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Analysis

  • max time kernel
    147s
  • max time network
    162s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    11/02/2023, 02:22

General

  • Target

    434b81fd41ad827df4f81983828f43234278ccff8e5b13955200842d3a293ec0.xls

  • Size

    217KB

  • MD5

    0f91ec3735820b2bb1bf5b08716c4edb

  • SHA1

    91681fbec7a9e3aebf825cbc0034eb0777761783

  • SHA256

    434b81fd41ad827df4f81983828f43234278ccff8e5b13955200842d3a293ec0

  • SHA512

    99afb68db028567cfc0cad59d2d3ff4feffc4a3480c65d2200da2432f2b1df066187bbecc529bb45f88d2fc854d30b735850f34fefb0710f1eba9f0f559afefc

  • SSDEEP

    6144:HKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgByY+TAQXTHGUMEyP5p6f5jQmo:BbGUMVWlbo

Score
10/10

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

http://ftp.agir-santeinternationale.com/doctors/KAacngW97n4ApzVBDdGy/

xlm40.dropper

http://www.vinyz.com/admin3693/BDFFgAZ6zBRumcUSG/

xlm40.dropper

http://ly.yjlianyi.top/wp-admin/NRAdJ/

xlm40.dropper

http://www.muyehuayi.com/cmp/Vtm2m7z88g/

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 SetWindowsHookEx 3 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\434b81fd41ad827df4f81983828f43234278ccff8e5b13955200842d3a293ec0.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:904
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\oxnv1.ooccxx
      2⤵
      • Process spawned unexpected child process
      PID:1244
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\oxnv2.ooccxx
      2⤵
      • Process spawned unexpected child process
      PID:1728
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\oxnv3.ooccxx
      2⤵
      • Process spawned unexpected child process
      PID:112
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\oxnv4.ooccxx
      2⤵
      • Process spawned unexpected child process
      PID:1068

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/904-54-0x000000002F361000-0x000000002F364000-memory.dmp

    Filesize

    12KB

  • memory/904-55-0x0000000071321000-0x0000000071323000-memory.dmp

    Filesize

    8KB

  • memory/904-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/904-57-0x000000007230D000-0x0000000072318000-memory.dmp

    Filesize

    44KB

  • memory/904-58-0x0000000075661000-0x0000000075663000-memory.dmp

    Filesize

    8KB

  • memory/904-59-0x000000007230D000-0x0000000072318000-memory.dmp

    Filesize

    44KB