Analysis

  • max time kernel
    118s
  • max time network
    113s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-12-2024 15:39

General

  • Target

    RFQ-00948-STELLION-878378.exe

  • Size

    1.1MB

  • MD5

    7d78937ebc3648958437741df13eec52

  • SHA1

    9b30169d5adb06c082d6b9e297368faad45725f5

  • SHA256

    ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

  • SHA512

    7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

  • SSDEEP

    24576:PYoOciJwQYaoRuivChV3DSwctuoqBMY9zVZEueHTf:PsbwQIRssqBMWVZEu

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.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 3 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 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1848
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:452
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD09E.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3260
    • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
      "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
      2⤵
        PID:3568
      • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
        "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
        2⤵
          PID:2856
        • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
          "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
          2⤵
          • Checks computer location settings
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4428
          • C:\ProgramData\Remcos\remcos.exe
            "C:\ProgramData\Remcos\remcos.exe"
            3⤵
            • Checks computer location settings
            • 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:1088
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1328
            • C:\Windows\SysWOW64\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2390.tmp"
              4⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:3832
            • C:\ProgramData\Remcos\remcos.exe
              "C:\ProgramData\Remcos\remcos.exe"
              4⤵
              • Executes dropped EXE
              PID:3256
            • 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:2796

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\Remcos\logs.dat

        Filesize

        144B

        MD5

        fafb7125b67f15147952c38e35c0013a

        SHA1

        58dbd58196f8369b9874f9dda07601b0daef520b

        SHA256

        e88442164a9f5a0b548f386f2e2fc654c8b4841405bb09e0abb357cd6c6f5dbc

        SHA512

        e16d516936fc99b788eb848f6e83b51a6d732251d7c20293781f09caa44b74b6ede3c514ebbec015ad8088023d9172904bdccfd8c1112c746eb756963e81414b

      • C:\ProgramData\Remcos\remcos.exe

        Filesize

        1.1MB

        MD5

        7d78937ebc3648958437741df13eec52

        SHA1

        9b30169d5adb06c082d6b9e297368faad45725f5

        SHA256

        ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

        SHA512

        7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        968cb9309758126772781b83adb8a28f

        SHA1

        8da30e71accf186b2ba11da1797cf67f8f78b47c

        SHA256

        92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

        SHA512

        4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        18KB

        MD5

        c28129ce6ec604a34f1b1832c1348b25

        SHA1

        fb4b35bac0efb53f527d1cd9522f1c664a3843fd

        SHA256

        e919bd028480eba46435aed05ad4fcb3150c0d59675bc8967cb789ea7fbdaea1

        SHA512

        d55c4aaaf3e085e270c1bfcba3c59bc536d800dc2d382891651f79c8d23e10605c8e64bf1e07f8b4f2b78aa6b305d6da8d6cfa2c8a23d8203e34e41d4f814b8a

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bhzdivwu.opd.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\tmpD09E.tmp

        Filesize

        1KB

        MD5

        84da63e22d3d6c3a66e7a9eb7298e31e

        SHA1

        278ae2aeaeb7c272189f9115f8aa29550a677863

        SHA256

        9a85e8e7bec7a8c21ebb39729eceea6c44713b32b7176aecf79771ceb42e14d7

        SHA512

        f8ddc8c2860d7f8c2a98780b119012800b943a8c90f37322ccba16fc838686b37c727d2cdbe6dbc8b3abe8944a787da40f6bca39f403398dddcaf287cfee0882

