Analysis

  • max time kernel
    1s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    09-01-2024 18:14

General

  • Target

    f1bdc796ba64b96cd4aaaf20ff3da0cc.exe

  • Size

    13.1MB

  • MD5

    f1bdc796ba64b96cd4aaaf20ff3da0cc

  • SHA1

    3853853e87d469821b136c75f4bc16b09a9c5a2b

  • SHA256

    46c879741fc6d476d4ff3edcd1b33c43c5b6107958925d706dd83fb0b1035f20

  • SHA512

    e6876df269d2c0559484e37b0da780191c45ae3a6b3d48b7dc01002e5a789e696a6fe7b9674e60d90e94bd5214a7ebb2012a3bd39bf381bc79d40aa33b5bf92a

  • SSDEEP

    24576:Vl3YWRibbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbn:

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
  • 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 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f1bdc796ba64b96cd4aaaf20ff3da0cc.exe
    "C:\Users\Admin\AppData\Local\Temp\f1bdc796ba64b96cd4aaaf20ff3da0cc.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2108
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tkfjqvcq\
      2⤵
        PID:2984
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xoohrpbp.exe" C:\Windows\SysWOW64\tkfjqvcq\
        2⤵
          PID:2828
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tkfjqvcq binPath= "C:\Windows\SysWOW64\tkfjqvcq\xoohrpbp.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1bdc796ba64b96cd4aaaf20ff3da0cc.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1976
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tkfjqvcq "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tkfjqvcq
          2⤵
          • Launches sc.exe
          PID:2716
        • 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:2696
      • C:\Windows\SysWOW64\tkfjqvcq\xoohrpbp.exe
        C:\Windows\SysWOW64\tkfjqvcq\xoohrpbp.exe /d"C:\Users\Admin\AppData\Local\Temp\f1bdc796ba64b96cd4aaaf20ff3da0cc.exe"
        1⤵
          PID:2584
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            2⤵
              PID:2496

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            92KB

            MD5

            95d8b5001eb28d09fde663a72bd7ae7c

            SHA1

            4956090d3205bfe636915d20ada2df11bcc17724

            SHA256

            9f170d518a831b8b7865f4bf8d3fda7209d6e3b2983ee5679cc99b37fff30102

            SHA512

            81d41c5bb723b70e15dfa0691a28fc6ba782022e7ae95aeca9059b7b37f8f6e57817d284a5e120da42c1a92964744b0858944b5d3176e27f60cec44152978ed0

          • C:\Windows\SysWOW64\tkfjqvcq\xoohrpbp.exe

            Filesize

            74KB

            MD5

            dc447c4c35fa4235d48c5b4d6eaa5d4c

            SHA1

            3b8bee08cd08cbb27d451ab10e8f5d24646b58bc

            SHA256

            82f03df5ee98f4d571cfa5215a85f1a760c301c6a6af5876673a02978219bd56

            SHA512

            4388d24f42b009b1f93410b6d7de860e75db428f545f16349c4d6a161ac911d70b18179e633beb7429905fe596e4f0fd81074484f400e8d17027f1d1cce30397

          • memory/2108-2-0x00000000003E0000-0x00000000003E1000-memory.dmp

            Filesize

            4KB

          • memory/2108-1-0x0000000000260000-0x0000000000261000-memory.dmp

            Filesize

            4KB

          • memory/2108-0-0x0000000000400000-0x0000000000425000-memory.dmp

            Filesize

            148KB

          • memory/2108-6-0x0000000000400000-0x0000000000425000-memory.dmp

            Filesize

            148KB

          • memory/2496-17-0x0000000000080000-0x0000000000095000-memory.dmp

            Filesize

            84KB

          • memory/2496-16-0x0000000000080000-0x0000000000095000-memory.dmp

            Filesize

            84KB

          • memory/2496-15-0x0000000000080000-0x0000000000095000-memory.dmp

            Filesize

            84KB

          • memory/2496-14-0x0000000000080000-0x0000000000095000-memory.dmp

            Filesize

            84KB

          • memory/2496-11-0x0000000000080000-0x0000000000095000-memory.dmp

            Filesize

            84KB

          • memory/2496-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            Filesize

            4KB

          • memory/2496-8-0x0000000000080000-0x0000000000095000-memory.dmp

            Filesize

            84KB

          • memory/2496-18-0x0000000000080000-0x0000000000095000-memory.dmp

            Filesize

            84KB

          • memory/2584-13-0x0000000000400000-0x0000000000425000-memory.dmp

            Filesize

            148KB