Analysis

  • max time kernel
    145s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-09-2024 04:20

General

  • Target

    d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe

  • Size

    10.3MB

  • MD5

    7add49d3f94626db3bfd88652c55403b

  • SHA1

    c99c8680050272cade3963627fa87e697b4ee564

  • SHA256

    d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f

  • SHA512

    19edd3367327213abc11f3d696b46cdd4184a74e6653e43b0283aebcd0de135f43e92b69a1906328c318a5e7a3c06806665a015cbe70e5ee9e13e91e7654ca4f

  • SSDEEP

    196608:9I+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++G:9

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

  • Tofsee

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

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 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
  • 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe
    "C:\Users\Admin\AppData\Local\Temp\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3808
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\aaftwqcu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1440
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\trgsmitj.exe" C:\Windows\SysWOW64\aaftwqcu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2360
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create aaftwqcu binPath= "C:\Windows\SysWOW64\aaftwqcu\trgsmitj.exe /d\"C:\Users\Admin\AppData\Local\Temp\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4344
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description aaftwqcu "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4892
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start aaftwqcu
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3212
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:4760
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3808 -s 1028
      2⤵
      • Program crash
      PID:3804
  • C:\Windows\SysWOW64\aaftwqcu\trgsmitj.exe
    C:\Windows\SysWOW64\aaftwqcu\trgsmitj.exe /d"C:\Users\Admin\AppData\Local\Temp\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4176
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:1432
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4176 -s 512
      2⤵
      • Program crash
      PID:4672
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3808 -ip 3808
    1⤵
      PID:3868
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4176 -ip 4176
      1⤵
        PID:2856

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        13.1MB

        MD5

        9277bd5a2eaac18df9b2621e6d61124a

        SHA1

        dea7850d74593c9d23b56b40ac23c25dcac25ecf

        SHA256

        c22352f1c4c8c6f467cd1acaf807cab43a1747ec3c3d954dce3f8d73c1cef7ae

        SHA512

        f25bc518f1b58b979f57bc1f05cc5e6eb48869cc456581435d2ce358040c8228de008b951465f8774a8d73e2bcbb7f7e51a7ad0f430e9c6743776b06faaccdaa

      • memory/1432-13-0x00000000008F0000-0x0000000000905000-memory.dmp

        Filesize

        84KB

      • memory/1432-15-0x00000000008F0000-0x0000000000905000-memory.dmp

        Filesize

        84KB

      • memory/1432-16-0x00000000008F0000-0x0000000000905000-memory.dmp

        Filesize

        84KB

      • memory/3808-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3808-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3808-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3808-8-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/3808-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3808-1-0x0000000000B40000-0x0000000000C40000-memory.dmp

        Filesize

        1024KB

      • memory/4176-11-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/4176-12-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/4176-18-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB