Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/06/2026, 18:18

General

  • Target
    putty-64bit-0.84-installer.msi
  • Size 3.7MB
  • Sample260622-wx3e8sfw21
  • SHA256 190d00150e67ad3ff51af4b50e76a3ab97b863a34efd50472627b17c0cf4102b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Loads dropped DLL 2 IoCs
  • Badlisted process makes network request 1 IoCs

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

  • 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 Program Files directory 10 IoCs
  • Drops file in Windows directory 14 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 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 data under HKEY_USERS 3 IoCs
  • Modifies registry class 43 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 3 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\putty-64bit-0.84-installer.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    PID:5044
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4876
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding D41AAE76A06772BE1B56A42D1CAFA0A8 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4536
      • C:\Windows\SysWOW64\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Program Files\PuTTY\README.txt
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4504
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:5124
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3620

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e5978e0.rbs

          • Path C:\Config.Msi\e5978e0.rbs
          • Size 12KB
          • SHA256 71abc6b3343a4e48435f1627623a0ebc91603e642dab4a96c7a26c914d3d306e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          README.txt

          • Path C:\Program Files\PuTTY\README.txt
          • Size 1KB
          • SHA256 11bdf4f12d34f617cf81f0c30aef7b596dbd00d0d19cf9e3c2e4648d672b3809
          • MD5 SHA1 SHA512 TLSH

          PuTTY.lnk

          • Path C:\ProgramData\Microsoft\Windows\Start Menu\Programs\PuTTY (64-bit)\PuTTY.lnk
          • Size 1KB
          • SHA256 35fe31b5422d0dcb09d0d8eaa51ab29444be667e5bc684032cfde12565285606
          • MD5 SHA1 SHA512 TLSH

          PuTTY.lnk~RFe59863d.TMP

          • Path C:\ProgramData\Microsoft\Windows\Start Menu\Programs\PuTTY (64-bit)\PuTTY.lnk~RFe59863d.TMP
          • Size 945B
          • SHA256 94ad09b7f347537935b8a9c16f19e1b641a2eb2b56a2da1076c45769927cf9ca
          • MD5 SHA1 SHA512 TLSH

          MSI90CD.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI90CD.tmp
          • Size 199KB
          • SHA256 fb7a6eb19d1d1042d3bd8b3add9271116b8b6db3714dfcc0b6fee8e088d4a2cc
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIEBC.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSIEBC.tmp
          • Size 102KB
          • SHA256 097f1c3f27b18010448d77e3f70c4d9f774cb9c5ab435c62baa1c00e4cadd5ef
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e5978df.msi

          • Path C:\Windows\Installer\e5978df.msi
          • Size 3.7MB
          • SHA256 190d00150e67ad3ff51af4b50e76a3ab97b863a34efd50472627b17c0cf4102b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 81e3469c30fbf1b9acffb285c1c2ec6313e896d531b71c4cf1cdf186407678d4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {ab32a954-3740-4438-9736-b91a30818bec}_OnDiskSnapshotProp

          • Path \??\Volume{2e4f07ee-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{ab32a954-3740-4438-9736-b91a30818bec}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 114e406a98c2c9b588a61a4c1f9ea10eaeafc42deebe29aa7a2ab6c9ab755d99
          • MD5 SHA1 SHA512 SSDEEP TLSH