Analysis

  • max time kernel
    70s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    14/11/2022, 01:53

General

  • Target
    Bazar.xlsb
  • Size 289KB
  • Sample221114-ca7lwsec37
  • SHA256 32b9ed5ed7f0adfc8f39a6300e4fe0831a60c2b4e4631a4d6f7e96ee2b9ff40f
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
upx

Malware Config

Extracted

Language
  • xlm4.0

Source

Signatures

  • Process spawned unexpected child process 1 IoCs

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

  • ACProtect 1.3x - 1.4x DLL software 2 IoCs

    Detects file using ACProtect software.

  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 1 IoCs
  • 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 15 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\Bazar.xlsb
    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:900
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c certutil -decode %PUBLIC%\105011.oop %PUBLIC%\105011.gof && rundll32 %PUBLIC%\105011.gof,DF1
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:300
      • C:\Windows\SysWOW64\certutil.exe
        certutil -decode C:\Users\Public\105011.oop C:\Users\Public\105011.gof
        3⤵
          PID:1796
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32 C:\Users\Public\105011.gof,DF1
          3⤵
          • Loads dropped DLL
          PID:896

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          105011.gof

          • Path C:\Users\Public\105011.gof
          • Size 102KB
          • SHA256 47b1f63e7db1c24ad6f692cf1eb0e92dd6de27a16051f390f5b441afc5049fea
          • MD5 SHA1 SHA512 SSDEEP

          105011.oop

          • Path C:\Users\Public\105011.oop
          • Size 137KB
          • SHA256 48bc2ff4d55dfc60659213fbbc1543d7f4eed7feda54c5013be9f88668f87737
          • MD5 SHA1 SHA512 SSDEEP

          105011.gof

          • Path \Users\Public\105011.gof
          • Size 102KB
          • SHA256 47b1f63e7db1c24ad6f692cf1eb0e92dd6de27a16051f390f5b441afc5049fea
          • MD5 SHA1 SHA512 SSDEEP

          memory/896-69-0x000000006C7F0000-0x000000006C823000-memory.dmp

          memory/896-67-0x000000006C7F0000-0x000000006C823000-memory.dmp

          memory/900-57-0x00000000762D1000-0x00000000762D3000-memory.dmp

          memory/900-58-0x000000007234D000-0x0000000072358000-memory.dmp

          memory/900-54-0x000000002FE01000-0x000000002FE04000-memory.dmp

          memory/900-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

          memory/900-68-0x000000007234D000-0x0000000072358000-memory.dmp

          memory/900-55-0x0000000071361000-0x0000000071363000-memory.dmp