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Analysis

  • max time kernel
    146s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/02/2024, 14:22

General

  • Target

    a2118c67534664afde234ba2dab7c02e.exe

  • Size

    10.2MB

  • MD5

    a2118c67534664afde234ba2dab7c02e

  • SHA1

    c398da3954e3d68ba1f05876d867ce57f9efbb34

  • SHA256

    79940b2f535b1111facb217b7f3ed439eb91003b345e0e6bc049af42fbbe9b13

  • SHA512

    cf20f6b7adfe95968ea411a4945f7460e72a234efb541cfd937105f7a8aa03f4ce93f5d09b341e37db65cb23e1f7304aacfe4f5d4ee72bdc5c0c04d2e4dbc79f

  • SSDEEP

    24576:UlxdvCcpOKCtBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBv:UlzOR

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) 1 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\a2118c67534664afde234ba2dab7c02e.exe
    "C:\Users\Admin\AppData\Local\Temp\a2118c67534664afde234ba2dab7c02e.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3972
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uwmcdpdo\
      2⤵
        PID:4372
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yqzherdx.exe" C:\Windows\SysWOW64\uwmcdpdo\
        2⤵
          PID:3300
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create uwmcdpdo binPath= "C:\Windows\SysWOW64\uwmcdpdo\yqzherdx.exe /d\"C:\Users\Admin\AppData\Local\Temp\a2118c67534664afde234ba2dab7c02e.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5032
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description uwmcdpdo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:720
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start uwmcdpdo
          2⤵
          • Launches sc.exe
          PID:4536
        • 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:4532
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 1032
          2⤵
          • Program crash
          PID:1696
      • C:\Windows\SysWOW64\uwmcdpdo\yqzherdx.exe
        C:\Windows\SysWOW64\uwmcdpdo\yqzherdx.exe /d"C:\Users\Admin\AppData\Local\Temp\a2118c67534664afde234ba2dab7c02e.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3648
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:680
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3648 -s 532
          2⤵
          • Program crash
          PID:916
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3972 -ip 3972
        1⤵
          PID:3804
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3648 -ip 3648
          1⤵
            PID:2464

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            10.1MB

            MD5

            a97009b0aaa919cf37c9d2565249f0f5

            SHA1

            e2169995542d3bf300b9be50f4cde800451fa01b

            SHA256

            72a22196f310a3744d04927e159483f39a8207ea991fbf3691f1d65fa16ee9b6

            SHA512

            a262971274c82ee1bebdac5b3c2fc56f7d5db2c2f97d2aeaeb4dc2502c22c83e0f8f6396f482eaacf92d0e2c4fe0ea445ce63bbd372c80e2c69633ee8fa23e37

          • C:\Windows\SysWOW64\uwmcdpdo\yqzherdx.exe

            Filesize

            9.1MB

            MD5

            2bb572540bce396e3fb3ededb000780d

            SHA1

            fabe406e422ce93d5607c9bf261f1bf906c902e6

            SHA256

            0ffdedf6f8b5bc4d806b5a7b0440a8dd498ce1ec27c95fd1b70b94df92ac3db8

            SHA512

            f44b302e91826f440864c75a60a240114f53483c736aa03efcde61dfd3e6eddff576a08757293d056434ca64e0abab5f026913573da6d9db619008f671c7b2bc

          • memory/680-12-0x0000000000D50000-0x0000000000D65000-memory.dmp

            Filesize

            84KB

          • memory/680-16-0x0000000000D50000-0x0000000000D65000-memory.dmp

            Filesize

            84KB

          • memory/680-18-0x0000000000D50000-0x0000000000D65000-memory.dmp

            Filesize

            84KB

          • memory/680-19-0x0000000000D50000-0x0000000000D65000-memory.dmp

            Filesize

            84KB

          • memory/3648-10-0x00000000005A0000-0x00000000006A0000-memory.dmp

            Filesize

            1024KB

          • memory/3648-11-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/3648-17-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/3972-3-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/3972-2-0x00000000021B0000-0x00000000021C3000-memory.dmp

            Filesize

            76KB

          • memory/3972-9-0x00000000021B0000-0x00000000021C3000-memory.dmp

            Filesize

            76KB

          • memory/3972-8-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/3972-1-0x00000000005E0000-0x00000000006E0000-memory.dmp

            Filesize

            1024KB