Analysis

  • max time kernel
    140s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 09:06

General

  • Target

    file.exe

  • Size

    272KB

  • MD5

    fee0ff5c08cfec7096612df413966b32

  • SHA1

    b50ea1884eb3192031eca229f3d3dc3334d82902

  • SHA256

    e9b08e0dd330ea6a2244220dc04f7dec992c83cba8ab1e60e165850d69f5e3e4

  • SHA512

    55ccede54df0f3e9c5f82b60b8a910e57737682b1413cfc842dc11c7054505dedaec478f082db35ab566d49a75ea13d787b53a2888f0332350207b1c661f8c0e

  • SSDEEP

    3072:2VX8hrkLdqiqKwK5u5gF8FHAbAM6A0gpVhP5VWZVnU+:+8xkLcPSu5C8JDM6AFP9WZ5

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:1944
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\johnbfug\
      2⤵
        PID:1456
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nwcnlas.exe" C:\Windows\SysWOW64\johnbfug\
        2⤵
          PID:2124
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create johnbfug binPath= "C:\Windows\SysWOW64\johnbfug\nwcnlas.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2292
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description johnbfug "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2736
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start johnbfug
          2⤵
          • Launches sc.exe
          PID:2812
        • 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:2696
      • C:\Windows\SysWOW64\johnbfug\nwcnlas.exe
        C:\Windows\SysWOW64\johnbfug\nwcnlas.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2824
        • 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:2748
          • 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:1020

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              14.8MB

              MD5

              6fad5bfa3919420026e160d5b3827ef6

              SHA1

              1631397a84a15b9a53d05a9101b0003aeca0a0e6

              SHA256

              b47f2ed8ef3ecd08a4106111f2b4ef70ceec3bfdd331f103350d239a27475c06

              SHA512

              a95eb02dc0a7d7f88039eb8eb508fbd304e22da240fff4ced114d8f2c0b2fe3192aba5bb8e761e120dc43349e9174e43bb2a49dc9955dae1af51aa1f641b0dff

            • C:\Windows\SysWOW64\johnbfug\nwcnlas.exe

              Filesize

              14.8MB

              MD5

              6fad5bfa3919420026e160d5b3827ef6

              SHA1

              1631397a84a15b9a53d05a9101b0003aeca0a0e6

              SHA256

              b47f2ed8ef3ecd08a4106111f2b4ef70ceec3bfdd331f103350d239a27475c06

              SHA512

              a95eb02dc0a7d7f88039eb8eb508fbd304e22da240fff4ced114d8f2c0b2fe3192aba5bb8e761e120dc43349e9174e43bb2a49dc9955dae1af51aa1f641b0dff

            • memory/1020-71-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-73-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-62-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-63-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-72-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-77-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-76-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-75-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1020-74-0x0000000000230000-0x0000000000321000-memory.dmp

              Filesize

              964KB

            • memory/1944-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1944-1-0x0000000000630000-0x0000000000730000-memory.dmp

              Filesize

              1024KB

            • memory/1944-3-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/1944-6-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/1944-7-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2748-37-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-46-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-26-0x0000000001990000-0x0000000001B9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2748-30-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-33-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-34-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-35-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-36-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-23-0x0000000001990000-0x0000000001B9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2748-38-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-39-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-40-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-41-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-42-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-43-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-44-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-45-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-27-0x00000000001E0000-0x00000000001E6000-memory.dmp

              Filesize

              24KB

            • memory/2748-47-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-48-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-49-0x00000000001F0000-0x0000000000200000-memory.dmp

              Filesize

              64KB

            • memory/2748-50-0x0000000000380000-0x0000000000385000-memory.dmp

              Filesize

              20KB

            • memory/2748-53-0x0000000000380000-0x0000000000385000-memory.dmp

              Filesize

              20KB

            • memory/2748-54-0x00000000054E0000-0x00000000058EB000-memory.dmp

              Filesize

              4.0MB

            • memory/2748-57-0x00000000054E0000-0x00000000058EB000-memory.dmp

              Filesize

              4.0MB

            • memory/2748-58-0x0000000000390000-0x0000000000397000-memory.dmp

              Filesize

              28KB

            • memory/2748-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2748-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2824-16-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2824-11-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2824-10-0x0000000000680000-0x0000000000780000-memory.dmp

              Filesize

              1024KB