Analysis

  • max time kernel
    122s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-01-2024 15:27

General

  • Target

    8ca6b7929ece89d8d9050ae9f1e6c1b3dfa87217272e114e464160dce036463c.exe

  • Size

    31KB

  • MD5

    310342183f3632361ced85fdf54b6370

  • SHA1

    5434cd3e67dd4b9bd06f2feb99a165dcf3535ae6

  • SHA256

    8ca6b7929ece89d8d9050ae9f1e6c1b3dfa87217272e114e464160dce036463c

  • SHA512

    e8f57e7fcb5a75b159e6c718d80d5354f1c4d8cffa17b06cf4b8c4367898520ac58405a42eb9119d04dece63dd5bbdeed2c876a59e8926d12d6a78a42790ccff

  • SSDEEP

    384:IU/nB6QSb+Pg+zb4UCmAGq9/KPCl+GVu8K8nZ0bzY3aysYenuJY9/oZqahhbRaAV:IU/nB6QSbcrCoEyClQESbWMccahhtaA

Malware Config

Signatures

  • Renames multiple (2909) files with added filename extension

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

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

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

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

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

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8ca6b7929ece89d8d9050ae9f1e6c1b3dfa87217272e114e464160dce036463c.exe
    "C:\Users\Admin\AppData\Local\Temp\8ca6b7929ece89d8d9050ae9f1e6c1b3dfa87217272e114e464160dce036463c.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Roaming\bcedit.bat"
      2⤵
        PID:5016
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Roaming\reco.bat"
        2⤵
          PID:4148
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Roaming\temp_1.bat"
          2⤵
            PID:3868
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\selfdelete.bat" "
            2⤵
              PID:3432

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • memory/3344-1-0x0000000074530000-0x0000000074CE0000-memory.dmp

            Filesize

            7.7MB

          • memory/3344-0-0x0000000000FE0000-0x0000000000FEE000-memory.dmp

            Filesize

            56KB

          • memory/3344-3-0x0000000074530000-0x0000000074CE0000-memory.dmp

            Filesize

            7.7MB

          • memory/3344-14-0x0000000006470000-0x0000000006480000-memory.dmp

            Filesize

            64KB

          • memory/3344-27847-0x00000000072F0000-0x0000000007894000-memory.dmp

            Filesize

            5.6MB

          • memory/3344-27852-0x0000000074530000-0x0000000074CE0000-memory.dmp

            Filesize

            7.7MB