Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/08/2024, 19:55

General

  • Target
    d7816ba6ddda0c4e833d9bba85864de6b1bd289246fcedae84b8a6581db3f5b6.msi
  • Size 14.0MB
  • Sample240815-ynmdrs1bqd
  • SHA256 d7816ba6ddda0c4e833d9bba85864de6b1bd289246fcedae84b8a6581db3f5b6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 45.133.74.183:2404

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

    true

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-1QFIL0

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 8 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 21 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\d7816ba6ddda0c4e833d9bba85864de6b1bd289246fcedae84b8a6581db3f5b6.msi
    1⤵
    • Blocklisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1244
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3820
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2152
      • C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Coolmuster PDF Image Extractor.exe
        "C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Coolmuster PDF Image Extractor.exe"
        2⤵
        • Adds Run key to start application
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2092
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Coolmuster PDF Image Extractor.exe"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4568
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Coolmuster PDF Image Extractor.exe"
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2612
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:2112

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e57e3aa.rbs

          • Path C:\Config.Msi\e57e3aa.rbs
          • Size 23KB
          • SHA256 718f533c0a0caf83ac37e070016fefef6258891efacf5fa4f285a360add0fbcf
          • MD5 SHA1 SHA512 SSDEEP

          logs.dat

          • Path C:\ProgramData\remcos\logs.dat
          • Size 184B
          • SHA256 2224d1b43a8c4e300cd8a507335f8645ca8986488e649c502e7d6086b4edc881
          • MD5 SHA1 SHA512

          Coolmuster PDF Image Extractor.exe

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Coolmuster PDF Image Extractor.exe
          • Size 607KB
          • SHA256 c7030fb23fd25fc99c39457618a3afd2b27b381d7b833d4662995493d85deaf4
          • MD5 SHA1 SHA512 SSDEEP

          Error.raw

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Error.raw
          • Size 482KB
          • SHA256 05d59eb6a94e12226dc71d0b3700a69318066841485bcdc92879967db7d7d2f8
          • MD5 SHA1 SHA512 SSDEEP

          ImageUtility.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\ImageUtility.dll
          • Size 484KB
          • SHA256 1e1526e44f06f2d3f2518e4f81f3ae08eceb48a8c5fb361f9eb4489798bd62a0
          • MD5 SHA1 SHA512 SSDEEP

          Module.Helper.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Module.Helper.dll
          • Size 63KB
          • SHA256 ccaf204af80f66a2254cfc8d37b4665fd158ca51ac60febef89af3683f2a65f5
          • MD5 SHA1 SHA512 SSDEEP

          Module.View.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Module.View.dll
          • Size 212KB
          • SHA256 6b1002b04d0334d6afcf28147918df5f284c016da605bdc36f4f2c5806950316
          • MD5 SHA1 SHA512 SSDEEP

          Unrar.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\Unrar.dll
          • Size 647KB
          • SHA256 0982b342033c4715024d6baf4c9b8ec11354e68913684e9ddd1b9730dbf3693d
          • MD5 SHA1 SHA512 SSDEEP

          temp.wav

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\containers\temp.wav
          • Size 2.9MB
          • SHA256 ae6688f5cbd92c00035cc9858743c11326a3024c5b733d3795fa052e15f1474b
          • MD5 SHA1 SHA512 SSDEEP

          curl-ca-bundle.crt

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\curl-ca-bundle.crt
          • Size 216KB
          • SHA256 313d562594ebd07846ad6b840dd18993f22e0f8b3f275d9aacfae118f4f00fb7
          • MD5 SHA1 SHA512 SSDEEP

          groceryc.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\groceryc.dll
          • Size 368KB
          • SHA256 74c9d82bebeaaecb50001ff0b1ee6ea129fc9de3c6a673d29d3e12615b75b3c0
          • MD5 SHA1 SHA512 SSDEEP

          libBasic.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libBasic.dll
          • Size 241KB
          • SHA256 f490db01d8a604117856ff993726456b6d3aa087b017c8cbc5ed1b917cd4df57
          • MD5 SHA1 SHA512 SSDEEP

