Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/04/2024, 15:42

General

  • Target
    $PLUGINSDIR/yhjjbtf.dll
  • Size 33KB
  • Sample240401-s5txaagf3x
  • SHA256 520857c7a5bfaeebf0f39504ae85d32b7e153774e93cb2be486f9a5d35b76d05
  • MD5 SHA1 SHA512 SSDEEP
Score
3/10

Malware Config

Signatures

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\yhjjbtf.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2816
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\yhjjbtf.dll,#1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2448
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\yhjjbtf.dll,#1
        3⤵
          PID:4900
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2448 -s 740
          3⤵
          • Program crash
          PID:4416
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2448 -ip 2448
      1⤵
        PID:2376

      Network

            MITRE ATT&CK Matrix

            Replay Monitor

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            Downloads

            memory/2448-0-0x0000000010000000-0x000000001000B000-memory.dmp