Analysis

  • max time kernel
    148s
  • max time network
    155s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    05/08/2026, 12:19

General

  • Target
    pdf_26072026.msi
  • Size 18.0MB
  • Sample260805-phebjafn3v
  • SHA256 efb6721c743eecdbe2be7c19c951ed1fe70381f53d55130c9f0d6e02969c5ff7
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 1 IoCs
  • TiFlux remote access tool 3 IoCs

    TiFlux is a remote monitoring and management tool that can be used as a backdoor.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Badlisted process makes network request 2 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.

  • Costura .NET executable packer 1 IoCs

    Costura packer aka Costura Fody, is an add-in for the .NET framework that embeds all external dependency .dll files as resources inside main executable.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 13 IoCs
  • Launches sc.exe 2 IoCs

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

  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Executes a command shell one-liner 1 TTPs 4 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • 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 13 IoCs
  • Modifies registry class 22 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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\pdf_26072026.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:2632
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Adds Run key to start application
    • 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:5884
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4600
      • C:\Windows\system32\cmd.exe
        "cmd.exe" /c start /MIN "" "C:\Program Files (x86)\TiFLUX\\desktop\TiAgent.exe"
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:5888
        • C:\Program Files (x86)\TiFLUX\desktop\TiAgent.exe
          "C:\Program Files (x86)\TiFLUX\\desktop\TiAgent.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          PID:4404
      • C:\Windows\system32\cmd.exe
        "cmd.exe" /c start /MIN "" "C:\Program Files (x86)\TiFLUX\\si.exe"
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:5364
        • C:\Program Files (x86)\TiFLUX\si.exe
          "C:\Program Files (x86)\TiFLUX\\si.exe"
          3⤵
          • Executes dropped EXE
          PID:1976
      • C:\Windows\system32\cmd.exe
        "cmd.exe" /c sc failure TiService reset= 86400 actions= restart/30000
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:3696
        • C:\Windows\System32\sc.exe
          sc failure TiService reset= 86400 actions= restart/30000
          3⤵
          • Launches sc.exe
          PID:4072
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:244
    • C:\Program Files (x86)\TiFLUX\TiService.exe
      "C:\Program Files (x86)\TiFLUX\TiService.exe"
      1⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:6004
      • C:\Windows\system32\cmd.exe
        "cmd" /c "sc failure TiService reset= 86400 actions= restart/30000"
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:1488
        • C:\Windows\System32\sc.exe
          sc failure TiService reset= 86400 actions= restart/30000
          3⤵
          • Launches sc.exe
          PID:1984
    • C:\Program Files (x86)\TiFLUX\desktop\TiAgent.exe
      "C:\Program Files (x86)\TiFLUX\desktop\TiAgent.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4920

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e5a29c2.rbs

          • Path C:\Config.Msi\e5a29c2.rbs
          • Size 36KB
          • SHA256 1886861c9a3067b6c2014d3161f298f43aa904d52b6cf75a41240be7bad04653
          • MD5 SHA1 SHA512 SSDEEP TLSH

          TiService.exe

          • Path C:\Program Files (x86)\TiFLUX\TiService.exe
          • Size 7.8MB
          • SHA256 feb96b1d11ea4b62a65a22981c1875c6e802c437c229e861fec4c6e601761f97
          • MD5 SHA1 SHA512 SSDEEP TLSH

          TiService.exe.config

          • Path C:\Program Files (x86)\TiFLUX\TiService.exe.config
          • Size 773B
          • SHA256 31807bdb4d25fa4f410073209c248550fe8eb6f18673797c0fd1f0c2b7d726e7
          • MD5 SHA1 SHA512 TLSH

          install.bat

          • Path C:\Program Files (x86)\TiFLUX\dependencies\ultravnc\driver\w2K\install.bat
          • Size 16B
          • SHA256 8402e0c9189fa6ef6ef8e955606c5a20f880f1106ea5f81304e42a0864f078f8
          • MD5 SHA1 SHA512

          install_silent.bat

          • Path C:\Program Files (x86)\TiFLUX\dependencies\ultravnc\driver\w2K\install_silent.bat
          • Size 17B
          • SHA256 15af5763e85b2250dd1d00ed3ab051a69f3dd00cd679f7646ff34f18ed867476
          • MD5 SHA1 SHA512

          license.txt

          • Path C:\Program Files (x86)\TiFLUX\dependencies\ultravnc\driver\w2K\license.txt
          • Size 1KB
          • SHA256 18d357c3792c89e9a8fc127e65a81be919bec7166e537eca080478e0370e61c6
          • MD5 SHA1 SHA512 TLSH

