This ransomware uses the file name extension. It encrypts files with the following file name extensions:Įach encrypted file will have the initialization vector written in the first 16 bytes. It then scans all drives and starts the encryption process. It also drops a file containing the initialization vectors in the %TEMP% folder: However, if all domains fail to provide a response, this ransomware uses hardcoded key: S25943n9Gt099y4K.įor initialization vector, this threats always uses the hardcoded key: EP866p5M93wDS513. Any of the above URLs may respond with a 16-bit key to be used for encryption.It attempts to fetch the encryption key from the following servers: This ransomware encrypts files using AES 128-bit in CBC mode using Windows Crypto API. This ransomware generates a pseudo-random 19-character long ID using lowercase letters and digits used to uniquely identify the machine. schtasks /create /SC MINUTE /MO 15 /tn ihsdj /TR "pcalua.exe -a %temp%/ihsdj.exe".It creates a scheduled task so that it will be re-launched every 15 minutes by issuing the following command: If the system language is Korean, this threat drops a copy of itself into the %TEMP% folder and tries to ensure persistance by using task scheduler: Otherwise, self-deletes after three seconds. If the system language is Korean, it launches its malicious routines. ![]() When run, it checks the machine's default system language. This threat may be installed by the Magnitude exploit kit. If you’re using Windows XP, see our Windows XP end of support page. You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help. Go to Settings > Update & security > Windows Defender > Windows Defender Security Center > Virus & threat protection and make sure that your Cloud-based Protection settings is turned On. It’s turned on by default for Microsoft Security Essentials and Microsoft Defender Antivirus for Windows 10. Use cloud protection to help guard against the latest malware threats. See our advanced troubleshooting page for more help. To restore your PC, you might need to download and run Windows Defender Offline. Microsoft Defender Antivirus for Windows 10 and Windows 8.1, or Microsoft Security Essentials for Windows 7 and Windows Vista.Use the following free Microsoft software to detect and remove this threat: ![]() If you've already paid, see our ransomware page for help on what to do now. ![]() There is no guarantee that paying the ransom will give you access to your files. There is no one-size-fits-all response if you have been victimized by ransomware.
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