Resubmissions

08/07/2025, 08:09

250708-j16kvavwcx 10

04/07/2025, 04:30

250704-e483xsap8v 10

13/05/2024, 10:29

240513-mjfjwabd28 10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/05/2024, 10:29

General

  • Target

    WORM_VOBFUS.exe

  • Size

    212KB

  • MD5

    7b19b2b8aed0285eb2b2c5cb81313569

  • SHA1

    e0a536ed1b6c6f202412079e1213305543b533a3

  • SHA256

    e54bbabcaed8ace734f53234a44ad1e697e9cd2252255b59906fc5e3322c1be6

  • SHA512

    31f79937bb4aba8aecd95daf310c9dd22f06f4f842f4bae64502e27e44aa3ef26f25d8d72adae36f25aa4db6f7b229926dc8bda4d09613f7d1f6968a15cc2eb0

  • SSDEEP

    3072:/lh+mENvtRR3FmHmpF+CklMnQIKAWNBlm/XBq6ciFCdaNdVOvs:9h+NNFRRCmpF+CklMYuFciFC+Ok

Score
10/10

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 27 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\WORM_VOBFUS.exe
    "C:\Users\Admin\AppData\Local\Temp\WORM_VOBFUS.exe"
    1⤵
    • Modifies visiblity of hidden/system files in Explorer
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3940
    • C:\Users\Admin\koiemo.exe
      "C:\Users\Admin\koiemo.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:412
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3940 -s 1448
      2⤵
      • Program crash
      PID:1348
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 3940 -ip 3940
    1⤵
      PID:2580

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Users\Admin\koiemo.exe

            Filesize

            212KB

            MD5

            16cf87f7b73ceaa91e67b71ad90751b8

            SHA1

            174b41c2251a917fd845e9fd58d0e918a38eb838

            SHA256

            fc98af857f44d435f5736eb9508d3b48304c58b1b3d786ac685c179743d8d43e

            SHA512

            707846c7b093751efbc7c531972c369ec00415454d4e1b1ee42b590c2933f9107ba74b3d83f077886473173225cd050207dac3db6ebcb142a0b8bfbf8283465e