Analysis

  • max time kernel
    153s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    07/07/2022, 22:28

General

  • Target

    43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33.exe

  • Size

    370KB

  • MD5

    4adab6136c5fe9858c17284cbc253897

  • SHA1

    f343ab2788e410624878a9eaf4a0fc6ae4c814c7

  • SHA256

    43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33

  • SHA512

    c67fc5a8e0d2f958f87c7956e49e689f45cc6814fb98675accf3ceb145abccc8e185ff0bd91e83eda0be5b330409782ab07727a197de32acbc7594d38efad650

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-1083475884-596052423-1669053738-1000\_RECoVERY_+rhomh.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://yyre45dbvn2nhbefbmh.begumvelic.at/59C5873E92D5D779 2. http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/59C5873E92D5D779 3. http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/59C5873E92D5D779 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/59C5873E92D5D779 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://yyre45dbvn2nhbefbmh.begumvelic.at/59C5873E92D5D779 http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/59C5873E92D5D779 http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/59C5873E92D5D779 *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/59C5873E92D5D779
URLs

http://yyre45dbvn2nhbefbmh.begumvelic.at/59C5873E92D5D779

http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/59C5873E92D5D779

http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/59C5873E92D5D779

http://xlowfznrg4wf7dli.ONION/59C5873E92D5D779

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
  • Deletes itself 1 IoCs
  • 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.

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33.exe
    "C:\Users\Admin\AppData\Local\Temp\43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Users\Admin\AppData\Local\Temp\43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33.exe
      "C:\Users\Admin\AppData\Local\Temp\43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33.exe"
      2⤵
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1804
      • C:\Windows\oshkwmseotim.exe
        C:\Windows\oshkwmseotim.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1500
        • C:\Windows\oshkwmseotim.exe
          C:\Windows\oshkwmseotim.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:1624
          • C:\Windows\System32\wbem\WMIC.exe
            "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:852
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\43929F~1.EXE
        3⤵
        • Deletes itself
        PID:432
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1704

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Windows\oshkwmseotim.exe

    Filesize

    370KB

    MD5

    4adab6136c5fe9858c17284cbc253897

    SHA1

    f343ab2788e410624878a9eaf4a0fc6ae4c814c7

    SHA256

    43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33

    SHA512

    c67fc5a8e0d2f958f87c7956e49e689f45cc6814fb98675accf3ceb145abccc8e185ff0bd91e83eda0be5b330409782ab07727a197de32acbc7594d38efad650

  • C:\Windows\oshkwmseotim.exe

    Filesize

    370KB

    MD5

    4adab6136c5fe9858c17284cbc253897

    SHA1

    f343ab2788e410624878a9eaf4a0fc6ae4c814c7

    SHA256

    43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33

    SHA512

    c67fc5a8e0d2f958f87c7956e49e689f45cc6814fb98675accf3ceb145abccc8e185ff0bd91e83eda0be5b330409782ab07727a197de32acbc7594d38efad650

  • C:\Windows\oshkwmseotim.exe

    Filesize

    370KB

    MD5

    4adab6136c5fe9858c17284cbc253897

    SHA1

    f343ab2788e410624878a9eaf4a0fc6ae4c814c7

    SHA256

    43929fd3dc0b319b76e1665f9efd56bafa7aad71f60382a2eb7c9cb4f0f48a33

    SHA512

    c67fc5a8e0d2f958f87c7956e49e689f45cc6814fb98675accf3ceb145abccc8e185ff0bd91e83eda0be5b330409782ab07727a197de32acbc7594d38efad650

  • memory/1624-94-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1624-93-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1624-92-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-63-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-60-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-71-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-69-0x0000000075951000-0x0000000075953000-memory.dmp

    Filesize

    8KB

  • memory/1804-55-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-75-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-65-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-56-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-62-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-70-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1804-58-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/2012-54-0x00000000001B0000-0x00000000001B3000-memory.dmp

    Filesize

    12KB

  • memory/2012-67-0x00000000001B0000-0x00000000001B3000-memory.dmp

    Filesize

    12KB