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Analysis

  • max time kernel
    102s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    31/01/2023, 17:28

General

  • Target

    ca9141d70ac492e6adb61f3c7e14ed59.xls

  • Size

    289KB

  • MD5

    ca9141d70ac492e6adb61f3c7e14ed59

  • SHA1

    56ebf9533953af1c34f3bc89b527c78fecb1cbce

  • SHA256

    b6a2a4a911c808f75204b6fbf55a0fc4c6408b0240d3f59e8e5933b186a1d68f

  • SHA512

    73ad90fc3017ff4424e8b805655ba31976e174dd815786ccc5230d359b5c33af0c025692a285f5150031a0d8d04df143e61a1f3783369738f82643784be43834

  • SSDEEP

    3072:LP99KZ26S+xPffpSRRRDLuTUXnPjAYmOEHEGjq4yW9WDecBGPfeZh1HHebx8kAP7:D9YZ26S+PW5EwNMY68h8CO3

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 SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 16 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\ca9141d70ac492e6adb61f3c7e14ed59.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 SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1080
    • 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:1092
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:932
    • 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:1804
    • 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:1692

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1080-223-0x0000000005620000-0x0000000005720000-memory.dmp

    Filesize

    1024KB

  • memory/1080-385-0x0000000071ECD000-0x0000000071ED8000-memory.dmp

    Filesize

    44KB

  • memory/1080-57-0x0000000075671000-0x0000000075673000-memory.dmp

    Filesize

    8KB

  • memory/1080-58-0x0000000071ECD000-0x0000000071ED8000-memory.dmp

    Filesize

    44KB

  • memory/1080-388-0x0000000071ECD000-0x0000000071ED8000-memory.dmp

    Filesize

    44KB

  • memory/1080-387-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1080-386-0x0000000005620000-0x0000000005720000-memory.dmp

    Filesize

    1024KB

  • memory/1080-55-0x0000000070EE1000-0x0000000070EE3000-memory.dmp

    Filesize

    8KB

  • memory/1080-54-0x000000002F531000-0x000000002F534000-memory.dmp

    Filesize

    12KB

  • memory/1080-224-0x0000000005620000-0x0000000005720000-memory.dmp

    Filesize

    1024KB

  • memory/1080-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB