Analysis

  • max time kernel
    150s
  • max time network
    113s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    09/11/2020, 20:33

General

  • Target
    Rechnung.exe
  • Size 599KB
  • Sample201109-86weepnfws
  • SHA256 a837374ed66cc50cb5760f0f948db288657fd0891687f43df9b9260dfb71449c
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • HawkEye

    HawkEye is a malware kit that has seen continuous development since at least 2013.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Uses the VBS compiler for execution 1 TTPs
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 886 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Rechnung.exe
    "C:\Users\Admin\AppData\Local\Temp\Rechnung.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:884
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
        PID:640
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        2⤵
          PID:2092
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          2⤵
            PID:2904
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            2⤵
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1096
            • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
              C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"
              3⤵
                PID:2192
              • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
                C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"
                3⤵
                  PID:3800

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/884-0-0x0000000073A30000-0x000000007411E000-memory.dmp

                  memory/884-1-0x00000000007C0000-0x00000000007C1000-memory.dmp

                  memory/884-3-0x0000000004F90000-0x000000000501B000-memory.dmp

                  memory/884-4-0x0000000005730000-0x00000000057B8000-memory.dmp

                  memory/1096-15-0x0000000005570000-0x0000000005571000-memory.dmp

                  memory/1096-17-0x00000000084A0000-0x00000000084A1000-memory.dmp

                  memory/1096-12-0x00000000055D0000-0x00000000055D1000-memory.dmp

                  memory/1096-13-0x0000000005B70000-0x0000000005B71000-memory.dmp

                  memory/1096-14-0x0000000005670000-0x0000000005671000-memory.dmp

                  memory/1096-16-0x0000000005840000-0x0000000005841000-memory.dmp

                  memory/1096-9-0x0000000073A30000-0x000000007411E000-memory.dmp

                  memory/1096-18-0x0000000007490000-0x0000000007492000-memory.dmp

                  memory/1096-7-0x0000000000400000-0x0000000000488000-memory.dmp

                  memory/2192-21-0x0000000000400000-0x000000000041B000-memory.dmp

                  memory/2192-19-0x0000000000400000-0x000000000041B000-memory.dmp

                  memory/3800-23-0x0000000000400000-0x0000000000458000-memory.dmp

                  memory/3800-25-0x0000000000400000-0x0000000000458000-memory.dmp