Analysis

  • max time kernel
    155s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-03-2024 07:04

General

  • Target

    Quotation .exe

  • Size

    888KB

  • MD5

    cf659feea0c1c9e0a1705e076b831f48

  • SHA1

    4e79ae9003d92a10d09fdb231512ca914c60a7c7

  • SHA256

    b9c144592964694742c93d09a6db9194a58cfed85c9a81f00b5ae2d14ac5c87d

  • SHA512

    6ebf5d751d94772def751a6085e233e8cadb0c4c29193be247d0b11c977370ae82a2d5190bae463b0de60cbe8bf0c2c7a4b0dd84f9c2fd142e7ededc42afdfc4

  • SSDEEP

    12288:oXxu5oy0XhL9ljnp9zIO6S33Ys1fCjPfeCMVAgfMCf3e9:ohAcXhL9lV9cHSY2ZCMVAgfM

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:47212

officerem.duckdns.org:47212

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-I8N3XG

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • ModiLoader Second Stage 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Quotation .exe
    "C:\Users\Admin\AppData\Local\Temp\Quotation .exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4928
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c mkdir "\\?\C:\Windows "
      2⤵
        PID:2648
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows \System32"
        2⤵
          PID:3628
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c "C:\Windows \System32\1844701.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3888
          • C:\Windows \System32\1844701.exe
            "C:\Windows \System32\1844701.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:2916
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:5004
              • C:\Windows\system32\cmd.exe
                cmd /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:2288
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                  6⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3372
        • C:\Windows\SysWOW64\extrac32.exe
          C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\Quotation .exe C:\\Users\\Public\\Libraries\\Hmbaewme.PIF
          2⤵
            PID:2892
          • C:\Windows\SysWOW64\SndVol.exe
            C:\Windows\System32\SndVol.exe
            2⤵
            • Suspicious use of SetWindowsHookEx
            PID:2196
        • 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 --no-appcompat-clear --mojo-platform-channel-handle=3804 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
          1⤵
            PID:2716

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\remcos\logs.dat

            Filesize

            144B

            MD5

            19152c3cde06d62fc0bcb5f39a66718a

            SHA1

            aedd17fbd3a3f0e89e35e3bb0d49e9a19e3572d2

            SHA256

            f3a966181b0b3b88dc8da5160c383213e001d7e654e0c87304592bad5d762d8f

            SHA512

            0e6be00215cbb8d9ee67f3bef8959c0f6bdd0d94fe5455b8d3bbdd693c99a20ad75f72ba3c34bdd69192e9c706bbd0c063a26fbf20d28f92feec42ba5c4407e6

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ja5usvrf.m5x.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • C:\Windows \System32\1844701.exe

            Filesize

            128KB

            MD5

            231ce1e1d7d98b44371ffff407d68b59

            SHA1

            25510d0f6353dbf0c9f72fc880de7585e34b28ff

            SHA256

            30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

            SHA512

            520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

          • C:\Windows \System32\netutils.dll

            Filesize

            112KB

            MD5

            fa7aa88417d0c48807144a1a48fe3fbc

            SHA1

            6f5ec990b12d4a6075050a94e0d68d03781fa46d

            SHA256

            2019dcd18ba7d5554a4a9da882740aa883941670af3de9396960081a0f8aa098

            SHA512

            99b2eb6f8e7d00a3803cba229149e5e0cb67a3deb607782c55fbacd25d9c074cce83759de15490eff939d5ad98f26cdbd44395cc79ffe22753e16c3d9e3b5fff

          • C:\windows \system32\KDECO.bat

            Filesize

            11KB

            MD5

            c545650595b479c81ad6b9d8882aae39

            SHA1

            7a98aa2e6eee23b3c1bba876955d525bc618b3f0

            SHA256

            a3a80983cb33159f0455fa0135789402558baa1460db94d0071318512b8cb5f9

            SHA512

            85ac596a7da9072a28c4178e4fdedc98f1b49c8e3fe5612cfe464833297b13f65d2dc59b52d7fc9970cff8f98d954111229aec0ed9dded454e03b0cf4ebb6ff3

          • memory/2196-59-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-49-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-58-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-66-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-67-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-74-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-52-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-44-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-48-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-46-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-45-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-40-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-42-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2196-43-0x0000000000A00000-0x0000000001A00000-memory.dmp

            Filesize

            16.0MB

          • memory/2916-17-0x00000000613C0000-0x00000000613E3000-memory.dmp

            Filesize

            140KB

          • memory/3372-36-0x00007FFD74E10000-0x00007FFD758D1000-memory.dmp

            Filesize

            10.8MB

          • memory/3372-33-0x000001C3DF8A0000-0x000001C3DF8B0000-memory.dmp

            Filesize

            64KB

          • memory/3372-31-0x000001C3DF8A0000-0x000001C3DF8B0000-memory.dmp

            Filesize

            64KB

          • memory/3372-32-0x000001C3DF8A0000-0x000001C3DF8B0000-memory.dmp

            Filesize

            64KB

          • memory/3372-29-0x00007FFD74E10000-0x00007FFD758D1000-memory.dmp

            Filesize

            10.8MB

          • memory/3372-21-0x000001C3DFA20000-0x000001C3DFA42000-memory.dmp

            Filesize

            136KB

          • memory/4928-0-0x00000000023E0000-0x00000000023E1000-memory.dmp

            Filesize

            4KB

          • memory/4928-6-0x00000000023E0000-0x00000000023E1000-memory.dmp

            Filesize

            4KB

          • memory/4928-4-0x0000000000400000-0x00000000004E8000-memory.dmp

            Filesize

            928KB

          • memory/4928-2-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4928-1-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB