Analysis

  • max time kernel
    10s
  • max time network
    11s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-10-2022 11:55

General

  • Target

    987b53381225e6a6ceae4ec2f19d51d1beaa00cef55773c92ec31341fd3c8eb9.exe

  • Size

    360KB

  • MD5

    dbba8491644acf773a7ade54a01181b0

  • SHA1

    60220c18cead8c45b77fc4bc431650e4793a97e6

  • SHA256

    987b53381225e6a6ceae4ec2f19d51d1beaa00cef55773c92ec31341fd3c8eb9

  • SHA512

    771efbea0cf149bc2448f5f7f4c8c16dfea660ed82035de3a67a090fb39cfe9efeb5f64e1e689bb671fd027a9448bec24e7b3a1f25fd623a5f1a1e2213c79f60

  • SSDEEP

    6144:kbxWqS4cQubBuQEFpyPdD6pE7e6iWiSunrany7nZ+f5vSMnb3on:kb4rQ2BuxF7wl4n+y7Z+f5vdon

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-2295526160-1155304984-640977766-1000\_ReCoVeRy_+yefej.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 RSA4096 More information about the encryption keys using RSA4096 can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem) How did this happen ? !!! Specially for your PC was generated personal RSA4096 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://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/4C31E6BEDDAF2527 2 - http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/4C31E6BEDDAF2527 3 - http://yyre45dbvn2nhbefbmh.begumvelic.at/4C31E6BEDDAF2527 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/4C31E6BEDDAF2527 4 - Follow the instructions on the site IMPORTANT INFORMATION Your personal pages http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/4C31E6BEDDAF2527 http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/4C31E6BEDDAF2527 http://yyre45dbvn2nhbefbmh.begumvelic.at/4C31E6BEDDAF2527 Your personal page Tor-Browser xlowfznrg4wf7dli.ONION/4C31E6BEDDAF2527
URLs

http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/4C31E6BEDDAF2527

http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/4C31E6BEDDAF2527

http://yyre45dbvn2nhbefbmh.begumvelic.at/4C31E6BEDDAF2527

http://xlowfznrg4wf7dli.ONION/4C31E6BEDDAF2527

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 64 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\987b53381225e6a6ceae4ec2f19d51d1beaa00cef55773c92ec31341fd3c8eb9.exe
    "C:\Users\Admin\AppData\Local\Temp\987b53381225e6a6ceae4ec2f19d51d1beaa00cef55773c92ec31341fd3c8eb9.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:848
    • C:\Windows\dxpftlwfqjlq.exe
      C:\Windows\dxpftlwfqjlq.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:4440
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\987B53~1.EXE
      2⤵
        PID:4872
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2232

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\dxpftlwfqjlq.exe

      Filesize

      360KB

      MD5

      dbba8491644acf773a7ade54a01181b0

      SHA1

      60220c18cead8c45b77fc4bc431650e4793a97e6

      SHA256

      987b53381225e6a6ceae4ec2f19d51d1beaa00cef55773c92ec31341fd3c8eb9

      SHA512

      771efbea0cf149bc2448f5f7f4c8c16dfea660ed82035de3a67a090fb39cfe9efeb5f64e1e689bb671fd027a9448bec24e7b3a1f25fd623a5f1a1e2213c79f60

    • C:\Windows\dxpftlwfqjlq.exe

      Filesize

      360KB

      MD5

      dbba8491644acf773a7ade54a01181b0

      SHA1

      60220c18cead8c45b77fc4bc431650e4793a97e6

      SHA256

      987b53381225e6a6ceae4ec2f19d51d1beaa00cef55773c92ec31341fd3c8eb9

      SHA512

      771efbea0cf149bc2448f5f7f4c8c16dfea660ed82035de3a67a090fb39cfe9efeb5f64e1e689bb671fd027a9448bec24e7b3a1f25fd623a5f1a1e2213c79f60

    • memory/848-133-0x0000000002230000-0x00000000022B6000-memory.dmp

      Filesize

      536KB

    • memory/848-132-0x0000000000400000-0x000000000049D000-memory.dmp

      Filesize

      628KB

    • memory/848-145-0x0000000002230000-0x00000000022B6000-memory.dmp

      Filesize

      536KB

    • memory/4440-137-0x0000000000000000-mapping.dmp

    • memory/4440-146-0x0000000000980000-0x0000000000A06000-memory.dmp

      Filesize

      536KB

    • memory/4688-147-0x0000000000000000-mapping.dmp

    • memory/4872-144-0x0000000000000000-mapping.dmp