Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    19-07-2024 21:04

General

  • Target

    881e0d77937dfe04295b394212e9004db0bbad441ed40fab38a8a48216020bf7.exe

  • Size

    240KB

  • MD5

    4000d4183cb34633077012e5853c52e0

  • SHA1

    8a7816c227ebbd7ad29299f7b4caba89e32dc522

  • SHA256

    881e0d77937dfe04295b394212e9004db0bbad441ed40fab38a8a48216020bf7

  • SHA512

    375797bfca1bf017796f298943823a59160d9f932ffb6ef77e9b2da015bb7585c531964a829bcfc906a7f3ae6da1c64c6bc1dce92e99c925e5ff5dc8dd1628e4

  • SSDEEP

    3072:AdYyTQsx4c5U5Mzyy76jm5y2zvXpxgctPj1QfaYClo/cXqJBgNaCa:AdYcxDuCy8p5hpdKSUFcZ

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\881e0d77937dfe04295b394212e9004db0bbad441ed40fab38a8a48216020bf7.exe
    "C:\Users\Admin\AppData\Local\Temp\881e0d77937dfe04295b394212e9004db0bbad441ed40fab38a8a48216020bf7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2436
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bczqdyxy\
      2⤵
        PID:2600
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ubanvvdh.exe" C:\Windows\SysWOW64\bczqdyxy\
        2⤵
          PID:2376
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bczqdyxy binPath= "C:\Windows\SysWOW64\bczqdyxy\ubanvvdh.exe /d\"C:\Users\Admin\AppData\Local\Temp\881e0d77937dfe04295b394212e9004db0bbad441ed40fab38a8a48216020bf7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bczqdyxy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2192
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bczqdyxy
          2⤵
          • Launches sc.exe
          PID:2736
        • 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:2780
      • C:\Windows\SysWOW64\bczqdyxy\ubanvvdh.exe
        C:\Windows\SysWOW64\bczqdyxy\ubanvvdh.exe /d"C:\Users\Admin\AppData\Local\Temp\881e0d77937dfe04295b394212e9004db0bbad441ed40fab38a8a48216020bf7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2912
        • 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:2792

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        14.2MB

        MD5

        d51cbebf5b91ed7c384b2dd11e9e36c7

        SHA1

        fa33da2aea056e8485d41d9a7dd7c8fc74c62239

        SHA256

        9577b5088a720615a1a5229a2615a0cf806c2d0c9e42eb4fa814e767af828023

        SHA512

        633f3e35be0c180d1c33f67760a6754ad88f3c75f2d88e5adda3758a581e75869f9adedf652a56a565dd311998b2d80fbbcd4afdf5d19d0fa4e54265782f83af

      • memory/2436-2-0x0000000000400000-0x0000000002084000-memory.dmp
        Filesize

        28.5MB

      • memory/2436-3-0x0000000000400000-0x0000000002084000-memory.dmp
        Filesize

        28.5MB

      • memory/2436-7-0x0000000000400000-0x0000000002084000-memory.dmp
        Filesize

        28.5MB

      • memory/2792-35-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-43-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-9-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2792-15-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2792-16-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2792-52-0x0000000005430000-0x000000000583B000-memory.dmp
        Filesize

        4.0MB

      • memory/2792-18-0x00000000019A0000-0x0000000001BAF000-memory.dmp
        Filesize

        2.1MB

      • memory/2792-25-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-22-0x0000000000120000-0x0000000000126000-memory.dmp
        Filesize

        24KB

      • memory/2792-21-0x00000000019A0000-0x0000000001BAF000-memory.dmp
        Filesize

        2.1MB

      • memory/2792-44-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-49-0x0000000005430000-0x000000000583B000-memory.dmp
        Filesize

        4.0MB

      • memory/2792-53-0x0000000000160000-0x0000000000167000-memory.dmp
        Filesize

        28KB

      • memory/2792-48-0x0000000000150000-0x0000000000155000-memory.dmp
        Filesize

        20KB

      • memory/2792-45-0x0000000000150000-0x0000000000155000-memory.dmp
        Filesize

        20KB

      • memory/2792-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2792-42-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-41-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-40-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-39-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-38-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-37-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-36-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-12-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2792-34-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-33-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-32-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-31-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-30-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-29-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2792-28-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/2912-13-0x0000000000400000-0x0000000002084000-memory.dmp
        Filesize

        28.5MB