Analysis

  • max time kernel
    149s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240704-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-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.

  • 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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 6 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:1792
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vcigibss\
      2⤵
        PID:2496
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bipshvoy.exe" C:\Windows\SysWOW64\vcigibss\
        2⤵
          PID:1672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vcigibss binPath= "C:\Windows\SysWOW64\vcigibss\bipshvoy.exe /d\"C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5000
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vcigibss "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4552
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vcigibss
          2⤵
          • Launches sc.exe
          PID:4388
        • 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:2808
      • C:\Windows\SysWOW64\vcigibss\bipshvoy.exe
        C:\Windows\SysWOW64\vcigibss\bipshvoy.exe /d"C:\Users\Admin\AppData\Local\Temp\f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:388
        • 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:3468

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        10.1MB

        MD5

        e9a48a6c75c9d4e964f5ae1eee7a7682

        SHA1

        0e39aef472f94e55d84778ed6d506f9b10df187d

        SHA256

        e8427b1225a16a95be6f4bf8aacd1e842b7360c9682d3dee49633ad8aa973416

        SHA512

        7c88c7e7ef1090e2d6f9dd549d558befa72de3c49d21479bb75504b92f2fd716234cb9fe300d7d72f9569d0956888e3cafa7002d7439ea740647096d41d493cf

      • memory/388-11-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB

      • memory/1792-3-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/1792-2-0x00000000029C0000-0x00000000029D3000-memory.dmp
        Filesize

        76KB

      • memory/1792-1-0x00000000029E0000-0x0000000002AE0000-memory.dmp
        Filesize

        1024KB

      • memory/1792-62-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/1792-10-0x0000000000400000-0x0000000002820000-memory.dmp
        Filesize

        36.1MB

      • memory/1792-60-0x00000000029E0000-0x0000000002AE0000-memory.dmp
        Filesize

        1024KB

      • memory/1792-61-0x00000000029C0000-0x00000000029D3000-memory.dmp
        Filesize

        76KB

      • memory/3468-41-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-34-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-53-0x00000000025F0000-0x00000000025F7000-memory.dmp
        Filesize

        28KB

      • memory/3468-49-0x0000000007E00000-0x000000000820B000-memory.dmp
        Filesize

        4.0MB

      • memory/3468-48-0x00000000025E0000-0x00000000025E5000-memory.dmp
        Filesize

        20KB

      • memory/3468-45-0x00000000025E0000-0x00000000025E5000-memory.dmp
        Filesize

        20KB

      • memory/3468-44-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-43-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-42-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-52-0x0000000007E00000-0x000000000820B000-memory.dmp
        Filesize

        4.0MB

      • memory/3468-40-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-39-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-37-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-35-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-36-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-38-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-21-0x0000000002E00000-0x000000000300F000-memory.dmp
        Filesize

        2.1MB

      • memory/3468-33-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-32-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-31-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-30-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-29-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-28-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-25-0x0000000002590000-0x00000000025A0000-memory.dmp
        Filesize

        64KB

      • memory/3468-22-0x0000000002580000-0x0000000002586000-memory.dmp
        Filesize

        24KB

      • memory/3468-18-0x0000000002E00000-0x000000000300F000-memory.dmp
        Filesize

        2.1MB

      • memory/3468-13-0x0000000000FD0000-0x0000000000FE5000-memory.dmp
        Filesize

        84KB

      • memory/3468-12-0x0000000000FD0000-0x0000000000FE5000-memory.dmp
        Filesize

        84KB

      • memory/3468-8-0x0000000000FD0000-0x0000000000FE5000-memory.dmp
        Filesize

        84KB