Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    21-05-2024 14:44

General

  • Target

    Cheat.exe

  • Size

    65KB

  • MD5

    596bb1dd5ae0ac50a9218910d193d4cf

  • SHA1

    377563b67e5601266d711345f78df4a7d95cad27

  • SHA256

    2018fc40b0faeb1ddd7406ec68677a55164633ee245966a07688329459f6da7d

  • SHA512

    b543f966b174f59384e0579935ae194bff479576007ef966c7bf1a3e3f256e9686383c21f5c239df9e28970106f7770b09fbb498400b7a26cc981a37a9555299

  • SSDEEP

    1536:fj+u2LoN36tcQviFw1A+HIBnvbLfLteF3nLrB9z3nUaF9b6S9vM:fj+uIoN36tcQviFC9oBnnfWl9zkaF9bC

Malware Config

Extracted

Family

njrat

Version

Platinum

Botnet

njRat

C2

127.0.0.1:21679

Mutex

HDAudio.exe

Attributes
  • reg_key

    HDAudio.exe

  • splitter

    |Ghost|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Drops startup file 3 IoCs
  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Cheat.exe
    "C:\Users\Admin\AppData\Local\Temp\Cheat.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\HDAudio.exe
      "C:\Windows\HDAudio.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2568
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /delete /tn "RealtekHDAudio" /f
        3⤵
          PID:2576
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /sc minute /mo 1 /tn "RealtekHDAudio" /tr C:\Windows\HDAudio.exe
          3⤵
          • Creates scheduled task(s)
          PID:2388
    • C:\Windows\system32\taskeng.exe
      taskeng.exe {B1F4211E-5EE2-4C0F-BF7B-85AD5A1086CB} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:2384
      • C:\Windows\HDAudio.exe
        C:\Windows\HDAudio.exe
        2⤵
        • Executes dropped EXE
        PID:2460
      • C:\Windows\HDAudio.exe
        C:\Windows\HDAudio.exe
        2⤵
        • Executes dropped EXE
        PID:2628
      • C:\Windows\HDAudio.exe
        C:\Windows\HDAudio.exe
        2⤵
        • Executes dropped EXE
        PID:1544

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\HDAudio.exe

      Filesize

      65KB

      MD5

      596bb1dd5ae0ac50a9218910d193d4cf

      SHA1

      377563b67e5601266d711345f78df4a7d95cad27

      SHA256

      2018fc40b0faeb1ddd7406ec68677a55164633ee245966a07688329459f6da7d

      SHA512

      b543f966b174f59384e0579935ae194bff479576007ef966c7bf1a3e3f256e9686383c21f5c239df9e28970106f7770b09fbb498400b7a26cc981a37a9555299

    • memory/2568-9-0x0000000074170000-0x000000007471B000-memory.dmp

      Filesize

      5.7MB

    • memory/2568-14-0x0000000074170000-0x000000007471B000-memory.dmp

      Filesize

      5.7MB

    • memory/2568-16-0x0000000074170000-0x000000007471B000-memory.dmp

      Filesize

      5.7MB

    • memory/2568-17-0x0000000074170000-0x000000007471B000-memory.dmp

      Filesize

      5.7MB

    • memory/2916-2-0x0000000074170000-0x000000007471B000-memory.dmp

      Filesize

      5.7MB

    • memory/2916-1-0x0000000074170000-0x000000007471B000-memory.dmp

      Filesize

      5.7MB

    • memory/2916-0-0x0000000074171000-0x0000000074172000-memory.dmp

      Filesize

      4KB

    • memory/2916-10-0x0000000074170000-0x000000007471B000-memory.dmp

      Filesize

      5.7MB