Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    24-05-2024 04:25

General

  • Target

    a6c7dd82eace106350d20d93956360e6.exe

  • Size

    178KB

  • MD5

    a6c7dd82eace106350d20d93956360e6

  • SHA1

    19c5ea0607b527e4c2b08a39583db38f503933e0

  • SHA256

    b7ab94357342f73380569c9b23bc81741e1784b8a7cfdfe8df680000a1f3da1f

  • SHA512

    6e3d950e1a16103710985e9e0993f26ece5f7d67eadbd711941e826117d0d884624ddf166d3a70e25453518bb2f7d9a9c2dede25f6785dcb24d6031ba29c419e

  • SSDEEP

    1536:DAc76NGJEzLoCPMkXzxIGzA9aRmNjo/Phcnr6xMtxUtoIlESP5tA9bDQqpN+X:D7kXzxIGzA9aUo/PhcnVHUtoe5K9

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a6c7dd82eace106350d20d93956360e6.exe
    "C:\Users\Admin\AppData\Local\Temp\a6c7dd82eace106350d20d93956360e6.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2984
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wgcpxlju\
      2⤵
        PID:2596
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\omwxzvye.exe" C:\Windows\SysWOW64\wgcpxlju\
        2⤵
          PID:2840
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wgcpxlju binPath= "C:\Windows\SysWOW64\wgcpxlju\omwxzvye.exe /d\"C:\Users\Admin\AppData\Local\Temp\a6c7dd82eace106350d20d93956360e6.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wgcpxlju "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wgcpxlju
          2⤵
          • Launches sc.exe
          PID:2804
        • 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 Windows Firewall
          PID:2712
      • C:\Windows\SysWOW64\wgcpxlju\omwxzvye.exe
        C:\Windows\SysWOW64\wgcpxlju\omwxzvye.exe /d"C:\Users\Admin\AppData\Local\Temp\a6c7dd82eace106350d20d93956360e6.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2932
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2692

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\omwxzvye.exe

        Filesize

        13.7MB

        MD5

        0c2fc7181948e92fcfa1b383b1aef3dc

        SHA1

        19a273a81589c6dfd1af35751be0aea66ddee137

        SHA256

        75f654dd3243c0917a0a929eee9798279dd42123538112a78f18f9c264f0a6a8

        SHA512

        2532980d9501985d78773728a662bff6232f4264c5134f126b148d2bebab8966876b265bff20d65b0bb0e5f110fa112c13d11f89aab83dcf0196fed2dec2a570

      • memory/2692-24-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2692-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2692-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2692-8-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2692-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-46-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-47-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

      • memory/2692-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2692-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2692-27-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-50-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

      • memory/2692-51-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2692-30-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-34-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-33-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-32-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-31-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-35-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-54-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2692-23-0x0000000001990000-0x0000000001B9F000-memory.dmp

        Filesize

        2.1MB

      • memory/2692-20-0x0000000001990000-0x0000000001B9F000-memory.dmp

        Filesize

        2.1MB

      • memory/2692-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2692-55-0x0000000000150000-0x0000000000157000-memory.dmp

        Filesize

        28KB

      • memory/2932-16-0x0000000000400000-0x0000000002349000-memory.dmp

        Filesize

        31.3MB

      • memory/2984-1-0x0000000002400000-0x0000000002500000-memory.dmp

        Filesize

        1024KB

      • memory/2984-4-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2984-12-0x0000000000400000-0x0000000002349000-memory.dmp

        Filesize

        31.3MB

      • memory/2984-14-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2984-15-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2984-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB