Analysis

  • max time kernel
    154s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    18-11-2020 16:58

General

  • Target

    HYDRA.exe

Malware Config

Extracted

Family

smokeloader

Version

2017

C2

http://92.53.105.14/

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Executes dropped EXE ⋅ 10 IoCs
  • Drops startup file ⋅ 1 IoCs
  • Loads dropped DLL ⋅ 12 IoCs
  • Adds Run key to start application ⋅ 2 TTPs 2 IoCs
  • Maps connected drives based on registry ⋅ 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Drops file in System32 directory ⋅ 2 IoCs
  • Enumerates physical storage devices ⋅ 1 TTPs

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

  • Creates scheduled task(s) ⋅ 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies data under HKEY_USERS ⋅ 21 IoCs
  • Suspicious behavior: EnumeratesProcesses ⋅ 64 IoCs
  • Suspicious behavior: MapViewOfSection ⋅ 2 IoCs
  • Suspicious use of AdjustPrivilegeToken ⋅ 6 IoCs
  • Suspicious use of WriteProcessMemory ⋅ 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HYDRA.exe
    "C:\Users\Admin\AppData\Local\Temp\HYDRA.exe"
    Loads dropped DLL
    Suspicious use of WriteProcessMemory
    PID:1028
    • C:\Users\Admin\AppData\Roaming\yaya.exe
      C:\Users\Admin\AppData\Roaming\yaya.exe
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe
        "C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe"
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        PID:1764
        • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
          "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\vuivrozc.cmdline"
          Suspicious use of WriteProcessMemory
          PID:1156
          • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
            C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDA88.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCDA87.tmp"
            PID:1956
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe"
          PID:1320
        • C:\Windows\System32\cmd.exe
          /K services.exe && clear
          Suspicious use of WriteProcessMemory
          PID:960
          • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\services.exe
            services.exe
            Executes dropped EXE
            Modifies data under HKEY_USERS
            Suspicious use of AdjustPrivilegeToken
            PID:940
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe"
          PID:1664
        • C:\Windows\System32\cmd.exe
          net localgroup administrators %username% /add
          PID:648
    • C:\Users\Admin\AppData\Roaming\va.exe
      C:\Users\Admin\AppData\Roaming\va.exe
      Executes dropped EXE
      Drops startup file
      PID:1212
    • C:\Users\Admin\AppData\Roaming\ufx.exe
      C:\Users\Admin\AppData\Roaming\ufx.exe
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1160
      • C:\ProgramData\ucp\usc.exe
        "C:\ProgramData\ucp\usc.exe" /ucp/usc.exe
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        PID:1116
        • C:\Windows\SysWOW64\SCHTASKS.exe
          SCHTASKS /Create /SC MINUTE /MO 10 /F /TN SystemOptimize /TR C:\ProgramData\ucp\usc.exe
          Creates scheduled task(s)
          PID:972
    • C:\Users\Admin\AppData\Roaming\sant.exe
      C:\Users\Admin\AppData\Roaming\sant.exe
      Executes dropped EXE
      Maps connected drives based on registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:1960
      • C:\Windows\SysWOW64\explorer.exe
        explorer.exe
        Adds Run key to start application
        PID:1708
    • C:\Users\Admin\AppData\Roaming\power.exe
      C:\Users\Admin\AppData\Roaming\power.exe
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:1292
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
        Suspicious use of AdjustPrivilegeToken
        PID:936
  • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\services.exe
    C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\services.exe
    Executes dropped EXE
    Modifies data under HKEY_USERS
    Suspicious use of AdjustPrivilegeToken
    Suspicious use of WriteProcessMemory
    PID:788
    • C:\Windows\TEMP\foxcon.exe
      "C:\Windows\TEMP\foxcon.exe"
      Executes dropped EXE
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious use of AdjustPrivilegeToken
      PID:1140