          uninstall.bat

          • Path C:\Program Files (x86)\TiFLUX\dependencies\ultravnc\driver\w2K\uninstall.bat
          • Size 18B
          • SHA256 010287946e1c4d4f95451ae3fe6168ae03fe91e040c5d86ce78d2f38b3973ee1
          • MD5 SHA1 SHA512

          uninstall_silent.bat

          • Path C:\Program Files (x86)\TiFLUX\dependencies\ultravnc\driver\w2K\uninstall_silent.bat
          • Size 19B
          • SHA256 749527f0ed65353004a9a988029e38e89f1ec97fb400a3f26ec705280a95333f
          • MD5 SHA1 SHA512

          TiAgent.exe

          • Path C:\Program Files (x86)\TiFLUX\desktop\TiAgent.exe
          • Size 739KB
          • SHA256 17e6f123a698e7fe5ed2968b5e5adfb560b680b25693ff08499f57d30434f96f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          TiAgent.exe.config

          • Path C:\Program Files (x86)\TiFLUX\desktop\TiAgent.exe.config
          • Size 777B
          • SHA256 c86bdb089ada86ae84305a9f86d9fddacbd195d75f69723dd035eb83b2a4ec7f
          • MD5 SHA1 SHA512 TLSH

          TiAgent.resources.dll

          • Path C:\Program Files (x86)\TiFLUX\desktop\en\TiAgent.resources.dll
          • Size 3KB
          • SHA256 9dc3efe5099ce2b6469b1315eaf923e7dbfe659d6aeac11fe2eafb914f01a0c4
          • MD5 SHA1 SHA512 TLSH

          si.exe

          • Path C:\Program Files (x86)\TiFLUX\si.exe
          • Size 26KB
          • SHA256 d6f3beaae7762c21cdef000082e32ed1d28be6d3f3e1cd3c98240a80e1e7f64d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e5a29c1.msi

          • Path C:\Windows\Installer\e5a29c1.msi
          • Size 18.0MB
          • SHA256 efb6721c743eecdbe2be7c19c951ed1fe70381f53d55130c9f0d6e02969c5ff7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          sqlite.interop.dll

          • Path C:\Windows\SystemTemp\Costura\370AC3D2F4BDCF180A9B67A95B28C0DC\64\sqlite.interop.dll
          • Size 1.6MB
          • SHA256 96c952efa25720eec63437df20e20b8959dde5230c6f1d5c30be68cf72665532
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 f1b62bb8c19dd197b6cad7049e81f1cb281510fea3cc3132fa96e2ad39f08a0f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {f3da9bc7-e88a-44e1-a9aa-cd9884dc8f2b}_OnDiskSnapshotProp

          • Path \??\Volume{c61f3bad-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{f3da9bc7-e88a-44e1-a9aa-cd9884dc8f2b}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 64fd4cdb3a22bc6b9cc058292afe9e435507b7b22b133e89a89c00d10c6d97db
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1976-196-0x0000000000950000-0x000000000095C000-memory.dmp

          memory/4920-174-0x00000225EA760000-0x00000225EA7DE000-memory.dmp

          memory/4920-185-0x00000225EA730000-0x00000225EA738000-memory.dmp

          memory/4920-171-0x00000225E8000000-0x00000225E80BC000-memory.dmp

          memory/4920-172-0x00000225E8500000-0x00000225E8512000-memory.dmp

          memory/4920-175-0x00000225EB2E0000-0x00000225EB356000-memory.dmp

          memory/6004-183-0x00000179F30C0000-0x00000179F3150000-memory.dmp

          memory/6004-176-0x00000179F3070000-0x00000179F30B8000-memory.dmp

          memory/6004-190-0x00000179F3190000-0x00000179F31B2000-memory.dmp

          memory/6004-192-0x00000179F33A0000-0x00000179F33BE000-memory.dmp

          memory/6004-173-0x00000179F2260000-0x00000179F22C0000-memory.dmp

          memory/6004-178-0x00000179F22C0000-0x00000179F22E7000-memory.dmp

          memory/6004-198-0x00000179F35C0000-0x00000179F3610000-memory.dmp

          memory/6004-177-0x00000179F2450000-0x00000179F248A000-memory.dmp

          memory/6004-167-0x00000179F1A00000-0x00000179F1A0E000-memory.dmp

          memory/6004-166-0x00000179F19C0000-0x00000179F19D8000-memory.dmp

          memory/6004-161-0x00000179F08B0000-0x00000179F108A000-memory.dmp