Microsoft Warns of Stealthy Password Attacks

The threat actor “Midnight Blizzard” is engaging in increasing credential attack activity.

They conceal the origin of their assaults by employing residential proxy services.

These attacks target governments, IT service providers, NGOs, the defense sector, and vital manufacturing.

Numerous password spray, brute force, and token theft tactics are used in these credential assaults.

Employing Low-Reputation IP Addresses & Proxy Services

Midnight Blizzard (NOBELIUM) has also carried out session replay assaults using stolen sessions, most likely obtained through illegal selling to get initial access to cloud resources.

Threat actors’ connections made with compromised credentials can be obscured by utilizing low-reputation IP addresses, such as those provided by residential proxy providers.

Microsoft Threat Intelligence reported that “the threat actor likely used these IP addresses for very short periods, which could make scoping and remediation challenging.”

Microsoft noted in a series of tweets that, making issues even more difficult, the threat actor only uses these IP addresses occasionally, creating substantial obstacles for effective scoping and remediation operations.

It is important to note that the same organization, known as Midnight Blizzard or NOBELIUM, was responsible for the disastrous SolarWinds breach in late 2021.

Microsoft has strengthened its defenses to combat this growing danger. To defend against these attacks, Microsoft Defender Antivirus, Defender for Endpoint, Defender for Cloud Apps, and Azure Active Directory have all been given strong security features and improved detection capabilities.

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