Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-09-2024 07:25

General

  • Target

    93c57d1b6044486f8962a08e6ce7c774d54c0dc8fad2da404eb99e451b75b2e9.exe

  • Size

    14.7MB

  • MD5

    85fc255b144ad1bae941cb10f76c562d

  • SHA1

    6961b75a7e5e1720c6fd01b4979c77f3269e7aec

  • SHA256

    93c57d1b6044486f8962a08e6ce7c774d54c0dc8fad2da404eb99e451b75b2e9

  • SHA512

    e7e6ce112594f2d6a597ecd063e2797f1695be72dbd59316410d186be6e8876116662aa95d9ad25107a079b04eaffa7a7c039a99f2ef2fa15ae4681bace3f819

  • SSDEEP

    98304:/UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUc:

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\93c57d1b6044486f8962a08e6ce7c774d54c0dc8fad2da404eb99e451b75b2e9.exe
    "C:\Users\Admin\AppData\Local\Temp\93c57d1b6044486f8962a08e6ce7c774d54c0dc8fad2da404eb99e451b75b2e9.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4088
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oxpwwhwh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3196
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ynawiham.exe" C:\Windows\SysWOW64\oxpwwhwh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5024
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create oxpwwhwh binPath= "C:\Windows\SysWOW64\oxpwwhwh\ynawiham.exe /d\"C:\Users\Admin\AppData\Local\Temp\93c57d1b6044486f8962a08e6ce7c774d54c0dc8fad2da404eb99e451b75b2e9.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4576
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description oxpwwhwh "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1472
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start oxpwwhwh
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4116
    • 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:3240
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 780
      2⤵
      • Program crash
      PID:3676
  • C:\Windows\SysWOW64\oxpwwhwh\ynawiham.exe
    C:\Windows\SysWOW64\oxpwwhwh\ynawiham.exe /d"C:\Users\Admin\AppData\Local\Temp\93c57d1b6044486f8962a08e6ce7c774d54c0dc8fad2da404eb99e451b75b2e9.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2588
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:3136
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2588 -s 508
      2⤵
      • Program crash
      PID:1080
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4088 -ip 4088
    1⤵
      PID:2388
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2588 -ip 2588
      1⤵
        PID:4920

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.4MB

        MD5

        0fff4ec84b697110c53c48cb51be9ffd

        SHA1

        44e40452ed5da50788a6b91b9de897ab471b370c

        SHA256

        3365e0b6c3371e0d39fc19fc3d34ce3913e8edc5efcc57c6286084b3998f783e

        SHA512

        a4a76bf439abb4a1408e62df04ff69962b1f7a55ec7bc6f335f5b172421e38a7fa2255fb993614350b678824c9626c6e096db580b8efb46dc373aa4430498933

      • memory/2588-13-0x0000000000400000-0x0000000000448000-memory.dmp

        Filesize

        288KB

      • memory/2588-11-0x0000000000400000-0x0000000000448000-memory.dmp

        Filesize

        288KB

      • memory/2588-12-0x0000000000400000-0x0000000000448000-memory.dmp

        Filesize

        288KB

      • memory/2588-18-0x0000000000400000-0x0000000000448000-memory.dmp

        Filesize

        288KB

      • memory/3136-14-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB

      • memory/3136-16-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB

      • memory/3136-17-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB

      • memory/4088-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4088-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/4088-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/4088-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4088-8-0x0000000000400000-0x0000000000448000-memory.dmp

        Filesize

        288KB

      • memory/4088-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

        Filesize

        1024KB