Adversaries may target an Exchange server, Office 365, or Google Workspace to collect sensitive information. Adversaries may leverage a user's credentials and interact directly with the Exchange server to acquire information from within a network. Adversaries may also access externally facing Exchange services, Office 365, or Google Workspace to access email using credentials or access tokens. Tools such as MailSniper can be used to automate searches for specific keywords.1
- Cybersecurity Advisory GRU Brute Force Campaign July 2021
Groups using this technique
| Group | Name | Country |
|---|---|---|
| grp_g0085 | FIN4 | — |
| grp_g0004 | Ke3chang | — |
| grp_g0077 | Leafminer | Iran |
| grp_g0114 | Chimera | China |
| grp_g0035 | Dragonfly | Russia |
| grp_g0006 | APT1 | China |
| grp_g1055 | VOID MANTICORE | — |
| grp_g1033 | Star Blizzard | — |
| grp_g0125 | HAFNIUM | — |
| grp_g0094 | Kimsuky | DPRK |
| grp_g0059 | Magic Hound | Iran |
| grp_g0007 | APT28 | Russia |
| grp_g0016 | APT29 | Russia |
Claims
No public claim points at this technique yet.
Auto-ingested and not human-reviewed; confidence and validity read by citation.