          libI18n.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libI18n.dll
          • Size 25KB
          • SHA256 33e177db21f3f21b7d8cbe0d87e92042f3e45f892491046a26fba1e989e2c38e
          • MD5 SHA1 SHA512 SSDEEP

          libRG.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libRG.dll
          • Size 55KB
          • SHA256 17927ae7a1e834dd150c5c26e21f68dfa6404a813dfe1a1c33d0dad446ba3489
          • MD5 SHA1 SHA512 SSDEEP

          libUpdate.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libUpdate.dll
          • Size 64KB
          • SHA256 be195001a8b43dda8f6193623133e51d378e08094e5ab8f29174a35299eb4e57
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libcrypto-1_1.dll
          • Size 2.3MB
          • SHA256 1a4ef4224d094e512cf7a21eb7ade8a36c0028aebbdf292f34ea6fe752793cd0
          • MD5 SHA1 SHA512 SSDEEP

          libcurl.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libcurl.dll
          • Size 1.1MB
          • SHA256 6e158f098213773ee2ab91c1f02ab39fbe2896947c9dfcf762aee10662a8bcd8
          • MD5 SHA1 SHA512 SSDEEP

          libdrive.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libdrive.dll
          • Size 7.3MB
          • SHA256 2a2b4cd5722f251c56ae5b7ac7671bb423b229ee30089e8723bd942aed0bf36e
          • MD5 SHA1 SHA512 SSDEEP

          libexpat.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libexpat.dll
          • Size 127KB
          • SHA256 cd4f37c1c978f6c7b38ae44b25f0c1dbe40f1b6cf626a08947d5808d7e34a086
          • MD5 SHA1 SHA512 SSDEEP

          libglog.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libglog.dll
          • Size 136KB
          • SHA256 84a73bc173a30b2d174a66637bd075bd2c01e48e4fd97ed032dcafb2c8c0dea3
          • MD5 SHA1 SHA512 SSDEEP

          libssl-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libssl-1_1.dll
          • Size 502KB
          • SHA256 a384deb5f6c8517852b0fa4832a373c37881855faf1ffce5b7b49ea866371393
          • MD5 SHA1 SHA512 SSDEEP

          libxml2-2.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\libxml2-2.dll
          • Size 3.5MB
          • SHA256 f52724ae696b5c9e2586fd41047e6ac56541efdfc157a33ba20ad5826234bf53
          • MD5 SHA1 SHA512 SSDEEP

          license_En.txt

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\license_En.txt
          • Size 9KB
          • SHA256 edb62536c5c814b5c66977e8cd08316f4596f6c5acc11c195a697831ed7f42a2
          • MD5 SHA1 SHA512 SSDEEP

          msvcp140.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\msvcp140.dll
          • Size 439KB
          • SHA256 5136a49a682ac8d7f1ce71b211de8688fce42ed57210af087a8e2dbc8a934062
          • MD5 SHA1 SHA512 SSDEEP

          pthreadGC2.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\pthreadGC2.dll
          • Size 117KB
          • SHA256 3b159da9dad9afd4bd28b5b1a53dc502a2487068055ed8c30136a76cd6924890
          • MD5 SHA1 SHA512 SSDEEP

          vcruntime140.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\vcruntime140.dll
          • Size 78KB
          • SHA256 8934aaeb65b6e6d253dfe72dea5d65856bd871e989d5d3a2a35edfe867bb4825
          • MD5 SHA1 SHA512 SSDEEP

          zlib1.dll

          • Path C:\Users\Admin\AppData\Local\Programs\Network MPluginManager\zlib1.dll
          • Size 101KB
          • SHA256 3310ca85f0cb26e07bb3d8e1168c49e572a7c50762fa8140768663a5df9823e9
          • MD5 SHA1 SHA512 SSDEEP

          __PSScriptPolicyTest_vdvapobw.1xo.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vdvapobw.1xo.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          e57e3a9.msi

          • Path C:\Windows\Installer\e57e3a9.msi
          • Size 14.0MB
          • SHA256 d7816ba6ddda0c4e833d9bba85864de6b1bd289246fcedae84b8a6581db3f5b6
          • MD5 SHA1 SHA512 SSDEEP

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 23.7MB
          • SHA256 2ce78e1d78e040aaa5b65aae33bcdc8f25e1f7587ccb1438977aa622528484d3
          • MD5 SHA1 SHA512 SSDEEP

          {7568b94f-51e7-44d5-946c-16cb303bc45e}_OnDiskSnapshotProp

          • Path \??\Volume{fa35ad82-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{7568b94f-51e7-44d5-946c-16cb303bc45e}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 eb4faa45fc729f2a737d2ce92a23e3582064c96b0bcfcbb3594baea99f26721e
          • MD5 SHA1 SHA512 SSDEEP

          memory/2092-194-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-152-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-167-0x0000000062E80000-0x0000000062EA2000-memory.dmp

          memory/2092-168-0x0000000062480000-0x00000000624A5000-memory.dmp

          memory/2092-169-0x0000000070F40000-0x00000000712A4000-memory.dmp

          memory/2092-172-0x0000000074220000-0x0000000074478000-memory.dmp

          memory/2092-171-0x0000000074480000-0x0000000074504000-memory.dmp

          memory/2092-170-0x0000000074540000-0x0000000074661000-memory.dmp

          memory/2092-192-0x0000000006EB0000-0x0000000006F38000-memory.dmp

          memory/2092-162-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-197-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-193-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-190-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-200-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-205-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-204-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-201-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-198-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-185-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-207-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-206-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-208-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-210-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-221-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-220-0x0000000006C30000-0x0000000006CB0000-memory.dmp

          memory/2092-160-0x0000000005BE0000-0x0000000005D39000-memory.dmp

          memory/2092-258-0x0000000073340000-0x00000000733BB000-memory.dmp

          memory/2092-151-0x0000000073340000-0x00000000733BB000-memory.dmp

          memory/2612-292-0x0000000006A50000-0x0000000006A6E000-memory.dmp

          memory/2612-293-0x00000000076B0000-0x0000000007753000-memory.dmp

          memory/2612-267-0x0000000005D40000-0x0000000005DA6000-memory.dmp

          memory/2612-268-0x0000000005DB0000-0x0000000005E16000-memory.dmp

          memory/2612-263-0x0000000002E40000-0x0000000002E76000-memory.dmp

          memory/2612-278-0x0000000005E20000-0x0000000006174000-memory.dmp

          memory/2612-279-0x0000000006420000-0x000000000643E000-memory.dmp

          memory/2612-280-0x0000000006450000-0x000000000649C000-memory.dmp

          memory/2612-281-0x00000000069E0000-0x0000000006A12000-memory.dmp

          memory/2612-282-0x000000006DCE0000-0x000000006DD2C000-memory.dmp

          memory/2612-266-0x0000000005570000-0x0000000005592000-memory.dmp

          memory/2612-294-0x0000000007DE0000-0x000000000845A000-memory.dmp

          memory/2612-265-0x0000000005620000-0x0000000005C48000-memory.dmp

          memory/2612-295-0x0000000007480000-0x000000000749A000-memory.dmp

          memory/2612-296-0x00000000077C0000-0x00000000077CA000-memory.dmp

          memory/2612-303-0x00000000079B0000-0x0000000007A46000-memory.dmp

          memory/2612-304-0x0000000007940000-0x0000000007951000-memory.dmp

          memory/2612-305-0x0000000007970000-0x000000000797E000-memory.dmp

          memory/2612-306-0x0000000007980000-0x0000000007994000-memory.dmp

          memory/2612-307-0x0000000007A70000-0x0000000007A8A000-memory.dmp

          memory/2612-308-0x0000000007A60000-0x0000000007A68000-memory.dmp