Analysis

  • max time kernel
    196s
  • max time network
    236s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/11/2023, 22:26

General

  • Target

    35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe

  • Size

    274KB

  • MD5

    59e1227450eb946f0eb83fad2f72b1f5

  • SHA1

    b78400bfe2fb0dbe892b1dff5220a7de2c43dfc6

  • SHA256

    35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652

  • SHA512

    19fd57f8a026cd2cc64f4d8ac99538b9d90f9a33a3d70c2061131ea5094a53fa0c4bf23a6adaf51d06bdd799236860311cb4f67e7503ac43259461aedfeda1c2

  • SSDEEP

    3072:QlnO9lcF4LS5ZUsBHS9R071uEcR647ovb3Trh6e:UnXKL+By9R0ooMMrT

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.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe
    "C:\Users\Admin\AppData\Local\Temp\35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2716
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qeekntje\
      2⤵
        PID:644
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qxehwkdn.exe" C:\Windows\SysWOW64\qeekntje\
        2⤵
          PID:4348
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qeekntje binPath= "C:\Windows\SysWOW64\qeekntje\qxehwkdn.exe /d\"C:\Users\Admin\AppData\Local\Temp\35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3248
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qeekntje "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1988
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qeekntje
          2⤵
          • Launches sc.exe
          PID:3204
        • 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:1808

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.1MB

              MD5

              7522d32cab25dcc311ffc31580b54870

              SHA1

              bd048093ee7dbbf82cb51ca15ec18a1264939552

              SHA256

              42d7b72954d782eaf3fc93a68cc9591ce7c029992bc3de5b9b4234290c498427

              SHA512

              304c2554a02c55db24a24a8f26cb6afbc67a9ee5938c5f22d50eb2b736b5b67ae13a2847e8e9a06507e991e5ee94f47c905ade43189f584b1a5af538d26d3fee

            • memory/2716-1-0x0000000000560000-0x0000000000660000-memory.dmp

              Filesize

              1024KB

            • memory/2716-2-0x0000000002110000-0x0000000002123000-memory.dmp

              Filesize

              76KB

            • memory/2716-3-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB

            • memory/2716-5-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB

            • memory/2716-6-0x0000000000560000-0x0000000000660000-memory.dmp

              Filesize

              1024KB

            • memory/2716-8-0x0000000002110000-0x0000000002123000-memory.dmp

              Filesize

              76KB

            • memory/2716-16-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB