Analysis

  • max time kernel
    141s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    13/03/2024, 03:44

General

  • Target

    c4e30adbc0004c8b24f86e36cfff81f7.exe

  • Size

    13.0MB

  • MD5

    c4e30adbc0004c8b24f86e36cfff81f7

  • SHA1

    e77b025e8ae17a4c8485929593118423f745423b

  • SHA256

    901847a959678fa8c5a673996b31303d6de209e124ad922debe57f019c38fe25

  • SHA512

    460e5b118caa460ea144fa9d03bb09aa80085be28d3890dc0c03761a773f15d20e57e9e0a4886ba82fcc3a89d80ad36a44972c60e603d3bf19397ae0a8c5f21f

  • SSDEEP

    49152:NQsPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP:NQ

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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).

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe
    "C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ezwsjjsy\
      2⤵
        PID:1768
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nlsonwul.exe" C:\Windows\SysWOW64\ezwsjjsy\
        2⤵
          PID:1908
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ezwsjjsy binPath= "C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.exe /d\"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2104
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ezwsjjsy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2664
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ezwsjjsy
          2⤵
          • Launches sc.exe
          PID:2528
        • 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:2424
      • C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.exe
        C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.exe /d"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2068
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2584

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              14.2MB

              MD5

              79e4d24d8728cabc83e1765ff05f86de

              SHA1

              dc375306e7e7f6ea65c07880786322e18a0443c6

              SHA256

              05a7e9d48b9a89d570d9f0a000785be551f7eefd3f15babdc2a5387aad9486d2

              SHA512

              aaece4f61e38be2de2498e05bfc0dd85aebfb029530dda7dadef4c6a15a6957d5d7a135e3ca0b085bd0273380219f2454308bc5c408bd71eb3ea9ccdaa17d470

            • C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.exe

              Filesize

              3.7MB

              MD5

              0546a906f72bf1b11637caa4da9f48d5

              SHA1

              a8b197068200ad072ca9e2ffe7cae035effeb4a9

              SHA256

              b21eb5ab574e6acc03ac86bafb5700324e8acf56e1b93e1241ca8d161af6671a

              SHA512

              75b374c76d6bdeccb7ca214f6382018352c5b79216d75ea695e01d79a70a50799ec60ba5b25558e5cd22e6439b8ae2f4948865fbe611dd195c904ebd296fd1d1

            • memory/1964-0-0x0000000000400000-0x0000000000C56000-memory.dmp

              Filesize

              8.3MB

            • memory/1964-2-0x0000000000D90000-0x0000000000E90000-memory.dmp

              Filesize

              1024KB

            • memory/1964-4-0x0000000000400000-0x0000000000C56000-memory.dmp

              Filesize

              8.3MB

            • memory/1964-6-0x0000000000400000-0x0000000000C56000-memory.dmp

              Filesize

              8.3MB

            • memory/1964-7-0x0000000000D90000-0x0000000000E90000-memory.dmp

              Filesize

              1024KB

            • memory/2068-11-0x0000000000DC0000-0x0000000000EC0000-memory.dmp

              Filesize

              1024KB

            • memory/2068-9-0x0000000000400000-0x0000000000C56000-memory.dmp

              Filesize

              8.3MB

            • memory/2068-14-0x0000000000400000-0x0000000000C56000-memory.dmp

              Filesize

              8.3MB

            • memory/2068-20-0x0000000000400000-0x0000000000C56000-memory.dmp

              Filesize

              8.3MB

            • memory/2584-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2584-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2584-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2584-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2584-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2584-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2584-23-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB