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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    22/11/2024, 17:43

General

  • Target

    c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe

  • Size

    908KB

  • MD5

    1cb86400147c835af58017f0474c5bcc

  • SHA1

    ac285cb623bf292341068dead954cfed9a1f8c81

  • SHA256

    c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61

  • SHA512

    ce74f39d092b13570f9387e5d43ced748dea9557e8887fc072694a2cf448b2c4cf741db3e76d551ebef3511b906ae1cbe0fe670f8968e51d1441982ec73b9b0c

  • SSDEEP

    24576:Nqho7Y33wd4D5N4UmVFruPkMKXbY31qKblvh:y1Hwd4FN4UoFqjKXboTp5

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

206.189.218.238:4782

206.189.218.238:2286

206.189.218.238:3363

206.189.218.238:3386

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-NJK093

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Remcos family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe
    "C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2440
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mWrixkEbVc.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2576
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mWrixkEbVc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBFC6.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2568
    • C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe
      "C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2544
      • C:\ProgramData\Remcos\remcos.exe
        "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • 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:532
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mWrixkEbVc.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1940
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mWrixkEbVc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2BD1.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1140
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:1424
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:1760
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:1796

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    df731cd00d7a9ac4689a4329aa0aad2d

    SHA1

    efad781f5f84e6f0bce4f9a9676ab7987a34817f

    SHA256

    0325750528488af226860bed80e3fdd503c23ed23bce2779f1304845515ec9be

    SHA512

    ccf56acbc6a4e451d77afac2419662869a0cfbf348a3aaa2f73bb9af52c51c49fff3e53cad214f4ae8ffe61a6eba2f137298ded2be30b3e203d587aa9f7048fe

  • C:\ProgramData\Remcos\remcos.exe

    Filesize

    908KB

    MD5

    1cb86400147c835af58017f0474c5bcc

    SHA1

    ac285cb623bf292341068dead954cfed9a1f8c81

    SHA256

    c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61

    SHA512

    ce74f39d092b13570f9387e5d43ced748dea9557e8887fc072694a2cf448b2c4cf741db3e76d551ebef3511b906ae1cbe0fe670f8968e51d1441982ec73b9b0c

  • C:\Users\Admin\AppData\Local\Temp\tmpBFC6.tmp

    Filesize

    1KB

    MD5

    17158e13f626ccd6e464b01e08e19f70

    SHA1

    21571bae1525c0407e4464506a27e2722cf95e98

    SHA256

    49888d694368f46e9c028940a1f1444d1aaec6e76c7c1f6a430c5f030697ce2b

    SHA512

    ccdc2568cc69a3ccc34ad95d766f9606b27f88900120d98f06f21931146246288229b5ec88d4b588eea6e42a044298e06a9adbf5d21eb82f2ee42a68b6ef06ac

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\3LTMKA87WZYJB3399USZ.temp

    Filesize

    7KB

    MD5

    a5d63d13d41097c0c509a4df51212323

    SHA1

    14870391941d075b6da295927541a313cb6105e4

    SHA256

    d37971180897652a1fbc3e127bc62562147e9535bf70d529afcc226cb2740c46

    SHA512

    a127e91754043cb12fb6a975df1792e692ea9a9aae654a2a01493a3b57d2301f0b0aceb767cd432c50b42fb406164ab81160c6ac4c4a373d3c05b65f9db59559

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    f3584a82ab5eebbba42786863d7c4f7d

    SHA1

    ff04f35b024ad1b053fa6e7e7126e3f6ac11f7c0

    SHA256

    be64dfa1a2e3ca3f5d4d5d6eba237c58eb23f372433eb4769c346d4517e18818

    SHA512

    f05e44e9a01b442b9e20d6677302a6b154e2043c0657b3b773ffaee43f8e5cd54cc81ee76da6e59bc0f27d1547a0cd820b6edfa7d151a03663ec7547e90622d6

  • memory/532-38-0x00000000000A0000-0x000000000018A000-memory.dmp

    Filesize

    936KB

  • memory/1796-81-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-74-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-75-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-100-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-94-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-87-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-70-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-69-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1796-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1796-101-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2440-4-0x0000000074420000-0x0000000074B0E000-memory.dmp

    Filesize

    6.9MB

  • memory/2440-5-0x0000000005C30000-0x0000000005CF4000-memory.dmp

    Filesize

    784KB

  • memory/2440-31-0x0000000074420000-0x0000000074B0E000-memory.dmp

    Filesize

    6.9MB

  • memory/2440-0-0x000000007442E000-0x000000007442F000-memory.dmp

    Filesize

    4KB

  • memory/2440-3-0x0000000000390000-0x00000000003A2000-memory.dmp

    Filesize

    72KB

  • memory/2440-2-0x0000000074420000-0x0000000074B0E000-memory.dmp

    Filesize

    6.9MB

  • memory/2440-1-0x0000000001010000-0x00000000010FA000-memory.dmp

    Filesize

    936KB

  • memory/2544-16-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-17-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-19-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-23-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-25-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-29-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2544-28-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-13-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2544-11-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB