Analysis

  • max time kernel
    123s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    14-03-2023 08:48

General

  • Target

    6c57a7316681c265364620091d0c3987.xls

  • Size

    165KB

  • MD5

    6c57a7316681c265364620091d0c3987

  • SHA1

    7bb5f4e9c81fb1edd4082aaee065815b255cc2c4

  • SHA256

    245ce9ad11a30c9676c1e395534ecb503f1893bf0ec18d4cd8e46779ede5cbc8

  • SHA512

    1efaa1189ae8ea5ffe54c2a58d910e444096e0d371b60bd47bb045fd96de15894a2c16ff407c73917e585a38a1024cd15c2c050fa4f61421053abea4e1c7be06

  • SSDEEP

    3072:xAOmmA2jcc0lbxOGXJtXwygPQ6VCBxVCS:M+P

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 2 IoCs
  • Suspicious use of SetWindowsHookEx 5 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\6c57a7316681c265364620091d0c3987.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:2040
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1148
      • 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:360
        • C:\Windows\SysWOW64\attrib.exe
          attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
          3⤵
          • Views/modifies file attributes
          PID:764
      • 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:996
      • 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:1696

    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/2040-54-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/2040-56-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-57-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-58-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-59-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-60-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-61-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-260-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-261-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-262-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-373-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-374-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-375-0x0000000000770000-0x0000000000870000-memory.dmp
      Filesize

      1024KB

    • memory/2040-382-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB