Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    05/06/2026, 10:03

General

  • Target
    setup.msi
  • Size 3.8MB
  • Sample260605-l3ntxsdt21
  • SHA256 8d60ebbaea8a7b8be25cd7e41736eb6a4801d3aa0a53a0d7022d12951f5a473a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: NetSupport

    NetSupport is a remote access tool sold as a legitimate system administration software.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 7 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops file in Windows directory 12 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • 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.

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\setup.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2176
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3040
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 821B4ED077E6037E3D2C4EBA9C9A1BE8
        2⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:4492
        • C:\Users\Admin\AppData\Local\MerryFlorist\7z.exe
          "C:\Users\Admin\AppData\Local\MerryFlorist\7z.exe" x "C:\Users\Admin\AppData\Local\MerryFlorist\WebCacheV01.dat" -p040904b0 -aoa -y -o"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup"
          3⤵
          • Drops startup file
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1320
        • C:\Users\Admin\AppData\Local\MerryFlorist\7z.exe
          "C:\Users\Admin\AppData\Local\MerryFlorist\7z.exe" x "C:\Users\Admin\AppData\Local\MerryFlorist\AppxMetadata.bin" -p77d2a1c8e04f -aoa -y -o"C:\ProgramData\MerryFlorist"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:4044
        • C:\Windows\explorer.exe
          "C:\Windows\explorer.exe" "C:\ProgramData\MerryFlorist\SecurityHealth.exe"
          3⤵
            PID:4032
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Checks SCSI registry key(s)
        • Suspicious use of AdjustPrivilegeToken
        PID:5004
      • C:\Windows\explorer.exe
        C:\Windows\explorer.exe
        1⤵
        • Modifies registry class
        PID:3276
      • C:\Windows\explorer.exe
        C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:3032
        • C:\ProgramData\MerryFlorist\SecurityHealth.exe
          "C:\ProgramData\MerryFlorist\SecurityHealth.exe"
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious use of FindShellTrayWindow
          PID:2068

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            e58b62d.rbs

            • Path C:\Config.Msi\e58b62d.rbs
            • Size 8KB
            • SHA256 78996d766ad44c24c4d5720c3333db41b3c25cc62932cf39e6013f36316e9113
            • MD5 SHA1 SHA512 SSDEEP TLSH

            HTCTL32.DLL

            • Path C:\ProgramData\MerryFlorist\HTCTL32.DLL
            • Size 316KB
            • SHA256 6562585009f15155eea9a489e474cebc4dd2a01a26d846fdd1b93fdc24b0c269
            • MD5 SHA1 SHA512 SSDEEP TLSH

            NSM.LIC

            • Path C:\ProgramData\MerryFlorist\NSM.LIC
            • Size 251B
            • SHA256 53b4a9603905e7838842694a90549362d9ec25b6d22e1c4f3d6c14e040c7a76c
            • MD5 SHA1 SHA512 TLSH

            PCICHEK.DLL

            • Path C:\ProgramData\MerryFlorist\PCICHEK.DLL
            • Size 14KB
            • SHA256 0cff893b1e7716d09fb74b7a0313b78a09f3f48c586d31fc5f830bd72ce8331f
            • MD5 SHA1 SHA512 SSDEEP TLSH

            PCICL32.dll

            • Path C:\ProgramData\MerryFlorist\PCICL32.dll
            • Size 3.3MB
            • SHA256 b6d4ad0231941e0637485ac5833e0fdc75db35289b54e70f3858b70d36d04c80
            • MD5 SHA1 SHA512 SSDEEP TLSH

            SecurityHealth.exe

            • Path C:\ProgramData\MerryFlorist\SecurityHealth.exe
            • Size 33KB
            • SHA256 275e5b085534f64313b50cbdcb08ecd59c57d21c96bb937f140ee92a3d27f792
            • MD5 SHA1 SHA512 SSDEEP TLSH

            falos.ini

            • Path C:\ProgramData\MerryFlorist\falos.ini
            • Size 706B
            • SHA256 244d2be703f5d60f7a763d754a11ec68577ffb0c8b04397a63d03ba9623dfc1a
            • MD5 SHA1 SHA512 TLSH

            msvcr100.dll

            • Path C:\ProgramData\MerryFlorist\msvcr100.dll
            • Size 755KB
            • SHA256 8793353461826fbd48f25ea8b835be204b758ce7510db2af631b28850355bd18
            • MD5 SHA1 SHA512 SSDEEP TLSH

            pcicapi.dll

            • Path C:\ProgramData\MerryFlorist\pcicapi.dll
            • Size 106KB
            • SHA256 2dfdc169dfc27462adc98dde39306de8d0526dcf4577a1a486c2eef447300689
            • MD5 SHA1 SHA512 SSDEEP TLSH

            7z.dll

            • Path C:\Users\Admin\AppData\Local\MerryFlorist\7z.dll
            • Size 1.1MB
            • SHA256 b17c3e4058aacdcc36b18858d128d6b3058e0ea607a4dc59eb95b18b7c6acc7c
            • MD5 SHA1 SHA512 SSDEEP TLSH

            7z.exe

            • Path C:\Users\Admin\AppData\Local\MerryFlorist\7z.exe
            • Size 296KB
            • SHA256 43907e54cf3d1258f695d1112759b5457576481072cc76a679b8477cfeb3db87
            • MD5 SHA1 SHA512 SSDEEP TLSH

            AppxMetadata.bin

            • Path C:\Users\Admin\AppData\Local\MerryFlorist\AppxMetadata.bin
            • Size 3.1MB
            • SHA256 5319eb53f3769e429eb4b746b64805876bf5cf928646e6f7731dfc62579fe16a
            • MD5 SHA1 SHA512 SSDEEP TLSH

            WebCacheV01.dat

            • Path C:\Users\Admin\AppData\Local\MerryFlorist\WebCacheV01.dat
            • Size 769B
            • SHA256 19dd62584aacb7cf9031b06f673b4e605408ba675925bcf783ad7ea689e04f8f
            • MD5 SHA1 SHA512 TLSH

            SecurityHealth.lnk

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SecurityHealth.lnk
            • Size 907B
            • SHA256 252b002d47363afdd391ee783db161aacbe8e4d12da2d3259822920b669ecd07
            • MD5 SHA1 SHA512 TLSH

            e58b62c.msi

            • Path C:\Windows\Installer\e58b62c.msi
            • Size 3.8MB
            • SHA256 8d60ebbaea8a7b8be25cd7e41736eb6a4801d3aa0a53a0d7022d12951f5a473a
            • MD5 SHA1 SHA512 SSDEEP TLSH

            metadata-2

            • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
            • Size 24.6MB
            • SHA256 6987e1c4cc3f9aa1c4eaff923acd076ce14881362324d70645652033c757cedf
            • MD5 SHA1 SHA512 SSDEEP TLSH

            {4780eac1-b49a-48de-a0bb-25198b9ce39a}_OnDiskSnapshotProp

            • Path \??\Volume{b99e3a64-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{4780eac1-b49a-48de-a0bb-25198b9ce39a}_OnDiskSnapshotProp
            • Size 6KB
            • SHA256 ea3e2276e1538f1584a339cc142d43c4af29994f1fe2e34835337e6409428949
            • MD5 SHA1 SHA512 SSDEEP TLSH