Network

MITRE ATT&CK Matrix

Collection

    Command and Control

      Credential Access

        Defense Evasion

        Execution

          Exfiltration

            Impact

              Initial Access

                Lateral Movement

                  Privilege Escalation

                    Replay Monitor

                    00:00 00:00

                    Downloads

                    • C:\ProgramData\ucp\usc.exe
                    • C:\Users\Admin\AppData\Local\Temp\RESDA88.tmp
                    • C:\Users\Admin\AppData\Local\Temp\vuivrozc.dll
                    • C:\Users\Admin\AppData\Local\Temp\vuivrozc.pdb
                    • C:\Users\Admin\AppData\Roaming\power.exe
                    • C:\Users\Admin\AppData\Roaming\sant.exe
                    • C:\Users\Admin\AppData\Roaming\sant.exe
                    • C:\Users\Admin\AppData\Roaming\ufx.exe
                    • C:\Users\Admin\AppData\Roaming\ufx.exe
                    • C:\Users\Admin\AppData\Roaming\va.exe
                    • C:\Users\Admin\AppData\Roaming\yaya.exe
                    • C:\Users\Admin\AppData\Roaming\yaya.exe
                    • C:\Windows\TEMP\foxcon.exe
                    • C:\Windows\Temp\foxcon.exe
                    • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\Newtonsoft.Json.dll
                    • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\foxcon.exe
                    • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\services.exe
                    • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\services.exe
                    • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\services.exe
                    • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe
                    • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe
                    • \??\c:\Users\Admin\AppData\Local\Temp\CSCDA87.tmp
                    • \??\c:\Users\Admin\AppData\Local\Temp\vuivrozc.0.cs
                    • \??\c:\Users\Admin\AppData\Local\Temp\vuivrozc.cmdline
                    • \ProgramData\ucp\usc.exe
                    • \ProgramData\ucp\usc.exe
                    • \ProgramData\ucp\usc.exe
                    • \Users\Admin\AppData\Roaming\power.exe
                    • \Users\Admin\AppData\Roaming\power.exe
                    • \Users\Admin\AppData\Roaming\sant.exe
                    • \Users\Admin\AppData\Roaming\sant.exe
                    • \Users\Admin\AppData\Roaming\ufx.exe
                    • \Users\Admin\AppData\Roaming\va.exe
                    • \Users\Admin\AppData\Roaming\va.exe
                    • \Users\Admin\AppData\Roaming\yaya.exe
                    • \Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe
                    • memory/788-54-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/788-53-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/856-36-0x000007FEF7140000-0x000007FEF73BA000-memory.dmp
                    • memory/936-63-0x0000000000000000-mapping.dmp
                    • memory/936-64-0x0000000072B50000-0x000000007323E000-memory.dmp
                    • memory/936-65-0x0000000000510000-0x0000000000511000-memory.dmp
                    • memory/936-66-0x00000000047C0000-0x00000000047C1000-memory.dmp
                    • memory/936-67-0x00000000025D0000-0x00000000025D1000-memory.dmp
                    • memory/936-68-0x00000000053A0000-0x00000000053A1000-memory.dmp
                    • memory/940-50-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/940-51-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/940-47-0x0000000000000000-mapping.dmp
                    • memory/972-34-0x0000000000000000-mapping.dmp
                    • memory/1116-31-0x0000000000000000-mapping.dmp
                    • memory/1140-60-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/1140-59-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/1140-56-0x0000000000000000-mapping.dmp
                    • memory/1156-39-0x0000000000000000-mapping.dmp
                    • memory/1160-9-0x0000000000000000-mapping.dmp
                    • memory/1212-5-0x0000000000000000-mapping.dmp
                    • memory/1292-21-0x0000000000000000-mapping.dmp
                    • memory/1708-37-0x0000000000000000-mapping.dmp
                    • memory/1708-38-0x0000000000520000-0x00000000007A1000-memory.dmp
                    • memory/1764-33-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/1764-35-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp
                    • memory/1764-25-0x0000000000000000-mapping.dmp
                    • memory/1956-42-0x0000000000000000-mapping.dmp
                    • memory/1960-15-0x0000000000000000-mapping.dmp
                    • memory/2028-23-0x0000000002B80000-0x0000000002B81000-memory.dmp
                    • memory/2028-11-0x0000000002B80000-0x0000000002B81000-memory.dmp
                    • memory/2028-1-0x0000000000000000-mapping.dmp