Analysis

  • max time kernel
    29s
  • max time network
    27s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-01-2025 04:46

General

  • Target

    c582b5864a67c2d63f8d3a8faf08b47e94646a96cd81abe507d8d08df13e40c4.exe

  • Size

    2.3MB

  • MD5

    426f94c2250dfc1e6e796bfbe81bef0b

  • SHA1

    802296f4944a765d71c2b969df549b2fe561819a

  • SHA256

    c582b5864a67c2d63f8d3a8faf08b47e94646a96cd81abe507d8d08df13e40c4

  • SHA512

    a55b376f0b50a4d3e44c50960034192e90a51b24746ece5ca2b74d8571f30a5ad8420cf29d9ea435dfd4d946322d0d3ff33750c6439a5b094871a7ceb334644c

  • SSDEEP

    49152:Mh+ZkldoPK1Xav4aWGh+ZkldoPK1XadtV+XcM:d2cPK1daWf2cPK1RV

Malware Config

Extracted

Family

remcos

Version

2.4.5 Pro

Botnet

RIA

C2

2ffahbg8eydhr96hx3x2lje2ymygt5iq.duckdns.org:4431

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    3

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remhost

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Remkqdjqsdguhsqgdfjqguhjfgcujqsdfgujhqsgdufh,sqhjdgdhjqsgdhjqghgsdhsqjgdj545d4564d64d64dqs4dq645q4s-57XAU6

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    wikipedia;solitaire;

Signatures

  • Njrat family
  • Remcos

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

  • Remcos family
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 2 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c582b5864a67c2d63f8d3a8faf08b47e94646a96cd81abe507d8d08df13e40c4.exe
    "C:\Users\Admin\AppData\Local\Temp\c582b5864a67c2d63f8d3a8faf08b47e94646a96cd81abe507d8d08df13e40c4.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4500
    • C:\Users\Admin\AppData\Local\Temp\LastFudCy.exe
      "C:\Users\Admin\AppData\Local\Temp\LastFudCy.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:3632
      • C:\Users\Admin\AppData\Local\Temp\LastFudCy.exe
        "C:\Users\Admin\AppData\Local\Temp\LastFudCy.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3292
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2088
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:1760

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\LastFudCy.exe

      Filesize

      1.3MB

      MD5

      0a236522a4053835ac2093099e535fcb

      SHA1

      3f039b58ff3db3f597cff65e9dcaa80b15fee28c

      SHA256

      1ea5ebe3eac08648aa427c9a864e9c98407366981c6547281e134573c86074d7

      SHA512

      2972be7422a82030e9dde987233cd1d1db8516c28c410c8c03d38acb68d9783a5bd6aa93f182129b0830223523b95633c1f3eee9869bd779bbd7b8de2ff9472f

    • memory/2088-64-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-185-0x0000000073A30000-0x0000000073FE1000-memory.dmp

      Filesize

      5.7MB

    • memory/2088-29-0x0000000073A30000-0x0000000073FE1000-memory.dmp

      Filesize

      5.7MB

    • memory/2088-30-0x0000000073A30000-0x0000000073FE1000-memory.dmp

      Filesize

      5.7MB

    • memory/2088-50-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-89-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-86-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-63-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-85-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-84-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-82-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-83-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-81-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-80-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-79-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-78-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-77-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-75-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-76-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-74-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-73-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-72-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-71-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-70-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-69-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-68-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-67-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-66-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-65-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-22-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-60-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-28-0x0000000073A32000-0x0000000073A33000-memory.dmp

      Filesize

      4KB

    • memory/2088-87-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-59-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-58-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-57-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-56-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-54-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-53-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-52-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-51-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-49-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-48-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-47-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-46-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-45-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-44-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-88-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-62-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-186-0x0000000073A30000-0x0000000073FE1000-memory.dmp

      Filesize

      5.7MB

    • memory/2088-61-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-55-0x0000000000600000-0x0000000000632000-memory.dmp

      Filesize

      200KB

    • memory/2088-184-0x0000000073A32000-0x0000000073A33000-memory.dmp

      Filesize

      4KB

    • memory/3292-40-0x0000000000400000-0x0000000000425000-memory.dmp

      Filesize

      148KB

    • memory/3292-38-0x0000000000400000-0x0000000000425000-memory.dmp

      Filesize

      148KB

    • memory/3292-43-0x0000000000400000-0x0000000000425000-memory.dmp

      Filesize

      148KB

    • memory/3292-39-0x0000000000400000-0x0000000000425000-memory.dmp

      Filesize

      148KB

    • memory/3292-31-0x0000000000400000-0x0000000000425000-memory.dmp

      Filesize

      148KB

    • memory/3632-188-0x0000000001000000-0x0000000001001000-memory.dmp

      Filesize

      4KB

    • memory/4500-21-0x00000000023C0000-0x00000000023C1000-memory.dmp

      Filesize

      4KB

    • memory/4500-183-0x00000000023C0000-0x00000000023C1000-memory.dmp

      Filesize

      4KB