Analysis

  • max time kernel
    151s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    02-08-2022 02:21

General

  • Target

    5ac4195efe073d84ea88603e45d77a692783aa3f24add4bb078229047fd18c17.exe

  • Size

    364KB

  • MD5

    133177107c86588123cc36624ba8a4f3

  • SHA1

    cf472a1a5758f602cf6e9ca940d14e8709d3ea52

  • SHA256

    5ac4195efe073d84ea88603e45d77a692783aa3f24add4bb078229047fd18c17

  • SHA512

    2d30007f2b47d72315d9864408bca75d14fca4b1c5fe37754263ca6a64129792c3db7cb7be8952f595b9a78288446a53645fb2382843dd2a3282729da5d409ec

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-3440072777-2118400376-1759599358-1000\_RECoVERY_+ejrcn.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/6FECC19728485F3D 2. http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/6FECC19728485F3D 3. http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/6FECC19728485F3D 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/6FECC19728485F3D 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://yyre45dbvn2nhbefbmh.begumvelic.at/6FECC19728485F3D http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/6FECC19728485F3D http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/6FECC19728485F3D *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/6FECC19728485F3D
URLs

http://yyre45dbvn2nhbefbmh.begumvelic.at/6FECC19728485F3D

http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/6FECC19728485F3D

http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/6FECC19728485F3D

http://xlowfznrg4wf7dli.ONION/6FECC19728485F3D

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
  • Modifies extensions of user files 3 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Deletes itself 1 IoCs
  • Drops startup file 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5ac4195efe073d84ea88603e45d77a692783aa3f24add4bb078229047fd18c17.exe
    "C:\Users\Admin\AppData\Local\Temp\5ac4195efe073d84ea88603e45d77a692783aa3f24add4bb078229047fd18c17.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1868
    • C:\Windows\ehwfxdmverca.exe
      C:\Windows\ehwfxdmverca.exe
      2⤵
      • Executes dropped EXE
      • Modifies extensions of user files
      • Drops startup file
      • 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:2040
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:696
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\5AC419~1.EXE
      2⤵
      • Deletes itself
      PID:1328
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:980

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Windows\ehwfxdmverca.exe

    Filesize

    364KB

    MD5

    133177107c86588123cc36624ba8a4f3

    SHA1

    cf472a1a5758f602cf6e9ca940d14e8709d3ea52

    SHA256

    5ac4195efe073d84ea88603e45d77a692783aa3f24add4bb078229047fd18c17

    SHA512

    2d30007f2b47d72315d9864408bca75d14fca4b1c5fe37754263ca6a64129792c3db7cb7be8952f595b9a78288446a53645fb2382843dd2a3282729da5d409ec

  • C:\Windows\ehwfxdmverca.exe

    Filesize

    364KB

    MD5

    133177107c86588123cc36624ba8a4f3

    SHA1

    cf472a1a5758f602cf6e9ca940d14e8709d3ea52

    SHA256

    5ac4195efe073d84ea88603e45d77a692783aa3f24add4bb078229047fd18c17

    SHA512

    2d30007f2b47d72315d9864408bca75d14fca4b1c5fe37754263ca6a64129792c3db7cb7be8952f595b9a78288446a53645fb2382843dd2a3282729da5d409ec

  • memory/696-70-0x0000000000000000-mapping.dmp

  • memory/1328-63-0x0000000000000000-mapping.dmp

  • memory/1868-54-0x0000000076081000-0x0000000076083000-memory.dmp

    Filesize

    8KB

  • memory/1868-55-0x0000000000400000-0x00000000004A0000-memory.dmp

    Filesize

    640KB

  • memory/1868-59-0x0000000000360000-0x00000000003E6000-memory.dmp

    Filesize

    536KB

  • memory/2040-60-0x0000000000000000-mapping.dmp

  • memory/2040-64-0x0000000000400000-0x00000000004A0000-memory.dmp

    Filesize

    640KB

  • memory/2040-68-0x0000000000370000-0x00000000003F6000-memory.dmp

    Filesize

    536KB