[BreachExchange] Maze ransomware was behind Pensacola “cyber event,” Florida officials say
destry at riskbasedsecurity.com
Fri Dec 13 10:04:30 EST 2019
An email sent by the Florida Department of Law Enforcement to all
Florida county commissioners indicated that the ransomware that struck
the city of Pensacola on December 7 was the same malware used in an
attack against the private security firm Allied Universal, according
to a report by the Pensacola News Journal. That malware has been
identified elsewhere as Maze, a form of ransomware that has also been
distributed via spam email campaigns in Italy.
Bleeping Computer's Lawrence Abrams reported in November that the Maze
operators had contacted him after the Allied Universal attack,
claiming to have stolen files from the company before encrypting them
on the victims' computers. After Allied apparently missed the deadline
for payment of the ransom on the files, the ransomware operators
published 700 megabytes of files from Allied and demanded 300 Bitcoins
(approximately $2.3 million) to decrypt the network. The Maze
operators told Abrams that they always steal victims' files to use as
further leverage to get them to pay:
It is just a logic. If we disclose it who will believe us? It is not
in our interest, it will be silly to disclose as we gain nothing from
it. We also delete data because it is not really interesting. We are
neither espionage group nor any other type of APT, the data is not
interesting for us.
Stealing data as proof of compromise—and to therefore encourage
payment by ransomware victims—is rare but not new. The RobbinHood
ransomware operator that attacked Baltimore City in May also stole
files as part of the attack and posted screenshots of some files—faxed
documents sent to Baltimore City Hall's fax server—on a Twitter
account to encourage city officials to pay. Baltimore did not pay the
Theft of data opens up another problem for targets of ransomware who
in the past would pay quietly to decrypt their data, as it introduces
the possibility that they will have to report the breach to customers
and government regulators. So in some cases, it may ironically remove
some of the motivation for victims to pay, since their data may be
sold off by the attackers whether they pay or not.
The use of the data to blackmail the victim, and in Allied's case, the
threat to use Allied's certificates and domain name to spam customers
with additional ransomware attacks, is something new."This is fhe
first time this has ever happened, as far as we know," said Brett
Callow, a spokesperson for the antivirus software vendor Emisoft."
Ransomware groups usually encrypt, not steal. We expect data
exfiltration to become more and more commonplace. Whether Pensacola’s
data was exfiltrated, I obviously can’t say."
“Broad targeted” attacks
Maze, Ryuk, and other ransomware attacks against government agencies
and companies have moved increasingly toward what Raytheon Cyber
Services Senior Manager Dylan Owen referred to as a "broad targeted"
attack—while they rely on spam for the initial breach, the attackers
"are poking around figuring out who they breached" before they launch
"They don't necessarily target a specific agency," Owen told Ars. "The
attackers have often either gotten a list of emails from another
source, or they "have programs that randomly try emails, or
combinations of username, first name/last name, middle initial, all
different kinds of combinations," he explained. "They might do a
little bit of research if they were going for a particular type of
organization, but usually they're very broad-based... then once they
get a beacon back saying, 'Hey, somebody clicked on my link', they go
and figure out who it was." And if the click came from a larger
organization rich in targets, Owen said, they go forward.
State and local agencies have been particularly vulnerable to these
sorts of attacks because of the economics of their IT operations.
"They're dependent on the funding through taxes or whatever, and that
money can only go so far," Owen noted. "They also have a preponderance
of older IT systems because of the lack of funding over the years. So
it's something that's built upon itself. A lot of them also have
proprietary software, so it's not commercial, off the shelf—they hired
somebody to create some special code, and that code may not run on
newer operating systems. So now they have older operating systems that
are harder to patch."
On top of that, many state and local agencies haven't done the work of
segregating those vulnerable systems and putting additional defenses
around them to reduce the risk posed by legacy systems, Owen
explained. But he said that's starting to change. "I know with
Louisiana particularly, the governor had said that cyber security is
going to be a really big focus for 2020," he said. "They put a lot of
money in it in 2019." And while Louisiana had to take the drastic step
of cutting off many services during the recent Ryuk attack, it was
effective in stopping the spread of the attack.
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