Analysis

  • max time kernel
    150s
  • max time network
    155s
  • 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, 17:41

General

  • Target

    dfbd4be3187891db496fee51595274f1.exe

  • Size

    166KB

  • MD5

    dfbd4be3187891db496fee51595274f1

  • SHA1

    f7aa5bea583950b0e0025905abc8e59ad4ef6e02

  • SHA256

    76782ff9477534ad7cdd3235749e7c508174042c9300c136291b8cdee3338544

  • SHA512

    0e2c6a8553cdcfc1dbc03fbc44d41ce97502a9b1f7280717a43535952b1f206b8cf1925272fffc56ac1dddf10c32ed485ac6efc272422ba3437dd267fbe5edf6

  • SSDEEP

    3072:JxpC1d8ASZDRiJ51sZbQKDXDxob5Asie6KY211YdsVFfDTJQKt:JbDXZs+Dxtpei2HYaVxD7

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).

  • Program crash 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dfbd4be3187891db496fee51595274f1.exe
    "C:\Users\Admin\AppData\Local\Temp\dfbd4be3187891db496fee51595274f1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3468
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dlxntsca\
      2⤵
        PID:4456
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pggzpopd.exe" C:\Windows\SysWOW64\dlxntsca\
        2⤵
          PID:660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dlxntsca binPath= "C:\Windows\SysWOW64\dlxntsca\pggzpopd.exe /d\"C:\Users\Admin\AppData\Local\Temp\dfbd4be3187891db496fee51595274f1.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2348
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dlxntsca "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:532
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dlxntsca
          2⤵
          • Launches sc.exe
          PID:2084
        • 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:2664
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3468 -s 1036
          2⤵
          • Program crash
          PID:416
      • C:\Windows\SysWOW64\dlxntsca\pggzpopd.exe
        C:\Windows\SysWOW64\dlxntsca\pggzpopd.exe /d"C:\Users\Admin\AppData\Local\Temp\dfbd4be3187891db496fee51595274f1.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:404
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          PID:4612
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 536
          2⤵
          • Program crash
          PID:3560
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3468 -ip 3468
        1⤵
          PID:1444
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 404 -ip 404
          1⤵
            PID:4472
          • 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=1420 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
            1⤵
              PID:3496

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              13.1MB

              MD5

              340b4d9596abb7a55bb99f10ab1bedf3

              SHA1

              ebd657e7b9a02b95fe4c70c7b68dde5b101e984c

              SHA256

              d3b91a31a2c61f632ec87613c61b5440ddb70c41a60669294bd1514113f848a3

              SHA512

              2796354c759b9ef9ddd461136a3c6af473914fac023400a4b0808c77fe3369fdf9cbb9e9b470057a3f562f1248156f7cb54a8dd6ec8bdaa01f39678ec5f9bd0f

            • memory/404-17-0x0000000000400000-0x0000000002CB9000-memory.dmp

              Filesize

              40.7MB

            • memory/404-14-0x0000000002EA0000-0x0000000002FA0000-memory.dmp

              Filesize

              1024KB

            • memory/404-11-0x0000000000400000-0x0000000002CB9000-memory.dmp

              Filesize

              40.7MB

            • memory/3468-5-0x0000000000400000-0x0000000002CB9000-memory.dmp

              Filesize

              40.7MB

            • memory/3468-9-0x0000000000400000-0x0000000002CB9000-memory.dmp

              Filesize

              40.7MB

            • memory/3468-10-0x0000000002E60000-0x0000000002E73000-memory.dmp

              Filesize

              76KB

            • memory/3468-1-0x0000000002EC0000-0x0000000002FC0000-memory.dmp

              Filesize

              1024KB

            • memory/3468-4-0x0000000000400000-0x0000000002CB9000-memory.dmp

              Filesize

              40.7MB

            • memory/3468-2-0x0000000002E60000-0x0000000002E73000-memory.dmp

              Filesize

              76KB

            • memory/4612-12-0x00000000003B0000-0x00000000003C5000-memory.dmp

              Filesize

              84KB

            • memory/4612-13-0x00000000003B0000-0x00000000003C5000-memory.dmp

              Filesize

              84KB

            • memory/4612-16-0x00000000003B0000-0x00000000003C5000-memory.dmp

              Filesize

              84KB

            • memory/4612-18-0x00000000003B0000-0x00000000003C5000-memory.dmp

              Filesize

              84KB

            • memory/4612-19-0x00000000003B0000-0x00000000003C5000-memory.dmp

              Filesize

              84KB