Hackers target SMEs using bug in popular billing software

Maria J. Danford

An as-nonetheless-unidentified threat actor has been noticed exploiting a vulnerability in time and billing technique BillQuick to deploy ransomware.

Cybersecurity sleuths at Huntress ended up triggered by a malicious incident at a US engineering organization managed by just one of its companions. Investigating the incident, the scientists identified a SQL injection vulnerability in BillQuick World-wide-web Suite 2020.

“Our staff was equipped to properly recreate this SQL injection-primarily based attack and can affirm that hackers can use this to accessibility customers’ BillQuick knowledge and operate malicious instructions on their on-premises Windows servers,” shared Caleb Stewart, security researcher at Huntress.

Stewart suggests the incident was regarding due to the fact BQE, the organization that develops BillQuick, claims to have a consumer base of more than 400,000 installations all over the environment.

Securing SMB software package

According to the researcher’s analysis, the SQL injection vulnerability, tracked as CVE-2021-42258, can be triggered without the need of substantially exertion by means of login requests with invalid figures, a solitary estimate, in the username field.

Huntress notes that the attackers ended up equipped to exploit this vulnerability to execute instructions on the victim’s equipment remotely to deploy an unidentified pressure of ransomware.

“The actor we noticed did not align with any regarded/large threat actor of which we are aware. It really is my particular feeling this was a more compact actor and/or group primarily based on their habits all through exploitation and publish-exploitation,” Stewart informed BleepingComputer.

The fantastic news is that the vulnerability was patched previously this thirty day period right after Huntress notified BQE of the bug. Worryingly having said that, Stewart suggests that digging into BillQuick also introduced eight other vulnerabilities, which are even now in the course of action of staying patched.

Whilst BQE has been extremely constructive in its engagements with Huntress, Stewart believes the incident goes to demonstrate the significance of securing software package applied by compact and medium corporations (SMBs).

“This incident highlights a repeating pattern plaguing SMB software package: perfectly-founded vendors are undertaking extremely minor to proactively protected their programs and topic their unwitting buyers to important liability when sensitive knowledge is inevitably leaked and/or ransomed,” concludes Stewart.

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