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SUMMARY

(Updated April 28, 2022) This advisory has been updated to include additional Indicators of Compromise (IOCs) for WhisperGate and technical details for HermeticWiper, IsaacWiper, HermeticWizard, and CaddyWiper destructive malware, all of which have been deployed against Ukraine since January 2022. Additional IOCs associated with WhisperGate are in the Appendix, and specific malware analysis reports (MAR) are hyperlinked below.

• Refer to for technical details on HermeticWiper.
• Refer to for technical details on IsaacWiper and HermeticWizard
• Refer to for technical details on CaddyWiper.

(end of update)

Leading up to Russia’s , threat actors deployed destructive malware against organizations in Ukraine to destroy computer systems and render them inoperable.

• On January 15, 2022, the Microsoft Threat Intelligence Center (MSTIC) disclosed that malware, known as WhisperGate, was being used to target organizations in Ukraine. According to Microsoft, WhisperGate is intended to be destructive and is designed to render targeted devices inoperable.
• On February 23, 2022, several cybersecurity researchers disclosed that malware known as was being used against organizations in Ukraine. According to , the malware targets Windows devices, manipulating the master boot record, which results in subsequent boot failure.

Destructive malware can present a direct threat to an organization’s daily operations, impacting the availability of critical assets and data. Further disruptive cyberattacks against organizations in Ukraine are likely to occur and may unintentionally spill over to organizations in other countries. Organizations should increase vigilance and evaluate their capabilities encompassing planning, preparation, detection, and response for such an event.

This joint Cybersecurity Advisory (CSA) between the Cybersecurity and Infrastructure Security Agency (CISA) and Federal Bureau of Investigation (FBI) provides information on WhisperGate and HermeticWiper malware as well as open-source indicators of compromise (IOCs) for organizations to detect and prevent the malware. Additionally, this joint CSA provides recommended guidance and considerations for organizations to address as part of network architecture, security baseline, continuous monitoring, and incident response practices.

TECHNICAL DETAILS

Threat actors have deployed destructive malware, including both WhisperGate and HermeticWiper, against organizations in Ukraine to destroy computer systems and render them inoperable. Listed below are high-level summaries of campaigns employing the malware. CISA recommends organizations review the resources listed below for more in-depth analysis and see the Mitigation section for best practices on handling destructive malware. 

On January 15, 2022, Microsoft announced the identification of a sophisticated malware operation targeting multiple organizations in Ukraine. The malware, known as WhisperGate, has two stages that corrupts a system’s master boot record, displays a fake ransomware note, and encrypts files based on certain file extensions. Note: although a ransomware message is displayed during the attack, Microsoft highlighted that the targeted data is destroyed, and is not recoverable even if a ransom is paid. See Microsoft’s blog on for more information and see the IOCs in table 1.

On February 23, 2022, cybersecurity researchers disclosed that malware known as HermeticWiper was being used against organizations in Ukraine. According to Sentinel Labs, the malware targets Windows devices, manipulating the master boot record and resulting in subsequent boot failure. Note: according to Broadcom, “[HermeticWiper] has some similarities to the earlier WhisperGate wiper attacks against Ukraine, where the wiper was disguised as ransomware.” See the following resources for more information and see the IOCs in table 2 below.

• ESET Research Tweet: .
• Sentinel Labs:
• Broadcom’s Symantec Threat Hunter Team:

Table 2: IOCs associated with HermeticWiper

View the detailed report below.