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Analysis

  • max time kernel
    149s
  • max time network
    141s
  • 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, 13:09

General

  • Target

    072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe

  • Size

    13.6MB

  • MD5

    b5b559ae20ec80c26ec50afd2d077f53

  • SHA1

    4553fc5937302711ee5e74a881c7fd4acd119e5b

  • SHA256

    072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd

  • SHA512

    dadb525483641f1574c5efcb48cc2c1333d34145b1b7e6386afa9f3e64db7ce45bbe4fc70f2656a997ec42e839bc73cb4c641bd97061e95d712c476f5573cdfd

  • SSDEEP

    196608:aI+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++2:a

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\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
    "C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2268
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ouwuvlbg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1728
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bqdzlkdp.exe" C:\Windows\SysWOW64\ouwuvlbg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1220
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ouwuvlbg binPath= "C:\Windows\SysWOW64\ouwuvlbg\bqdzlkdp.exe /d\"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1128
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ouwuvlbg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3212
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ouwuvlbg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1576
    • 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:3932
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 648
      2⤵
      • Program crash
      PID:1312
  • C:\Windows\SysWOW64\ouwuvlbg\bqdzlkdp.exe
    C:\Windows\SysWOW64\ouwuvlbg\bqdzlkdp.exe /d"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:612
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:3660
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 612 -s 508
      2⤵
      • Program crash
      PID:3676
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2268 -ip 2268
    1⤵
      PID:3576
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 612 -ip 612
      1⤵
        PID:1224

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.5MB

        MD5

        660e9f50291f6b791b6502dccc800e22

        SHA1

        69ab6b9626e3bbf495d1011a8bdbd9531b3b22fc

        SHA256

        5d565f9bd4fe9531b9a50a0ba456edd7ffc2ce4ec9514b17a5c2424cf99c818d

        SHA512

        4dc0af8afbf0366c7b7b9a5b132830ac7162d1c4fce1c7cf4a28284a06e4fce4e97f1bb4f84ea6bafea1b3e13cd84c7c6a1df1826293020e21e28c4bc47e849a

      • memory/612-16-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/612-8-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/612-10-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/2268-13-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/2268-1-0x0000000000A20000-0x0000000000B20000-memory.dmp

        Filesize

        1024KB

      • memory/2268-15-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2268-14-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/2268-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2268-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3660-17-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

        Filesize

        84KB

      • memory/3660-9-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

        Filesize

        84KB

      • memory/3660-19-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

        Filesize

        84KB

      • memory/3660-20-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

        Filesize

        84KB

      • memory/3660-21-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

        Filesize

        84KB