Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-11-2024 07:09

General

  • Target

    Bank Fund Transfer-589237.scr.exe

  • Size

    1.2MB

  • MD5

    552044ce92b78bf4b68d242c2c380afe

  • SHA1

    2ef4efa20f4fd0d05d8f49ccb22c9afeada93a62

  • SHA256

    cac29565b48f92e8c7a43b7dcca13294bae02890c26df75ae5e5ee31a464e4f3

  • SHA512

    4dc5ef0fb4b80a81015f4507422a67309074ea01787c9ed0d18c850a1d98ea1e3a444993a1d08428331e2ff044390c873d20c31ffbae049e325a82b64d5a3967

  • SSDEEP

    24576:6YdgfvzmIzxWOwxzCJYC3PPoKb0Eci5ihjJVxw9bYOd+8:qzmmWXRCaePPjb0Eci5ih7xw9bYI

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

212.162.149.226:9285

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    AppUpdate

  • 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-VCJ8ZS

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    AppUpdate

  • 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 4 IoCs

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

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 4 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 12 IoCs

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

  • Modifies registry class 1 IoCs
  • 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 27 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.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:4420
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:228
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uCItbEGgKu.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4312
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD9F5.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1960
    • C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe
      "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe"
      2⤵
        PID:4788
      • C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe
        "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe"
        2⤵
          PID:644
        • C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe
          "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe"
          2⤵
            PID:3024
          • C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe
            "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr.exe"
            2⤵
            • Checks computer location settings
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious use of WriteProcessMemory
            PID:4828
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
              3⤵
              • Checks computer location settings
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:3276
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\AppUpdate\remcos.exe"
                4⤵
                • System Location Discovery: System Language Discovery
                • Suspicious use of WriteProcessMemory
                PID:1540
                • C:\ProgramData\AppUpdate\remcos.exe
                  C:\ProgramData\AppUpdate\remcos.exe
                  5⤵
                  • 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:4320
                  • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\ProgramData\AppUpdate\remcos.exe"
                    6⤵
                    • Command and Scripting Interpreter: PowerShell
                    • System Location Discovery: System Language Discovery
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4832
                  • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uCItbEGgKu.exe"
                    6⤵
                    • Command and Scripting Interpreter: PowerShell
                    • System Location Discovery: System Language Discovery
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4432
                  • C:\Windows\SysWOW64\schtasks.exe
                    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp54C2.tmp"
                    6⤵
                    • System Location Discovery: System Language Discovery
                    • Scheduled Task/Job: Scheduled Task
                    PID:5048
                  • C:\ProgramData\AppUpdate\remcos.exe
                    "C:\ProgramData\AppUpdate\remcos.exe"
                    6⤵
                    • Executes dropped EXE
                    PID:4796
                  • C:\ProgramData\AppUpdate\remcos.exe
                    "C:\ProgramData\AppUpdate\remcos.exe"
                    6⤵
                    • Executes dropped EXE
                    PID:1944
                  • C:\ProgramData\AppUpdate\remcos.exe
                    "C:\ProgramData\AppUpdate\remcos.exe"
                    6⤵
                    • Executes dropped EXE
                    • Adds Run key to start application
                    • System Location Discovery: System Language Discovery
                    PID:4880

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\AppUpdate\remcos.exe

          Filesize

          1.2MB

          MD5

          552044ce92b78bf4b68d242c2c380afe

          SHA1

          2ef4efa20f4fd0d05d8f49ccb22c9afeada93a62

          SHA256

          cac29565b48f92e8c7a43b7dcca13294bae02890c26df75ae5e5ee31a464e4f3

          SHA512

          4dc5ef0fb4b80a81015f4507422a67309074ea01787c9ed0d18c850a1d98ea1e3a444993a1d08428331e2ff044390c873d20c31ffbae049e325a82b64d5a3967

        • 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

          24af7b9755d8c9a462166d9c0f25d636

          SHA1

          6284b09c15d482e6d0bf9188b3efe592eb782f08

          SHA256

          e87ebd8b203a2606f0ac975d86ba8b4c10fa7b6dded1d583c40e0f08ead94953

          SHA512

          97f813c304b83b00d7da8a4fdb253898cf36a67a15b0e04e994bd481f86fa1d30809a9114abfffc3d07ec06d4508940d8ec9749f4f95365392286408e96fb9d0

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

          Filesize

          18KB

          MD5

          819a1edde05a0b3cd3cfb02530ae76d7

          SHA1

          ebabf2027f0471a5200b7e7dc27ce835ac3d3f6f

          SHA256

          e1bbe61df7296cbbdc952f83fc7207315894c55152b610b5cacd0ff31ce559f5

          SHA512

          bf74d475adc6ee91b4ef88699564a97ae6f79c225a1a3f605fb4f1260cd63c09977f2f3edceda0fcbb4ef306be6a32c5d1ea1fe19c8f7bf81937ce5aba35dd76

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rxfbyxna.ipi.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

          Filesize

          392B

          MD5

          046708368578d720d91fb9ceecec742e

          SHA1

          1dc732f67f48a1d5694f4cf14a8d279dbd1d6ee6

          SHA256

          04f4edc28e97a16f93cf7acac864aba17cc467282550ae61baac719262be6f5e

          SHA512

          9106f645ee74c9e061fcb396a00d706512d41054a356125f26a10d42390d8f0d3ea3dd785393bf5de358b62464ec3c0f7d2e27411e87bb408581f820c427e7f0

