Analysis

  • max time kernel
    149s
  • max time network
    151s
  • 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 15:23

General

  • Target

    f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe

  • Size

    14.1MB

  • MD5

    c60a9d97501c8fccb7ce37b52654839b

  • SHA1

    94fc047b6307fd89d39eaad454db89dc1d0809c4

  • SHA256

    f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02

  • SHA512

    5254c7f7f7164e27408bdaefe28b948a0b61e576161bd92d0aecefc7b327687e2f10c80ded601fbcfd0d799d887c4b3895e251d3db0a9ef50b3a58086a53ac45

  • SSDEEP

    12288:R0Xz1CuwA5Rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rpZ:R0X2

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe
    "C:\Users\Admin\AppData\Local\Temp\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3548
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\urdlswwp\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2836
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qvrjhkw.exe" C:\Windows\SysWOW64\urdlswwp\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3236
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create urdlswwp binPath= "C:\Windows\SysWOW64\urdlswwp\qvrjhkw.exe /d\"C:\Users\Admin\AppData\Local\Temp\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2744
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description urdlswwp "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1768
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start urdlswwp
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3552
    • 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:4772
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3548 -s 1176
      2⤵
      • Program crash
      PID:3116
  • C:\Windows\SysWOW64\urdlswwp\qvrjhkw.exe
    C:\Windows\SysWOW64\urdlswwp\qvrjhkw.exe /d"C:\Users\Admin\AppData\Local\Temp\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:404
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:732
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 512
      2⤵
      • Program crash
      PID:2588
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3548 -ip 3548
    1⤵
      PID:4640
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 404 -ip 404
      1⤵
        PID:4044

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.8MB

        MD5

        650b436122aa0dfaa27e48b6135a03d6

        SHA1

        5c5262d8b20c7830f49e35939b3db9c688bd881e

        SHA256

        8612e4ed35a9111fe6d78c065e80b637cbeee25d4b17a709687792b74fcf3f7a

        SHA512

        2419fa865c04bc0e9bce3b3f6cc79d03f085508602db5e56daadb9c7940c6650a94279c11acf3a375c41419a51bd60ce9b0e5c75f070b382675eac90e6927337

      • memory/404-13-0x0000000000400000-0x0000000000441000-memory.dmp

        Filesize

        260KB

      • memory/404-12-0x0000000000400000-0x0000000000441000-memory.dmp

        Filesize

        260KB

      • memory/404-11-0x0000000000400000-0x0000000000441000-memory.dmp

        Filesize

        260KB

      • memory/404-19-0x0000000000400000-0x0000000000441000-memory.dmp

        Filesize

        260KB

      • memory/732-14-0x0000000000410000-0x0000000000425000-memory.dmp

        Filesize

        84KB

      • memory/732-16-0x0000000000410000-0x0000000000425000-memory.dmp

        Filesize

        84KB

      • memory/732-17-0x0000000000410000-0x0000000000425000-memory.dmp

        Filesize

        84KB

      • memory/3548-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3548-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3548-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3548-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3548-8-0x0000000000400000-0x0000000000441000-memory.dmp

        Filesize

        260KB

      • memory/3548-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

        Filesize

        1024KB