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Analysis

  • max time kernel
    92s
  • max time network
    122s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 16:36

General

  • Target

    8fa3d0be26fb0078bea9668053a2278e.exe

  • Size

    1008KB

  • MD5

    8fa3d0be26fb0078bea9668053a2278e

  • SHA1

    9f7a61325107bff5f2ac2dc5e9086ec618d970bf

  • SHA256

    2eeb0679d6f277074cd115ea462c110c56c68134027330097f3b5c5a3237a959

  • SHA512

    51ce166d7b00dfd03e8a6735ea9489f6efc79f397e109e91ff980fa49bc864cf41841aaf1882d938ad5f52841ab06376097efe5e1545d83f0339776ade93ce03

  • SSDEEP

    12288:sc4+Lnk67JtN5M9UeGFpNFQfQ+1XNyDTzA8GrSHEU3cRuwjQKd9NIXRHQMDhbnxF:pdDxofGYfQ+9EnBGrSkVu102RHQkhbn

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 1 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

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

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

  • Modifies Internet Explorer start page 1 TTPs 1 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe
    "C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies Internet Explorer start page
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2708
    • C:\Windows\SysWOW64\Regsvr32.exe
      Regsvr32.exe /s C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:2176
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DelTemp.bat" "
      2⤵
        PID:4232

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll

      Filesize

      574KB

      MD5

      923512e3c24ab8c1bae00c8651517f62

      SHA1

      4946a5ac59527f210f9bb63584d2b75935304653

      SHA256

      531ab7f4453e2807d9bcd242dc5f8d94780499932b14c10b6009c36d9dec4f21

      SHA512

      2ef5bfea63e515598d30bf128acda0713fdf2e32f10003b97a9d719cd2cb1494ac5f91983b69099178c6b4593e689738d47aa277aa55a3f59f0b35d649d6ba67

    • C:\Users\Admin\AppData\Local\Temp\DelTemp.bat

      Filesize

      123B

      MD5

      b12493931e5294e78df99889cf3ab3ce

      SHA1

      d7da714fb97888d8a8cac64e220e410c380d461e

      SHA256

      661eada4df31a24144e47949d7c3e9406a06b9339af09d64912dce199373d02e

      SHA512

      7089e09c695c6901886bca32104d1c67e65572489fa63f60ca99a14b29dd41675871c3a31249bcf109f7fc3640dc9b39027f1132820923d9a2bc7cecad9b1f05

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.url

      Filesize

      103B

      MD5

      534bb0175e95a0aae130995e507d5e05

      SHA1

      295077632d9815e4af4c30718f4534133a45b5b5

      SHA256

      cfa730e16a89744189ce9f198e27843c1063fbce23722e73f7e72dca23221ead

      SHA512

      df7ce3ee1c8ae3b8b2142e5929b4ab4b3a4c0a5dfab030baa26b18f0d81a310a3b48664ae148dfd02f4aa6d07d37c625ae29571c361997e88fe03323cfbdbf51

    • memory/2708-1-0x00000000022B0000-0x00000000022B1000-memory.dmp

      Filesize

      4KB

    • memory/2708-26-0x0000000000400000-0x0000000000501000-memory.dmp

      Filesize

      1.0MB