Analysis

  • max time kernel
    145s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240704-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-07-2024 03:47

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.

  • 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.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe
    "C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2696
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ygflykil\
      2⤵
        PID:2304
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hfucvlgc.exe" C:\Windows\SysWOW64\ygflykil\
        2⤵
          PID:1800
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ygflykil binPath= "C:\Windows\SysWOW64\ygflykil\hfucvlgc.exe /d\"C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3908
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ygflykil "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1724
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ygflykil
          2⤵
          • Launches sc.exe
          PID:3520
        • 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:2964
      • C:\Windows\SysWOW64\ygflykil\hfucvlgc.exe
        C:\Windows\SysWOW64\ygflykil\hfucvlgc.exe /d"C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:540
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:1084

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        14.7MB

        MD5

        c256b5dce6da55054ce361f1afccbae9

        SHA1

        8577b5f063a24eda69aee7b1fc041a3d2c4612a9

        SHA256

        0f796788c57ed1c913f2a044c5cd67cee4fd6ad20ebedc14e804db8e90a4f8e4

        SHA512

        06deb20a19664ada5322801c6bee949b3b71d2d470043cf38b39054d0c5757833de6690d5cbd1fd1130cb7ada074814fab684927822317f107315dead0ac6dc1

      • memory/540-11-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB

      • memory/1084-41-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-34-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-18-0x0000000002800000-0x0000000002A0F000-memory.dmp
        Filesize

        2.1MB

      • memory/1084-39-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-28-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-12-0x00000000009E0000-0x00000000009F5000-memory.dmp
        Filesize

        84KB

      • memory/1084-13-0x00000000009E0000-0x00000000009F5000-memory.dmp
        Filesize

        84KB

      • memory/1084-52-0x0000000007800000-0x0000000007C0B000-memory.dmp
        Filesize

        4.0MB

      • memory/1084-53-0x0000000002DD0000-0x0000000002DD7000-memory.dmp
        Filesize

        28KB

      • memory/1084-49-0x0000000007800000-0x0000000007C0B000-memory.dmp
        Filesize

        4.0MB

      • memory/1084-48-0x0000000001FF0000-0x0000000001FF5000-memory.dmp
        Filesize

        20KB

      • memory/1084-43-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-45-0x0000000001FF0000-0x0000000001FF5000-memory.dmp
        Filesize

        20KB

      • memory/1084-44-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-40-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-42-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-8-0x00000000009E0000-0x00000000009F5000-memory.dmp
        Filesize

        84KB

      • memory/1084-29-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-30-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-37-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-35-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-25-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-22-0x0000000000DF0000-0x0000000000DF6000-memory.dmp
        Filesize

        24KB

      • memory/1084-21-0x0000000002800000-0x0000000002A0F000-memory.dmp
        Filesize

        2.1MB

      • memory/1084-36-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-38-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-33-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-32-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/1084-31-0x0000000001FA0000-0x0000000001FB0000-memory.dmp
        Filesize

        64KB

      • memory/2696-4-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2696-10-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB

      • memory/2696-2-0x0000000002970000-0x0000000002983000-memory.dmp
        Filesize

        76KB

      • memory/2696-1-0x0000000002AF0000-0x0000000002BF0000-memory.dmp
        Filesize

        1024KB

      • memory/2696-61-0x0000000002970000-0x0000000002983000-memory.dmp
        Filesize

        76KB

      • memory/2696-60-0x0000000002AF0000-0x0000000002BF0000-memory.dmp
        Filesize

        1024KB

      • memory/2696-63-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB