Analysis

  • max time kernel
    145s
  • max time network
    118s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    14-12-2020 13:52

General

  • Target

    1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe

  • Size

    12.9MB

  • MD5

    1fa3e0cc0442dbb6f0fcfe20ee1aba66

  • SHA1

    423fbcc2ee9b37cb6878ce0a57f4d008b6d06ce5

  • SHA256

    09e707025066b12df30cef409b036a8e74e9ef66c9ea1398bee9bdce3b4d0d1b

  • SHA512

    447bb43df9d5dab44aba597de97889c15350a517fcef456d378347f77623043b9b215f3e022e97630b776d887e5c03a09b0d444d1d7d5a45bdb2b4f488477a95

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
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe

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

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe
    "C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:652
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iwhxkbqb\
      2⤵
        PID:4032
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpqkfbcz.exe" C:\Windows\SysWOW64\iwhxkbqb\
        2⤵
          PID:3824
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create iwhxkbqb binPath= "C:\Windows\SysWOW64\iwhxkbqb\dpqkfbcz.exe /d\"C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:560
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description iwhxkbqb "wifi internet conection"
            2⤵
              PID:192
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start iwhxkbqb
              2⤵
                PID:636
              • 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:3948
              • C:\Windows\SysWOW64\iwhxkbqb\dpqkfbcz.exe
                C:\Windows\SysWOW64\iwhxkbqb\dpqkfbcz.exe /d"C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:2308
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Deletes itself
                  PID:1380

              Network

              MITRE ATT&CK Matrix ATT&CK v6

              Persistence

              New Service

              1
              T1050

              Modify Existing Service

              1
              T1031

              Registry Run Keys / Startup Folder

              1
              T1060

              Privilege Escalation

              New Service

              1
              T1050

              Defense Evasion

              Disabling Security Tools

              1
              T1089

              Modify Registry

              2
              T1112

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                23bb6bbac9b78d92dea6141177a310b1

                SHA1

                0aa41e2e63680d164ecf5535eef847019895f5b7

                SHA256

                7f49800262b39066f174a97a8984c7b892812b6f1289956eec34215e7e908ce8

                SHA512

                0c57f1afe554231bc277174dbaf62967ea04b384937a989fba9ebf4181f2727bf91884dc45f958373037dfefd37f810f51844014193c28f5659e6f4f9bc555a1

              • C:\Windows\SysWOW64\iwhxkbqb\dpqkfbcz.exe
                MD5

                23bb6bbac9b78d92dea6141177a310b1

                SHA1

                0aa41e2e63680d164ecf5535eef847019895f5b7

                SHA256

                7f49800262b39066f174a97a8984c7b892812b6f1289956eec34215e7e908ce8

                SHA512

                0c57f1afe554231bc277174dbaf62967ea04b384937a989fba9ebf4181f2727bf91884dc45f958373037dfefd37f810f51844014193c28f5659e6f4f9bc555a1

              • memory/192-6-0x0000000000000000-mapping.dmp
              • memory/560-5-0x0000000000000000-mapping.dmp
              • memory/636-7-0x0000000000000000-mapping.dmp
              • memory/1380-9-0x0000000000DA0000-0x0000000000DB5000-memory.dmp
                Filesize

                84KB

              • memory/1380-10-0x0000000000DA9A6B-mapping.dmp
              • memory/3824-3-0x0000000000000000-mapping.dmp
              • memory/3948-12-0x0000000000000000-mapping.dmp
              • memory/4032-2-0x0000000000000000-mapping.dmp