Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Comments
New Linux Worm Attacks IoT Devices
Newest First  |  Oldest First  |  Threaded View
Page 1 / 2   >   >>
RyanSepe
50%
50%
RyanSepe,
User Rank: Ninja
6/30/2019 | 9:02:42 AM
Re: Defaults
That's depressing.
tdsan
50%
50%
tdsan,
User Rank: Ninja
6/29/2019 | 8:34:21 PM
Re: Defaults
RyanSepe
50%
50%
RyanSepe,
User Rank: Ninja
6/29/2019 | 8:16:53 PM
Re: Defaults
Definitely concur here. But obviously there are still those out there who are foolish enough for this to still be effective. :( Its quite sad.
tdsan
50%
50%
tdsan,
User Rank: Ninja
6/28/2019 | 8:46:28 PM
Re: For fun
"the software is purely destructive; it captures no data and asks for no ransom. Researcher Ankit Anubhav traced the malware back to its origins and found the developer, who uses the online name "Light Leafon." " Obviously this was for fun. Distraction is huge.

I am not so sure it was all for fun, I think it was also being used to test its capability for another purpose. Think about this, if the actor could access systems with default passwords, then what about writing a hash algorithm to run a for loop to check for possible password combinations.
  1. Check to see if they can get to the device and apply a default username and password
  2. Create a payload or add a function statement that goes through a list of passwords

I think this is a logical step in their next attempt but again we are theorizing, only time will tell.
import getpass
import sys
import telnetlib
import time

#Getting the user information
user=input("Enter User name: ")
password=getpass.getpass()

#open file
iplist=open("ipfile.txt")

#Loop through IP address and execute commands
for line in  iplist:

 Host=line.strip("\n")    
 print ("Configuring Switch",Host)
 tn = telnetlib.Telnet(Host)    
 tn.read_until(b"Username: ")   
 tn.write(user.encode('ascii') + b"\n")
 tn.read_until(b"Password: ")
 tn.write(password.encode('ascii')+b"\n")
 time.sleep(2)     
 tn.write(b"enable\n")  
 time.sleep(2)
 tn.write(b"admin\n")  
 time.sleep(2)
 tn.write(b"config t\n")
 time.sleep(2)
 tn.write(b"snmp-server community Secured ro\n") 
 print ("Switch ",Host,"Configured")
 line=tn.read_some()
 tn.close()                           
 print (line)                      

#closing file 
ipfile.close()

 Todd
tdsan
50%
50%
tdsan,
User Rank: Ninja
6/28/2019 | 7:40:48 PM
Re: Linux Worm Exploits and Defenses
Yes, I agree, that is why I had mentioned in my excert that the vendor should disable telnet altogether or block it.

In addition, companies like Cisco and Juniper ask the user to change the default password. If the user does not change the password then the system should be halted until they change it based on recommended security guidelines (listed below).

NIST password guidelines - "NIST guidance recommends the following for passwords: An eight character minimum and 64 character maximum length. The ability to use all special characters but no special requirement to use them."
  • An eight character minimum and 64 character maximum length
  • The ability to use all special characters but no special requirement to use them
  • Restrict sequential and repetitive characters (e.g. 12345 or aaaaaa)
  • Restrict context specific passwords (e.g. the name of the site, etc.)
  • Restrict commonly used passwords (e.g. [email protected], etc.)
  • Restrict passwords obtained from previous breach corpuses
NIST Security Password Guidelines

Todd

 
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
6/28/2019 | 6:47:51 PM
Defaults
It could attack any Linux system deployed on the Internet with open telnet ports and default admin credentials. So it is not supposed to be an attack at all. Who would leave defaults as they are today?
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
6/28/2019 | 6:46:12 PM
Re: Linux Worm Exploits and Defenses
The IoT devices related to the internet. That is why they become vulnerable too.
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
6/28/2019 | 6:44:13 PM
Re: Linux Worm Exploits and Defenses
A number of companies are doing this but after reading the report, it seems this practice is not performed across the board. Most SME would not pay enough attention to it so they mostly miss it.
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
6/28/2019 | 6:42:14 PM
Re: Linux Worm Exploits and Defenses
I do agree the responsibility should rest with the consumer where the system asks or provides insight on how to change the admin password Anting left to consumers will be at high risk. Better to avoid expecting anything from consumers.
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
6/28/2019 | 6:40:46 PM
For fun
the software is purely destructive; it captures no data and asks for no ransom. Researcher Ankit Anubhav traced the malware back to its origins and found the developer, who uses the online name "Light Leafon." Obviously this was for fun. Distraction is huge.
Page 1 / 2   >   >>


HackerOne Drops Mobile Voting App Vendor Voatz
Dark Reading Staff 3/30/2020
Limited-Time Free Offers to Secure the Enterprise Amid COVID-19
Curtis Franklin Jr., Senior Editor at Dark Reading,  3/31/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
6 Emerging Cyber Threats That Enterprises Face in 2020
This Tech Digest gives an in-depth look at six emerging cyber threats that enterprises could face in 2020. Download your copy today!
Flash Poll
State of Cybersecurity Incident Response
State of Cybersecurity Incident Response
Data breaches and regulations have forced organizations to pay closer attention to the security incident response function. However, security leaders may be overestimating their ability to detect and respond to security incidents. Read this report to find out more.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-11527
PUBLISHED: 2020-04-04
In Zoho ManageEngine OpManager before 12.4.181, an unauthenticated remote attacker can send a specially crafted URI to read arbitrary files.
CVE-2020-11528
PUBLISHED: 2020-04-04
bit2spr 1992-06-07 has a stack-based buffer overflow (129-byte write) in conv_bitmap in bit2spr.c via a long line in a bitmap file.
CVE-2020-11518
PUBLISHED: 2020-04-04
Zoho ManageEngine ADSelfService Plus before 5815 allows unauthenticated remote code execution.
CVE-2020-5347
PUBLISHED: 2020-04-04
Dell EMC Isilon OneFS versions 8.2.2 and earlier contain a denial of service vulnerability. SmartConnect had an error condition that may be triggered to loop, using CPU and potentially preventing other SmartConnect DNS responses.
CVE-2020-5348
PUBLISHED: 2020-04-04
Dell Latitude 7202 Rugged Tablet BIOS versions prior to A28 contain a UAF vulnerability in EFI_BOOT_SERVICES in system management mode. A local unauthenticated attacker may exploit this vulnerability by overwriting the EFI_BOOT_SERVICES structure to execute arbitrary code in system management mode.