Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-03-2024 02:12

General

  • Target

    373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe

  • Size

    1.1MB

  • MD5

    7f9d54f2643b695c21d8fb560e72106a

  • SHA1

    ecc78cd91c127a66929642ff7c901c17f5e55952

  • SHA256

    373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3

  • SHA512

    b3c6797b6ca2ee33ccb907af9eae5e0b609030f24baed60f6776c2bf14aab58a1bff70c6218f3297198e9382ce4aa020ae9484bd00ee2ea25a446bb9e85a102b

  • SSDEEP

    24576:llAinAzO5SRz+HJ0dkGdiNhp/BRaR6URr0GDp6eL:llAc5StANPpRaR6URrNp

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) 22 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe
    "C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1380
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c mkdir "\\?\C:\Windows "
      2⤵
        PID:1708
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows \System32"
        2⤵
          PID:4624
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c "C:\Windows \System32\2226800.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4832
          • C:\Windows \System32\2226800.exe
            "C:\Windows \System32\2226800.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:740
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:2256
              • 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:4388
                • 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:2036
        • C:\Windows\SysWOW64\extrac32.exe
          C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\\Users\\Public\\Libraries\\Qbijgrcm.PIF
          2⤵
            PID:3936
          • C:\Windows\SysWOW64\colorcpl.exe
            C:\Windows\System32\colorcpl.exe
            2⤵
            • Suspicious use of SetWindowsHookEx
            PID:2040

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          4eef9168ab508697d5d0d3ef05e6785e

          SHA1

          09491cb90fc57aba262324f8a4c7fcb0faf4d516

          SHA256

          4ff242c76ea1e366416d8b1206cef73be86c753303783f8002a83a49994101c8

          SHA512

          046ce2b98b34c903bcde3c10fcd1a906aa2b090cbe2905a79e040d84e14bfe4107765518bc129e58aa2fc189e45bc21c8d12fd19990848f88f13cc3d8e71dc3e

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2vyp501p.elz.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Windows \System32\2226800.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/740-15-0x00000000613C0000-0x00000000613E3000-memory.dmp

          Filesize

          140KB

        • memory/1380-35-0x0000000000740000-0x0000000000741000-memory.dmp

          Filesize

          4KB

        • memory/1380-0-0x0000000000740000-0x0000000000741000-memory.dmp

          Filesize

          4KB

        • memory/1380-2-0x0000000004070000-0x0000000005070000-memory.dmp

          Filesize

          16.0MB

        • memory/1380-4-0x0000000000400000-0x0000000000527000-memory.dmp

          Filesize

          1.2MB

        • memory/1380-1-0x0000000004070000-0x0000000005070000-memory.dmp

          Filesize

          16.0MB

        • memory/2036-17-0x000001B2B5A50000-0x000001B2B5A72000-memory.dmp

          Filesize

          136KB

        • memory/2036-30-0x000001B2B5AB0000-0x000001B2B5AC0000-memory.dmp

          Filesize

          64KB

        • memory/2036-31-0x000001B2B5AB0000-0x000001B2B5AC0000-memory.dmp

          Filesize

          64KB

        • memory/2036-34-0x00007FFD3DA90000-0x00007FFD3E551000-memory.dmp

          Filesize

          10.8MB

        • memory/2036-29-0x000001B2B5AB0000-0x000001B2B5AC0000-memory.dmp

          Filesize

          64KB

        • memory/2036-27-0x00007FFD3DA90000-0x00007FFD3E551000-memory.dmp

          Filesize

          10.8MB

        • memory/2040-45-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-64-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-46-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-47-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-48-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-51-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-52-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-54-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-56-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-42-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-62-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-44-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-65-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-67-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-68-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-69-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-73-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-74-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-81-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-82-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-89-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB

        • memory/2040-90-0x00000000006E0000-0x00000000016E0000-memory.dmp

          Filesize

          16.0MB