Analysis

  • max time kernel
    146s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    13/03/2024, 07:36

General

  • Target

    c55440db0a749fe01816496b4aea5656.exe

  • Size

    13.9MB

  • MD5

    c55440db0a749fe01816496b4aea5656

  • SHA1

    b8310b4fb9e13cb55d35407b7d7f8d8ea109b934

  • SHA256

    eb5ad872fce2860c2f6f83a6ee8966ad99c3603f8ece08657415160d163b9647

  • SHA512

    10eaabbd5c9550e78fcc125a58170bfddf29dc03e1f4180b3db6ec70e8b85003724d54554e892c8b56414c9af5c8d3fef85818b317366c8d3547af195bd04dc7

  • SSDEEP

    24576:RjDuKnh7YzbKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB/:Rnh

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.

  • 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\c55440db0a749fe01816496b4aea5656.exe
    "C:\Users\Admin\AppData\Local\Temp\c55440db0a749fe01816496b4aea5656.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ajsksirw\
      2⤵
        PID:2916
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bokaipku.exe" C:\Windows\SysWOW64\ajsksirw\
        2⤵
          PID:2580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ajsksirw binPath= "C:\Windows\SysWOW64\ajsksirw\bokaipku.exe /d\"C:\Users\Admin\AppData\Local\Temp\c55440db0a749fe01816496b4aea5656.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2168
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ajsksirw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2812
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ajsksirw
          2⤵
          • Launches sc.exe
          PID:2488
        • 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:2412
      • C:\Windows\SysWOW64\ajsksirw\bokaipku.exe
        C:\Windows\SysWOW64\ajsksirw\bokaipku.exe /d"C:\Users\Admin\AppData\Local\Temp\c55440db0a749fe01816496b4aea5656.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2408
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2388

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              12.6MB

              MD5

              d482a790338406f8bf4ec94aa71a8447

              SHA1

              6352ae87db31694d5d0c9f8ef36dfe33cf7fdfba

              SHA256

              84cca3f82382c161428f4c1bfa00034e907a0a45f715b30a2f1c5642de3cf960

              SHA512

              fc38536cc83bdf1bb4a46896c3901d75c57569f128840b37aabd4d1dcafeeaaf4160bf20dd539a793e601d9ae2cf560a544d1f4d59dffa1e1e87bb29c2b33b33

            • memory/2040-1-0x0000000000230000-0x0000000000330000-memory.dmp

              Filesize

              1024KB

            • memory/2040-4-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/2040-3-0x00000000003A0000-0x00000000003B3000-memory.dmp

              Filesize

              76KB

            • memory/2040-8-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/2388-9-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2388-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2388-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2388-18-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2388-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2388-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2388-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2408-14-0x00000000005C0000-0x00000000006C0000-memory.dmp

              Filesize

              1024KB

            • memory/2408-15-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB