Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 21:52

General

  • Target
    Proforma Invoice P002821.exe
  • Size 1.3MB
  • Sample240214-1rbsjscc34
  • SHA256 a2ef2840d2cb8314c387373d91cd579a556a338b852ed4c2ee0502c7f387c26a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • officerem.duckdns.org:47212

  • 127.0.0.1:47212

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-0QM6RG

  • 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
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 2 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 4 IoCs
  • Launches sc.exe 2 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Script User-Agent 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Proforma Invoice P002821.exe
    "C:\Users\Admin\AppData\Local\Temp\Proforma Invoice P002821.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4568
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\PwzssbqnO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2320
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows "
        3⤵
          PID:2220
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:4460
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:2640
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:860
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:2268
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
              3⤵
                PID:2968
              • C:\Windows\SysWOW64\xcopy.exe
                xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
                3⤵
                • Enumerates system info in registry
                PID:3168
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
                3⤵
                  PID:1276
                • C:\Windows\SysWOW64\xcopy.exe
                  xcopy "x.bat" "C:\Windows \System32\" /K /D /H /Y
                  3⤵
                  • Enumerates system info in registry
                  PID:3308
                • C:\Windows \System32\easinvoker.exe
                  "C:\\Windows \\System32\\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of WriteProcessMemory
                  PID:4552
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:216
                    • 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:1012
                      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                        powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                        6⤵
                        • Suspicious use of AdjustPrivilegeToken
                        PID:1984
                    • C:\Windows\system32\sc.exe
                      sc.exe create truesight binPath="C:\Users\Public\Libraries\truesight.sys" type=kernel
                      5⤵
                      • Launches sc.exe
                      PID:3660
                    • C:\Windows\system32\sc.exe
                      sc.exe start truesight
                      5⤵
                      • Launches sc.exe
                      PID:2168
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c "C:\\Windows \\System32\\easinvoker.exe"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:4472
                • C:\Windows \System32\easinvoker.exe
                  "C:\\Windows \\System32\\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  PID:3528
              • C:\Users\Public\Libraries\nqbsszwP.pif
                C:\Users\Public\Libraries\nqbsszwP.pif
                2⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious behavior: MapViewOfSection
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:2608
                • C:\Users\Public\Libraries\nqbsszwP.pif
                  C:\Users\Public\Libraries\nqbsszwP.pif /stext "C:\Users\Admin\AppData\Local\Temp\arextwjyitbnhfoui"
                  3⤵
                  • Executes dropped EXE
                  PID:1388
                • C:\Users\Public\Libraries\nqbsszwP.pif
                  C:\Users\Public\Libraries\nqbsszwP.pif /stext "C:\Users\Admin\AppData\Local\Temp\nnoiuzmtsklxuzycjcnirijb"
                  3⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2084
                • C:\Users\Public\Libraries\nqbsszwP.pif
                  C:\Users\Public\Libraries\nqbsszwP.pif /stext "C:\Users\Admin\AppData\Local\Temp\lljqugcawctsktkysrsg"
                  3⤵
                  • Executes dropped EXE
                  • Accesses Microsoft Outlook accounts
                  PID:4992

            Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  logs.dat

                  • Path C:\ProgramData\remcos\logs.dat
                  • Size 144B
                  • SHA256 d58505fa7517fce65dbcd110db1a2e54a8a4072d71dec0bc1d5c7c869f896e7d
                  • MD5 SHA1 SHA512

                  __PSScriptPolicyTest_hobr4w2m.tdp.ps1

                  • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hobr4w2m.tdp.ps1
                  • Size 60B
                  • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                  • MD5 SHA1 SHA512

                  arextwjyitbnhfoui

                  • Path C:\Users\Admin\AppData\Local\Temp\arextwjyitbnhfoui
                  • Size 4KB
                  • SHA256 b92f48c215f2d309a748e67787283bb2c61bbce1faf7dcb3b917f57be92b28e2
                  • MD5 SHA1 SHA512 SSDEEP

                  KDECO.bat

                  • Path C:\Users\Public\Libraries\KDECO.bat
                  • Size 4KB
                  • SHA256 c8e1912a3328802e98563e32eb053ae3e28249b701054af227e9f1ba6bfe24d9
                  • MD5 SHA1 SHA512 SSDEEP

                  PwzssbqnO.bat

                  • Path C:\Users\Public\Libraries\PwzssbqnO.bat
                  • Size 7KB
                  • SHA256 f46e0cc2c119a32dd87edf97bfc73d985ee97d2c9dc00274b6b20d641e29deea
                  • MD5 SHA1 SHA512 SSDEEP

                  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 115KB
                  • SHA256 6da1571c3392650a1e125c3d37d674140896c10da705c052375992997de77281
                  • MD5 SHA1 SHA512 SSDEEP

                  nqbsszwP.pif

                  • Path C:\Users\Public\Libraries\nqbsszwP.pif
                  • Size 66KB
                  • SHA256 7bcdc2e607abc65ef93afd009c3048970d9e8d1c2a18fc571562396b13ebb301
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/1388-69-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/1388-96-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/1388-75-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/1388-82-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/1388-86-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/1984-42-0x00007FF836770000-0x00007FF837231000-memory.dmp

                  memory/1984-39-0x0000025FECB30000-0x0000025FECB40000-memory.dmp

                  memory/1984-38-0x0000025FECB30000-0x0000025FECB40000-memory.dmp

                  memory/1984-37-0x00007FF836770000-0x00007FF837231000-memory.dmp

                  memory/1984-36-0x0000025FD4990000-0x0000025FD49B2000-memory.dmp

                  memory/2084-93-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/2084-92-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/2084-91-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/2084-84-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/2084-78-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/2608-52-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-120-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-63-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-64-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-66-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-68-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-146-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-61-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-60-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-145-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-58-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-57-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-143-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-54-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-139-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-136-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-135-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-49-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-134-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-131-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-99-0x000000003F230000-0x000000003F249000-memory.dmp

                  memory/2608-129-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-102-0x000000003F230000-0x000000003F249000-memory.dmp

                  memory/2608-103-0x000000003F230000-0x000000003F249000-memory.dmp

                  memory/2608-104-0x000000003F230000-0x000000003F249000-memory.dmp

                  memory/2608-105-0x000000003F230000-0x000000003F249000-memory.dmp

                  memory/2608-106-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-108-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-111-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-112-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-114-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-125-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-116-0x000000003F230000-0x000000003F249000-memory.dmp

                  memory/2608-117-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-62-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/2608-123-0x0000000000400000-0x0000000000482000-memory.dmp

                  memory/2608-124-0x0000000000400000-0x0000000001400000-memory.dmp

                  memory/3528-53-0x00000000613C0000-0x00000000613E3000-memory.dmp

                  memory/4552-25-0x00000000613C0000-0x00000000613E3000-memory.dmp

                  memory/4568-1-0x0000000004300000-0x0000000005300000-memory.dmp

                  memory/4568-2-0x0000000004300000-0x0000000005300000-memory.dmp

                  memory/4568-26-0x0000000000400000-0x0000000000559000-memory.dmp

                  memory/4568-0-0x0000000002310000-0x0000000002311000-memory.dmp

                  memory/4992-85-0x0000000000400000-0x0000000000457000-memory.dmp

                  memory/4992-83-0x0000000000400000-0x0000000000457000-memory.dmp

                  memory/4992-77-0x0000000000400000-0x0000000000457000-memory.dmp

                  memory/4992-71-0x0000000000400000-0x0000000000457000-memory.dmp