Analysis

  • max time kernel
    207s
  • max time network
    211s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-08-2022 04:06

General

  • Target

    5a48d53f00afd3a50f06138ba37ca6bb5ff38011801879bdb94215ab8bfdf634.exe

  • Size

    328KB

  • MD5

    452e6b32cf0172170701558e2333d016

  • SHA1

    a9aa39a0765947e12a1475a59740c6de5bb5e7ec

  • SHA256

    5a48d53f00afd3a50f06138ba37ca6bb5ff38011801879bdb94215ab8bfdf634

  • SHA512

    993b3147e0e45444c6f38f917e2bb92d8c63097b1276e6087df19d7396bc06e07d2bd1e9a823649a1d4a1e4037b7845bc8ca7205d8ace8dae07a298116a850e3

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-1101907861-274115917-2188613224-1000\Recovery+kxfwl.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 RSA-4096. More information about the encryption keys using RSA-4096 can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem) How did this happen ? !!! Specially for your PC was generated personal RSA-4096 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://tt54rfdjhb34rfbnknaerg.milerteddy.com/4150836BEA36A73A 2. http://kkd47eh4hdjshb5t.angortra.at/4150836BEA36A73A 3. http://ytrest84y5i456hghadefdsd.pontogrot.com/4150836BEA36A73A 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/4150836BEA36A73A 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://tt54rfdjhb34rfbnknaerg.milerteddy.com/4150836BEA36A73A http://kkd47eh4hdjshb5t.angortra.at/4150836BEA36A73A http://ytrest84y5i456hghadefdsd.pontogrot.com/4150836BEA36A73A *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/4150836BEA36A73A
URLs

http://tt54rfdjhb34rfbnknaerg.milerteddy.com/4150836BEA36A73A

http://kkd47eh4hdjshb5t.angortra.at/4150836BEA36A73A

http://ytrest84y5i456hghadefdsd.pontogrot.com/4150836BEA36A73A

http://xlowfznrg4wf7dli.ONION/4150836BEA36A73A

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 23 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5a48d53f00afd3a50f06138ba37ca6bb5ff38011801879bdb94215ab8bfdf634.exe
    "C:\Users\Admin\AppData\Local\Temp\5a48d53f00afd3a50f06138ba37ca6bb5ff38011801879bdb94215ab8bfdf634.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3360
    • C:\Windows\aqwvknyalvfe.exe
      C:\Windows\aqwvknyalvfe.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:1808
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /noin teractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4380
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\5A48D5~1.EXE
      2⤵
        PID:712

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\aqwvknyalvfe.exe

      Filesize

      328KB

      MD5

      452e6b32cf0172170701558e2333d016

      SHA1

      a9aa39a0765947e12a1475a59740c6de5bb5e7ec

      SHA256

      5a48d53f00afd3a50f06138ba37ca6bb5ff38011801879bdb94215ab8bfdf634

      SHA512

      993b3147e0e45444c6f38f917e2bb92d8c63097b1276e6087df19d7396bc06e07d2bd1e9a823649a1d4a1e4037b7845bc8ca7205d8ace8dae07a298116a850e3

    • C:\Windows\aqwvknyalvfe.exe

      Filesize

      328KB

      MD5

      452e6b32cf0172170701558e2333d016

      SHA1

      a9aa39a0765947e12a1475a59740c6de5bb5e7ec

      SHA256

      5a48d53f00afd3a50f06138ba37ca6bb5ff38011801879bdb94215ab8bfdf634

      SHA512

      993b3147e0e45444c6f38f917e2bb92d8c63097b1276e6087df19d7396bc06e07d2bd1e9a823649a1d4a1e4037b7845bc8ca7205d8ace8dae07a298116a850e3

    • memory/712-144-0x0000000000000000-mapping.dmp

    • memory/1808-135-0x0000000000000000-mapping.dmp

    • memory/1808-142-0x0000000002180000-0x0000000002206000-memory.dmp

      Filesize

      536KB

    • memory/3360-130-0x0000000002170000-0x00000000021F6000-memory.dmp

      Filesize

      536KB

    • memory/3360-131-0x0000000000400000-0x0000000000495000-memory.dmp

      Filesize

      596KB

    • memory/3360-143-0x0000000002170000-0x00000000021F6000-memory.dmp

      Filesize

      536KB

    • memory/4380-145-0x0000000000000000-mapping.dmp