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Analysis

  • max time kernel
    132s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/12/2023, 20:31

General

  • Target

    3b63d7222681fa59ebceb25e055a671a.exe

  • Size

    174KB

  • MD5

    3b63d7222681fa59ebceb25e055a671a

  • SHA1

    a8d534a18971145d337832ba1ef56c3f16117e9d

  • SHA256

    47c90d55074d2e5990824879cfebb7a09745f0c0779c7f85424146d06ad1cbbb

  • SHA512

    b16b80c50372d4c95e400fb77a674810fda394d1a9d8aca5d47ea5ffd6ea2752bf17752ce41300974bf98fab69c13668c7d56e95f535fee83adee5837e351645

  • SSDEEP

    3072:WnOn7t7XpdpCCTg/sxFgJDZ2CG6m56OX8QPhommcAjDhF1V:WKpdcCrTqtGzIOzP/mcAjDhF1

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3b63d7222681fa59ebceb25e055a671a.exe
    "C:\Users\Admin\AppData\Local\Temp\3b63d7222681fa59ebceb25e055a671a.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3816
    • C:\Users\Admin\AppData\Local\Temp\nsu9FBC.tmp\northstar.exe
      C:\Users\Admin\AppData\Local\Temp\nsu9FBC.tmp\northstar.exe /u4e9422ac-75a8-4a0f-9b5b-46785bc06f2f /e4806050 /dT201212300322
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Drops file in Windows directory
      • Modifies system certificate store
      • Suspicious use of SetWindowsHookEx
      PID:3608

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\nsu9FBC.tmp\System.dll

    Filesize

    21KB

    MD5

    5ebc73650256e9c8ddbcda231db829a1

    SHA1

    988d4535e18754ab2a6248abae96c5697d7dbcd5

    SHA256

    1eaa543842df7795404184e8892a1654b0773dbc9bd8b54c7fdb9e68f4355493

    SHA512

    b21266e76fc7263af982a1336a766e47ccf348ed56b305dbb09f03574c9b2a7309f12200e80d86f9a251381be6e87a41206447f11c51899cb31fba10da1d5270

  • C:\Users\Admin\AppData\Local\Temp\nsu9FBC.tmp\northstar.exe

    Filesize

    275KB

    MD5

    a1e2472db630c7043c2fb486a17300bc

    SHA1

    f289644ce703d4050b49ec0606c543a8f3928624

    SHA256

    0e990e290a6c3b4b3a3ac7495bfc197b698799ae840a06586eb5d5cbe74a1bd7

    SHA512

    3571478424b464b17ef58f43ffca57e09e539e4b83ed1a158694ab4f473001ceb37cb72c850d701767625d515f129a14a1f60446ace745517658923467b01823

  • memory/3608-31-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-32-0x00000000746E0000-0x0000000074C91000-memory.dmp

    Filesize

    5.7MB

  • memory/3608-15-0x00000000746E0000-0x0000000074C91000-memory.dmp

    Filesize

    5.7MB

  • memory/3608-16-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-27-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-28-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-47-0x00000000746E0000-0x0000000074C91000-memory.dmp

    Filesize

    5.7MB

  • memory/3608-43-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-42-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-14-0x00000000746E0000-0x0000000074C91000-memory.dmp

    Filesize

    5.7MB

  • memory/3608-33-0x00000000746E0000-0x0000000074C91000-memory.dmp

    Filesize

    5.7MB

  • memory/3608-34-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-35-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-36-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3608-39-0x0000000000F70000-0x0000000000F80000-memory.dmp

    Filesize

    64KB

  • memory/3816-2-0x0000000000400000-0x000000000043E000-memory.dmp

    Filesize

    248KB

  • memory/3816-30-0x000000006E3C0000-0x000000006E3CD000-memory.dmp

    Filesize

    52KB

  • memory/3816-29-0x0000000000400000-0x000000000043E000-memory.dmp

    Filesize

    248KB

  • memory/3816-51-0x0000000000400000-0x000000000043E000-memory.dmp

    Filesize

    248KB