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DFIR | [Fix] Cuckoo Error : Error starting virtual machine | VBoxManager error

If you are reading this, you might probably encountered the following error while performing the sample analysis in Cuckoo,  Error starting Virtual Machine / VBoxManage error.  This error happens when there is some communication issue between the guest and host or with the VM snapshot. The network configuration of the guest VM should be set as "Host only network" and verify the connectivity between the host and Guest by pinging each other. If that is fine, then check the guest VM snapshot. In my case, i had multiple snapshot and the one Cuckoo was invoking creates the issue. What i did was, i deleted all the existing snapshots and created a clean snapshot, also did a graceful shutdown of the Guest VM (Windows 7 in my case). Also noticed that, while running cuckoo, it try to load the VM snapshot named base2 . Instead of editing any configurations,  i just named the snapshot "base2". Then i put a sample on Cuckoo for analysis. The process completed without any issues.

Pivoting via Meterpreter [metasploit v6.x]

Pivoting is a technique used during Pentesting. The attacker gain access on one of the remote machine in the target network segment and use that machine to move around another network.

Pivoting is useful in a scenario where you don't have direct access to a remote network. For example, the attacker can access the DMZ server but not the Internal Server segment. But DMZ server can communicate with Internal Server Segment. In such scenario, firstly the attacker gain access to the DMZ server and then use the DMZ server as a foothold to gain access to the Internal Server Segment.

Note that the older versions of metasploit supports MSF scripts but the latest version (metasploit 6.x) doesn't support it. So lets see how to perform pivoting using the newer versions of Metasploit. For the illustration, i assume that the attacker has been gained the access to one of the remote machine and now he needs to move around.

After establishing a meterpreter shell, background it. Since msfscripts are deprecated, we should use the post/multi/manage/autoroute module.

msf> use post/multi/manage/autoroute
    -set the SUBNET (new network range)
    -set the SESSION (meterpreter session)
    -run
You may see the following message after executing the module.   
    [!] SESSION may not be compatible with this module (incompatible session platform: windows)
    [*] Running module against PC-1
    [*] Adding a route to 172.16.10.0/255.255.255.0...
    [+] Route added to subnet 172.16.10.0/255.255.255.0.
    [*] Post module execution completed 

Alternatively, you can add the route manually, using the following command from msfconsole.
route add 172.16.10.0/24 1
    -where 1 is the meterpreter session.

Now the route has been added successfully. Lets do a port-scan of the remote network (172.16.10.0/24)
To run a port scan of the target network using metasploit,
use auxiliary/scanner/portscan/tcp
set RHOSTS //
Specify the network
set THREADS //
Specify the threads
set PORTS //
Specify the ports to scan
run

 If you would like to know how to pivot through different network, read this post.




 

 

 



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