Analysis

  • max time kernel
    140s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/06/2024, 04:06

General

  • Target
    fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe
  • Size 2.6MB
  • Sample240612-ephmeszhrq
  • SHA256 fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 7 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 7 IoCs

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

  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe
    "C:\Users\Admin\AppData\Local\Temp\fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Modifies system certificate store
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:876
    • C:\Users\Admin\AppData\Local\Temp\fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe
      C:\Users\Admin\AppData\Local\Temp\fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe --type=crashpad-handler /prefetch:7 --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=Win32 --annotation=prod=OperaDesktop --annotation=ver=99.0.4788.31 --initial-client-data=0x2d8,0x2dc,0x2e0,0x2b4,0x2e4,0x74fb20d0,0x74fb20e0,0x74fb20ec
      2⤵
      • Loads dropped DLL
      PID:1104
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe" --version
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:1168
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\Assistant_110.0.5130.23_Setup.exe_sfx.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\Assistant_110.0.5130.23_Setup.exe_sfx.exe"
      2⤵
      • Executes dropped EXE
      PID:4376
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\assistant_installer.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\assistant_installer.exe" --version
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1232
      • C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\assistant_installer.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\assistant_installer.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=Win32 --annotation=prod=OperaDesktop --annotation=ver=110.0.5130.23 --initial-client-data=0x220,0x224,0x228,0x1fc,0x22c,0x7f30e8,0x7f30f4,0x7f3100
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:4988

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331.exe
        • Size 2.6MB
        • SHA256 fe4283cd3dcc11d2bce7e069cf0072e6c18e40fb89b4aef7e1057aa1c533f331
        • MD5 SHA1 SHA512 SSDEEP

        Assistant_110.0.5130.23_Setup.exe_sfx.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\Assistant_110.0.5130.23_Setup.exe_sfx.exe
        • Size 2.5MB
        • SHA256 e8fa79e22926ae07a998b5d2bb1be9309d0a15772ac72b88f4eed66052f33117
        • MD5 SHA1 SHA512 SSDEEP

        assistant_installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\assistant_installer.exe
        • Size 1.9MB
        • SHA256 c39c7199fa2221783ea61f085f484668e3c452706069b046cb0f4a9d4cb4c0a3
        • MD5 SHA1 SHA512 SSDEEP

        dbgcore.dll

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\dbgcore.dll
        • Size 166KB
        • SHA256 b69387b9284dc36d377e4066c4cf361dc65efc6c784af0f8666d9684fabd2d29
        • MD5 SHA1 SHA512 SSDEEP

        dbghelp.dll

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera Installer Temp\opera_package_202406120406531\assistant\dbghelp.dll
        • Size 1.7MB
        • SHA256 7f4a2cff90524b769781b763077be198d74834c6b576ef9f27132a415cbbaca8
        • MD5 SHA1 SHA512 SSDEEP

        Opera_installer_240612040653263876.dll

        • Path C:\Users\Admin\AppData\Local\Temp\Opera_installer_240612040653263876.dll
        • Size 4.4MB
        • SHA256 2c38bce7acbf817a52ef47da3ba3d21e93b0a141e05038ffeef9a77917c4e1d2
        • MD5 SHA1 SHA512 SSDEEP

        settings.dat

        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports\settings.dat
        • Size 40B
        • SHA256 ce2766524a7e1950faf0418b24cefe1728f6762dc6193dbff44c5377643ab050
        • MD5 SHA1 SHA512

        memory/876-37-0x00000000001C0000-0x00000000006D9000-memory.dmp

        memory/876-3-0x00000000001C0000-0x00000000006D9000-memory.dmp

        memory/1104-7-0x00000000001C0000-0x00000000006D9000-memory.dmp

        memory/1104-38-0x00000000001C0000-0x00000000006D9000-memory.dmp

        memory/1168-15-0x0000000000D80000-0x0000000001299000-memory.dmp

        memory/1168-19-0x0000000000D80000-0x0000000001299000-memory.dmp