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Analysis

  • max time kernel
    140s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/12/2022, 02:44

General

  • Target

    f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b.dll

  • Size

    230KB

  • MD5

    f36e7778d529ef8705c6659aec39543c

  • SHA1

    1c016c36c77b824eb52f7a7e8e8b05fa678f326f

  • SHA256

    f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b

  • SHA512

    037abe2e6daf28e5694655d52a6edf68ea58720138269cb794f5f0cac1d773edd60b32b680e0f62e2506cc621dee33b2da76a2856f700abb1348ab575d28d8c9

  • SSDEEP

    1536:QiaVnouSu4CU7XZfjPcj/NMC2PhBRX99m+g9Vxm5dZZpQCLWGUGowkTEI/Q:VioFCUrJcj/uC2b9+x0Jq8uwkQII

Score
10/10

Malware Config

Signatures

  • Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Drops file in System32 directory 4 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1448
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b.dll,#1
      2⤵
      • Adds autorun key to be loaded by Explorer.exe on startup
      • Loads dropped DLL
      • Drops file in System32 directory
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1952

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\wfyye.dll

    Filesize

    478KB

    MD5

    e99416267b61f52fa5ab994019efd359

    SHA1

    86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

    SHA256

    768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

    SHA512

    0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

  • memory/1952-133-0x0000000002310000-0x0000000002352000-memory.dmp

    Filesize

    264KB

  • memory/1952-135-0x0000000002310000-0x0000000002352000-memory.dmp

    Filesize

    264KB

  • memory/1952-136-0x0000000002310000-0x0000000002352000-memory.dmp

    Filesize

    264KB