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Analysis

  • max time kernel
    142s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231020-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/11/2023, 20:45

General

  • Target

    7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe

  • Size

    338KB

  • MD5

    5c5387efb7f70cd46012c6f8f4cc0e1a

  • SHA1

    c2ad2a7be652d8b73cdeb794b498c03d8f783bc4

  • SHA256

    7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2

  • SHA512

    bc6a38573e87fc6bc7b945ee76f5b8102e5adfa1ff6262356212a0fb66f2b4cb071193df75f05da715627d1d4c5cb2cd733f786371bf271e5ee94f88557de65d

  • SSDEEP

    3072:M9xApN8qo8I+HI0C+iUn9wYaA8MqfvJLAiT12Rerybp80C:wTqoQHIbYatRJLAiT3ry3

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

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

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

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

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe
    "C:\Users\Admin\AppData\Local\Temp\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4960
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mgesgox\
      2⤵
        PID:5072
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\csodyqow.exe" C:\Windows\SysWOW64\mgesgox\
        2⤵
          PID:3644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mgesgox binPath= "C:\Windows\SysWOW64\mgesgox\csodyqow.exe /d\"C:\Users\Admin\AppData\Local\Temp\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4460
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mgesgox "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:5080
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mgesgox
          2⤵
          • Launches sc.exe
          PID:4820
        • 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 Windows Firewall
          PID:2016
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 660
          2⤵
          • Program crash
          PID:4488
      • C:\Windows\SysWOW64\mgesgox\csodyqow.exe
        C:\Windows\SysWOW64\mgesgox\csodyqow.exe /d"C:\Users\Admin\AppData\Local\Temp\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2528
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:576
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2528 -s 516
          2⤵
          • Program crash
          PID:3108
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4960 -ip 4960
        1⤵
          PID:4588
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2528 -ip 2528
          1⤵
            PID:1840

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\csodyqow.exe

            Filesize

            13.7MB

            MD5

            a06046248cbafeaddd5355b47b1bd69d

            SHA1

            70e8ab345d5a47453fb6cc63dfc02404a9269807

            SHA256

            9b60db73b46a3995b078e2864576440f979addc29ba36b3579c1600d3b1face4

            SHA512

            0c5eba7c5fcf28528fc6da63e0da087e5a36060114e6a5fe11bb120b1cd5d17ce8b22bfc775f14996945f6f6bfd078330cebc7cb5629ca54f780283fc08c1e90

          • C:\Windows\SysWOW64\mgesgox\csodyqow.exe

            Filesize

            13.7MB

            MD5

            a06046248cbafeaddd5355b47b1bd69d

            SHA1

            70e8ab345d5a47453fb6cc63dfc02404a9269807

            SHA256

            9b60db73b46a3995b078e2864576440f979addc29ba36b3579c1600d3b1face4

            SHA512

            0c5eba7c5fcf28528fc6da63e0da087e5a36060114e6a5fe11bb120b1cd5d17ce8b22bfc775f14996945f6f6bfd078330cebc7cb5629ca54f780283fc08c1e90

          • memory/576-44-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-53-0x0000000007940000-0x0000000007D4B000-memory.dmp

            Filesize

            4.0MB

          • memory/576-34-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-35-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-36-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-37-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-11-0x0000000000A00000-0x0000000000A15000-memory.dmp

            Filesize

            84KB

          • memory/576-38-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-39-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-57-0x0000000002DE0000-0x0000000002DE7000-memory.dmp

            Filesize

            28KB

          • memory/576-19-0x0000000000A00000-0x0000000000A15000-memory.dmp

            Filesize

            84KB

          • memory/576-21-0x0000000002800000-0x0000000002A0F000-memory.dmp

            Filesize

            2.1MB

          • memory/576-24-0x0000000002800000-0x0000000002A0F000-memory.dmp

            Filesize

            2.1MB

          • memory/576-25-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

            Filesize

            24KB

          • memory/576-28-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-31-0x0000000000A00000-0x0000000000A15000-memory.dmp

            Filesize

            84KB

          • memory/576-32-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-33-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-40-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-43-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-17-0x0000000000A00000-0x0000000000A15000-memory.dmp

            Filesize

            84KB

          • memory/576-56-0x0000000007940000-0x0000000007D4B000-memory.dmp

            Filesize

            4.0MB

          • memory/576-52-0x0000000002DD0000-0x0000000002DD5000-memory.dmp

            Filesize

            20KB

          • memory/576-49-0x0000000002DD0000-0x0000000002DD5000-memory.dmp

            Filesize

            20KB

          • memory/576-48-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-47-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-46-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-45-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-41-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/576-42-0x0000000001FD0000-0x0000000001FE0000-memory.dmp

            Filesize

            64KB

          • memory/2528-13-0x0000000000400000-0x000000000089D000-memory.dmp

            Filesize

            4.6MB

          • memory/2528-12-0x0000000000400000-0x000000000089D000-memory.dmp

            Filesize

            4.6MB

          • memory/2528-10-0x0000000000AE0000-0x0000000000BE0000-memory.dmp

            Filesize

            1024KB

          • memory/4960-1-0x0000000000A20000-0x0000000000B20000-memory.dmp

            Filesize

            1024KB

          • memory/4960-4-0x0000000000400000-0x000000000089D000-memory.dmp

            Filesize

            4.6MB

          • memory/4960-8-0x0000000000A00000-0x0000000000A13000-memory.dmp

            Filesize

            76KB

          • memory/4960-7-0x0000000000400000-0x000000000089D000-memory.dmp

            Filesize

            4.6MB

          • memory/4960-2-0x0000000000A00000-0x0000000000A13000-memory.dmp

            Filesize

            76KB