Analysis

  • max time kernel
    187s
  • max time network
    259s
  • platform
    windows10-1703_x64
  • resource
    win10-20231020-en
  • resource tags

    arch:x64arch:x86image:win10-20231020-enlocale:en-usos:windows10-1703-x64system
  • submitted
    19/11/2023, 22:17

General

  • Target

    3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe

  • Size

    257KB

  • MD5

    815a6bc73b581777945c004fbb0df6a8

  • SHA1

    281cd70aaa223b57e91d652e03eeeeb1682e5312

  • SHA256

    3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6

  • SHA512

    f28e1db3a2eda5b77e531ddbe6c8c15a8c93b6546eddc5206bca7183bbfa3cf4bf0458dfbc6d4af18d8bc7ad2e4093d3360cc071abbb7653c8b55e885dbebefd

  • SSDEEP

    3072:zPLwx2C81Tcw2igVdotgCle3Q8dtUqo73NIktGyqPYRB2P7ovb9P4:rU8dX2igqhp8bE73nIfk2jM

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
  • Executes dropped EXE 1 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).

  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe
    "C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1880
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rlqbakkh\
      2⤵
        PID:5068
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cwworbfr.exe" C:\Windows\SysWOW64\rlqbakkh\
        2⤵
          PID:4880
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rlqbakkh binPath= "C:\Windows\SysWOW64\rlqbakkh\cwworbfr.exe /d\"C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:224
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rlqbakkh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4368
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rlqbakkh
          2⤵
          • Launches sc.exe
          PID:4020
        • 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:3204
      • C:\Windows\SysWOW64\rlqbakkh\cwworbfr.exe
        C:\Windows\SysWOW64\rlqbakkh\cwworbfr.exe /d"C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe"
        1⤵
        • Executes dropped EXE
        PID:4740

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              14.7MB

              MD5

              7c6d613620487d967540eff4393c9252

              SHA1

              a701bac23e1efdf643fb72f41064ee9042bf06d8

              SHA256

              a43ceb4d08c0cddaecb66f4ac6479b728f935c2ea1516c5debae8a7e8686cfd7

              SHA512

              c7d9610c8f83f5705eb2fe60836c139dd498edb367acca357d4722fc69e0e01b78ffcd334646c3cdce2f012da14dad8dd2fb58168049e89708575ce59b5a7ee8

            • C:\Windows\SysWOW64\rlqbakkh\cwworbfr.exe

              Filesize

              14.7MB

              MD5

              7c6d613620487d967540eff4393c9252

              SHA1

              a701bac23e1efdf643fb72f41064ee9042bf06d8

              SHA256

              a43ceb4d08c0cddaecb66f4ac6479b728f935c2ea1516c5debae8a7e8686cfd7

              SHA512

              c7d9610c8f83f5705eb2fe60836c139dd498edb367acca357d4722fc69e0e01b78ffcd334646c3cdce2f012da14dad8dd2fb58168049e89708575ce59b5a7ee8

            • memory/1880-1-0x0000000000790000-0x0000000000890000-memory.dmp

              Filesize

              1024KB

            • memory/1880-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

              Filesize

              76KB

            • memory/1880-3-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/1880-6-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/1880-7-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/1880-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

              Filesize

              76KB