Analysis

  • max time kernel
    148s
  • max time network
    144s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    01-10-2022 07:27

General

  • Target

    269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950.exe

  • Size

    469KB

  • MD5

    a0c98858ea96edb2386c86e1786f3419

  • SHA1

    461ece495d357885b8ab78341374d830ad88cb76

  • SHA256

    269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950

  • SHA512

    0d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSvn9:uiLJbpI7I2WhQqZ7v9

Malware Config

Extracted

Family

remcos

Botnet

Firefox

C2

elew3le3lanle.freeddns.org:20309

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Firefox

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-Z26APQ

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Firefox

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 5 IoCs
  • Executes dropped EXE 4 IoCs
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950.exe
    "C:\Users\Admin\AppData\Local\Temp\269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950.exe"
    1⤵
    • Adds Run key to start application
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2584
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1976
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Firefox\remcos.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4052
        • C:\ProgramData\Firefox\remcos.exe
          C:\ProgramData\Firefox\remcos.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4928
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            5⤵
              PID:1208
            • C:\ProgramData\Firefox\remcos.exe
              C:\ProgramData\Firefox\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\iqhiolmogwsfhiwrottpcqcnshcmkg"
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:3732
            • C:\ProgramData\Firefox\remcos.exe
              C:\ProgramData\Firefox\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ksnbhewptekskotvxdgrmvxebwunlrypr"
              5⤵
              • Executes dropped EXE
              • Accesses Microsoft Outlook accounts
              PID:4368
            • C:\ProgramData\Firefox\remcos.exe
              C:\ProgramData\Firefox\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\vmsli"
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1940

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    1
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Firefox\remcos.exe
      Filesize

      469KB

      MD5

      a0c98858ea96edb2386c86e1786f3419

      SHA1

      461ece495d357885b8ab78341374d830ad88cb76

      SHA256

      269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950

      SHA512

      0d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb

    • C:\ProgramData\Firefox\remcos.exe
      Filesize

      469KB

      MD5

      a0c98858ea96edb2386c86e1786f3419

      SHA1

      461ece495d357885b8ab78341374d830ad88cb76

      SHA256

      269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950

      SHA512

      0d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb

    • C:\ProgramData\Firefox\remcos.exe
      Filesize

      469KB

      MD5

      a0c98858ea96edb2386c86e1786f3419

      SHA1

      461ece495d357885b8ab78341374d830ad88cb76

      SHA256

      269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950

      SHA512

      0d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb

    • C:\ProgramData\Firefox\remcos.exe
      Filesize

      469KB

      MD5

      a0c98858ea96edb2386c86e1786f3419

      SHA1

      461ece495d357885b8ab78341374d830ad88cb76

      SHA256

      269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950

      SHA512

      0d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb

    • C:\ProgramData\Firefox\remcos.exe
      Filesize

      469KB

      MD5

      a0c98858ea96edb2386c86e1786f3419

      SHA1

      461ece495d357885b8ab78341374d830ad88cb76

      SHA256

      269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950

      SHA512

      0d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb

    • C:\Users\Admin\AppData\Local\Temp\install.vbs
      Filesize

      628B

      MD5

      e2e11b2470ab8c4c1369eb7130cca472

      SHA1

      3c71d0adb20c66d75f9e260a14b08f4b71c34ebf

      SHA256

      b517f1e97cf1292efd37a185eb9ce42178c743472cb583d7a850f3120cf6d76e

      SHA512

      c67841341c3d710af9059e7a5cf63b203fc0336e7a554a3211e72fe632664adfd7ad2899a47c7f052842a428dc213a873bd40e4fd5ad38c4499369e3eccea030

    • C:\Users\Admin\AppData\Local\Temp\iqhiolmogwsfhiwrottpcqcnshcmkg
      Filesize

      4KB

      MD5

      9f8131a06cce5763da558a7a80474089

      SHA1

      f4e4c7a1e2e833ea63383479f952f7ea4da1b827

      SHA256

      c7d4ccec594fb7d70edaac07f06927e39c651baa89a2116ee4d2b69dc0d9353b

      SHA512

      f841e39b5d724a16afea3ed8e849eec3dc72444aafaf20a65c48a7bb9c4bb8362241d1b692255f3742a7631478b465453a8cce4ae6ecdbe63d48e40f0293cc8b

    • memory/1208-367-0x0000000002A90000-0x0000000002B0F000-memory.dmp
      Filesize

      508KB

    • memory/1208-288-0x0000000002AC27A4-mapping.dmp
    • memory/1940-485-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/1940-378-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/1940-354-0x0000000000422206-mapping.dmp
    • memory/1976-181-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-180-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-166-0x0000000000000000-mapping.dmp
    • memory/1976-179-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-178-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-177-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-176-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-175-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-174-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-173-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-172-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-171-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-170-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-169-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-168-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/1976-167-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-138-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-137-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-147-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-149-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-150-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-151-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-152-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-154-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-153-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-148-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-155-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-156-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-157-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-158-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-159-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-160-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-161-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-162-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-163-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-164-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-165-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-145-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-144-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-143-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-142-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-141-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-140-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-139-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-117-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-146-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-136-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-135-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-134-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-133-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-132-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-131-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-130-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-129-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-118-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-119-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-128-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-127-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-126-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-120-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-125-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-121-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-124-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-123-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-122-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/3732-346-0x0000000000476274-mapping.dmp
    • memory/3732-370-0x0000000000400000-0x0000000000478000-memory.dmp
      Filesize

      480KB

    • memory/3732-460-0x0000000000400000-0x0000000000478000-memory.dmp
      Filesize

      480KB

    • memory/3732-497-0x0000000000400000-0x0000000000478000-memory.dmp
      Filesize

      480KB

    • memory/4052-233-0x0000000000000000-mapping.dmp
    • memory/4368-349-0x0000000000455238-mapping.dmp
    • memory/4368-374-0x0000000000400000-0x0000000000457000-memory.dmp
      Filesize

      348KB

    • memory/4368-457-0x0000000000400000-0x0000000000457000-memory.dmp
      Filesize

      348KB

    • memory/4368-482-0x0000000000400000-0x0000000000457000-memory.dmp
      Filesize

      348KB

    • memory/4928-246-0x0000000000000000-mapping.dmp