Analysis

  • max time kernel
    151s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-03-2024 12:31

General

  • Target

    Document.exe

  • Size

    1.2MB

  • MD5

    e652224389478e9294591e8bf638f9a6

  • SHA1

    33126d714dbcba65b9006472be89092cb54fa826

  • SHA256

    88c21447120abe15f0da3d0ce1dfa63e1c5e4ef52415ed177728cd229507eb83

  • SHA512

    e7e835cfa4e8aba53a1271ef849b9f3c22fe2339089f4624e42cafae014853d41d690437af21aed42477cbd432aa8229d05a20468b68e5286661e6433802756c

  • SSDEEP

    24576:LI7PgJ/Of9JIIB1jf2kH2E4NGGtPlq09Vb2aBPqK5WDpiCEKfF2V2CKKKKKKKKK5:LdJPK2kH2h3t0qVb2aBPqK5WDpifAlC4

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\Document.exe
    "C:\Users\Admin\AppData\Local\Temp\Document.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4992
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c mkdir "\\?\C:\Windows "
      2⤵
        PID:440
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows \System32"
        2⤵
          PID:3944
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c "C:\Windows \System32\370964.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4784
          • C:\Windows \System32\370964.exe
            "C:\Windows \System32\370964.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:1004
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:3952
              • 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:1720
                • 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:912
        • C:\Windows\SysWOW64\extrac32.exe
          C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\Document.exe C:\\Users\\Public\\Libraries\\Ejuqejhd.PIF
          2⤵
            PID:3368
          • C:\Windows\SysWOW64\colorcpl.exe
            C:\Windows\System32\colorcpl.exe
            2⤵
            • Suspicious use of SetWindowsHookEx
            PID:5072

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          add3e1275be6a1c9967f429ce66f7853

          SHA1

          a709f50bc9b3ecde6fd11c7cf21402bc17f39093

          SHA256

          f8d238d0144640879d27c96e5c9d312ec082b21e08ae49de47d588320ccf8abe

          SHA512

          63d25be297cc62bfc6c69adca6bc1b50da199fccac761f991c0eac0b5aa04d2be12179e0a242fa2fac07109b33e13e340acd907ae5517dc20c769da55d0e0f3b

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hlpl3kvu.rw1.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Windows \System32\370964.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/912-18-0x000002BC1C690000-0x000002BC1C6B2000-memory.dmp

          Filesize

          136KB

        • memory/912-29-0x000002BC1A510000-0x000002BC1A520000-memory.dmp

          Filesize

          64KB

        • memory/912-33-0x00007FF9B4A40000-0x00007FF9B5501000-memory.dmp

          Filesize

          10.8MB

        • memory/912-30-0x000002BC1A510000-0x000002BC1A520000-memory.dmp

          Filesize

          64KB

        • memory/912-28-0x00007FF9B4A40000-0x00007FF9B5501000-memory.dmp

          Filesize

          10.8MB

        • memory/1004-16-0x00000000613C0000-0x00000000613E3000-memory.dmp

          Filesize

          140KB

        • memory/4992-1-0x0000000002A70000-0x0000000003A70000-memory.dmp

          Filesize

          16.0MB

        • memory/4992-2-0x0000000002A70000-0x0000000003A70000-memory.dmp

          Filesize

          16.0MB

        • memory/4992-0-0x0000000002330000-0x0000000002331000-memory.dmp

          Filesize

          4KB

        • memory/4992-4-0x0000000000400000-0x000000000053C000-memory.dmp

          Filesize

          1.2MB

        • memory/5072-50-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-40-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-44-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-45-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-46-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-48-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-49-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-42-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-52-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-43-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-57-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-58-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-65-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-66-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-73-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-74-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-81-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/5072-82-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB