Analysis

  • max time kernel
    141s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 12:58

General

  • Target

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe

  • Size

    170KB

  • MD5

    f5fd4237e550503a8eab51ae35f147b6

  • SHA1

    869d44d58fb734b3692500dae1f42f0d6e3b3434

  • SHA256

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd

  • SHA512

    32327ca44e09d46ba8e656124f7480979b3eeb3769a94259d536a5223b2c532bd21654d8b4551d26265903f5c2be87a8da73d4571eee6fd9bfc887ea9e88350f

  • SSDEEP

    1536:Js5KSNeteSXSI4nZ7OyP8p7+C1xIhQ6M3dfUMJn325pDedDT50ZXXKVXRKX:e5ScSHCO1p7hiO4AI1edHK56lR

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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe
    "C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fzzemlaw\
      2⤵
        PID:2504
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xgmxvkc.exe" C:\Windows\SysWOW64\fzzemlaw\
        2⤵
          PID:2000
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fzzemlaw binPath= "C:\Windows\SysWOW64\fzzemlaw\xgmxvkc.exe /d\"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2612
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fzzemlaw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fzzemlaw
          2⤵
          • Launches sc.exe
          PID:2620
        • 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:2576
      • C:\Windows\SysWOW64\fzzemlaw\xgmxvkc.exe
        C:\Windows\SysWOW64\fzzemlaw\xgmxvkc.exe /d"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2996
        • 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:3000

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.1MB

        MD5

        4b86ce785b362ea0205dc2e10a29e11f

        SHA1

        adf80a5875120b9336ab0895f6ccc7d6ad572991

        SHA256

        3c2ae8cb3d3d3c90d7e3960a1c880e40d3b13878471b1e01e0c6e8416c0f5e72

        SHA512

        fe274dd8969f5e918b14c447d56950f0878d34db3e97df15ff6a13677335e0db575f1e49bcb5aac731e25df420a4ec104b486201300b25a234eff8b7fa3a362a

      • memory/2192-4-0x0000000000400000-0x0000000000474000-memory.dmp

        Filesize

        464KB

      • memory/2192-1-0x00000000008C0000-0x00000000009C0000-memory.dmp

        Filesize

        1024KB

      • memory/2192-7-0x0000000000400000-0x0000000000474000-memory.dmp

        Filesize

        464KB

      • memory/2192-3-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2996-15-0x0000000000400000-0x0000000000474000-memory.dmp

        Filesize

        464KB

      • memory/2996-10-0x0000000000520000-0x0000000000620000-memory.dmp

        Filesize

        1024KB

      • memory/2996-12-0x0000000000400000-0x0000000000474000-memory.dmp

        Filesize

        464KB

      • memory/3000-33-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-41-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-9-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3000-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3000-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3000-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3000-22-0x00000000019C0000-0x0000000001BCF000-memory.dmp

        Filesize

        2.1MB

      • memory/3000-25-0x00000000019C0000-0x0000000001BCF000-memory.dmp

        Filesize

        2.1MB

      • memory/3000-26-0x0000000000120000-0x0000000000126000-memory.dmp

        Filesize

        24KB

      • memory/3000-35-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-36-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-34-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/3000-32-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-44-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-43-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-42-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3000-45-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-48-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-47-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-46-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-49-0x0000000000360000-0x0000000000365000-memory.dmp

        Filesize

        20KB

      • memory/3000-40-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-39-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-38-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-37-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-29-0x0000000000310000-0x0000000000320000-memory.dmp

        Filesize

        64KB

      • memory/3000-52-0x0000000000360000-0x0000000000365000-memory.dmp

        Filesize

        20KB

      • memory/3000-53-0x00000000058F0000-0x0000000005CFB000-memory.dmp

        Filesize

        4.0MB

      • memory/3000-56-0x00000000058F0000-0x0000000005CFB000-memory.dmp

        Filesize

        4.0MB

      • memory/3000-57-0x0000000000370000-0x0000000000377000-memory.dmp

        Filesize

        28KB

      • memory/3000-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB