An active malware campaign primarily targeting U.S. corporations with a new polymorphic variant of the Qbot banking trojan has been compromising thousands of victims around the world, researchers have reported.

The worm-like malware, whose original version is roughly a decade old, allows attackers to collect browsing activity and steal bank account credentials and other financial information. This is accomplished through a combination through a combination of techniques, including keylogging, credential and cookie exfiltration, and hooking.

Despite the campaign's focus on the U.S., victims have been observed as far as Europe, Asia and South America, according to a blog post today from Varonis.

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