Analysis

  • max time kernel
    148s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-08-2024 05:54

General

  • Target

    remcos_a.exe

  • Size

    483KB

  • MD5

    5b2027af10b3d0fb8fc1a5aca4fe2884

  • SHA1

    cd342301a2db8ba6bb540a7c3d1ab8491974991c

  • SHA256

    1aa8e0e39ef44f0906f9f8036df2eff25f53c985a22b24c4f8ac994c3cd5e6d2

  • SHA512

    1beb46efcad6bbacfd9daf3359609f502aecd8a546477d50b0de38ac161fcad7bcb1540fd6375a2adcbe0fdd21ca291a140847ed01f83942730996b8fc816413

  • SSDEEP

    6144:QTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrLT4:QTlrYw1RUh3NFn+N5WfIQIjbs/ZBIT4

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.168.1.252:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-K3NAY7

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Suspicious use of SetThreadContext 2 IoCs
  • 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 2 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
    "C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4672
    • \??\c:\program files (x86)\internet explorer\iexplore.exe
      "c:\program files (x86)\internet explorer\iexplore.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5056
      • C:\Windows\SysWOW64\svchost.exe
        svchost.exe
        3⤵
          PID:3532

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      ce9409567a06261b3844a8ff356b6944

      SHA1

      999a145ccf64d78ed1d267d54399777cebda30eb

      SHA256

      a32df2593438506f117f1a396866a3972b34fb242f7f2eb773594ba158d27ea1

      SHA512

      864626a34c900ce6bdda07e6a8db630b24fa9157e0098f1ef6db661a8181d657cc37144b74fc22f12fcf5b9be442544f64b73e22e15a976ce620ba11362ea297

    • memory/3532-13-0x0000000000C00000-0x0000000000C82000-memory.dmp

      Filesize

      520KB

    • memory/3532-14-0x0000000000C00000-0x0000000000C82000-memory.dmp

      Filesize

      520KB

    • memory/3532-12-0x0000000000C00000-0x0000000000C82000-memory.dmp

      Filesize

      520KB

    • memory/3532-11-0x0000000000C00000-0x0000000000C82000-memory.dmp

      Filesize

      520KB

    • memory/5056-20-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-1-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-2-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-9-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-10-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-3-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-19-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-0-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-21-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-6-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-26-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-27-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-32-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-34-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-39-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-40-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-45-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-46-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-52-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB

    • memory/5056-53-0x0000000000C40000-0x0000000000CC2000-memory.dmp

      Filesize

      520KB