Overview

overview

4

Static

static

1

SumatraPDF...ll.exe

windows10-2004-x64

4

SumatraPDF...ll.exe

windows11-ltsc_2024-x64

4

Analysis

  • max time kernel
    59s
  • max time network
    6s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    28/06/2026, 03:59

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General

  • Target
    SumatraPDF-3.6.1-64-install.exe
  • Size 10.6MB
  • Sample260628-ej8xese17s
  • SHA256 1eee71cccd2ea6e94d5bcea54ee2f759844da3e1a0ee2f6045035b1d17b94381
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
4/10
discovery

Malware Config

Signatures

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Drops file in Program Files directory 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 8 IoCs

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

  • Enumerates system info in registry 2 TTPs 6 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SumatraPDF-3.6.1-64-install.exe
    "C:\Users\Admin\AppData\Local\Temp\SumatraPDF-3.6.1-64-install.exe"
    1⤵
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4488
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe" "C:\Program Files\SumatraPDF\SumatraPDF.exe"
      2⤵
        PID:4796
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5920
      • C:\Program Files\SumatraPDF\SumatraPDF.exe
        "C:\Program Files\SumatraPDF\SumatraPDF.exe"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Enumerates system info in registry
        PID:1068

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          SumatraPDF.exe
          • Path C:\Program Files\SumatraPDF\SumatraPDF.exe
          • Size 10.6MB
          • SHA256 1eee71cccd2ea6e94d5bcea54ee2f759844da3e1a0ee2f6045035b1d17b94381
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          libmupdf.dll
          • Path C:\Program Files\SumatraPDF\libmupdf.dll
          • Size 15.9MB
          • SHA256 a1290f350cc6c5de0c44d64be2f8e193f927c368224cb6b0738f9b843110c08c
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          SumatraPDF-settings.txt
          • Path C:\Users\Admin\AppData\Local\SumatraPDF\SumatraPDF-settings.txt
          • Size 2KB
          • SHA256 71fa07dfd2cbae23a880630604680112b3766c5a43f94cb9e2f0828f8f70e2e5
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          memory/1068-14-0x000001AA81740000-0x000001AA82795000-memory.dmp
          Download

          memory/1068-17-0x000001AA81740000-0x000001AA82795000-memory.dmp
          Download