Analysis

  • max time kernel
    165s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2022 19:26

General

  • Target

    Ҵֱ20%ϵ//K4ܶ�.xls

  • Size

    3.8MB

  • MD5

    5034b373deecdf5033842f862fe84017

  • SHA1

    1d6c5eca4e7c46c088469fb2467c156d1d4f01aa

  • SHA256

    7e28d57e91aa0641833ae349b3fe7f7744b7e9b44f9c4b4d07b4beb6efad15e0

  • SHA512

    b850379d21ec58b70e4a5d5d8f1efd3517b7a8692dbe6e3bc74e2109e6e7eea44ddf283424aa14a1215d972bfa1319f5d511bb16c3420f6f07640a64a8144425

  • SSDEEP

    24576:Z/PeImtz+7l/XcHsIDUEEOCeZNIGb3tgjXBwcN62RViq5HSU6cHj0UiYiq15R4Zn:mztUL9/MEYl

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 3 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Deletes itself 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Ҵֱ20%ϵ\\K4ܶ�.xls
    1⤵
    • Deletes itself
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • NTFS ADS
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: RenamesItself
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1084
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2020
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        2⤵
        • Process spawned unexpected child process
        • Suspicious use of WriteProcessMemory
        PID:1496
        • C:\Windows\SysWOW64\attrib.exe
          attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
          3⤵
          • Views/modifies file attributes
          PID:1068
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c Del /F /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        2⤵
        • Process spawned unexpected child process
        PID:1692
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c RD /S /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        2⤵
        • Process spawned unexpected child process
        PID:1296

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Hidden Files and Directories

    1
    T1158

    Defense Evasion

    Modify Registry

    1
    T1112

    Hidden Files and Directories

    1
    T1158

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1068-64-0x0000000000000000-mapping.dmp
    • memory/1084-65-0x0000000072BFD000-0x0000000072C08000-memory.dmp
      Filesize

      44KB

    • memory/1084-55-0x0000000071C11000-0x0000000071C13000-memory.dmp
      Filesize

      8KB

    • memory/1084-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1084-57-0x0000000076401000-0x0000000076403000-memory.dmp
      Filesize

      8KB

    • memory/1084-58-0x0000000072BFD000-0x0000000072C08000-memory.dmp
      Filesize

      44KB

    • memory/1084-67-0x0000000072BFD000-0x0000000072C08000-memory.dmp
      Filesize

      44KB

    • memory/1084-66-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1084-54-0x000000002F0B1000-0x000000002F0B4000-memory.dmp
      Filesize

      12KB

    • memory/1296-63-0x0000000000000000-mapping.dmp
    • memory/1496-61-0x0000000000000000-mapping.dmp
    • memory/1692-62-0x0000000000000000-mapping.dmp
    • memory/2020-60-0x000007FEFC341000-0x000007FEFC343000-memory.dmp
      Filesize

      8KB

    • memory/2020-59-0x0000000000000000-mapping.dmp