Analysis

  • max time kernel
    141s
  • max time network
    105s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/05/2024, 02:26

General

  • Target
    b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe
  • Size 5.5MB
  • Sample240503-cw2b1aeh98
  • SHA256 b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detect Neshta payload 4 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe
    "C:\Users\Admin\AppData\Local\Temp\b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe"
    1⤵
    • Checks computer location settings
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3408
    • C:\Users\Admin\AppData\Local\Temp\3582-490\b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1332
      • C:\Users\Admin\AppData\Local\Temp\3582-490\b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe
        C:\Users\Admin\AppData\Local\Temp\3582-490\b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\crash_count.txt" --url=https://crashstats-collector.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win64 --annotation=prod=OperaDesktop --annotation=ver=108.0.5067.29 --initial-client-data=0x270,0x274,0x278,0x24c,0x27c,0x7ff6d16c8634,0x7ff6d16c8640,0x7ff6d16c8650
        3⤵
        • Executes dropped EXE
        PID:4240

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        ACROTE~1.EXE

        • Path C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE
        • Size 86KB
        • SHA256 ded54d1fcca07b6bff2bc3b9a1131eac29ff1f836e5d7a7c5c325ec5abe96e29
        • MD5 SHA1 SHA512 SSDEEP

        b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\b187749646e8d300aa2be5a51b412c6989fe6468ed3d33139d7dde2be265b6c5.exe
        • Size 5.5MB
        • SHA256 2019969a357dfd28d571c8db1ca72806796aace9fabdd8f2181095405e126484
        • MD5 SHA1 SHA512 SSDEEP

        memory/3408-104-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3408-105-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3408-107-0x0000000000400000-0x000000000041B000-memory.dmp