Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    25/03/2024, 15:47

General

  • Target

    de5f0b876145c3072389c0af52539a06.exe

  • Size

    11.6MB

  • MD5

    de5f0b876145c3072389c0af52539a06

  • SHA1

    8fcb3d87bdb58c8f5eb5cd5d439fb08c88e19c23

  • SHA256

    fbc03327661ed973c859257eb8ad4941108669c968de30a2ef77af775fe0e960

  • SHA512

    858c78636b4c50791353b11df415e51bb8e3a2da4e2cda94ec2468a611db42ce30c3c3af3fa402825b2010eaad6f982088b293ddcc592726531933a4549092fc

  • SSDEEP

    49152:L88888888888888888888888888888888888888888888888888888888888888T:

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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).

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe
    "C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2328
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mfnklunj\
      2⤵
        PID:1712
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\veuijxms.exe" C:\Windows\SysWOW64\mfnklunj\
        2⤵
          PID:1964
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mfnklunj binPath= "C:\Windows\SysWOW64\mfnklunj\veuijxms.exe /d\"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mfnklunj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mfnklunj
          2⤵
          • Launches sc.exe
          PID:2592
        • 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:868
      • C:\Windows\SysWOW64\mfnklunj\veuijxms.exe
        C:\Windows\SysWOW64\mfnklunj\veuijxms.exe /d"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2756
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2464

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        2.3MB

        MD5

        9e47bbde4eb2bcd36749bd71b6cdb3fd

        SHA1

        49761226378ac20a28b6bc0db9677836226c2ea4

        SHA256

        763f2ff2fc525efeaa5b12b3eb5d0ae50dcd3d040f59c8d0898b94cfb7bdad9f

        SHA512

        ef0e1a4b817e1700f70997383176c22f43d8fe29f922e7b326a5ce6ff9e699099ee6ed19474b3557c8aec2b817a238e2147fb314937587bb9c14ad7b99263b55

      • C:\Windows\SysWOW64\mfnklunj\veuijxms.exe

        Filesize

        2.6MB

        MD5

        133f6ccff654ab3c26c8b1cc0d0d2fd8

        SHA1

        9b65290ae3f5447511c76fa413a0de7381ba3869

        SHA256

        11c2e9126ff4d05d9adf6d3ba62fc71b07bf21a234e1f2abfa1529b85495e6fc

        SHA512

        92fc259383d86a37a8c7100d06fd316ca6bacfdab2e3757a6bcb93047492b49c14adeae6ceacd85f5c1be088b057b4033910d20f4582a2e3e0ff32e6e439f262

      • memory/2328-3-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2328-1-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

        Filesize

        1024KB

      • memory/2328-4-0x0000000000400000-0x0000000002C68000-memory.dmp

        Filesize

        40.4MB

      • memory/2328-8-0x0000000000400000-0x0000000002C68000-memory.dmp

        Filesize

        40.4MB

      • memory/2464-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2464-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2464-9-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2464-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2464-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2464-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2756-14-0x0000000002D90000-0x0000000002E90000-memory.dmp

        Filesize

        1024KB

      • memory/2756-17-0x0000000000400000-0x0000000002C68000-memory.dmp

        Filesize

        40.4MB