Satan Ransomware Adds More Evil Tricks

The latest changes to the Satan ransomware framework demonstrate attackers are changing their operations while targeting victims more carefully.

The operators and developers behind a 2-year-old ransomware framework, dubbed Satan, continue to expand the codebase, adding exploits for the Spring Web application framework, the ElasticSearch search engine, and ThinkPHP Web application framework popular in China, according to research from Fortinet.
The refinements demonstrate a trend in ransomware: The malware is becoming more sophisticated and operations against victims more targeted, according to the company. In
its quarterly threat report
, Fortinet points to multiple debilitating attacks on manufacturers, chemical companies, and engineering firms, stating that attackers are moving from indiscriminate ransomware attacks to more targeted and potentially more lucrative campaigns.
We are seeing more methodical techniques, says Anthony Giandomenico, a senior security researcher at Fortinet. Some of the adversaries that are using ransomware — they are getting better at quickly incorporating new vulnerabilities that have recently been successfully exploited.
The incorporation of three new exploits into the Satan ransomware framework highlights the continuing improvement in capabilities incorporated into the malicious software by operators and developers. Satan, which is the malware component of a ransomware-as-a-service offering on the Dark Web of the same name, had already included exploits for a variety of Web technologies, such as JBoss, Apache Struts, Web Logic, Tomcat, and the infamous EternalBlue exploit for Windows SMB services.
While
the addition of three new exploits
does not appreciably increase the threat level of the malware, it does show that the developers are actively improving the code and the service, Fortinets Giandomenico says.
The ransomware-as-a-service is successful in that it is taking advantage of those vulnerabilities that have been exploited much faster, he says.
Ransomware attacks garner a great deal of attention. The malware payload, which typically encrypts valuable data until a victims pays the ransom, impacts both the operations of victims and causes obvious symptoms of an attack, such as displaying ransom notes on monitors. In the past five years, significant attacks have shown the danger of malware that makes data essentially unusable.
The 2014 attack on Sony Pictures
had a wiper componen
t that erased systems and forced the company to take weeks to clean its information-technology environment and recover business data. In 2017, two worms — WannaCry and NotPetya —
spread through companies IT systems, disrupting operations
for manufacturing giants such as pharmaceutical maker Merck, auto maker Nissan, and shipping conglomerate AB Maersk. Most recently, ransomware
disrupted government systems and services in the city of Baltimore
.
In January 2017, Satan made headlines as the first known ransomware-as-a-service offering — but not the first crimeware-as-a-service product — on the Dark Web. Subscribers can create tailored ransomware attacks, and the operators of the Satan service take a portion of any ransom paid.
The malware created by Satan also can spread on its own. Once Satan compromises a system, the malware attempts to execute its list of exploits against each IP addresses on the local network.
The attack can also be used against publicly accesible servers. The malware will reach out to one of the command-and-control (C2) servers, retrieve a Class C subnet to attacks, and then enumerate every IP address on that network and attempt to spread.
While WannaCry and NotPetya raised fears that mass ransomware infections could hobble businesses and governments, attackers have seemingly gone in the opposite direction. By targeting specific companies, or at least manually taking over attacks against those companies, the ransomware operators can do the most damage and levy higher fees for recovery, Giandomenico says.
Ransomware is also becoming more of a capability of malware and a potential tool to use during attacks, he says.
I would put money on the fact that we will see more targeted attacks that are using ransomware, Giandomenico says. It will be multistaged. They may do other things on the network first, and when they are finished, they will slap some ransomware in there to cover their tracks or convert the compromise to cash.
With Satan, the attackers look ready to continue to target more applications with vulnerabilities. The current version of the malware platform scans for applications such as Drupal, Adobe, and XML-RPC, but does not yet have the exploits to compromise the applications. Instead, it reports their existence to the C2 servers.
Most likely, its purpose is to gather statistics of application usage that can be targeted in future attacks, Fortinets analysis stated. The malware authors can easily update their spreader to implement an exploit against one of these applications if they observe that enough of clients that are using it.
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