Bee-ware: Vintage Malware Bumblebee Buzzes Back with Retro Tactics!

Beware: the Bumblebee malware is back with a retro twist—using old-school VBA macros! This not-so-savvy reincarnation targets US orgs with a “Voicemail February” ruse. Will it sting or just buzz off? #MalwareComeback

Hot Take:

Like a retro fashion trend nobody asked for, Bumblebee malware is back, baby! And it’s sporting vintage VBA macros, because who needs innovation when you can kick it old school and still manage to bug some systems?

Key Points:

  • Bumblebee malware, previously used by the notorious Conti group, has made a comeback with a new, yet antiquated, attack vector: VBA macros.
  • This malware was spotted sending “Voicemail February” themed emails from what seems to be a hijacked legitimate business domain.
  • Despite Microsoft’s efforts to block VBA macros by default, this campaign is attempting to use them, contrary to most modern attack methods.
  • The email contains a OneDrive link to a Word document with an embedded malicious macro that could download Bumblebee if macros weren’t blocked by default.
  • Proofpoint researchers believe that this isn’t the work of a sophisticated threat actor, but a sign of increased threat actor activity in 2024.

Need to know more?

Back with a Buzz of Nostalgia

Who knew malware could be nostalgic? The Bumblebee loader has been spotted again, and it's like that one-hit-wonder band from the '90s going on tour; except, instead of playing stadiums, it's attempting to play victims with the cyber equivalent of a cassette tape: VBA macros. Yes, those pesky little scripts that we thought we'd said goodbye to are the star of Bumblebee's latest show.

They've Got Mail!

Picture this: you're at work, and you get an email about a "Voicemail February" from an unknown sender. Curiosity piqued, you find it's from a seemingly legitimate domain, leading you to a OneDrive link with a very unrelated document. Surprise, it's malware! It's like getting Rickrolled, but instead of a catchy tune, you get a potential security breach. Now that's a twist no one's jamming to.

Retro Isn't Always Cool

It's been over a year since Microsoft put on its parental controls and blocked VBA macros by default, effectively grounding cyber delinquents. But it seems Bumblebee didn't get the memo and is trying to sneak out using the cyber equivalent of a fake ID. Most Bumblebee campaigns have moved on to fancier tactics, but this one's clinging to the good ol' days when macros were all the rage.

Spot the Not-so-Hot Plot

If you're keen on cybersecurity fashion, this campaign's outfit should stick out like socks with sandals. The mismatched email theme and the outdated attack method should be dead giveaways. It's like seeing someone wearing a fanny pack unironically - you can't help but think something's off. Proofpoint's advice? Train your users to spot these cyber faux pas and report them to the cybersecurity fashion police (aka your security team).

Don't Be Fooled by the Old-School

Even though Bumblebee's latest gig might not be hitting the high notes, this is just one act in what's shaping up to be a busy year for threat actors. Proofpoint's closing thoughts? Enjoy the quieter moments, because when it comes to cyber threats, there's no off-season. Keep your systems updated, macros disabled, and eyes peeled for the next malware tour dates. And remember, just because it's retro, doesn't mean it's classic.

Tags: Bumblebee loader, , malware trends, OneDrive malicious link, PowerShell Attacks, threat actor activity, VBA macros