        • C:\Users\Admin\AppData\Local\Temp\tmpD9F5.tmp

          Filesize

          1KB

          MD5

          f32f7158e177f9de980428f313cdfd36

          SHA1

          ef6fbd179c640b6f5d9f3e9cd7329980fb7a3d93

          SHA256

          38e7041a423ce9d7c5f4b9c9b81653339920a4fbcf172307c2d97f8700f29fa4

          SHA512

          75c049448897d1c975e728d837ad548aecd93ade17947de2ab1944ba6b4456d4f4f7120eadaf4a53fabde1e089388244b4d6a1759e3183e782d7ffa66f3a25a2

        • memory/228-57-0x0000000007440000-0x0000000007472000-memory.dmp

          Filesize

          200KB

        • memory/228-68-0x0000000006830000-0x000000000684E000-memory.dmp

          Filesize

          120KB

        • memory/228-73-0x0000000007800000-0x0000000007896000-memory.dmp

          Filesize

          600KB

        • memory/228-94-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/228-15-0x0000000004CA0000-0x0000000004CD6000-memory.dmp

          Filesize

          216KB

        • memory/228-17-0x0000000005310000-0x0000000005938000-memory.dmp

          Filesize

          6.2MB

        • memory/228-16-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/228-18-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/228-91-0x00000000078A0000-0x00000000078A8000-memory.dmp

          Filesize

          32KB

        • memory/228-90-0x00000000078C0000-0x00000000078DA000-memory.dmp

          Filesize

          104KB

        • memory/228-89-0x00000000077C0000-0x00000000077D4000-memory.dmp

          Filesize

          80KB

        • memory/228-21-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/228-88-0x00000000077B0000-0x00000000077BE000-memory.dmp

          Filesize

          56KB

        • memory/228-74-0x0000000007780000-0x0000000007791000-memory.dmp

          Filesize

          68KB

        • memory/228-72-0x0000000007600000-0x000000000760A000-memory.dmp

          Filesize

          40KB

        • memory/228-70-0x0000000007BD0000-0x000000000824A000-memory.dmp

          Filesize

          6.5MB

        • memory/228-71-0x0000000007580000-0x000000000759A000-memory.dmp

          Filesize

          104KB

        • memory/228-47-0x00000000067C0000-0x000000000680C000-memory.dmp

          Filesize

          304KB

        • memory/228-46-0x0000000006250000-0x000000000626E000-memory.dmp

          Filesize

          120KB

        • memory/228-58-0x0000000070330000-0x000000007037C000-memory.dmp

          Filesize

          304KB

        • memory/228-69-0x0000000007480000-0x0000000007523000-memory.dmp

          Filesize

          652KB

        • memory/4312-24-0x0000000005830000-0x0000000005896000-memory.dmp

          Filesize

          408KB

        • memory/4312-78-0x0000000070330000-0x000000007037C000-memory.dmp

          Filesize

          304KB

        • memory/4312-26-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4312-98-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4312-19-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4312-20-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4312-25-0x00000000058A0000-0x0000000005906000-memory.dmp

          Filesize

          408KB

        • memory/4312-27-0x0000000006260000-0x00000000065B4000-memory.dmp

          Filesize

          3.3MB

        • memory/4312-23-0x0000000005790000-0x00000000057B2000-memory.dmp

          Filesize

          136KB

        • memory/4320-99-0x00000000051F0000-0x0000000005202000-memory.dmp

          Filesize

          72KB

        • memory/4420-8-0x000000007534E000-0x000000007534F000-memory.dmp

          Filesize

          4KB

        • memory/4420-2-0x00000000054D0000-0x0000000005A74000-memory.dmp

          Filesize

          5.6MB

        • memory/4420-4-0x0000000004DD0000-0x0000000004DDA000-memory.dmp

          Filesize

          40KB

        • memory/4420-9-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4420-5-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4420-7-0x0000000004EA0000-0x0000000004EB2000-memory.dmp

          Filesize

          72KB

        • memory/4420-0-0x000000007534E000-0x000000007534F000-memory.dmp

          Filesize

          4KB

        • memory/4420-1-0x00000000003D0000-0x0000000000500000-memory.dmp

          Filesize

          1.2MB

        • memory/4420-10-0x00000000068D0000-0x0000000006990000-memory.dmp

          Filesize

          768KB

        • memory/4420-3-0x0000000004DF0000-0x0000000004E82000-memory.dmp

          Filesize

          584KB

        • memory/4420-53-0x0000000075340000-0x0000000075AF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4420-6-0x00000000050F0000-0x000000000518C000-memory.dmp

          Filesize

          624KB

        • memory/4432-111-0x0000000005AE0000-0x0000000005E34000-memory.dmp

          Filesize

          3.3MB

        • memory/4432-144-0x0000000073E10000-0x0000000073E5C000-memory.dmp

          Filesize

          304KB

        • memory/4828-49-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4828-48-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4832-154-0x0000000007540000-0x00000000075E3000-memory.dmp

          Filesize

          652KB

        • memory/4832-134-0x0000000073E10000-0x0000000073E5C000-memory.dmp

          Filesize

          304KB

        • memory/4832-158-0x0000000007880000-0x0000000007894000-memory.dmp

          Filesize

          80KB

        • memory/4832-157-0x0000000007840000-0x0000000007851000-memory.dmp

          Filesize

          68KB

        • memory/4832-130-0x0000000006350000-0x000000000639C000-memory.dmp

          Filesize

          304KB

        • memory/4880-133-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-128-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-129-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-156-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-132-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-131-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-126-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-162-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-163-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-164-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4880-165-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB