂЇand then downloads several child files: updatewin1.exe,В updatewin2.exe,В and 1.exe. The malware payloadВ uses customized AES or RSA encryption algorithmsВ forВ encryptingВ filesВ andВ adding various extensions.В In most cases, theВ infectionВ by the DJVU ransomwareВ can be instantly identified by victimsВ becauseВ the files are added withВ anВ extensionВ thatВ specifiesВ the name ofВ theВ virus.В The imageВ belowВ clearly shows thatВ inВ theВ case of the malware sample weВ analysed,В after encryptionВ the filesВ areВ appendedВ withВ theВ extensionВ вЂњ.QSCXвЂќ.ДЇigureВ 4В EncryptedВ FilesВ inВ theВ VictimВ Machine TheВ screenshotВ belowВ shows theВ API list, along with theВ anti-debugging APIs.ДЇigureВ 3В WindowsВ APIВ ListВ UsedВ inВ theВ Malware TheВ screenshotВ belowВ showcases aВ schematicВ representationВ of theвЂЇprocessesВ (ProcessВ Tree)В ofВ theВ malware.ДЇigureВ 2В Output ofВ theВ MalwareВ ProcessВ Tree TheВ text sectionВ of the malwareВ sampleВ hasВ aВ high entropy value,В indicatingВ thatВ itВ isВ packed/encrypted.В The malware has beenВ developedВ usingВ theВ C/C++ language,В andВ itsВ staticВ informationВ isВ shown in figure 1.ДЇigureВ 1В StaticВ InformationВ of theВ Sample

Djvu downloader software#

TheВ CybleВ research teamВ found a sample ofВ theВ DJVUВ malwareВ and performedВ theВ technical analysis.В WeВ haveВ identifiedВ thatВ the malwareВ enters theВ systems ofВ usersВ whenВ theyВ download and executeВ malicious files masqueradingВ asВ software cracks or keygensВ thatВ allow users to use paid software for freeВ byВ downloadingВ fromВ torrent. InВ the course ofВ our routineВ darkwebВ monitoring,В theВ CybleВ research team discoveredВ aВ newВ variant ofВ theВ DJVUВ malware that belongs to theВ STOP ransomware family.В ThisВ new variantВ has becomeВ one ofВ theВ most widespread file-encryptingВ virusesВ of 2021.ДJVUВ was first identified in December 2018.В In addition toВ attacks in theВ United States,В most of its victims are from Europe, Asia, South American, and Africa.В TheВ DJVUВ malwareВ usesВ Advanced Encryption Standard (AES)В orВ RSA cryptographyВ algorithmsВ forВ encrypting files in the victim machine.