Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-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.

  • 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.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c55440db0a749fe01816496b4aea5656.exe
    "C:\Users\Admin\AppData\Local\Temp\c55440db0a749fe01816496b4aea5656.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:996
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\apjadpmr\
      2⤵
        PID:3484
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wfnlegjj.exe" C:\Windows\SysWOW64\apjadpmr\
        2⤵
          PID:1748
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create apjadpmr binPath= "C:\Windows\SysWOW64\apjadpmr\wfnlegjj.exe /d\"C:\Users\Admin\AppData\Local\Temp\c55440db0a749fe01816496b4aea5656.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4928
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description apjadpmr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1364
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start apjadpmr
          2⤵
          • Launches sc.exe
          PID:4960
        • 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:1696
      • C:\Windows\SysWOW64\apjadpmr\wfnlegjj.exe
        C:\Windows\SysWOW64\apjadpmr\wfnlegjj.exe /d"C:\Users\Admin\AppData\Local\Temp\c55440db0a749fe01816496b4aea5656.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4028
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          PID:1236

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.0MB

              MD5

              08bfdfe7b7e767ad2991a7fc48228bec

              SHA1

              57dafdf658952e4ed2c3945572a10a19654d0814

              SHA256

              4c8846586dcc03d751099a1e4d4fe70b78289d0bc1764f01c55063c84c3ae15f

              SHA512

              dde800be49d17d2cdbdf6367c4f48ee012fc60cbbb7c32ce8139523b326fab9c45ae3618ac7042c77b3d16991eb4c3dd24db25ea7f42362017d83d0552bd1aaa

            • memory/996-1-0x0000000000760000-0x0000000000860000-memory.dmp

              Filesize

              1024KB

            • memory/996-2-0x0000000000700000-0x0000000000713000-memory.dmp

              Filesize

              76KB

            • memory/996-4-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/996-23-0x0000000000760000-0x0000000000860000-memory.dmp

              Filesize

              1024KB

            • memory/996-14-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/1236-10-0x0000000000B50000-0x0000000000B65000-memory.dmp

              Filesize

              84KB

            • memory/1236-13-0x0000000000B50000-0x0000000000B65000-memory.dmp

              Filesize

              84KB

            • memory/1236-15-0x0000000000B50000-0x0000000000B65000-memory.dmp

              Filesize

              84KB

            • memory/1236-16-0x0000000000B50000-0x0000000000B65000-memory.dmp

              Filesize

              84KB

            • memory/1236-25-0x0000000000B50000-0x0000000000B65000-memory.dmp

              Filesize

              84KB

            • memory/4028-9-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/4028-17-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/4028-22-0x00000000004E0000-0x00000000004F3000-memory.dmp

              Filesize

              76KB

            • memory/4028-8-0x0000000000560000-0x0000000000660000-memory.dmp

              Filesize

              1024KB