Resubmissions

19-01-2021 19:24

210119-s26yznnqsn 10

19-11-2020 13:14

201119-s41ec6lt86 10

Analysis

  • max time kernel
    1803s
  • max time network
    1815s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    19-11-2020 13:14

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.

  • Suspicious use of NtCreateUserProcessOtherParentProcess ⋅ 2 IoCs
  • Executes dropped EXE ⋅ 10 IoCs
  • Drops startup file ⋅ 1 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.

  • Enumerates physical storage devices ⋅ 1 TTPs

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

  • Creates scheduled task(s) ⋅ 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses ⋅ 64 IoCs
  • Suspicious behavior: MapViewOfSection ⋅ 2 IoCs
  • Suspicious use of AdjustPrivilegeToken ⋅ 8 IoCs
  • Suspicious use of WriteProcessMemory ⋅ 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HYDRA.exe
    "C:\Users\Admin\AppData\Local\Temp\HYDRA.exe"
    Suspicious use of WriteProcessMemory
    PID:4092
    • C:\Users\Admin\AppData\Roaming\yaya.exe
      C:\Users\Admin\AppData\Roaming\yaya.exe
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2696
      • 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:2920
        • 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\qg_8qucl.cmdline"
          Suspicious use of WriteProcessMemory
          PID:1560
          • 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\RES912B.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC912A.tmp"
            PID:556
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe"
          PID:2912
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe"
          PID:4016
    • C:\Users\Admin\AppData\Roaming\va.exe
      C:\Users\Admin\AppData\Roaming\va.exe
      Executes dropped EXE
      Drops startup file
      PID:2684
    • C:\Users\Admin\AppData\Roaming\ufx.exe
      C:\Users\Admin\AppData\Roaming\ufx.exe
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2824
      • 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:1832
        • 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:212
    • 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:3828
      • C:\Windows\SysWOW64\explorer.exe
        explorer.exe
        Adds Run key to start application
        PID:2848
    • C:\Users\Admin\AppData\Roaming\power.exe
      C:\Users\Admin\AppData\Roaming\power.exe
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:3388
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
        Suspicious use of AdjustPrivilegeToken
        PID:1152
  • \??\c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s seclogon
    Suspicious use of NtCreateUserProcessOtherParentProcess
    Suspicious use of AdjustPrivilegeToken
    Suspicious use of WriteProcessMemory
    PID:2888
  • C:\ProgramData\ucp\usc.exe
    C:\ProgramData\ucp\usc.exe
    Executes dropped EXE
    Suspicious use of AdjustPrivilegeToken
    Suspicious use of WriteProcessMemory
    PID:3744
    • 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:640
  • C:\ProgramData\ucp\usc.exe
    C:\ProgramData\ucp\usc.exe
    Executes dropped EXE
    Suspicious use of AdjustPrivilegeToken
    Suspicious use of WriteProcessMemory
    PID:1100
    • 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:4004
  • C:\ProgramData\ucp\usc.exe
    C:\ProgramData\ucp\usc.exe
    Executes dropped EXE
    Suspicious use of AdjustPrivilegeToken
    Suspicious use of WriteProcessMemory
    PID:364
    • 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:3980

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:\ProgramData\ucp\usc.exe
                    • C:\ProgramData\ucp\usc.exe
                    • C:\ProgramData\ucp\usc.exe
                    • C:\ProgramData\ucp\usc.exe
                    • C:\Users\Admin\AppData\Local\Temp\RES912B.tmp
                    • C:\Users\Admin\AppData\Local\Temp\qg_8qucl.dll
                    • C:\Users\Admin\AppData\Local\Temp\qg_8qucl.pdb
                    • C:\Users\Admin\AppData\Roaming\power.exe
                    • 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\va.exe
                    • C:\Users\Admin\AppData\Roaming\yaya.exe
                    • C:\Users\Admin\AppData\Roaming\yaya.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\CSC912A.tmp
                    • \??\c:\Users\Admin\AppData\Local\Temp\qg_8qucl.0.cs
                    • \??\c:\Users\Admin\AppData\Local\Temp\qg_8qucl.cmdline
                    • memory/212-22-0x0000000000000000-mapping.dmp
                    • memory/556-26-0x0000000000000000-mapping.dmp
                    • memory/640-47-0x0000000000000000-mapping.dmp
                    • memory/1152-43-0x00000000083E0000-0x00000000083E1000-memory.dmp
                    • memory/1152-45-0x00000000094D0000-0x00000000094D1000-memory.dmp
                    • memory/1152-44-0x00000000087F0000-0x00000000087F1000-memory.dmp
                    • memory/1152-42-0x0000000008370000-0x0000000008371000-memory.dmp
                    • memory/1152-41-0x0000000008000000-0x0000000008001000-memory.dmp
                    • memory/1152-40-0x0000000007F90000-0x0000000007F91000-memory.dmp
                    • memory/1152-39-0x0000000007DC0000-0x0000000007DC1000-memory.dmp
                    • memory/1152-38-0x00000000074E0000-0x00000000074E1000-memory.dmp
                    • memory/1152-34-0x0000000000000000-mapping.dmp
                    • memory/1152-35-0x0000000071BC0000-0x00000000722AE000-memory.dmp
                    • memory/1152-36-0x0000000006F00000-0x0000000006F01000-memory.dmp
                    • memory/1152-37-0x0000000007690000-0x0000000007691000-memory.dmp
                    • memory/1560-23-0x0000000000000000-mapping.dmp
                    • memory/1832-18-0x0000000000000000-mapping.dmp
                    • memory/2684-2-0x0000000000000000-mapping.dmp
                    • memory/2696-0-0x0000000000000000-mapping.dmp
                    • memory/2824-4-0x0000000000000000-mapping.dmp
                    • memory/2848-31-0x0000000000000000-mapping.dmp
                    • memory/2848-33-0x0000000000B90000-0x0000000000FCF000-memory.dmp
                    • memory/2848-32-0x0000000000B90000-0x0000000000FCF000-memory.dmp
                    • memory/2920-15-0x0000000000000000-mapping.dmp
                    • memory/2920-21-0x00007FFFCF010000-0x00007FFFCF9B0000-memory.dmp
                    • memory/3388-12-0x0000000000000000-mapping.dmp
                    • memory/3828-9-0x0000000000000000-mapping.dmp
                    • memory/3980-51-0x0000000000000000-mapping.dmp
                    • memory/4004-49-0x0000000000000000-mapping.dmp