      • memory/452-22-0x00000000052F0000-0x0000000005356000-memory.dmp

        Filesize

        408KB

      • memory/452-54-0x0000000006040000-0x0000000006072000-memory.dmp

        Filesize

        200KB

      • memory/452-65-0x0000000006020000-0x000000000603E000-memory.dmp

        Filesize

        120KB

      • memory/452-68-0x0000000006D90000-0x0000000006DAA000-memory.dmp

        Filesize

        104KB

      • memory/452-67-0x00000000073E0000-0x0000000007A5A000-memory.dmp

        Filesize

        6.5MB

      • memory/452-15-0x00000000044A0000-0x00000000044D6000-memory.dmp

        Filesize

        216KB

      • memory/452-16-0x0000000074860000-0x0000000075010000-memory.dmp

        Filesize

        7.7MB

      • memory/452-17-0x0000000004BD0000-0x00000000051F8000-memory.dmp

        Filesize

        6.2MB

      • memory/452-18-0x0000000074860000-0x0000000075010000-memory.dmp

        Filesize

        7.7MB

      • memory/452-75-0x00000000070B0000-0x00000000070B8000-memory.dmp

        Filesize

        32KB

      • memory/452-19-0x0000000074860000-0x0000000075010000-memory.dmp

        Filesize

        7.7MB

      • memory/452-21-0x0000000004BA0000-0x0000000004BC2000-memory.dmp

        Filesize

        136KB

      • memory/452-23-0x0000000005410000-0x0000000005476000-memory.dmp

        Filesize

        408KB

      • memory/452-70-0x0000000007010000-0x00000000070A6000-memory.dmp

        Filesize

        600KB

      • memory/452-33-0x0000000005490000-0x00000000057E4000-memory.dmp

        Filesize

        3.3MB

      • memory/452-52-0x0000000005A70000-0x0000000005A8E000-memory.dmp

        Filesize

        120KB

      • memory/452-55-0x0000000071050000-0x000000007109C000-memory.dmp

        Filesize

        304KB

      • memory/452-78-0x0000000074860000-0x0000000075010000-memory.dmp

        Filesize

        7.7MB

      • memory/452-66-0x0000000006C70000-0x0000000006D13000-memory.dmp

        Filesize

        652KB

      • memory/452-74-0x00000000070D0000-0x00000000070EA000-memory.dmp

        Filesize

        104KB

      • memory/452-73-0x0000000006FD0000-0x0000000006FE4000-memory.dmp

        Filesize

        80KB

      • memory/452-72-0x0000000006FC0000-0x0000000006FCE000-memory.dmp

        Filesize

        56KB

      • memory/452-69-0x0000000006E00000-0x0000000006E0A000-memory.dmp

        Filesize

        40KB

      • memory/452-53-0x0000000005B00000-0x0000000005B4C000-memory.dmp

        Filesize

        304KB

      • memory/452-71-0x0000000006F90000-0x0000000006FA1000-memory.dmp

        Filesize

        68KB

      • memory/1328-96-0x00000000057D0000-0x0000000005B24000-memory.dmp

        Filesize

        3.3MB

      • memory/1328-105-0x0000000005E80000-0x0000000005ECC000-memory.dmp

        Filesize

        304KB

      • memory/1328-106-0x0000000075110000-0x000000007515C000-memory.dmp

        Filesize

        304KB

      • memory/1328-116-0x0000000007080000-0x0000000007123000-memory.dmp

        Filesize

        652KB

      • memory/1328-117-0x0000000007370000-0x0000000007381000-memory.dmp

        Filesize

        68KB

      • memory/1328-118-0x00000000073A0000-0x00000000073B4000-memory.dmp

        Filesize

        80KB

      • memory/1848-3-0x00000000053E0000-0x0000000005472000-memory.dmp

        Filesize

        584KB

      • memory/1848-2-0x0000000005990000-0x0000000005F34000-memory.dmp

        Filesize

        5.6MB

      • memory/1848-0-0x000000007486E000-0x000000007486F000-memory.dmp

        Filesize

        4KB

      • memory/1848-8-0x0000000074860000-0x0000000075010000-memory.dmp

        Filesize

        7.7MB

      • memory/1848-4-0x0000000074860000-0x0000000075010000-memory.dmp

        Filesize

        7.7MB

      • memory/1848-40-0x0000000074860000-0x0000000075010000-memory.dmp

        Filesize

        7.7MB

      • memory/1848-5-0x0000000005380000-0x000000000538A000-memory.dmp

        Filesize

        40KB

      • memory/1848-9-0x0000000006C10000-0x0000000006CD4000-memory.dmp

        Filesize

        784KB

      • memory/1848-7-0x000000007486E000-0x000000007486F000-memory.dmp

        Filesize

        4KB

      • memory/1848-10-0x000000000A5E0000-0x000000000A67C000-memory.dmp

        Filesize

        624KB

      • memory/1848-6-0x0000000005940000-0x000000000595C000-memory.dmp

        Filesize

        112KB

      • memory/1848-1-0x0000000000870000-0x000000000098C000-memory.dmp

        Filesize

        1.1MB

      • memory/2796-90-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2796-85-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2796-86-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2796-97-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2796-124-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2796-130-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2796-138-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4428-31-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4428-29-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4428-39-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4428-36-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4428-51-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB