Analysis

  • max time kernel
    188s
  • max time network
    198s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    11-02-2023 02:21

General

  • Target

    5ffa4cb3f7db82c5db94ff5a288f132602383e285c9f110ba3b2eae848b2e946.xls

  • Size

    92KB

  • MD5

    c8d86480cae889d55896e2642369a5f1

  • SHA1

    5912e9a715533d5b9110daab4dbafe49236c8891

  • SHA256

    5ffa4cb3f7db82c5db94ff5a288f132602383e285c9f110ba3b2eae848b2e946

  • SHA512

    8b7182cdd30b1a95412bd847c30ff32e2493c5c445a0fcea12ce5801db7b3657a5230b328db66b44994c195862ffd7187acd972d771f8182e54b750563ef7714

  • SSDEEP

    1536:/Vk3hOdsylKlgxopeiBNhZFGzE+cL2kdApbCXuZH4gb4CEn9J4ZKnQxW:tk3hOdsylKlgxopeiBNhZFGzE+cL2kdH

Score
10/10

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

http://www.muyehuayi.com/cmp/8asA99KPsyA/v6lUsWbLen/

xlm40.dropper

http://concivilpa.com.py/wp-admin/i3CQu9dzDrMW/

xlm40.dropper

https://wijsneusmedia.nl/cgi-bin/kFB/

xlm40.dropper

http://www.angloextrema.com.br/assets/oEt1yYckHKlnNIq/

Signatures

  • Process spawned unexpected child process 4 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • 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 FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 28 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\5ffa4cb3f7db82c5db94ff5a288f132602383e285c9f110ba3b2eae848b2e946.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1208
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv1.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:316
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv2.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:1768
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv3.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:1200
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv4.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:1640

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/316-60-0x0000000000000000-mapping.dmp
  • memory/1200-64-0x0000000000000000-mapping.dmp
  • memory/1208-54-0x000000002F731000-0x000000002F734000-memory.dmp
    Filesize

    12KB

  • memory/1208-55-0x0000000071321000-0x0000000071323000-memory.dmp
    Filesize

    8KB

  • memory/1208-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1208-57-0x000000007230D000-0x0000000072318000-memory.dmp
    Filesize

    44KB

  • memory/1208-58-0x0000000075F51000-0x0000000075F53000-memory.dmp
    Filesize

    8KB

  • memory/1208-59-0x000000007230D000-0x0000000072318000-memory.dmp
    Filesize

    44KB

  • memory/1208-68-0x000000006C691000-0x000000006C693000-memory.dmp
    Filesize

    8KB

  • memory/1640-66-0x0000000000000000-mapping.dmp
  • memory/1768-62-0x0000000000000000-mapping.dmp