Analysis

  • max time kernel
    142s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    14/11/2022, 06:52

General

  • Target
    file.exe
  • Size 316KB
  • Sample221114-hm3flafd59
  • SHA256 0e958f6b88c101538f229c36ca543d2df57f695ec1401fc28fc0e16a5ffdaed0
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • tofsee

C2
  • svartalfheim.top

  • 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 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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). Likely ransomware behaviour.

  • 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nizeqvmh\
      2⤵
        PID:1640
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wmobskv.exe" C:\Windows\SysWOW64\nizeqvmh\
        2⤵
          PID:1840
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nizeqvmh binPath= "C:\Windows\SysWOW64\nizeqvmh\wmobskv.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1820
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description nizeqvmh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:288
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start nizeqvmh
          2⤵
          • Launches sc.exe
          PID:1756
        • 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:1160
      • C:\Windows\SysWOW64\nizeqvmh\wmobskv.exe
        C:\Windows\SysWOW64\nizeqvmh\wmobskv.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1164
        • 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:1256
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2028

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            wmobskv.exe

            • Path C:\Users\Admin\AppData\Local\Temp\wmobskv.exe
            • Size 14.1MB
            • SHA256 21e3ef7ed6949b95dbc776b11a5bd21951b148b713cebd3184cd3e7770bf0476
            • MD5 SHA1 SHA512 SSDEEP

            wmobskv.exe

            • Path C:\Windows\SysWOW64\nizeqvmh\wmobskv.exe
            • Size 14.1MB
            • SHA256 21e3ef7ed6949b95dbc776b11a5bd21951b148b713cebd3184cd3e7770bf0476
            • MD5 SHA1 SHA512 SSDEEP

            memory/1164-79-0x0000000000400000-0x0000000000852000-memory.dmp

            memory/1164-77-0x0000000000978000-0x000000000098E000-memory.dmp

            memory/1164-69-0x0000000000978000-0x000000000098E000-memory.dmp

            memory/1256-88-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/1256-100-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/1256-97-0x0000000000430000-0x0000000000437000-memory.dmp

            memory/1256-94-0x0000000005410000-0x000000000581B000-memory.dmp

            memory/1256-91-0x0000000000230000-0x0000000000235000-memory.dmp

            memory/1256-85-0x0000000000210000-0x0000000000216000-memory.dmp

            memory/1256-82-0x0000000001910000-0x0000000001B1F000-memory.dmp

            memory/1256-81-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/1256-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/1256-74-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/1668-68-0x0000000000400000-0x0000000000852000-memory.dmp

            memory/1668-55-0x0000000075071000-0x0000000075073000-memory.dmp

            memory/1668-57-0x0000000000A18000-0x0000000000A2E000-memory.dmp

            memory/1668-67-0x0000000000A18000-0x0000000000A2E000-memory.dmp

            memory/1668-54-0x0000000000A18000-0x0000000000A2E000-memory.dmp

            memory/1668-58-0x0000000000220000-0x0000000000233000-memory.dmp

            memory/1668-59-0x0000000000400000-0x0000000000852000-memory.dmp

            memory/2028-101-0x0000000000270000-0x0000000000361000-memory.dmp

            memory/2028-103-0x0000000000270000-0x0000000000361000-memory.dmp