Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 14:49

General

  • Target

    04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe

  • Size

    233KB

  • MD5

    f81a2c93c44bfec11cdd55eb53dde5df

  • SHA1

    45cb3d7066113e86fff081e309265a797af0ef51

  • SHA256

    04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482

  • SHA512

    c9fc2a6239235aa0bf24e700665666c8500000bcc76dc8e26922f8cfc0f961949bf7fa04bf9877ea3254b9a5879752d1b3f75d945318c246770b507bc0b0199e

  • SSDEEP

    3072:LefNGJ/ceeYkb2BNog9oADOF4t0wC0NnpXIpKjVEqLDOO7n+MnIitmjXO9ZJwVQk:Le1GM+NobFm0wC0NpYpuVEqSFOTF

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.

  • 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
  • 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).

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe
    "C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\avooyfxp\
      2⤵
        PID:2076
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mpmfwysi.exe" C:\Windows\SysWOW64\avooyfxp\
        2⤵
          PID:2028
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create avooyfxp binPath= "C:\Windows\SysWOW64\avooyfxp\mpmfwysi.exe /d\"C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description avooyfxp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start avooyfxp
          2⤵
          • Launches sc.exe
          PID:2468
        • 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:1996
      • C:\Windows\SysWOW64\avooyfxp\mpmfwysi.exe
        C:\Windows\SysWOW64\avooyfxp\mpmfwysi.exe /d"C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2760
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2572

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.3MB

        MD5

        8d63939c9a7fc42675d5a895fd1b4192

        SHA1

        faec7635c469766e62718e78df7fd2007286f3cc

        SHA256

        b0e802088293303f6a0af1193e7980c19502bfdd79f4a8eefa24b705b7d18549

        SHA512

        869709891b357cb6507d3e57d3f8f2981ea0ec4d4a14ba16e3f4d7353e8d6bbc07592d4d7df4da1b8025255cb731c626165a32f9ac577bb1348cd905680adb88

      • memory/2208-1-0x00000000004D0000-0x00000000005D0000-memory.dmp

        Filesize

        1024KB

      • memory/2208-3-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2208-4-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/2208-7-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/2572-35-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-36-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-11-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/2572-61-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/2572-14-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/2572-19-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/2572-57-0x0000000000310000-0x0000000000317000-memory.dmp

        Filesize

        28KB

      • memory/2572-20-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/2572-22-0x0000000001960000-0x0000000001B6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2572-25-0x0000000001960000-0x0000000001B6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2572-26-0x00000000000C0000-0x00000000000C6000-memory.dmp

        Filesize

        24KB

      • memory/2572-29-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-32-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-33-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-34-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-56-0x0000000005470000-0x000000000587B000-memory.dmp

        Filesize

        4.0MB

      • memory/2572-37-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2572-38-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-39-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-40-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-41-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-42-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-43-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-44-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-45-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-46-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-47-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-48-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2572-49-0x0000000000230000-0x0000000000235000-memory.dmp

        Filesize

        20KB

      • memory/2572-52-0x0000000000230000-0x0000000000235000-memory.dmp

        Filesize

        20KB

      • memory/2572-53-0x0000000005470000-0x000000000587B000-memory.dmp

        Filesize

        4.0MB

      • memory/2760-9-0x0000000000500000-0x0000000000600000-memory.dmp

        Filesize

        1024KB

      • memory/2760-17-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/2760-10-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB