The Russian-based group behind the SolarWinds hack has launched a new campaign that appears to target government agencies, think tanks, and non-governmental organizations, Microsoft said Thursday.

Nobelium launched the current attacks after getting access to an email marketing service used by the United States Agency for International Development, or USAID, according to Microsoft.

"These attacks appear to be a continuation of multiple efforts by Nobelium to target government agencies involved in foreign policy as part of intelligence gathering efforts," Tom Burt, Microsoft vice president of customer security and trust, wrote in a blog post.

The campaign, which Microsoft called an active incident, targeted 3,000 email accounts across 150 organizations, mostly in the United States, Burt said. But the targets are in at least 24 countries. At least a quarter of the targeted organizations are said to be involved in things like international development and human rights work.