Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/04/2024, 01:55

General

  • Target
    cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe
  • Size 1.6MB
  • Sample240423-cb4xdsbd61
  • SHA256 cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 127.0.0.1:45671

  • 127.0.0.1:55677

  • 192.3.101.8:55677

  • 192.3.101.8:45671

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-2P1XPK

  • 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) 19 IoCs
  • Detects executables built or packed with MPress PE compressor 18 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs
  • ModiLoader Second Stage 1 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 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 SetThreadContext 3 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Script User-Agent 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe
    "C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1384
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\LppkcfhhO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3136
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
        3⤵
          PID:1968
        • C:\Windows\SysWOW64\xcopy.exe
          xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
          3⤵
          • Enumerates system info in registry
          PID:3560
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:3888
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "Aaa.bat" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:4592
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:1836
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:2452
            • C:\Windows \System32\easinvoker.exe
              "C:\Windows \System32\easinvoker.exe"
              3⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:2156
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\windows \system32\aaa.bat""
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:4104
                • C:\Windows\System32\extrac32.exe
                  C:\\Windows\\System32\\extrac32.exe /C /Y C:\\Windows\\System32\\cmd.exe C:\\Users\\Public\\alpha.exe
                  5⤵
                    PID:1388
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                    5⤵
                    • Executes dropped EXE
                    • Suspicious use of WriteProcessMemory
                    PID:1408
                    • 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:2316
            • C:\Windows\SysWOW64\extrac32.exe
              C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe C:\\Users\\Public\\Libraries\\Lppkcfhh.PIF
              2⤵
                PID:4480
              • C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe
                C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe /stext "C:\Users\Admin\AppData\Local\Temp\znqw"
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:4812
              • C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe
                C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe /stext "C:\Users\Admin\AppData\Local\Temp\ciwpnzb"
                2⤵
                • Accesses Microsoft Outlook accounts
                PID:1720
              • C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe
                C:\Users\Admin\AppData\Local\Temp\cf10c660707993307c44880f02405f59c2970b4de12bfb3d53a593d002c01908.exe /stext "C:\Users\Admin\AppData\Local\Temp\mkbhnsliwbl"
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1872
            • 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=4032 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
              1⤵
                PID:1596

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    logs.dat

                    • Path C:\ProgramData\remcos\logs.dat
                    • Size 144B
                    • SHA256 2debeaece8e829f562b9aaf8f27cbac9e0590dff178a70351aec1d2889363eff
                    • MD5 SHA1 SHA512

                    __PSScriptPolicyTest_lfoqeeyh.5ne.ps1

                    • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lfoqeeyh.5ne.ps1
                    • Size 60B
                    • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                    • MD5 SHA1 SHA512

                    znqw

                    • Path C:\Users\Admin\AppData\Local\Temp\znqw
                    • Size 4KB
                    • SHA256 7176ca3d0196ec46f178107fdb587adaef3f6ea65daa80eccd2371a515880e04
                    • MD5 SHA1 SHA512 SSDEEP

                    LppkcfhhO.bat

                    • Path C:\Users\Public\Libraries\LppkcfhhO.bat
                    • Size 29KB
                    • SHA256 abac4a967800f5da708572ec42441ec373cd52459a83a8a382d6b8579482789d
                    • MD5 SHA1 SHA512 SSDEEP

                    aaa.bat

                    • Path C:\Users\Public\Libraries\aaa.bat
                    • Size 3KB
                    • SHA256 11c20fabf677cd77e8a354b520f6ffca09cac37ce15c9932550e749e49efe08a
                    • MD5 SHA1 SHA512

                    easinvoker.exe

                    • Path C:\Users\Public\Libraries\easinvoker.exe
                    • Size 128KB
                    • SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
                    • MD5 SHA1 SHA512 SSDEEP

                    netutils.dll

                    • Path C:\Users\Public\Libraries\netutils.dll
                    • Size 114KB
                    • SHA256 a692d4305b95e57e2cfc871d53a41a5bfc9e306cb1a86ca1159db4f469598714
                    • MD5 SHA1 SHA512 SSDEEP

                    alpha.exe

                    • Path C:\Users\Public\alpha.exe
                    • Size 283KB
                    • SHA256 b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/1384-32-0x0000000000850000-0x0000000000851000-memory.dmp

                    memory/1384-67-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-0-0x0000000000850000-0x0000000000851000-memory.dmp

                    memory/1384-147-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-4-0x0000000000400000-0x0000000000598000-memory.dmp

                    memory/1384-137-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-136-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-126-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-125-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-122-0x0000000033A80000-0x0000000033A99000-memory.dmp

                    memory/1384-55-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-57-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-58-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-59-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-61-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-64-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-66-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-148-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-69-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-2-0x0000000002F80000-0x0000000003F80000-memory.dmp

                    memory/1384-113-0x0000000033A80000-0x0000000033A99000-memory.dmp

                    memory/1384-74-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-1-0x0000000002F80000-0x0000000003F80000-memory.dmp

                    memory/1384-114-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-108-0x0000000033A80000-0x0000000033A99000-memory.dmp

                    memory/1384-111-0x0000000033A80000-0x0000000033A99000-memory.dmp

                    memory/1384-90-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1384-112-0x0000000033A80000-0x0000000033A99000-memory.dmp

                    memory/1384-89-0x00000000157A0000-0x00000000167A0000-memory.dmp

                    memory/1720-83-0x0000000000400000-0x0000000000462000-memory.dmp

                    memory/1720-86-0x0000000000400000-0x0000000000462000-memory.dmp

                    memory/1720-88-0x0000000000400000-0x0000000000462000-memory.dmp

                    memory/1720-95-0x0000000000400000-0x0000000000462000-memory.dmp

                    memory/1720-76-0x0000000000400000-0x0000000000462000-memory.dmp

                    memory/1872-94-0x0000000000430000-0x00000000004F9000-memory.dmp

                    memory/1872-79-0x0000000000400000-0x0000000000424000-memory.dmp

                    memory/1872-97-0x0000000000400000-0x0000000000424000-memory.dmp

                    memory/1872-87-0x0000000000400000-0x0000000000424000-memory.dmp

                    memory/1872-84-0x0000000000400000-0x0000000000424000-memory.dmp

                    memory/2156-25-0x00000000613C0000-0x00000000613E3000-memory.dmp

                    memory/2316-49-0x00007FFEAB420000-0x00007FFEABEE1000-memory.dmp

                    memory/2316-46-0x000001717BD00000-0x000001717BD10000-memory.dmp

                    memory/2316-45-0x000001717BD00000-0x000001717BD10000-memory.dmp

                    memory/2316-43-0x00007FFEAB420000-0x00007FFEABEE1000-memory.dmp

                    memory/2316-44-0x000001717BD00000-0x000001717BD10000-memory.dmp

                    memory/2316-35-0x000001717BE20000-0x000001717BE42000-memory.dmp

                    memory/4812-77-0x0000000000400000-0x0000000000478000-memory.dmp

                    memory/4812-81-0x0000000000400000-0x0000000000478000-memory.dmp

                    memory/4812-105-0x0000000000400000-0x0000000000478000-memory.dmp

                    memory/4812-72-0x0000000000400000-0x0000000000478000-memory.dmp