Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    31/10/2024, 01:53

General

  • Target

    81f513aa3c6e025bede4da320fd6b62a439b0842f1a3a1d431c5eb8dae6dab0eN.exe

  • Size

    2.1MB

  • MD5

    a09c63aeaef0ae03625de194dcd24580

  • SHA1

    eb35af7b226368b5aa94fd0cef7108b4a4f9cf4f

  • SHA256

    81f513aa3c6e025bede4da320fd6b62a439b0842f1a3a1d431c5eb8dae6dab0e

  • SHA512

    e9a909fae732e802fd7e1b7f9a3f54ea703234093752ad09cc77368170555807e9fb7da669be8cd8ecc5bb6682053e76e396a4141e6d7b2fddc81334a84fc004

  • SSDEEP

    24576:hD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPj8/j7otSm/EVjlw3v:hp7E+QrFUBgq2pqw3v

Malware Config

Extracted

Family

remcos

Botnet

Host

C2

213.183.58.19:4000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    read.dat

  • keylog_flag

    false

  • keylog_folder

    CastC

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_sccafsoidz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Remcos family
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\81f513aa3c6e025bede4da320fd6b62a439b0842f1a3a1d431c5eb8dae6dab0eN.exe
    "C:\Users\Admin\AppData\Local\Temp\81f513aa3c6e025bede4da320fd6b62a439b0842f1a3a1d431c5eb8dae6dab0eN.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2660
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2724
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
        3⤵
        • Executes dropped EXE
        PID:1528

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          342B

          MD5

          c01e2beaf749cb3adf82fdc48f03a6ea

          SHA1

          55e7eccaeb91c3fd6fe11dada7b908fab873e908

          SHA256

          fd23f5aa5d36e9b4f682f5e235adf3216994f449b6f813060319757f819586c4

          SHA512

          18c587f0da748089ebdfe0dbadf28b5e01e1d9e49f7cec698bfba00a07bb5710bc8a5ef85c09e251bb9829e6d52cc468f9c8c456b95076ae090e5880671b30d5

        • C:\Users\Admin\AppData\Local\Temp\Cab1767.tmp

          Filesize

          70KB

          MD5

          49aebf8cbd62d92ac215b2923fb1b9f5

          SHA1

          1723be06719828dda65ad804298d0431f6aff976

          SHA256

          b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

          SHA512

          bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

        • \Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

          Filesize

          2.1MB

          MD5

          b34dbb6ed63233fe7ea5c0146a2b5c23

          SHA1

          31b625ea0c4c97145607dd8122645e8321071857

          SHA256

          febbd77a8822294f32112f2ae1fa0043453922de0317a531489bccc9047f3c10

          SHA512

          158da7d247fc9d181578f2df385b8f8e9d6ae63fdc9e648f89ebea898892e8739f6264d36f5e210ed24963d4e37fcce0fa70fed51a7e4bcb790952a64325fa69

        • memory/1528-47-0x0000000000080000-0x0000000000097000-memory.dmp

          Filesize

          92KB

        • memory/1528-48-0x0000000000080000-0x0000000000097000-memory.dmp

          Filesize

          92KB

        • memory/1528-51-0x0000000000080000-0x0000000000097000-memory.dmp

          Filesize

          92KB

        • memory/1528-50-0x0000000000080000-0x0000000000097000-memory.dmp

          Filesize

          92KB

        • memory/1528-52-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/1528-55-0x0000000000080000-0x0000000000097000-memory.dmp

          Filesize

          92KB

        • memory/1528-45-0x0000000000080000-0x0000000000097000-memory.dmp

          Filesize

          92KB

        • memory/2660-25-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2660-32-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2660-0-0x0000000074971000-0x0000000074972000-memory.dmp

          Filesize

          4KB

        • memory/2660-13-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2660-12-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2660-2-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2660-1-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2724-43-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2724-44-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2724-34-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2724-58-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB

        • memory/2724-33-0x0000000074970000-0x0000000074F1B000-memory.dmp

          Filesize

          5.7MB