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Analysis

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

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/10/2024, 13:28

General

  • Target

    file.exe

  • Size

    516KB

  • MD5

    b60c1b642765e2156730e910dbbed55a

  • SHA1

    e0bc18e19d753f1a09611416c8fea46d3453aac7

  • SHA256

    4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1

  • SHA512

    f9bca6ca4cf5f5f06faf58afa65e16897eabe40f981508d6225880d94a629675c834159a31cfaad28bf04003b949d8b054e5b8194b1211f8dc9cdfb9274f21d2

  • SSDEEP

    12288:7813Q9hg+AKfsc/5a+NCGO1UA/DEkINz3WSV/:78lQ96+YcAvwygNz31

Malware Config

Extracted

Family

remcos

Botnet

Rem_doc2

C2

107.173.4.16:2404

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-DSGECX

  • 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.

  • Detected Nirsoft tools 8 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 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.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -windowstyle hidden "$Enhedens=Get-Content -Raw 'C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\overcheaply.Dum';$Citronsommerfuglen=$Enhedens.SubString(7497,3);.$Citronsommerfuglen($Enhedens)"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3252
      • C:\Users\Admin\AppData\Local\Temp\unpastor.exe
        "C:\Users\Admin\AppData\Local\Temp\unpastor.exe"
        3⤵
        • Checks computer location settings
        • Loads dropped DLL
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:4680
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Lecythoid" /t REG_EXPAND_SZ /d "%Ajowan% -windowstyle 1 $schillingenes=(gp -Path 'HKCU:\Software\Careening\').Fremlejers;%Ajowan% ($schillingenes)"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2792
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Lecythoid" /t REG_EXPAND_SZ /d "%Ajowan% -windowstyle 1 $schillingenes=(gp -Path 'HKCU:\Software\Careening\').Fremlejers;%Ajowan% ($schillingenes)"
            5⤵
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:4892
        • C:\Users\Admin\AppData\Local\Temp\unpastor.exe
          C:\Users\Admin\AppData\Local\Temp\unpastor.exe /stext "C:\Users\Admin\AppData\Local\Temp\vcowndrhmzkzsvwkzeqxltckalkt"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:748
        • C:\Users\Admin\AppData\Local\Temp\unpastor.exe
          C:\Users\Admin\AppData\Local\Temp\unpastor.exe /stext "C:\Users\Admin\AppData\Local\Temp\xwtpovbjahcevjsoipdrwgptiscbxcyv"
          4⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:3420
        • C:\Users\Admin\AppData\Local\Temp\unpastor.exe
          C:\Users\Admin\AppData\Local\Temp\unpastor.exe /stext "C:\Users\Admin\AppData\Local\Temp\hzhz"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1996
  • 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=4452,i,15336851255456239337,16379811035920490645,262144 --variations-seed-version --mojo-platform-channel-handle=4612 /prefetch:8
    1⤵
      PID:228

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yoojnunv.sdf.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\unpastor.exe

      Filesize

      516KB

      MD5

      b60c1b642765e2156730e910dbbed55a

      SHA1

      e0bc18e19d753f1a09611416c8fea46d3453aac7

      SHA256

      4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1

      SHA512

      f9bca6ca4cf5f5f06faf58afa65e16897eabe40f981508d6225880d94a629675c834159a31cfaad28bf04003b949d8b054e5b8194b1211f8dc9cdfb9274f21d2

    • C:\Users\Admin\AppData\Local\Temp\vcowndrhmzkzsvwkzeqxltckalkt

      Filesize

      4KB

      MD5

      cda83eba5a004554ccdc061fd3df499c

      SHA1

      58ff2ecb9d47be10335e104896c87c62dc328523

      SHA256

      e384f4d46587646c6e0f9d2ee90b7bc57b49cea936b37cf8ab81ef3c4ce468ac

      SHA512

      f55ce20f0cf8b603fad765b889607f967c22d377fa4ac417ba1309d0aced9231e197bb4107d1c92bb99f51c04cc68ce26148727a8b694886710100c01f3de597

    • C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\Operationssygeplejerskers.Afh

      Filesize

      301KB

      MD5

      83a716c7db53f1bc1519863863f3ad03

      SHA1

      c4f3dc4f9db365a1ee5248ec55cff29bad1dab15

      SHA256

      ef637bbc6c96255229aba75d076a347e7a7d44a81b7464db30f8d3c081ba2116

      SHA512

      1b8f0fb20374c635fc19e982f0f4b51a096a3b60b2045dae475a20ac7d27be289ecf306714fa2ff8d9d1504ea359505f4376d0cf0ac5b2dd35d63116a5d8f817

    • C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\overcheaply.Dum

      Filesize

      54KB

      MD5

      5700ab6572287746a87ecdba691baf79

      SHA1

      5885062f3e65fe332bcf2077bc25323139e60b18

      SHA256

      e3916adcdcff1f166a6bcd0487b2d725131d275190459841dcd77d869e8f707a

      SHA512

      7a95bb5aee211653b556da9416709d418c77600c561ed7b5af11b559d5052170b2c93ef8e1c70e14536da01b6ac050f5feba81d04784f232cf54ad92db70b106

    • memory/748-99-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/748-88-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/748-78-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/748-86-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/748-111-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1996-96-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1996-97-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1996-91-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1996-100-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1996-102-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/3252-30-0x0000000007EA0000-0x0000000008444000-memory.dmp

      Filesize

      5.6MB

    • memory/3252-66-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-32-0x0000000008AD0000-0x000000000914A000-memory.dmp

      Filesize

      6.5MB

    • memory/3252-34-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-33-0x0000000007C90000-0x0000000007CC2000-memory.dmp

      Filesize

      200KB

    • memory/3252-35-0x000000006FC90000-0x000000006FCDC000-memory.dmp

      Filesize

      304KB

    • memory/3252-46-0x0000000007CD0000-0x0000000007CEE000-memory.dmp

      Filesize

      120KB

    • memory/3252-36-0x000000006FE10000-0x0000000070164000-memory.dmp

      Filesize

      3.3MB

    • memory/3252-47-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-48-0x0000000007D00000-0x0000000007DA3000-memory.dmp

      Filesize

      652KB

    • memory/3252-49-0x0000000007E10000-0x0000000007E1A000-memory.dmp

      Filesize

      40KB

    • memory/3252-52-0x0000000008590000-0x00000000085B4000-memory.dmp

      Filesize

      144KB

    • memory/3252-51-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-50-0x0000000007E50000-0x0000000007E7A000-memory.dmp

      Filesize

      168KB

    • memory/3252-53-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-55-0x000000007380E000-0x000000007380F000-memory.dmp

      Filesize

      4KB

    • memory/3252-56-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-57-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-29-0x0000000006DB0000-0x0000000006DD2000-memory.dmp

      Filesize

      136KB

    • memory/3252-59-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-60-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-61-0x0000000009150000-0x000000000A4E9000-memory.dmp

      Filesize

      19.6MB

    • memory/3252-62-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-63-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-64-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-7-0x000000007380E000-0x000000007380F000-memory.dmp

      Filesize

      4KB

    • memory/3252-67-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-69-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-28-0x0000000006D60000-0x0000000006D7A000-memory.dmp

      Filesize

      104KB

    • memory/3252-8-0x0000000002F30000-0x0000000002F66000-memory.dmp

      Filesize

      216KB

    • memory/3252-9-0x00000000059A0000-0x0000000005FC8000-memory.dmp

      Filesize

      6.2MB

    • memory/3252-27-0x0000000007820000-0x00000000078B6000-memory.dmp

      Filesize

      600KB

    • memory/3252-10-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-26-0x00000000068F0000-0x000000000693C000-memory.dmp

      Filesize

      304KB

    • memory/3252-25-0x0000000006850000-0x000000000686E000-memory.dmp

      Filesize

      120KB

    • memory/3252-24-0x0000000006260000-0x00000000065B4000-memory.dmp

      Filesize

      3.3MB

    • memory/3252-11-0x0000000073800000-0x0000000073FB0000-memory.dmp

      Filesize

      7.7MB

    • memory/3252-14-0x00000000061F0000-0x0000000006256000-memory.dmp

      Filesize

      408KB

    • memory/3252-13-0x0000000006180000-0x00000000061E6000-memory.dmp

      Filesize

      408KB

    • memory/3252-12-0x0000000005880000-0x00000000058A2000-memory.dmp

      Filesize

      136KB

    • memory/3420-87-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/3420-90-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/3420-81-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/3420-85-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/4680-98-0x00000000016C0000-0x0000000002A59000-memory.dmp

      Filesize

      19.6MB

    • memory/4680-73-0x0000000000460000-0x00000000016B4000-memory.dmp

      Filesize

      18.3MB

    • memory/4680-114-0x000000001F860000-0x000000001F879000-memory.dmp

      Filesize

      100KB

    • memory/4680-118-0x000000001F860000-0x000000001F879000-memory.dmp

      Filesize

      100KB

    • memory/4680-117-0x000000001F860000-0x000000001F879000-memory.dmp

      Filesize

      100KB

    • memory/4680-71-0x00000000016C0000-0x0000000002A59000-memory.dmp

      Filesize

      19.6MB