Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    12/10/2026, 03:38

General

  • Target
    SKMBT-5069654-0394650039-9959594594.exe
  • Size 1.5MB
  • Sample261012-d698bsvx3q
  • SHA256 2021b82ce02867da4644bd875006f3ed53a5778cdaf9ec928eddff1023a19108
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • orcus

Botnet
  • mamba

C2
  • 172.111.249.187:7077

Mutex
  • 46bcc3fe92574f16a59dec5b735cf025

Attributes
  • autostart_method

    Disable

  • enable_keylogger

    true

  • install_path

    %programfiles%\Orcus\Orcus.exe

  • reconnect_delay

    10000

  • registry_keyname

    Orcus

  • taskscheduler_taskname

    Orcus

  • watchdog_path

    AppData\OrcusWatchdog.exe

Signatures

  • Family: Orcus

    Orcus is a Remote Access Trojan that is being sold on underground forums.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops desktop.ini file(s) 3 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SKMBT-5069654-0394650039-9959594594.exe
    "C:\Users\Admin\AppData\Local\Temp\SKMBT-5069654-0394650039-9959594594.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4208
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.vbs"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Executes a VBScript file via the Windows Script Host.
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4316
      • C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe
        "C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1784
        • C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe
          "C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe"
          4⤵
          • Executes dropped EXE
          • Drops desktop.ini file(s)
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2912
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
            "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\rmk8rove.cmdline"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:2428
            • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
              C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDA2F.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCDA2E.tmp"
              6⤵
                PID:64
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.vbs"
      1⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Executes a VBScript file via the Windows Script Host.
      • Suspicious use of WriteProcessMemory
      PID:1928
      • C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe
        "C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe"
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2316
        • C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe
          "C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe"
          3⤵
          • Executes dropped EXE
          • Drops desktop.ini file(s)
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2424
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
            "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\4ummddrl.cmdline"
            4⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:892
            • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
              C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDA20.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCDA1F.tmp"
              5⤵
                PID:4772

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            4ummddrl.dll

            • Path C:\Users\Admin\AppData\Local\Temp\4ummddrl.dll
            • Size 76KB
            • SHA256 fcfadfc36a86a7df2277fcb4d63bed004c29b5de0c9f59d9e851906f15e96acf
            • MD5 SHA1 SHA512 SSDEEP TLSH

            RESDA20.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\RESDA20.tmp
            • Size 1KB
            • SHA256 398d58521b1c64704c0b1b5bec88f4ac105ebb38979aa79d2df897506c6ed0c1
            • MD5 SHA1 SHA512 TLSH

            RESDA2F.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\RESDA2F.tmp
            • Size 1KB
            • SHA256 ebffbada98082c02ed4ba3f11d4583d3b855fbd4854062d9875df2540a2746b6
            • MD5 SHA1 SHA512 TLSH

            rmk8rove.dll

            • Path C:\Users\Admin\AppData\Local\Temp\rmk8rove.dll
            • Size 76KB
            • SHA256 8a7165b18982265aff5697a389b31b29c4ccaa4491ca91f64b944ffb691ed962
            • MD5 SHA1 SHA512 SSDEEP TLSH

            notepad.exe

            • Path C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.exe
            • Size 1.5MB
            • SHA256 0909505344449d7e7c1a70888f8d40d0cf6af36625a5120992736e70e4809496
            • MD5 SHA1 SHA512 SSDEEP TLSH

            notepad.vbs

            • Path C:\Users\Admin\AppData\Local\Temp\subfolder\notepad.vbs
            • Size 1024B
            • SHA256 d3a93e342c074e3a5946b1bb46ceb70de299eac51339f366025c8c851c3ae1a4
            • MD5 SHA1 SHA512 TLSH

            Desktop.ini

            • Path C:\Windows\assembly\Desktop.ini
            • Size 227B
            • SHA256 a709c2551b8818d7849d31a65446dc2f8c4cca2dcbbc5385604286f49cfdaf1c
            • MD5 SHA1 SHA512 TLSH

            4ummddrl.0.cs

            • Path \??\c:\Users\Admin\AppData\Local\Temp\4ummddrl.0.cs
            • Size 208KB
            • SHA256 a6882e788748e5caa8d3f2f107780ce33d0415a4aad199429fbb17103601cdc3
            • MD5 SHA1 SHA512 SSDEEP TLSH

            4ummddrl.cmdline

            • Path \??\c:\Users\Admin\AppData\Local\Temp\4ummddrl.cmdline
            • Size 347B
            • SHA256 9787877c20a6e28de3de01961d78b096a6520d412295296a1d823b6e373a7d20
            • MD5 SHA1 SHA512 TLSH

            CSCDA1F.tmp

            • Path \??\c:\Users\Admin\AppData\Local\Temp\CSCDA1F.tmp
            • Size 676B
            • SHA256 39a5a5e519918cbb201bb0b140463daa3b4d66a404f9babf9145b82715b42349
            • MD5 SHA1 SHA512 TLSH

            CSCDA2E.tmp

            • Path \??\c:\Users\Admin\AppData\Local\Temp\CSCDA2E.tmp
            • Size 676B
            • SHA256 50e933cca720c4e88cdc6a66a29a169fc6fe08bb2abf9d6f5fc6064208847829
            • MD5 SHA1 SHA512 TLSH

            rmk8rove.0.cs

            • Path \??\c:\Users\Admin\AppData\Local\Temp\rmk8rove.0.cs
            • Size 208KB
            • SHA256 9d6a472b05fb3e84fea4e47b963994b58e86de8cf56051d8ec3b24828a2c6e0e
            • MD5 SHA1 SHA512 SSDEEP TLSH

            rmk8rove.cmdline

            • Path \??\c:\Users\Admin\AppData\Local\Temp\rmk8rove.cmdline
            • Size 347B
            • SHA256 6b99a4d590eaa9374380f5ce426a507561c55a3efa0c08c13dfe89cd58ad0a65
            • MD5 SHA1 SHA512 TLSH

            memory/1784-16-0x0000000002220000-0x0000000002226000-memory.dmp

            memory/2424-48-0x0000000000400000-0x00000000004E8000-memory.dmp

            memory/4208-2-0x0000000002AA0000-0x0000000002AA6000-memory.dmp