Analysis

  • max time kernel
    169s
  • max time network
    190s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    08-07-2022 03:34

General

  • Target

    421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4.exe

  • Size

    344KB

  • MD5

    1f311617d8a88f03e86576bd13680834

  • SHA1

    53037f750f4c1cb4c527792c02b1878a5ffcf0e3

  • SHA256

    421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4

  • SHA512

    0b5408aa72b44c2a11d97ad936600ac968f0d34d2dc242614cf15bf83fc27e6d066c164bc901b29c4e303f4a43e4839c9dd8a110ac32819f0eb5203cc1c39939

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-2632097139-1792035885-811742494-1000\_RECOVERY_+weknd.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://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/E3274083A85CE13 2. http://tes543berda73i48fsdfsd.keratadze.at/E3274083A85CE13 3. http://tt54rfdjhb34rfbnknaerg.milerteddy.com/E3274083A85CE13 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/E3274083A85CE13 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/E3274083A85CE13 http://tes543berda73i48fsdfsd.keratadze.at/E3274083A85CE13 http://tt54rfdjhb34rfbnknaerg.milerteddy.com/E3274083A85CE13 *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/E3274083A85CE13
URLs

http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/E3274083A85CE13

http://tes543berda73i48fsdfsd.keratadze.at/E3274083A85CE13

http://tt54rfdjhb34rfbnknaerg.milerteddy.com/E3274083A85CE13

http://xlowfznrg4wf7dli.ONION/E3274083A85CE13

Signatures

  • TeslaCrypt, AlphaCrypt

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

  • suricata: ET MALWARE Alphacrypt/TeslaCrypt Ransomware CnC Beacon

    suricata: ET MALWARE Alphacrypt/TeslaCrypt Ransomware CnC Beacon

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 2 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
  • Suspicious use of SetThreadContext 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 26 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4.exe
    "C:\Users\Admin\AppData\Local\Temp\421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2964
    • C:\Users\Admin\AppData\Local\Temp\421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4.exe
      "C:\Users\Admin\AppData\Local\Temp\421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4.exe"
      2⤵
      • Checks computer location settings
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3212
      • C:\Windows\txbpwmaqhlij.exe
        C:\Windows\txbpwmaqhlij.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1792
        • C:\Windows\txbpwmaqhlij.exe
          C:\Windows\txbpwmaqhlij.exe
          4⤵
          • 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:1200
          • C:\Windows\System32\wbem\WMIC.exe
            "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1140
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\421F75~1.EXE
        3⤵
          PID:4468
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3780

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\txbpwmaqhlij.exe

      Filesize

      344KB

      MD5

      1f311617d8a88f03e86576bd13680834

      SHA1

      53037f750f4c1cb4c527792c02b1878a5ffcf0e3

      SHA256

      421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4

      SHA512

      0b5408aa72b44c2a11d97ad936600ac968f0d34d2dc242614cf15bf83fc27e6d066c164bc901b29c4e303f4a43e4839c9dd8a110ac32819f0eb5203cc1c39939

    • C:\Windows\txbpwmaqhlij.exe

      Filesize

      344KB

      MD5

      1f311617d8a88f03e86576bd13680834

      SHA1

      53037f750f4c1cb4c527792c02b1878a5ffcf0e3

      SHA256

      421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4

      SHA512

      0b5408aa72b44c2a11d97ad936600ac968f0d34d2dc242614cf15bf83fc27e6d066c164bc901b29c4e303f4a43e4839c9dd8a110ac32819f0eb5203cc1c39939

    • C:\Windows\txbpwmaqhlij.exe

      Filesize

      344KB

      MD5

      1f311617d8a88f03e86576bd13680834

      SHA1

      53037f750f4c1cb4c527792c02b1878a5ffcf0e3

      SHA256

      421f75f77c368d6cddcc41d6b90583d23c7a4bdcff60fef41c465758d36995e4

      SHA512

      0b5408aa72b44c2a11d97ad936600ac968f0d34d2dc242614cf15bf83fc27e6d066c164bc901b29c4e303f4a43e4839c9dd8a110ac32819f0eb5203cc1c39939

    • memory/1140-148-0x0000000000000000-mapping.dmp

    • memory/1200-142-0x0000000000000000-mapping.dmp

    • memory/1200-149-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/1200-147-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/1200-146-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/1200-145-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/1792-137-0x0000000000000000-mapping.dmp

    • memory/2964-130-0x0000000000B30000-0x0000000000B33000-memory.dmp

      Filesize

      12KB

    • memory/2964-134-0x0000000000B30000-0x0000000000B33000-memory.dmp

      Filesize

      12KB

    • memory/3212-141-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/3212-135-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/3212-132-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/3212-133-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/3212-131-0x0000000000000000-mapping.dmp

    • memory/3212-136-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4468-140-0x0000000000000000-mapping.dmp