Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    01/01/2024, 15:27

General

  • Target
    0d332c04780976b3cf6d505b5d7060c2f40399f581a8629885ad086e967f68a7.exe
  • Size 92KB
  • Sample240101-sv2t5sdbdr
  • SHA256 0d332c04780976b3cf6d505b5d7060c2f40399f581a8629885ad086e967f68a7
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Renames multiple (9950) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 6 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Discovers systems in the same network 1 TTPs 2 IoCs
  • NTFS ADS 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Yw3:exe
    C:\Users\Admin\AppData\Local\Yw3:exe 3 C:\Users\Admin\AppData\Local\VvDMxU\59a6z0.exe
    1⤵
    • Executes dropped EXE
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    PID:2840
  • C:\Windows\SysWOW64\net.exe
    C:\Windows\system32\net.exe view
    1⤵
    • Discovers systems in the same network
    PID:2812
  • C:\Users\Admin\AppData\Local\VvDMxU\59a6z0.exe
    C:\Users\Admin\AppData\Local\VvDMxU\59a6z0.exe 2
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • NTFS ADS
    • Suspicious use of WriteProcessMemory
    PID:2732
  • C:\Users\Admin\AppData\Local\LshO:exe
    C:\Users\Admin\AppData\Local\LshO:exe 1 C:\Users\Admin\AppData\Local\Temp\0d332c04780976b3cf6d505b5d7060c2f40399f581a8629885ad086e967f68a7.exe
    1⤵
    • Deletes itself
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2908
    • C:\Windows\SysWOW64\net.exe
      C:\Windows\system32\net.exe view \\CALKHSYM
      2⤵
      • Discovers systems in the same network
      PID:2304
  • C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Local\VvDMxU\59a6z0.exe 2
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1728
  • C:\Users\Admin\AppData\Local\Temp\0d332c04780976b3cf6d505b5d7060c2f40399f581a8629885ad086e967f68a7.exe
    "C:\Users\Admin\AppData\Local\Temp\0d332c04780976b3cf6d505b5d7060c2f40399f581a8629885ad086e967f68a7.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • NTFS ADS
    • Suspicious use of WriteProcessMemory
    PID:2964

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        LshO:exe

        • Path C:\Users\Admin\AppData\Local\LshO:exe
        • Size 92KB
        • SHA256 0d332c04780976b3cf6d505b5d7060c2f40399f581a8629885ad086e967f68a7
        • MD5 SHA1 SHA512 SSDEEP

        memory/2732-30-0x0000000000400000-0x000000000041A000-memory.dmp

        memory/2732-23-0x0000000000250000-0x0000000000256000-memory.dmp

        memory/2840-3258-0x0000000000400000-0x000000000041A000-memory.dmp

        memory/2840-14899-0x0000000000400000-0x000000000041A000-memory.dmp

        memory/2840-47087-0x0000000000400000-0x000000000041A000-memory.dmp

        memory/2908-182-0x0000000000400000-0x000000000041A000-memory.dmp

        memory/2964-0-0x0000000000400000-0x000000000041A000-memory.dmp

        memory/2964-1-0x0000000000260000-0x0000000000266000-memory.dmp

        memory/2964-15-0x0000000000400000-0x000000000041A000-memory.dmp