Analysis

  • max time kernel
    105s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    02-12-2022 15:34

General

  • Target

    422b9d537dc3f46750f5f3b7953b65cf28f2207004f215ea8b4d5a2134628d29.xls

  • Size

    88KB

  • MD5

    a7977e110156520f5c0fcf811f23fe21

  • SHA1

    5620352280c708c599a26887e125820581d1f01c

  • SHA256

    422b9d537dc3f46750f5f3b7953b65cf28f2207004f215ea8b4d5a2134628d29

  • SHA512

    0fb8c43972a5937bbe4d687ef09b283485fc255f90e2a67bb36039ab461051d5a912c525d6d27da611a2b5e5bbd388e6c5eb546a944896da205f1d9b871ba137

  • SSDEEP

    1536:kcuu+d/jbqKV6+Z5wqC7U8UdB1gxv7yZmspH7+cclKiEZClsQ6NqTBun5oXq3KO3:+B1gxv7yZmspH7+cclKisQ6NqTBun5oL

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\422b9d537dc3f46750f5f3b7953b65cf28f2207004f215ea8b4d5a2134628d29.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:1464
    • 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:472
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1768
    • 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:584
    • 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:1176

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/472-219-0x0000000000000000-mapping.dmp
  • memory/584-220-0x0000000000000000-mapping.dmp
  • memory/1176-221-0x0000000000000000-mapping.dmp
  • memory/1464-57-0x0000000071DED000-0x0000000071DF8000-memory.dmp
    Filesize

    44KB

  • memory/1464-58-0x0000000075B51000-0x0000000075B53000-memory.dmp
    Filesize

    8KB

  • memory/1464-54-0x000000002F191000-0x000000002F194000-memory.dmp
    Filesize

    12KB

  • memory/1464-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1464-55-0x0000000070E01000-0x0000000070E03000-memory.dmp
    Filesize

    8KB

  • memory/1464-383-0x000000006C011000-0x000000006C013000-memory.dmp
    Filesize

    8KB

  • memory/1464-384-0x0000000071DED000-0x0000000071DF8000-memory.dmp
    Filesize

    44KB

  • memory/1464-385-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1464-386-0x0000000071DED000-0x0000000071DF8000-memory.dmp
    Filesize

    44KB

  • memory/1768-222-0x0000000000000000-mapping.dmp