Analysis

  • max time kernel
    166s
  • max time network
    180s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/12/2023, 02:01

General

  • Target

    0afa588af16c7068fbae1ae4e46900a2.exe

  • Size

    14.2MB

  • MD5

    0afa588af16c7068fbae1ae4e46900a2

  • SHA1

    07ae83b98f7bce0dbccd8c28db4accc2de760337

  • SHA256

    e43c1d14f40e2d57fb222fc937a8c007c89ccdae9d1fd6b20cbc02c987c9c442

  • SHA512

    f3341ca41c682718b47fcc89215d0accfd412ad3a4e7c83d0465c5b8a6e2d5bc41ec797b2dc0010a66296852cdb067f3ab9db7c08ea2f0d4e46ded63bfc62ebf

  • SSDEEP

    49152:zlGypVbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbn:zlGyp

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) 1 TTPs
  • Modifies Windows Firewall 1 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.

  • 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).

  • Program crash 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0afa588af16c7068fbae1ae4e46900a2.exe
    "C:\Users\Admin\AppData\Local\Temp\0afa588af16c7068fbae1ae4e46900a2.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3888
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dzfwihuc\
      2⤵
        PID:212
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qhdkbaei.exe" C:\Windows\SysWOW64\dzfwihuc\
        2⤵
          PID:3512
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dzfwihuc binPath= "C:\Windows\SysWOW64\dzfwihuc\qhdkbaei.exe /d\"C:\Users\Admin\AppData\Local\Temp\0afa588af16c7068fbae1ae4e46900a2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5044
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dzfwihuc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1576
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dzfwihuc
          2⤵
          • Launches sc.exe
          PID:4940
        • 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:3716
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3888 -s 1264
          2⤵
          • Program crash
          PID:876
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3888 -ip 3888
        1⤵
          PID:3140
        • C:\Windows\SysWOW64\dzfwihuc\qhdkbaei.exe
          C:\Windows\SysWOW64\dzfwihuc\qhdkbaei.exe /d"C:\Users\Admin\AppData\Local\Temp\0afa588af16c7068fbae1ae4e46900a2.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1884
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            2⤵
            • Sets service image path in registry
            PID:1624
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1884 -s 524
            2⤵
            • Program crash
            PID:1720
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1884 -ip 1884
          1⤵
            PID:4636

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

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

                  Filesize

                  13.3MB

                  MD5

                  de419e8e87c23a31864ec7c8dd28a0ba

                  SHA1

                  38a280b87e43a09abe70528995d8d5e6d4088036

                  SHA256

                  b4ead4d0187af71a356e05a4989d5522b7f84a3c5791f47b9f5f88ae4a2734a7

                  SHA512

                  6633d7938499d49921378fcbe099b2273cb0e385687d7572708fdffef2d0328fc3476aa0be509302359cefb9b34bfd610d1b44c40fc3042b31c45c5a2257e1f5

                • memory/1624-28-0x0000000000600000-0x0000000000615000-memory.dmp

                  Filesize

                  84KB

                • memory/1624-27-0x0000000000600000-0x0000000000615000-memory.dmp

                  Filesize

                  84KB

                • memory/1624-25-0x0000000000600000-0x0000000000615000-memory.dmp

                  Filesize

                  84KB

                • memory/1624-21-0x0000000000600000-0x0000000000615000-memory.dmp

                  Filesize

                  84KB

                • memory/1624-18-0x0000000000600000-0x0000000000615000-memory.dmp

                  Filesize

                  84KB

                • memory/1884-16-0x0000000000800000-0x0000000000900000-memory.dmp

                  Filesize

                  1024KB

                • memory/1884-23-0x0000000000400000-0x00000000004B3000-memory.dmp

                  Filesize

                  716KB

                • memory/1884-17-0x0000000000400000-0x00000000004B3000-memory.dmp

                  Filesize

                  716KB

                • memory/3888-6-0x0000000000400000-0x00000000004B3000-memory.dmp

                  Filesize

                  716KB

                • memory/3888-13-0x0000000000400000-0x00000000004B3000-memory.dmp

                  Filesize

                  716KB

                • memory/3888-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

                  Filesize

                  76KB

                • memory/3888-7-0x0000000000770000-0x0000000000870000-memory.dmp

                  Filesize

                  1024KB

                • memory/3888-1-0x0000000000770000-0x0000000000870000-memory.dmp

                  Filesize

                  1024KB

                • memory/3888-4-0x0000000000400000-0x00000000004B3000-memory.dmp

                  Filesize

                  716KB

                • memory/3888-3-0x0000000000400000-0x00000000004B3000-memory.dmp

                  Filesize

                  716KB

                • memory/3888-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

                  Filesize

                  76KB