Impersonation attacks in cloud environments: what IAM teams missed

TL;DR: Ticketmaster’s reported breach and the wider Snowflake account-hijacking pattern show how stolen credentials, missing MFA, and token abuse can expose very large datasets, according to Unosecur. The real lesson is that static access controls and weak identity governance leave cloud databases vulnerable even when the platform itself is not compromised.

NHIMG editorial — based on content published by Unosecur: From Snowflake to Avalanche, Battling the Growing Threat of Impersonation Attacks

By the numbers:

• Ticketmaster has confirmed that sensitive information for approximately 560 million users was compromised.
• When AWS credentials are exposed publicly, attackers attempt access within an average of 17 minutes.

Questions worth separating out

Q: What breaks when stolen cloud credentials are allowed to authenticate without strong MFA?

A: A stolen credential becomes a working identity, which means the attacker does not need to defeat the platform itself.

Q: Why do cloud impersonation attacks create such a large blast radius?

A: Because the attacker inherits the permissions already attached to the account or token.

Q: How do security teams know whether a cloud identity is operating outside its intended boundary?

A: Look for mismatches between expected and observed behaviour, especially unusual session duration, abnormal download volume, and access from locations or times that do not match the account’s normal pattern.

Practitioner guidance

• Enforce phishing-resistant MFA on cloud access paths Require strong authentication for all accounts that can reach cloud databases, especially third-party and administrative identities.
• Audit token issuance and replay pathways Review which identities can generate authentication tokens, how long those tokens live, and whether they can be reused outside the original session context.
• Reduce standing privilege on cloud identities Map every identity with access to sensitive data stores and remove broad read, export, or admin entitlements that are not explicitly required.

What's in the full article

Unosecur's full blog covers the operational detail this post intentionally leaves for the source:

• Step-by-step analysis of the Snowflake-linked attack path and how the stolen access was used.
• Specific examples of how impersonation attacks bypass static security policies in cloud environments.
• The article’s own FAQ guidance on MFA, lateral movement, and cloud detection tactics.
• Unosecur’s recommended cloud security posture changes for teams dealing with account compromise.

👉 Read Unosecur's analysis of the Snowflake-linked impersonation attack pattern →

Impersonation attacks in cloud environments: what IAM teams missed?

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