Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/03/2024, 10:51

General

  • Target

    defc1cba4b8990663ca51d25a32af585.exe

  • Size

    10.4MB

  • MD5

    defc1cba4b8990663ca51d25a32af585

  • SHA1

    1a8a9c95794480980c208ceecdb4cedc4a09b058

  • SHA256

    5ab3671466c3136f8b9cd603f45ce7a038c9b8ed2ea58a713c5fff6a0928f729

  • SHA512

    0402ca1c999925d96c892252a1d9dd4276f258fb30a622b347e45da1acaa994be0f6893db5383d86bc10f12b8b7c5af7372a71826f946a05d9270b5bb3986f76

  • SSDEEP

    24576:0erU5sWbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb7:0sW

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\defc1cba4b8990663ca51d25a32af585.exe
    "C:\Users\Admin\AppData\Local\Temp\defc1cba4b8990663ca51d25a32af585.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2972
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tfmoiayo\
      2⤵
        PID:1696
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pkzjotlj.exe" C:\Windows\SysWOW64\tfmoiayo\
        2⤵
          PID:4036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tfmoiayo binPath= "C:\Windows\SysWOW64\tfmoiayo\pkzjotlj.exe /d\"C:\Users\Admin\AppData\Local\Temp\defc1cba4b8990663ca51d25a32af585.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2364
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tfmoiayo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:640
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tfmoiayo
          2⤵
          • Launches sc.exe
          PID:1996
        • 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:4420
      • C:\Windows\SysWOW64\tfmoiayo\pkzjotlj.exe
        C:\Windows\SysWOW64\tfmoiayo\pkzjotlj.exe /d"C:\Users\Admin\AppData\Local\Temp\defc1cba4b8990663ca51d25a32af585.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2356
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          PID:4064
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3756 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:3244

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          3.1MB

          MD5

          7a7d8e685d73e16fba5f07545e2e30e1

          SHA1

          d51b90b4b0dca940bd5bff0b47a271886077089c

          SHA256

          1cd00f194ea2de04b6b0d172b0d4bb9902a48158f2e7a8abcc7b912afe478825

          SHA512

          f6b2424fa359f5de1aadf596677d121f8c496f68defb8907ceb8d6ea3b8e2478e7aff7349b25a841ea2cacdd3f3229f409eab8d4b32cd635ac8b8c7923ab31f5

        • C:\Windows\SysWOW64\tfmoiayo\pkzjotlj.exe

          Filesize

          11.2MB

          MD5

          915b763ff0061e425de41661a17a1145

          SHA1

          f997ee91041812e0cbe3495d5aa2024163207b5a

          SHA256

          3049561f36725332e61295b59f0773d98e02a8680b1369de359e7b4cf72cfd4d

          SHA512

          5356720202dd835d820be1d7cd1c7e82c365cb5ee6c88cc605495346e5686eeb40268257584c455a3fea6c46896177b468ace484e24c478151bd3f14ed2f2ee2

        • memory/2356-17-0x0000000000400000-0x000000000046D000-memory.dmp

          Filesize

          436KB

        • memory/2356-9-0x0000000000660000-0x0000000000760000-memory.dmp

          Filesize

          1024KB

        • memory/2356-10-0x0000000000400000-0x000000000046D000-memory.dmp

          Filesize

          436KB

        • memory/2972-14-0x00000000006B0000-0x00000000007B0000-memory.dmp

          Filesize

          1024KB

        • memory/2972-2-0x00000000021B0000-0x00000000021C3000-memory.dmp

          Filesize

          76KB

        • memory/2972-3-0x0000000000400000-0x000000000046D000-memory.dmp

          Filesize

          436KB

        • memory/2972-5-0x0000000000400000-0x000000000046D000-memory.dmp

          Filesize

          436KB

        • memory/2972-16-0x0000000000400000-0x000000000046D000-memory.dmp

          Filesize

          436KB

        • memory/2972-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

          Filesize

          1024KB

        • memory/2972-21-0x00000000021B0000-0x00000000021C3000-memory.dmp

          Filesize

          76KB

        • memory/4064-11-0x0000000000850000-0x0000000000865000-memory.dmp

          Filesize

          84KB

        • memory/4064-15-0x0000000000850000-0x0000000000865000-memory.dmp

          Filesize

          84KB

        • memory/4064-18-0x0000000000850000-0x0000000000865000-memory.dmp

          Filesize

          84KB

        • memory/4064-19-0x0000000000850000-0x0000000000865000-memory.dmp

          Filesize

          84KB

        • memory/4064-27-0x0000000000850000-0x0000000000865000-memory.dmp

          Filesize

          84KB