Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    07-07-2024 01:19

General

  • Target

    f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe

  • Size

    229KB

  • MD5

    b40b6b9bd2f7d17a65c72469ee2e2cfa

  • SHA1

    859ffdfda568b34e1c3ded9f846dea6e8774f5b5

  • SHA256

    f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583

  • SHA512

    7a4b7171000f8dad0eed766e212ee6c9ebf6431175291442524383232f5455f6bc3e8b224c31dc8bf48ad0cba4ef7637edd4dcc8f32e48f93fb9ea7036adeae1

  • SSDEEP

    3072:DI/quXXuYu/IdYKV97eRuWYxYBouZdSzBS7sy4iIb:DYqKXzEIzSbYxYTAS7W

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) 2 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).

  • 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.

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe
    "C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1316
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ttmyrqv\
      2⤵
        PID:2464
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bnzebhgu.exe" C:\Windows\SysWOW64\ttmyrqv\
        2⤵
          PID:2964
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ttmyrqv binPath= "C:\Windows\SysWOW64\ttmyrqv\bnzebhgu.exe /d\"C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2824
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ttmyrqv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2104
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ttmyrqv
          2⤵
          • Launches sc.exe
          PID:2648
        • 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
          PID:2908
      • C:\Windows\SysWOW64\ttmyrqv\bnzebhgu.exe
        C:\Windows\SysWOW64\ttmyrqv\bnzebhgu.exe /d"C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2768
        • 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:2404

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\bnzebhgu.exe
        Filesize

        14.8MB

        MD5

        0b911580e9c33459b73c63467597dbd5

        SHA1

        d0632356f0e7c7d34e1ffcba3fbce846d8098f98

        SHA256

        2bce14df7ce69e7ddfcddc90df0c04fd97755d5058b9ca456fee25412de97e10

        SHA512

        d8090beb16233e4427dbadc2bfe807c0e7d44e5963f619787e06084ab66541df923ec80d71844783c6a20ae68d4935825d0e4cc9a03f6df3a7f125db7e55a14d

      • memory/1316-2-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB

      • memory/1316-3-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB

      • memory/1316-7-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB

      • memory/2404-42-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-41-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-16-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2404-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2404-18-0x0000000001900000-0x0000000001B0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2404-9-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2404-25-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-28-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-53-0x0000000000290000-0x0000000000297000-memory.dmp
        Filesize

        28KB

      • memory/2404-50-0x0000000005490000-0x000000000589B000-memory.dmp
        Filesize

        4.0MB

      • memory/2404-48-0x0000000000270000-0x0000000000275000-memory.dmp
        Filesize

        20KB

      • memory/2404-45-0x0000000000270000-0x0000000000275000-memory.dmp
        Filesize

        20KB

      • memory/2404-44-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-43-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-15-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2404-12-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2404-40-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-39-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-38-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-37-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-36-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-35-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-34-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-33-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-32-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-31-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-30-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-29-0x00000000001E0000-0x00000000001F0000-memory.dmp
        Filesize

        64KB

      • memory/2404-52-0x0000000005490000-0x000000000589B000-memory.dmp
        Filesize

        4.0MB

      • memory/2404-22-0x00000000000E0000-0x00000000000E6000-memory.dmp
        Filesize

        24KB

      • memory/2404-21-0x0000000001900000-0x0000000001B0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2768-14-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB