Analysis

  • max time kernel
    153s
  • max time network
    185s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    07-07-2022 21:11

General

  • Target

    43fb7bf938736abced7de012b8395088752387ddccce4521af977410c3b4a1b9.exe

  • Size

    424KB

  • MD5

    197ef937b8c32bec4f8a0db5b1e8df7f

  • SHA1

    735102b45ca1e87ed6fbc045cc41483e795dbf21

  • SHA256

    43fb7bf938736abced7de012b8395088752387ddccce4521af977410c3b4a1b9

  • SHA512

    0c24f36e6d466c19d4b20ebee30259a2e7d1cb3cd957708ab46b993433f510cc97d42bd192f6a9ceb0c517c88c56397189af3088083534a357ac017b4a4a1403

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-2632097139-1792035885-811742494-1000\_RECoVERY_+tjelg.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/545E80C5DEB6755 2. http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/545E80C5DEB6755 3. http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/545E80C5DEB6755 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/545E80C5DEB6755 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/545E80C5DEB6755 http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/545E80C5DEB6755 http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/545E80C5DEB6755 *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/545E80C5DEB6755
URLs

http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/545E80C5DEB6755

http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/545E80C5DEB6755

http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/545E80C5DEB6755

http://xlowfznrg4wf7dli.ONION/545E80C5DEB6755

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 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\43fb7bf938736abced7de012b8395088752387ddccce4521af977410c3b4a1b9.exe
    "C:\Users\Admin\AppData\Local\Temp\43fb7bf938736abced7de012b8395088752387ddccce4521af977410c3b4a1b9.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4636
    • C:\Windows\mutkxwcmngxq.exe
      C:\Windows\mutkxwcmngxq.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:1864
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2836
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\43FB7B~1.EXE
      2⤵
        PID:2772
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3908

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\mutkxwcmngxq.exe

      Filesize

      424KB

      MD5

      197ef937b8c32bec4f8a0db5b1e8df7f

      SHA1

      735102b45ca1e87ed6fbc045cc41483e795dbf21

      SHA256

      43fb7bf938736abced7de012b8395088752387ddccce4521af977410c3b4a1b9

      SHA512

      0c24f36e6d466c19d4b20ebee30259a2e7d1cb3cd957708ab46b993433f510cc97d42bd192f6a9ceb0c517c88c56397189af3088083534a357ac017b4a4a1403

    • C:\Windows\mutkxwcmngxq.exe

      Filesize

      424KB

      MD5

      197ef937b8c32bec4f8a0db5b1e8df7f

      SHA1

      735102b45ca1e87ed6fbc045cc41483e795dbf21

      SHA256

      43fb7bf938736abced7de012b8395088752387ddccce4521af977410c3b4a1b9

      SHA512

      0c24f36e6d466c19d4b20ebee30259a2e7d1cb3cd957708ab46b993433f510cc97d42bd192f6a9ceb0c517c88c56397189af3088083534a357ac017b4a4a1403

    • memory/1864-135-0x0000000000000000-mapping.dmp

    • memory/1864-144-0x00000000021D0000-0x0000000002255000-memory.dmp

      Filesize

      532KB

    • memory/2772-138-0x0000000000000000-mapping.dmp

    • memory/2836-145-0x0000000000000000-mapping.dmp

    • memory/4636-130-0x0000000000AB0000-0x0000000000B35000-memory.dmp

      Filesize

      532KB

    • memory/4636-131-0x0000000000400000-0x00000000004AD000-memory.dmp

      Filesize

      692KB

    • memory/4636-139-0x0000000000AB0000-0x0000000000B35000-memory.dmp

      Filesize

      532KB