Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/03/2023, 17:35

General

  • Target
    Test.exe
  • Size 563KB
  • Sample230331-v56l7add6x
  • SHA256 c3f3659442a27afa1a9e8cbc18479f9c88e209b0429b30b695085746f1edb39e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\Temp\hsperfdata_Admin\!_INFO.txt

Ransom Note
  • WARNING! YOUR FILES ARE ENCRYPTED! Don’t worry, your files are safe, provided that you are willing to pay the ransom. Any forced shutdown or attempts to restore your files with the thrid-party software will be damage your files permanently! Do not rename your files. It will damage it. The only way to decrypt your files safely is to buy the special decryption software from us. Before paying you can send us up to 2 files for free decryption as guarantee. No database files for test. Send pictures, text, doc files. (files no more than 1mb) You can contact us with the following email [email protected] [email protected] Send us this ID or this file in first email ID: 6XSJPpDFGStCH1FNpiAaexScPo0ha1vujSF86KxHWHo=:b169ebacc1fdf8cb1c9ed4d8f083b48dc29218ea8c94090465563c3d36c3600f

Signatures

  • Modifies extensions of user files 12 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 16 IoCs

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

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 52 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Test.exe
    "C:\Users\Admin\AppData\Local\Temp\Test.exe"
    1⤵
    • Modifies extensions of user files
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    PID:1120
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:1008

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini

        • Path C:\$Recycle.Bin\S-1-5-21-1013461898-3711306144-4198452673-1000\desktop.ini
        • Size 129B
        • SHA256 e1b9ce9b57957b1a0607a72a057d6b7a9b34ea60f3f8aa8f38a3af979bd23066
        • MD5 SHA1 SHA512

        MicrosoftEdgeUpdateSetup_X86_1.3.173.45.exe.360

        • Path C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\Install\{65949401-7B2D-4281-A148-DEA6D44CB2BC}\MicrosoftEdgeUpdateSetup_X86_1.3.173.45.exe.360
        • Size 1.5MB
        • SHA256 b356de3e3786aca76e511a6468e3976ce608d1278decb1017e87d03d94626121
        • MD5 SHA1 SHA512 SSDEEP

        StartUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
        • Size 14KB
        • SHA256 c545e9c063692010ff9c02cf9d39151971e213e626701cf5fe0e38f31974e8fc
        • MD5 SHA1 SHA512 SSDEEP

        StartUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
        • Size 14KB
        • SHA256 27f7ba5fcb8d4fa37e1019ebc93ec57c9f6d8baac09568517fccb849c3bcc520
        • MD5 SHA1 SHA512 SSDEEP

        __lock_XXX__

        • Path C:\Users\Admin\AppData\Local\Temp\1567250093\__lock_XXX__
        • Size 177B
        • SHA256 7a2f326ca41dd6a595b9153391afca052b23ca5fa6827176d9f838f9abfd97bb
        • MD5 SHA1 SHA512

        !_INFO.txt

        • Path C:\Users\Admin\AppData\Local\Temp\hsperfdata_Admin\!_INFO.txt
        • Size 810B
        • SHA256 fe763ae57fded8f889ff08cb4f42215be9cd081e61e1f52d91b3b9c6b2883d01
        • MD5 SHA1 SHA512

        memory/1120-1655-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-11576-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-5856-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-2619-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-133-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-8524-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-11315-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-3778-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-13108-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-14686-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-17649-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-20410-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-1316-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-1308-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-22906-0x0000000000930000-0x0000000000AC7000-memory.dmp

        memory/1120-26653-0x0000000000930000-0x0000000000AC7000-memory.dmp