Analysis

  • max time kernel
    145s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-08-2024 01:51

General

  • Target

    00a7fe01857f4c5a118c936b5573b4c2755c8369534870394c3d61a5af058bcc.exe

  • Size

    11.2MB

  • MD5

    6673656f0eea34edbe311046d2525113

  • SHA1

    d94411ba9cec4a38a2f2ddf11df6f2e27eb5cbfd

  • SHA256

    00a7fe01857f4c5a118c936b5573b4c2755c8369534870394c3d61a5af058bcc

  • SHA512

    f321489b42db6d062837414749adaefffeb87703f937b8ebb1e27a670cae75128af278222284b8bd72d26828535b1683d821e97b721d110b971d183312f37a01

  • SSDEEP

    12288:ozZd0++++++++++++++++++++++++++++++++++++++++++++++++++++++++++/:ozZ

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of SetThreadContext 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\00a7fe01857f4c5a118c936b5573b4c2755c8369534870394c3d61a5af058bcc.exe
    "C:\Users\Admin\AppData\Local\Temp\00a7fe01857f4c5a118c936b5573b4c2755c8369534870394c3d61a5af058bcc.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4456
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hnsvqhxw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2740
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\luotlkfb.exe" C:\Windows\SysWOW64\hnsvqhxw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1168
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create hnsvqhxw binPath= "C:\Windows\SysWOW64\hnsvqhxw\luotlkfb.exe /d\"C:\Users\Admin\AppData\Local\Temp\00a7fe01857f4c5a118c936b5573b4c2755c8369534870394c3d61a5af058bcc.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3996
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description hnsvqhxw "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1172
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start hnsvqhxw
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2480
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:4116
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4456 -s 1220
      2⤵
      • Program crash
      PID:1920
  • C:\Windows\SysWOW64\hnsvqhxw\luotlkfb.exe
    C:\Windows\SysWOW64\hnsvqhxw\luotlkfb.exe /d"C:\Users\Admin\AppData\Local\Temp\00a7fe01857f4c5a118c936b5573b4c2755c8369534870394c3d61a5af058bcc.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3868
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2524
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3868 -s 512
      2⤵
      • Program crash
      PID:3524
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4456 -ip 4456
    1⤵
      PID:3340
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3868 -ip 3868
      1⤵
        PID:3904

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.9MB

        MD5

        8ebf216cb61b02e10ddf44835296e358

        SHA1

        9f15cc003195024d9450b48bef4691bb2d1d7327

        SHA256

        ef80641332f4c70d90894ec6f7c410b9b52ee6b5dffef96c3a4d65967aa7d067

        SHA512

        82984fcc8b1d6a07023561562b900997587adaba61353404709aa928b893fee33bd66003a9fc99284fad9de8962f1c730cf29437ecd1980dcbcbfdc022fc000d

      • memory/2524-8-0x0000000000120000-0x0000000000135000-memory.dmp

        Filesize

        84KB

      • memory/2524-14-0x0000000000120000-0x0000000000135000-memory.dmp

        Filesize

        84KB

      • memory/2524-15-0x0000000000120000-0x0000000000135000-memory.dmp

        Filesize

        84KB

      • memory/3868-10-0x0000000000400000-0x0000000002DAC000-memory.dmp

        Filesize

        41.7MB

      • memory/4456-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/4456-1-0x0000000002F30000-0x0000000003030000-memory.dmp

        Filesize

        1024KB

      • memory/4456-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4456-13-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4456-12-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/4456-11-0x0000000000400000-0x0000000002DAC000-memory.dmp

        Filesize

        41.7MB