Analysis

  • max time kernel
    149s
  • 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
    21-03-2024 02:42

General

  • Target

    ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe

  • Size

    1.3MB

  • MD5

    44aaef046aa99bfb6520d7b0b1fb758b

  • SHA1

    d9649c6a5eb45805ad1d21cca7bd3f05830c5235

  • SHA256

    ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350

  • SHA512

    919fb01b986172932e5d3f042450489535f9def2273a4f95c701306d44bbe2f6aea36a064366b3b5043b85f5b4b1b562c89e594bb3ba631081df889553f2c740

  • SSDEEP

    24576:EJWUid5kZHYX+fEHxniHBvag2ZCMVAgfM:EJ05aYt4dcsMVAgfM

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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 17 IoCs
  • 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 FindShellTrayWindow 30 IoCs
  • Suspicious use of SendNotifyMessage 30 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe
    "C:\Users\Admin\AppData\Local\Temp\ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4672
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c mkdir "\\?\C:\Windows "
      2⤵
        PID:4700
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows \System32"
        2⤵
          PID:2020
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c "C:\Windows \System32\6060419.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1772
          • C:\Windows \System32\6060419.exe
            "C:\Windows \System32\6060419.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:5080
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:440
              • 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:4880
                • 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:3556
        • C:\Windows\SysWOW64\extrac32.exe
          C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe C:\\Users\\Public\\Libraries\\Wcbdytqr.PIF
          2⤵
            PID:3016
          • C:\Windows\SysWOW64\SndVol.exe
            C:\Windows\System32\SndVol.exe
            2⤵
            • Suspicious use of SetWindowsHookEx
            PID:1892

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          cbc5c78f7d2e0af849acab7c5be83ba9

          SHA1

          5176fe40145716e7c7f6a18d84b3ae7ff0fab7e5

          SHA256

          dfd4d038d3546a9a7f73df5aad9fbc5c4f89ca28c435724d90323085192a646d

          SHA512

          3eaaf582be4d18577b255faa03f52fc7636b21a7aeb1b0c510256e25399d446d6e81e7d0e34ba0240ebbe95df874266b1968841e68eda1245d5db5b76d82f646

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pphowp0x.kcc.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Windows \System32\6060419.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/1892-54-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-51-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-80-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-73-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-72-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-65-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-64-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-57-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-56-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-50-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-41-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-43-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-44-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-45-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-46-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-47-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/1892-49-0x0000000000A40000-0x0000000001A40000-memory.dmp

          Filesize

          16.0MB

        • memory/3556-31-0x00000212471B0000-0x00000212471C0000-memory.dmp

          Filesize

          64KB

        • memory/3556-34-0x00007FFE8ACB0000-0x00007FFE8B771000-memory.dmp

          Filesize

          10.8MB

        • memory/3556-30-0x00000212471B0000-0x00000212471C0000-memory.dmp

          Filesize

          64KB

        • memory/3556-29-0x00007FFE8ACB0000-0x00007FFE8B771000-memory.dmp

          Filesize

          10.8MB

        • memory/3556-21-0x00000212470F0000-0x0000021247112000-memory.dmp

          Filesize

          136KB

        • memory/4672-0-0x00000000025A0000-0x00000000025A1000-memory.dmp

          Filesize

          4KB

        • memory/4672-1-0x00000000040D0000-0x00000000050D0000-memory.dmp

          Filesize

          16.0MB

        • memory/4672-2-0x00000000040D0000-0x00000000050D0000-memory.dmp

          Filesize

          16.0MB

        • memory/4672-18-0x00000000025A0000-0x00000000025A1000-memory.dmp

          Filesize

          4KB

        • memory/4672-4-0x0000000000400000-0x0000000000551000-memory.dmp

          Filesize

          1.3MB

        • memory/5080-16-0x00000000613C0000-0x00000000613E3000-memory.dmp

          Filesize

          140KB