Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/03/2024, 15:41

General

  • Target

    de5c837465df687a5d4a83159dbd1b0a.exe

  • Size

    10.8MB

  • MD5

    de5c837465df687a5d4a83159dbd1b0a

  • SHA1

    8775b6ff434ba7e9480679c6ffe9af8997acb69b

  • SHA256

    4ddf6ff4aa156f8aca0d1925ff6ed53094f8d7d0a13db8da74340e8fa6ce9287

  • SHA512

    71b909c163be371d226b93800069dbdd13c6baba4e01501f4d946ae07f5e0ff2487c2e1093685b636fba2238d6124b5bbf9d66bc029f5e29f0dd61cb123d93f8

  • SSDEEP

    24576:0gdy5yNM4444444444444444444444444444444444444444444444444444444g:

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\de5c837465df687a5d4a83159dbd1b0a.exe
    "C:\Users\Admin\AppData\Local\Temp\de5c837465df687a5d4a83159dbd1b0a.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2700
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dwpcsqn\
      2⤵
        PID:1436
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cgjfraxt.exe" C:\Windows\SysWOW64\dwpcsqn\
        2⤵
          PID:392
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dwpcsqn binPath= "C:\Windows\SysWOW64\dwpcsqn\cgjfraxt.exe /d\"C:\Users\Admin\AppData\Local\Temp\de5c837465df687a5d4a83159dbd1b0a.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4260
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dwpcsqn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:788
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dwpcsqn
          2⤵
          • Launches sc.exe
          PID:3184
        • 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:1664
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2700 -s 1028
          2⤵
          • Program crash
          PID:920
      • C:\Windows\SysWOW64\dwpcsqn\cgjfraxt.exe
        C:\Windows\SysWOW64\dwpcsqn\cgjfraxt.exe /d"C:\Users\Admin\AppData\Local\Temp\de5c837465df687a5d4a83159dbd1b0a.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3288
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:2776
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3288 -s 528
          2⤵
          • Program crash
          PID:3880
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2700 -ip 2700
        1⤵
          PID:3044
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3288 -ip 3288
          1⤵
            PID:552

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            13.6MB

            MD5

            2ad02e1522f01c6991c706a72501d3fc

            SHA1

            a6dc6997050ff26f21a4e9ba3cdbd36f0213af1e

            SHA256

            45eaac1acb73a5008dc92979627882844734693ed5f8a2cd1301b121e4a0e429

            SHA512

            fe8d5274b14dc225be23e24897b8d849fed43a469e5dfd5f59eb3afff9165d46a7fce61bcb2da2c6c9273bda6e31fb4417ab65c5697dd347bfc08f1b90c82c63

          • memory/2700-1-0x0000000000510000-0x0000000000610000-memory.dmp

            Filesize

            1024KB

          • memory/2700-2-0x00000000021A0000-0x00000000021B3000-memory.dmp

            Filesize

            76KB

          • memory/2700-4-0x0000000000400000-0x0000000000456000-memory.dmp

            Filesize

            344KB

          • memory/2700-9-0x00000000021A0000-0x00000000021B3000-memory.dmp

            Filesize

            76KB

          • memory/2700-8-0x0000000000400000-0x0000000000456000-memory.dmp

            Filesize

            344KB

          • memory/2776-15-0x00000000003D0000-0x00000000003E5000-memory.dmp

            Filesize

            84KB

          • memory/2776-12-0x00000000003D0000-0x00000000003E5000-memory.dmp

            Filesize

            84KB

          • memory/2776-16-0x00000000003D0000-0x00000000003E5000-memory.dmp

            Filesize

            84KB

          • memory/2776-18-0x00000000003D0000-0x00000000003E5000-memory.dmp

            Filesize

            84KB

          • memory/2776-19-0x00000000003D0000-0x00000000003E5000-memory.dmp

            Filesize

            84KB

          • memory/3288-11-0x0000000000400000-0x0000000000456000-memory.dmp

            Filesize

            344KB

          • memory/3288-10-0x0000000000530000-0x0000000000630000-memory.dmp

            Filesize

            1024KB

          • memory/3288-17-0x0000000000400000-0x0000000000456000-memory.dmp

            Filesize

            344KB