Windows 7 deprecation

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Analysis

  • max time kernel
    120s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    01/10/2023, 14:00

General

  • Target

    17bf10e4dd21565658610824afa990f2f474c39a396510701425ef740343fdbd.exe

  • Size

    138KB

  • MD5

    254df705ae1572e5bb33fdf9bdd38bb6

  • SHA1

    3d40b40f626cae4d3499e72288cfdfe409df72ac

  • SHA256

    17bf10e4dd21565658610824afa990f2f474c39a396510701425ef740343fdbd

  • SHA512

    60ba12b65eca7387733707eb27a39c076e9a0d3945555638262030b3bd32e8dd1d584ec59bcce26d96ef217f08a06c582289914229c19ad857ddde789474bf17

  • SSDEEP

    3072:MbvdlTga8za7/aApO6fCR6kMgoXpOpo7KqXd4ljqEJSfMKRuF2f0xsxT626f/GAo:MDppOabdUj1J+MKRaKPLAm3zRd

Malware Config

Extracted

Path

C:\ProgramData\README ELECTRONIC.txt

Ransom Note
Electronic Ransmoware ATTENTION! At the moment, your system is not protected. We can fix itand restore files. To get started, send a file to decrypt trial. You can trust us after opening the test file. 2.Do not use free programs to unlock. To restore the system write to both : [email protected] and [email protected] Telegram id:@mgam161 Your Decryption ID: 142B4BFB2B4FD9BD

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (9322) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Interacts with shadow copies 2 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\17bf10e4dd21565658610824afa990f2f474c39a396510701425ef740343fdbd.exe
    "C:\Users\Admin\AppData\Local\Temp\17bf10e4dd21565658610824afa990f2f474c39a396510701425ef740343fdbd.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1728
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2332
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2664
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2384
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2152
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2840

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\README ELECTRONIC.txt

    Filesize

    424B

    MD5

    771c185bef12d25590f660e626f75c8d

    SHA1

    58b5ba8fdfe8536324ee29f1db014a8011b9c665

    SHA256

    64d1a92068aa43e8d666a9f06984975287af4f879a841cbff2e6e2777c1386e6

    SHA512

    db4e6515a47c4782222c178af8fa67be37cc7d4cdb2add717cc347f9e6ab45b78da934d358384f8bc46573ab803c5133158f26ab22606eac07d6de238049cad6