Analysis

  • max time kernel
    148s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    02-12-2022 15:34

General

  • Target

    4420dc219a3c12092a0b98d7fbfa2480dd97ba81468fec97e7c71165ea5868fb.xls

  • Size

    114KB

  • MD5

    74cd2294dfe3bd8db7af6f63baf95734

  • SHA1

    29f6d3e17a023b35f8cd4a8f294ac37018ca9cce

  • SHA256

    4420dc219a3c12092a0b98d7fbfa2480dd97ba81468fec97e7c71165ea5868fb

  • SHA512

    a6d5d488100bdd23039a54c9aab04173185890214a92b4a8cecf922c3fe2b3c71ac8bdd4957f2b989696fa0a238cae7353aa73a6dad38f542fae5747f37cec10

  • SSDEEP

    3072:Pbn4o+VVWVbrzQ7t6WTk9ajoJtXw85k0YZKNur:Pbn4o+VX6n

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.

  • 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
  • Suspicious behavior: AddClipboardFormatListener 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\4420dc219a3c12092a0b98d7fbfa2480dd97ba81468fec97e7c71165ea5868fb.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:916
    • 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:1124
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:784
    • 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:1884
    • 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:1492

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/784-222-0x0000000000000000-mapping.dmp
  • memory/916-54-0x000000002FD61000-0x000000002FD64000-memory.dmp
    Filesize

    12KB

  • memory/916-55-0x0000000071D11000-0x0000000071D13000-memory.dmp
    Filesize

    8KB

  • memory/916-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/916-57-0x0000000072CFD000-0x0000000072D08000-memory.dmp
    Filesize

    44KB

  • memory/916-58-0x0000000076871000-0x0000000076873000-memory.dmp
    Filesize

    8KB

  • memory/916-314-0x0000000072CFD000-0x0000000072D08000-memory.dmp
    Filesize

    44KB

  • memory/1124-219-0x0000000000000000-mapping.dmp
  • memory/1492-221-0x0000000000000000-mapping.dmp
  • memory/1884-220-0x0000000000000000-mapping.dmp