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Analysis

  • max time kernel
    131s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    14/09/2023, 07:43

General

  • Target

    hk1c9y18em.dll

  • Size

    1.1MB

  • MD5

    b7c42a2f6443f7efb2f005b05040a40a

  • SHA1

    66e3ecc673fbb77c697a3b178a7458617de3d227

  • SHA256

    8e04a2048e545d0faaf5d1e1c995c7b9529751e378b75c41f80c6682bd84e5aa

  • SHA512

    fb802bb1fbffdadc38d0bf373a868deaa03a701d079715f3261f68e7c8f77881134f4bc8154bc68b8688d2f3711e6a6c382f0e64929c9bd1715ff2aee2b49aef

  • SSDEEP

    24576:E40kaG+iDe5cMQW7v7+KIUC/ofj1fpLgN:E40kd+35cMv

Score
10/10

Malware Config

Extracted

Family

bumblebee

Botnet

js1

rc4.plain

Signatures

  • BumbleBee

    BumbleBee is a webshell malware written in C++.

  • Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\hk1c9y18em.dll
    1⤵
    • Suspicious use of NtCreateThreadExHideFromDebugger
    PID:2812
  • C:\Windows\system32\verclsid.exe
    "C:\Windows\system32\verclsid.exe" /S /C {0B2C9183-C9FA-4C53-AE21-C900B0C39965} /I {0C733A8A-2A1C-11CE-ADE5-00AA0044773D} /X 0x401
    1⤵
      PID:2496
    • C:\Windows\system32\cmd.exe
      "cmd.exe" /s /k pushd "C:\Users\Admin\AppData\Local\Temp"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:2592
      • C:\Windows\system32\rundll32.exe
        rundll32 hk1c9y18em.dll,DllRegisterServer
        2⤵
        • Suspicious use of NtCreateThreadExHideFromDebugger
        PID:2968

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2812-0-0x0000000001DB0000-0x0000000001E29000-memory.dmp

      Filesize

      484KB

    • memory/2812-1-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2812-2-0x0000000001F40000-0x000000000204A000-memory.dmp

      Filesize

      1.0MB

    • memory/2812-3-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2812-5-0x0000000001F40000-0x000000000204A000-memory.dmp

      Filesize

      1.0MB

    • memory/2812-6-0x0000000001F40000-0x000000000204A000-memory.dmp

      Filesize

      1.0MB

    • memory/2812-7-0x0000000001DB0000-0x0000000001E29000-memory.dmp

      Filesize

      484KB

    • memory/2812-8-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-10-0x0000000001FC0000-0x00000000020CA000-memory.dmp

      Filesize

      1.0MB

    • memory/2968-11-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-12-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-13-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-9-0x00000000003B0000-0x0000000000429000-memory.dmp

      Filesize

      484KB

    • memory/2968-14-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-15-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-16-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-17-0x0000000077030000-0x00000000771D9000-memory.dmp

      Filesize

      1.7MB

    • memory/2968-18-0x00000000003B0000-0x0000000000429000-memory.dmp

      Filesize

      484KB