Analysis

  • max time kernel
    17s
  • max time network
    62s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    25/06/2021, 07:30

General

  • Target
    d3d55fc7ded011f820f3e180dbeabbe8.exe
  • Size 174KB
  • Sample210625-2fklt5jtr2
  • SHA256 ee217c9b59c333cf854a2e6c7c8e3ecd82c36527143dfbc831ee449297e9c88a
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 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
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d3d55fc7ded011f820f3e180dbeabbe8.exe
    "C:\Users\Admin\AppData\Local\Temp\d3d55fc7ded011f820f3e180dbeabbe8.exe"
    1⤵
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1768
    • C:\Users\Admin\AppData\Roaming\2725453.exe
      "C:\Users\Admin\AppData\Roaming\2725453.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1076
    • C:\Users\Admin\AppData\Roaming\1835201.exe
      "C:\Users\Admin\AppData\Roaming\1835201.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:548
      • C:\Users\Admin\AppData\Roaming\WinHost\WinHoster.exe
        "C:\Users\Admin\AppData\Roaming\WinHost\WinHoster.exe"
        3⤵
        • Executes dropped EXE
        PID:820

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/548-78-0x0000000000250000-0x0000000000260000-memory.dmp

        memory/548-72-0x0000000000290000-0x0000000000291000-memory.dmp

        memory/548-80-0x0000000000260000-0x0000000000261000-memory.dmp

        memory/548-76-0x0000000000240000-0x0000000000241000-memory.dmp

        memory/820-90-0x0000000004B80000-0x0000000004B81000-memory.dmp

        memory/820-85-0x00000000001C0000-0x00000000001C1000-memory.dmp

        memory/1076-79-0x00000000001D0000-0x0000000000200000-memory.dmp

        memory/1076-77-0x00000000049C0000-0x00000000049C1000-memory.dmp

        memory/1076-73-0x0000000001170000-0x0000000001171000-memory.dmp

        memory/1768-60-0x00000000001A0000-0x00000000001A1000-memory.dmp

        memory/1768-63-0x0000000000310000-0x000000000032F000-memory.dmp

        memory/1768-62-0x0000000000300000-0x0000000000301000-memory.dmp

        memory/1768-64-0x0000000000330000-0x0000000000331000-memory.dmp

        memory/1768-65-0x000000001AFE0000-0x000000001AFE2000-memory.dmp