Analysis

  • max time kernel
    221s
  • max time network
    261s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-11-2022 22:48

General

  • Target

    fujian_xst.exe

  • Size

    1.3MB

  • MD5

    51bd2ef56c691effd229419d38f75087

  • SHA1

    f6dc0bfd564641a7ff6c6acf5c85061039310c4a

  • SHA256

    b5a63eba28ae7799be4a7482b427133f92e3d5bdbf2019f931f785b0b5dc3aac

  • SHA512

    4aa45c9f8e311d8861909aa9c859432020440faf4b9c3194f5081a22a40baec3066bb19b6af31933ef231c0171301a8b40c5e37d754e70c911accd0078bb6de5

  • SSDEEP

    24576:dS7PvNyB1bUSbLtxCl1xYBeJjrgIk6bWWbCcKk4gV2V0jG3A:dSE1jMbPJ06bWbcIY2mf

Malware Config

Signatures

  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • UPX packed file 2 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fujian_xst.exe
    "C:\Users\Admin\AppData\Local\Temp\fujian_xst.exe"
    1⤵
    • Loads dropped DLL
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:1204

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Bootkit

1
T1067

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\AntiVC.dll
    Filesize

    42KB

    MD5

    d7d0661ef693c8aceebcc52ffc620c9b

    SHA1

    9b6f144ab58736d7ae685985727572a008d28fbe

    SHA256

    dbeceadf49a2e2a33af612d08938cd78951eea7038e09952c032bd70dd25a1f4

    SHA512

    babed456f3b994ce915a310d29b303dfb870c6474a750fc04f695d71fa51394869c2e578d5d33e750c83ee161b77c1a1e459b5e9813b12e83bd7ab8f2b080c6a

  • memory/1204-134-0x0000000010000000-0x0000000010046000-memory.dmp
    Filesize

    280KB