Analysis

  • max time kernel
    148s
  • max time network
    139s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    09/10/2026, 18:10

General

  • Target
    jaffacakes118_Trojan-Dropper.Win32.Delf.de.exe
  • Size 705KB
  • Sample261009-wr4fcacw4x
  • SHA256 a91c0f017921ace32229b28a2ea739ab3eeba27ec3073554f7efac5783fce31a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 40 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Drops file in Drivers directory 4 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 6 IoCs
  • Adds Run key to start application 2 TTPs 12 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 4 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 4 IoCs
  • Drops file in Windows directory 24 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 20 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Delf.de.exe
    "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Delf.de.exe"
    1⤵
    • Boot or Logon Autostart Execution: Active Setup
    • Drops file in Drivers directory
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s "C:\Windows\system32\bhrw.dll"
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      PID:4492
  • C:\Windows\mshotfix.exe
    "C:\Windows\mshotfix.exe"
    1⤵
    • Boot or Logon Autostart Execution: Active Setup
    • Drops file in Drivers directory
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4244
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s "C:\Windows\system32\bhrw.dll"
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      PID:3480
  • \??\c:\registry.pif
    c:\registry.pif
    1⤵
    • Boot or Logon Autostart Execution: Active Setup
    • Drops file in Drivers directory
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4496
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s "C:\Windows\system32\bhrw.dll"
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      PID:3924
  • \??\c:\CriticalUpdate.exe
    c:\CriticalUpdate.exe
    1⤵
    • Boot or Logon Autostart Execution: Active Setup
    • Drops file in Drivers directory
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1620
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s "C:\Windows\system32\bhrw.dll"
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      PID:5836

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        hosts

        • Path C:\WINDOWS\SYSTEM32\DRIVERS\ETC\hosts
        • Size 1KB
        • SHA256 478f35833689c557fb4b36d01edc7fc779a760ee521ad65abb509bfe6707d9a6
        • MD5 SHA1 SHA512 TLSH

        bhrw.dll

        • Path C:\Windows\SysWOW64\bhrw.dll
        • Size 500KB
        • SHA256 a50073c374f995e68a5e60d9fc3e7992b68a6cabaf41286e46971555902458df
        • MD5 SHA1 SHA512 SSDEEP TLSH

        registry.pif

        • Path C:\registry.pif
        • Size 705KB
        • SHA256 a91c0f017921ace32229b28a2ea739ab3eeba27ec3073554f7efac5783fce31a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/1620-24-0x0000000000400000-0x000000000049C000-memory.dmp

        memory/1948-2-0x0000000000400000-0x000000000049C000-memory.dmp

        memory/4244-23-0x0000000000400000-0x000000000049C000-memory.dmp

        memory/4492-6-0x0000000000C70000-0x0000000000CF2000-memory.dmp

        memory/4496-21-0x0000000000400000-0x000000000049C000-memory.dmp

        memory/5836-28-0x00000000021F0000-0x0000000002272000-memory.dmp