Analysis

  • max time kernel
    143s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    30/09/2023, 13:14

General

  • Target

    aaedae1fa452a304d3065e2ea1bd6d2095de07a22b18a06205bda38427646659_JC.exe

  • Size

    296KB

  • MD5

    2bdaf5247ae0a9c549d5b028d3bba314

  • SHA1

    59377777f6c956c422dbdb222730381aadacf475

  • SHA256

    aaedae1fa452a304d3065e2ea1bd6d2095de07a22b18a06205bda38427646659

  • SHA512

    b0852e10b692637ea206db3b4833f644bdb53528a95a318ea55de6095b6195470444f6fc1122d2285c6ad40dc888b49ef3c73722c7b4e0caa7fef03a3a9033cf

  • SSDEEP

    3072:gF/1kYoF9O/aT6c7s0gXdqR10zRylbcbVvWs2h1DsAw:W/1gFE/aT57GxylYNcu

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\aaedae1fa452a304d3065e2ea1bd6d2095de07a22b18a06205bda38427646659_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\aaedae1fa452a304d3065e2ea1bd6d2095de07a22b18a06205bda38427646659_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1448
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wnkdppxp\
      2⤵
        PID:1668
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rgyfkinf.exe" C:\Windows\SysWOW64\wnkdppxp\
        2⤵
          PID:2584
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wnkdppxp binPath= "C:\Windows\SysWOW64\wnkdppxp\rgyfkinf.exe /d\"C:\Users\Admin\AppData\Local\Temp\aaedae1fa452a304d3065e2ea1bd6d2095de07a22b18a06205bda38427646659_JC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2708
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wnkdppxp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2772
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wnkdppxp
          2⤵
          • Launches sc.exe
          PID:2500
        • 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:2268
      • C:\Windows\SysWOW64\wnkdppxp\rgyfkinf.exe
        C:\Windows\SysWOW64\wnkdppxp\rgyfkinf.exe /d"C:\Users\Admin\AppData\Local\Temp\aaedae1fa452a304d3065e2ea1bd6d2095de07a22b18a06205bda38427646659_JC.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2516
        • 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:2660
          • 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:932

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        11.0MB

        MD5

        25c9251a0f1e14b228f55d44a04ae0d9

        SHA1

        58510dc8b64586b82285719cf209fbfc138cfded

        SHA256

        301d3d329b48d915d73333ae7bb5a1df142d9a7867156a5ead14aaf63a70bbdb

        SHA512

        918c83b02380e98efe6cf26bd83f3d9506eba2aba06a7fdb3c798cb4aab56371a6b240362724ff6416367a204b6edf7c94fdb13bcd803e9eb1038c80484ffdd6

      • C:\Windows\SysWOW64\wnkdppxp\rgyfkinf.exe

        Filesize

        11.0MB

        MD5

        25c9251a0f1e14b228f55d44a04ae0d9

        SHA1

        58510dc8b64586b82285719cf209fbfc138cfded

        SHA256

        301d3d329b48d915d73333ae7bb5a1df142d9a7867156a5ead14aaf63a70bbdb

        SHA512

        918c83b02380e98efe6cf26bd83f3d9506eba2aba06a7fdb3c798cb4aab56371a6b240362724ff6416367a204b6edf7c94fdb13bcd803e9eb1038c80484ffdd6

      • memory/932-73-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-74-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-63-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-64-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/932-72-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-78-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-77-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-76-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/932-75-0x0000000000170000-0x0000000000261000-memory.dmp

        Filesize

        964KB

      • memory/1448-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

        Filesize

        1024KB

      • memory/1448-4-0x0000000000400000-0x000000000259C000-memory.dmp

        Filesize

        33.6MB

      • memory/1448-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/1448-7-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/1448-6-0x0000000000400000-0x000000000259C000-memory.dmp

        Filesize

        33.6MB

      • memory/2516-19-0x0000000000400000-0x000000000259C000-memory.dmp

        Filesize

        33.6MB

      • memory/2516-17-0x0000000000400000-0x000000000259C000-memory.dmp

        Filesize

        33.6MB

      • memory/2516-10-0x00000000002D0000-0x00000000003D0000-memory.dmp

        Filesize

        1024KB

      • memory/2660-39-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-50-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-34-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-36-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-37-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-38-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-31-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-40-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-41-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-42-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-43-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-44-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-45-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-46-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-47-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-48-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-49-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-35-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2660-51-0x0000000000240000-0x0000000000245000-memory.dmp

        Filesize

        20KB

      • memory/2660-54-0x0000000000240000-0x0000000000245000-memory.dmp

        Filesize

        20KB

      • memory/2660-55-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2660-58-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2660-59-0x00000000002F0000-0x00000000002F7000-memory.dmp

        Filesize

        28KB

      • memory/2660-28-0x0000000000150000-0x0000000000156000-memory.dmp

        Filesize

        24KB

      • memory/2660-27-0x00000000018A0000-0x0000000001AAF000-memory.dmp

        Filesize

        2.1MB

      • memory/2660-24-0x00000000018A0000-0x0000000001AAF000-memory.dmp

        Filesize

        2.1MB

      • memory/2660-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2660-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2660-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2660-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2660-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2660-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2660-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB