Analysis

  • max time kernel
    105s
  • max time network
    43s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    31-01-2023 17:35

General

  • Target

    26d2b3a92fda89574c74d396d85dec67.xls

  • Size

    117KB

  • MD5

    26d2b3a92fda89574c74d396d85dec67

  • SHA1

    5c239039f7f736427ff061f9c448664bafc1007e

  • SHA256

    eae8c6ea0030850478baf007d3253bc9dbf9c2d32770ba7849854fcb3c20a493

  • SHA512

    12450744f25ec19ababe14a279c26cbdb3ffffc4abed302d234c4fc7b8b6a9b503feca787af6d05db42c4451fed933a2c32609de4d0ecd34fdfefc73ec446ada

  • SSDEEP

    1536:T4HPa4Rz/Sbj13z/vHfQseqZyC23udv3OglgAb3NRKBqN/WwF1klo0UviBuEUIzC:pyC23yOglgAb3NRKEJhwzHKxyTk

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 5 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\26d2b3a92fda89574c74d396d85dec67.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:1644
    • 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:888
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1664
    • 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:1816
    • 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:1772

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/888-213-0x0000000000000000-mapping.dmp
  • memory/1644-54-0x000000002FB51000-0x000000002FB54000-memory.dmp
    Filesize

    12KB

  • memory/1644-55-0x0000000071B01000-0x0000000071B03000-memory.dmp
    Filesize

    8KB

  • memory/1644-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1644-57-0x0000000072AED000-0x0000000072AF8000-memory.dmp
    Filesize

    44KB

  • memory/1644-58-0x0000000075E51000-0x0000000075E53000-memory.dmp
    Filesize

    8KB

  • memory/1644-371-0x0000000072AED000-0x0000000072AF8000-memory.dmp
    Filesize

    44KB

  • memory/1644-372-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1644-373-0x0000000072AED000-0x0000000072AF8000-memory.dmp
    Filesize

    44KB

  • memory/1664-216-0x0000000000000000-mapping.dmp
  • memory/1772-215-0x0000000000000000-mapping.dmp
  • memory/1816-214-0x0000000000000000-mapping.dmp