Analysis

  • max time kernel
    41s
  • max time network
    111s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    06/11/2020, 11:47

General

  • Target
    f0ca23d101868cd75aed85f10eda2c0067e7de7f81f84eee0232e9cd5f319889.exe
  • Size 978KB
  • Sample201106-ws86fm3dgs
  • SHA256 f0ca23d101868cd75aed85f10eda2c0067e7de7f81f84eee0232e9cd5f319889
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Echelon

    Echelon is a .NET stealer that targets passwords from browsers, email and cryptocurrency clients.

  • Echelon log file 1 IoCs

    Detects a log file produced by Echelon.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

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

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Program crash 1 IoCs
  • Delays execution with timeout.exe 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f0ca23d101868cd75aed85f10eda2c0067e7de7f81f84eee0232e9cd5f319889.exe
    "C:\Users\Admin\AppData\Local\Temp\f0ca23d101868cd75aed85f10eda2c0067e7de7f81f84eee0232e9cd5f319889.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3988
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\.cmd""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3280
      • C:\Windows\system32\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:796
      • C:\Users\Admin\AppData\Local\Temp\Decoder.exe
        "C:\Users\Admin\AppData\Local\Temp\\\Decoder.exe"
        3⤵
        • Executes dropped EXE
        PID:3476
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3476 -s 796
          4⤵
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1632
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2502.tmp.cmd""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3708
      • C:\Windows\system32\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:1608

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1632-23-0x0000000005260000-0x0000000005261000-memory.dmp

        memory/1632-17-0x0000000004D20000-0x0000000004D21000-memory.dmp

        memory/3476-15-0x0000000000CA0000-0x0000000000CA1000-memory.dmp

        memory/3476-14-0x00000000738E0000-0x0000000073FCE000-memory.dmp

        memory/3988-0-0x00007FFCC0C10000-0x00007FFCC15FC000-memory.dmp

        memory/3988-3-0x000000001B7E0000-0x000000001B850000-memory.dmp

        memory/3988-1-0x0000000000BE0000-0x0000000000BE1000-memory.dmp