Analysis

  • max time kernel
    10s
  • max time network
    13s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-10-2022 07:48

General

  • Target

    885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe

  • Size

    424KB

  • MD5

    823ece0c42f0a1527a81efe1cff9591a

  • SHA1

    dc0fc3de6b66447a632d1055fe58d59e2f3c0099

  • SHA256

    885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906

  • SHA512

    c651c4641f9edc780b9eee94342eeafb0d074cbe3a196660c9c55e7ba54c653dfe6e9112e329ff6d1361cd43939725ae5d0b708042d28e51c1c99151af45a360

  • SSDEEP

    6144:BJOrslDNrfqw5W9RtPLal1tBzAF2Rg/zUZjpMWMl4ZC824UzHoXbftChXW3AxfuJ:BJOrSNr4S77zAJzUZ1azKblCJxfS6

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-929662420-1054238289-2961194603-1000\_RECoVERY_+ytcth.txt

Family

teslacrypt

Ransom Note
NOT YOUR LANGUAGE? USE https://translate.google.com What happened to your files ? All of your files were protected by a strong encryption with AES More information about the encryption keys using AES can be found here: http://en.wikipedia.org/wiki/AES How did this happen ? !!! Specially for your PC was generated personal AES KEY, both public and private. !!! ALL YOUR FILES were encrypted with the public key, which has been transferred to your computer via the Internet. !!! Decrypting of your files is only possible with the help of the private key and decrypt program , which is on our Secret Server What do I do ? So, there are two ways you can choose: wait for a miracle and get your price doubled, or start obtaining BITCOIN NOW! , and restore your data easy way. If You have really valuable data, you better not waste your time, because there is no other way to get your files, except make a payment. For more specific instructions, please visit your personal home page, there are a few different addresses pointing to your page below: 1. http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/445EF8D5A976D5C 2. http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/445EF8D5A976D5C 3. http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/445EF8D5A976D5C If for some reasons the addresses are not available, follow these steps: 1. Download and install tor-browser: http://www.torproject.org/projects/torbrowser.html.en 2. After a successful installation, run the browser 3. Type in the address bar: xlowfznrg4wf7dli.onion/445EF8D5A976D5C 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/445EF8D5A976D5C http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/445EF8D5A976D5C http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/445EF8D5A976D5C *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/445EF8D5A976D5C
URLs

http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/445EF8D5A976D5C

http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/445EF8D5A976D5C

http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/445EF8D5A976D5C

http://xlowfznrg4wf7dli.ONION/445EF8D5A976D5C

Signatures

  • TeslaCrypt, AlphaCrypt

    Ransomware based on CryptoLocker. Shut down by the developers in 2016.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 54 IoCs
  • Suspicious use of AdjustPrivilegeToken 47 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe
    "C:\Users\Admin\AppData\Local\Temp\885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1756
    • C:\Windows\rviejkpjudmk.exe
      C:\Windows\rviejkpjudmk.exe
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:204
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1644
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\885BD1~1.EXE
      2⤵
        PID:3880
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4068

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\rviejkpjudmk.exe

      Filesize

      424KB

      MD5

      823ece0c42f0a1527a81efe1cff9591a

      SHA1

      dc0fc3de6b66447a632d1055fe58d59e2f3c0099

      SHA256

      885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906

      SHA512

      c651c4641f9edc780b9eee94342eeafb0d074cbe3a196660c9c55e7ba54c653dfe6e9112e329ff6d1361cd43939725ae5d0b708042d28e51c1c99151af45a360

    • C:\Windows\rviejkpjudmk.exe

      Filesize

      424KB

      MD5

      823ece0c42f0a1527a81efe1cff9591a

      SHA1

      dc0fc3de6b66447a632d1055fe58d59e2f3c0099

      SHA256

      885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906

      SHA512

      c651c4641f9edc780b9eee94342eeafb0d074cbe3a196660c9c55e7ba54c653dfe6e9112e329ff6d1361cd43939725ae5d0b708042d28e51c1c99151af45a360

    • memory/204-136-0x0000000000000000-mapping.dmp

    • memory/204-145-0x00000000021B0000-0x0000000002235000-memory.dmp

      Filesize

      532KB

    • memory/1644-146-0x0000000000000000-mapping.dmp

    • memory/1756-132-0x0000000000400000-0x00000000004AD000-memory.dmp

      Filesize

      692KB

    • memory/1756-139-0x0000000002250000-0x00000000022D5000-memory.dmp

      Filesize

      532KB

    • memory/3880-140-0x0000000000000000-mapping.dmp