Analysis

  • max time kernel
    123s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/09/2022, 21:34

General

  • Target
    0a31021b52d07ba0d233bf5a2f7f84cb.exe
  • Size 3.6MB
  • Sample220906-1e3eqsffhl
  • SHA256 c077e42c0c44d125d58bc2aeeffc81f3b4fbeebec5c7ab809b31f4e06b46a2c2
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

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

  • Downloads MZ/PE file
  • Executes dropped EXE 6 IoCs
  • UPX packed file 7 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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). Likely ransomware behaviour.

  • Modifies registry class 1 IoCs
  • Modifies system certificate store 2 TTPs 13 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0a31021b52d07ba0d233bf5a2f7f84cb.exe
    "C:\Users\Admin\AppData\Local\Temp\0a31021b52d07ba0d233bf5a2f7f84cb.exe"
    1⤵
    • Modifies system executable filetype association
    • Checks computer location settings
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:408
    • C:\Users\Admin\AppData\Local\Temp\3582-490\0a31021b52d07ba0d233bf5a2f7f84cb.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\0a31021b52d07ba0d233bf5a2f7f84cb.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Enumerates connected drives
      • Modifies system certificate store
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:308
      • C:\Users\Admin\AppData\Local\Temp\3582-490\0a31021b52d07ba0d233bf5a2f7f84cb.exe
        C:\Users\Admin\AppData\Local\Temp\3582-490\0a31021b52d07ba0d233bf5a2f7f84cb.exe --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\crash_count.txt" --url=https://crashstats-collector.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktopGX --annotation=ver=72.0.3815.459 --initial-client-data=0x2bc,0x2c0,0x2c4,0x298,0x2c8,0x73fca648,0x73fca658,0x73fca664
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:3760
      • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\0a31021b52d07ba0d233bf5a2f7f84cb.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\0a31021b52d07ba0d233bf5a2f7f84cb.exe" --version
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:3912
      • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\_sfx.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\_sfx.exe"
        3⤵
        • Executes dropped EXE
        PID:620
      • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\assistant_installer.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\assistant_installer.exe" --version
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2276
        • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\assistant_installer.exe
          "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\assistant_installer.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\crash_count.txt" --url=https://crashstats-collector.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktopGX --annotation=ver=73.0.3856.382 --initial-client-data=0x26c,0x270,0x274,0x248,0x278,0x1194f48,0x1194f58,0x1194f64
          4⤵
          • Executes dropped EXE
          PID:2712

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        0a31021b52d07ba0d233bf5a2f7f84cb.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\0a31021b52d07ba0d233bf5a2f7f84cb.exe
        • Size 3.5MB
        • SHA256 98373579e64bb3e6455474c3612d1b849e5562ea230c5b50f08c7ff6a5998e32
        • MD5 SHA1 SHA512 SSDEEP

        _sfx.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\_sfx.exe
        • Size 1.4MB
        • SHA256 e950f17f4181009eeafa9f5306e8a9dfd26d88ca63b1838f44ff0efc738e7d1f
        • MD5 SHA1 SHA512 SSDEEP

        _sfx.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\_sfx.exe
        • Size 1.4MB
        • SHA256 e950f17f4181009eeafa9f5306e8a9dfd26d88ca63b1838f44ff0efc738e7d1f
        • MD5 SHA1 SHA512 SSDEEP

        assistant_installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\assistant_installer.exe
        • Size 1.8MB
        • SHA256 afe569ce9e4f71c23ba5f6e8fd32be62ac9538e397cde8f2ecbe46faa721242a
        • MD5 SHA1 SHA512 SSDEEP

        assistant_installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202209062134491\assistant\assistant_installer.exe
        • Size 1.8MB
        • SHA256 afe569ce9e4f71c23ba5f6e8fd32be62ac9538e397cde8f2ecbe46faa721242a
        • MD5 SHA1 SHA512 SSDEEP

        0a31021b52d07ba0d233bf5a2f7f84cb.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\0a31021b52d07ba0d233bf5a2f7f84cb.exe
        • Size 3.5MB
        • SHA256 98373579e64bb3e6455474c3612d1b849e5562ea230c5b50f08c7ff6a5998e32
        • MD5 SHA1 SHA512 SSDEEP

        0a31021b52d07ba0d233bf5a2f7f84cb.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\0a31021b52d07ba0d233bf5a2f7f84cb.exe
        • Size 3.5MB
        • SHA256 98373579e64bb3e6455474c3612d1b849e5562ea230c5b50f08c7ff6a5998e32
        • MD5 SHA1 SHA512 SSDEEP

        0a31021b52d07ba0d233bf5a2f7f84cb.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\0a31021b52d07ba0d233bf5a2f7f84cb.exe
        • Size 3.5MB
        • SHA256 98373579e64bb3e6455474c3612d1b849e5562ea230c5b50f08c7ff6a5998e32
        • MD5 SHA1 SHA512 SSDEEP

        Opera_installer_220906213446415308.dll

        • Path C:\Users\Admin\AppData\Local\Temp\Opera_installer_220906213446415308.dll
        • Size 4.7MB
        • SHA256 5397ad2db5a1c1adc7478f2b2c374c613c220fa08ed027308a2bda3276d66a60
        • MD5 SHA1 SHA512 SSDEEP

        Opera_installer_2209062134468373760.dll

        • Path C:\Users\Admin\AppData\Local\Temp\Opera_installer_2209062134468373760.dll
        • Size 4.7MB
        • SHA256 5397ad2db5a1c1adc7478f2b2c374c613c220fa08ed027308a2bda3276d66a60
        • MD5 SHA1 SHA512 SSDEEP

        Opera_installer_2209062134489783912.dll

        • Path C:\Users\Admin\AppData\Local\Temp\Opera_installer_2209062134489783912.dll
        • Size 4.7MB
        • SHA256 5397ad2db5a1c1adc7478f2b2c374c613c220fa08ed027308a2bda3276d66a60
        • MD5 SHA1 SHA512 SSDEEP

        settings.dat

        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports\settings.dat
        • Size 40B
        • SHA256 43326489d1beecf8f1750f193eaa18f425ab69d97ad33a8d7041ab8a3c130e87
        • MD5 SHA1 SHA512

        settings.dat

        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports\settings.dat
        • Size 40B
        • SHA256 43326489d1beecf8f1750f193eaa18f425ab69d97ad33a8d7041ab8a3c130e87
        • MD5 SHA1 SHA512

        memory/308-137-0x0000000000400000-0x000000000091D000-memory.dmp

        memory/3760-139-0x0000000000400000-0x000000000091D000-memory.dmp

        memory/3912-145-0x0000000000400000-0x000000000091D000-memory.dmp