Tortilla

Also known as: Tortilla

(Talos) Cisco Talos recently discovered a malicious campaign deploying variants of the Babuk ransomware predominantly affecting users in the U.S. with smaller number of infections in U.K., Germany, Ukraine, Finland, Brazil, Honduras and Thailand. The actor of the campaign is sometimes referred to as Tortilla, based on the payload file names used in the campaign. This is a new actor operating since July 2021. Prior to this ransomware, Tortilla has been experimenting with other payloads, such as the PowerShell-based netcat clone Powercat, which is known to provide attackers with unauthorized access to Windows machines. We assess with moderate confidence that the initial infection vector is exploitation of ProxyShell vulnerabilities in Microsoft Exchange Server through the deployment of China Chopper web shell.

🌍 Country ["[Unknown]"]

Introduction

(Talos) Cisco Talos recently discovered a malicious campaign deploying variants of the Babuk ransomware predominantly affecting users in the U.S. with smaller number of infections in U.K., Germany, Ukraine, Finland, Brazil, Honduras and Thailand. The actor of the campaign is sometimes referred to as Tortilla, based on the payload file names used in the campaign. This is a new actor operating since July 2021. Prior to this ransomware, Tortilla has been experimenting with other payloads, such as the PowerShell-based netcat clone Powercat, which is known to provide attackers with unauthorized access to Windows machines. We assess with moderate confidence that the initial infection vector is exploitation of ProxyShell vulnerabilities in Microsoft Exchange Server through the deployment of China Chopper web shell.

Activities and Tactics

Country of Origin: 🏳️ [“[Unknown]”]

Notable Campaigns

Information pending cataloguing.

Tactics, Techniques, and Procedures (TTPs)

Information pending cataloguing.

Notable Indicators of Compromise (IOCs)

No curated IOCs are currently published for this actor. This section will be updated when stable, attributable indicators are available.

Malware and Tools

  • Babuk Locker
  • China Chopper
  • Babuk Locker:
  • China Chopper:

Attribution and Evidence

Country of Origin: [“[Unknown]”] Additional attribution information pending cataloguing.

References

References pending cataloguing.