Analysis

  • max time kernel
    110s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    02-12-2022 15:34

General

  • Target

    342f54347c50b2e65d24369150d0841558648f37a6f3a8ab7ac450d90e71803a.xls

  • Size

    132KB

  • MD5

    f704f59ddbbb7c3d018a72df027514f0

  • SHA1

    c3fc17f7fe830cae00adb68bcfebed98fa42d154

  • SHA256

    342f54347c50b2e65d24369150d0841558648f37a6f3a8ab7ac450d90e71803a

  • SHA512

    446087bcb7b3b65123350e6f89a9a5f408cc1d071264fd44ee316061dbe0c7c760736f10be055d41e380b26685e09fa80259b9ee3aececdcd5c4e1b23c32dd0a

  • SSDEEP

    1536:Yeeekm8zc8e1tVbsQvPkSJ4OpQqmkmOqmkmmkOmFLcmYqVNHzfVk4NIzO2oWVbr0:RhNRFWVbrzR7ITkP/foJtXw1l5kf

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 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\342f54347c50b2e65d24369150d0841558648f37a6f3a8ab7ac450d90e71803a.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:1728
    • 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:748
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1724
    • 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:1484
    • 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:1912

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/748-220-0x0000000000000000-mapping.dmp
  • memory/1484-221-0x0000000000000000-mapping.dmp
  • memory/1724-223-0x0000000000000000-mapping.dmp
  • memory/1728-57-0x000000007279D000-0x00000000727A8000-memory.dmp
    Filesize

    44KB

  • memory/1728-58-0x0000000075881000-0x0000000075883000-memory.dmp
    Filesize

    8KB

  • memory/1728-59-0x000000007279D000-0x00000000727A8000-memory.dmp
    Filesize

    44KB

  • memory/1728-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1728-55-0x00000000717B1000-0x00000000717B3000-memory.dmp
    Filesize

    8KB

  • memory/1728-54-0x000000002FC91000-0x000000002FC94000-memory.dmp
    Filesize

    12KB

  • memory/1728-384-0x000000006C9C1000-0x000000006C9C3000-memory.dmp
    Filesize

    8KB

  • memory/1728-385-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1728-386-0x000000007279D000-0x00000000727A8000-memory.dmp
    Filesize

    44KB

  • memory/1912-222-0x0000000000000000-mapping.dmp