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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/03/2024, 14:08

General

  • Target

    b252f36350548b10cd4a73ed9f681ec5.exe

  • Size

    85KB

  • MD5

    b252f36350548b10cd4a73ed9f681ec5

  • SHA1

    ef86410be6dfbc13624a9b9db188f70b15d13560

  • SHA256

    9099bbe761df281236d333dc2827f8101ff42236e2af32e87f60c9e1e6b8067e

  • SHA512

    17d00f58c8f37a5841dc7cc8cdf3c3fc8e9280583c7151e0d94bbed50ba153488f6a7a9d2969adfa3ab291169f9ed855f28523dc7e7472f09a809c45ef9974c3

  • SSDEEP

    1536:SKcR4mjD9r823FXk+Xb9H/mVlwbe2au5EcWve3dMIZuiGe0:SKcWmjRrz3++r9HOVl/GpWsWIZSf

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b252f36350548b10cd4a73ed9f681ec5.exe
    "C:\Users\Admin\AppData\Local\Temp\b252f36350548b10cd4a73ed9f681ec5.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4500
    • C:\Users\Admin\AppData\Local\Temp\2lhGnVhkZIbuFyP.exe
      C:\Users\Admin\AppData\Local\Temp\2lhGnVhkZIbuFyP.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:400
      • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
        dw20.exe -x -s 820
        3⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of AdjustPrivilegeToken
        PID:3192
    • C:\Windows\CTS.exe
      "C:\Windows\CTS.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:4908

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

    Filesize

    352KB

    MD5

    90eec7434f905289ae71e424907398d0

    SHA1

    f55a4c4f4de702c4859de4146eae1b20eba3a7dc

    SHA256

    37fea280ac04caa4edd0eaa45412c6b471950186248f02e858b2be822db49857

    SHA512

    0ddfe9f8a039ec3ff7ff83c29b2764f8d9c35335b13e20559817a544e28cedc7def6929a9003e7d44b79697d96a970bcd8a01e31bf35c5201a4297f771816073

  • C:\Users\Admin\AppData\Local\Temp\2lhGnVhkZIbuFyP.exe

    Filesize

    56KB

    MD5

    e115521ba14b75f53dcdff087ec6898f

    SHA1

    87103a892bb514a93d485fba221bacb9da3aae25

    SHA256

    59b284d0ad4c2634938e70fae67d9048bd98422d052fbd745a9b80b5fae7ae29

    SHA512

    ab3d097bcf11bf7327a28124052b210f5fb13b9bfb9b7376cae1ba5c30182a330506935288a7fe06b7e3fdd82b57f5c31638f1c301738342819c772b346fa35a

  • C:\Windows\CTS.exe

    Filesize

    29KB

    MD5

    70aa23c9229741a9b52e5ce388a883ac

    SHA1

    b42683e21e13de3f71db26635954d992ebe7119e

    SHA256

    9d25cc704b1c00c9d17903e25ca35c319663e997cb9da0b116790b639e9688f2

    SHA512

    be604a2ad5ab8a3e5edb8901016a76042ba873c8d05b4ef8eec31241377ec6b2a883b51c6912dc7640581ffa624547db334683975883ae74e62808b5ae9ab0b5

  • memory/400-27-0x00007FF8ECE90000-0x00007FF8ED831000-memory.dmp

    Filesize

    9.6MB

  • memory/400-28-0x00007FF8ECE90000-0x00007FF8ED831000-memory.dmp

    Filesize

    9.6MB

  • memory/400-30-0x0000000000E60000-0x0000000000E70000-memory.dmp

    Filesize

    64KB

  • memory/400-40-0x00007FF8ECE90000-0x00007FF8ED831000-memory.dmp

    Filesize

    9.6MB

  • memory/4500-0-0x0000000000710000-0x0000000000727000-memory.dmp

    Filesize

    92KB

  • memory/4500-8-0x0000000000710000-0x0000000000727000-memory.dmp

    Filesize

    92KB

  • memory/4908-9-0x00000000003A0000-0x00000000003B7000-memory.dmp

    Filesize

    92KB