IBM X-Force researchers report an increase in HawkEye v9 keylogger infection campaigns targeting businesses around the world. In campaigns observed by X-Force in April and May 2019, the HawkEye malware focused on targeting business users, aiming to infect them with an advanced keylogging malware that can also download additional malware to their devices. The industries targeted in April 2019 campaigns observed by X-Force included transportation and logistics, healthcare, import and export, marketing, agriculture, and others.
HawkEye is designed to steal information from infected devices, but it can also be used as a loader, leveraging its botnets to fetch other malware into the device as a service for third-party cybercrime actors. Botnet monetization of this sort is rather common nowadays, with various gangs collaborating with one another to maximize their potential profits.
Reborn … Yet Again
HawkEye has been around for the past six years. It is a commercial offering peddled in the dark web by a development and support crew that continually improves its code, adds modules and supplements it with stealth capabilities. In 2018, after a lull in activity in 2017, HawkEye was back with a new version and name: Hawkeye Reborn v8.
But while HawkEye started out with one “owner” in its earlier years, it was eventually sold off in December 2018 to a new owner, an actor going by the online alias CerebroTech. The latter changed the version number to HawkEye Reborn v9.0, updated the terms of service for the sale of the malware, and presently distributes it on the dark web and through resellers. CerebroTech appears to be releasing frequent fixes to the malware as part of serving dubious buyers in the darker enclaves of the web.
The Target: Business Users
Having analyzed malspam messages distributing HawkEye, X-Force researchers can note that the operators behind the campaign are targeting business users. In the cybercrime arena, most financially motivated threat actors are focused on businesses because that is where they can make larger profits than attacks on individual users. Businesses have more data, many users on the same network and larger bank accounts that criminals prey on. X-Force is not surprised to see HawkEye operators follow the trend that’s become somewhat of a cybercrime norm.
To gain the trust of potential new victims, malspam messages came disguised as an email from a large bank in Spain, but other messages carrying HawkEye infections came in various formats, including fake emails from legitimate companies or from other banks.
X-Force researchers note that the infection process is based on a number of executable files that leverage malicious PowerShell scripts. The following image is a schematic view of that flow.
A technical description of the infection routine with relevant indicators of compromise (IoCs) can be accessed on X-Force Exchange.
The IP addresses originating the malspam came from Estonia, while users were targeted in countries around the globe. For HawkEye, which can be operated by any number of actors because it is a commercial offering, these details change in every campaign. That being said, a few campaigns X-Force analyzed in April and May 2019 show that the infrastructure the malspam came from is hosted on similar assets. It is possible that HawkEye operators further pay for other services from the malware’s vendor, or from another cybercrime vendor serving up spamming campaigns.
Keeping Up With Malspam Campaigns
Malware infection campaigns are a daily occurrence in the cybercrime arena, and defenders know they are bound to run into more of them than they can possibly count. Why keep up with campaigns at all?
Threat intelligence on phishing and malware campaigns can help bolster the organization’s first lines of defense by helping security teams:
- Block malicious and suspicious IPs from interacting with their users.
- Expect and warn about trending attacks and educate both management and users on new formats and ploys.
- Become aware of new attack tactics, techniques and procedures (TTPs) to better assess business risk relevant to the organization as cybercriminals evolve their arsenals.
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Author: Limor Kessem