Threat Signal Report
Another Wiper Malware Targeted Enterprises in Ukraine #DoubleZero
FortiGuard Labs is aware that enterprises in Ukraine were targeted by another wiper malware. Dubbed "DoubleZero," the malware was distributed in a zip archive and destroys the compromised machine by overwriting files and deleting registry keys.
Why is this Significant?
This is significant because DoubleZero is the latest wiper malware used in the current Russia-Ukraine war and aims to destroy machines belonging to enterprises in Ukraine.
FortiGuard Labs previous published multiple Threat Signals on other wiper malware that targeted Ukraine. See the Appendix for links to "Additional Wiper Malware Deployed in Ukraine #CaddyWiper," "New Wiper Malware Discovered Targeting Ukrainian Interests" and "Wiper Malware Hit Ukrainian Organizations."
How Widespread is the Malware?
At this time, there is no report that DoubleZero affected organizations outside of Ukraine.
How does DoubleZero Work?
DoubleZero was distributed in several ZIP archives, one of which is called "Virus ... extremely dangerous !!!. Zip." Once DoubleZero runs, it overwrites or uses API calls to zero out non-system files system files before moving on to overwrite critical system files and registry keys.
What is the Status of Coverage?
FortiGuard Labs provides the following AV coverage against the files involved in the attack:
Wiper malware hit Ukrainian organizations (Fortinet)
Traffic Light Protocol
|Color||When Should it Be used?||How may it be shared?|
TLP: REDNot for disclosure, restricted to participants only.
|Sources may use TLP:RED when information cannot be effectively acted upon by additional parties, and could lead to impacts on a party's privacy, reputation, or operations if misused.||Recipients may not share TLP:RED information with any parties outside of the specific exchange, meeting, or conversation in which it was originally disclosed. In the context of a meeting, for example, TLP:RED information is limited to those present at the meeting. In most circumstances, TLP:RED should be exchanged verbally or in person.|
TLP: AMBERLimited disclosure, restricted to participants’ organizations.
|Sources may use TLP:AMBER when information requires support to be effectively acted upon, yet carries risks to privacy, reputation, or operations if shared outside of the organizations involved.||Recipients may only share TLP:AMBER information with members of their own organization, and with clients or customers who need to know the information to protect themselves or prevent further harm. Sources are at liberty to specify additional intended limits of the sharing: these must be adhered to.|
TLP: GREENLimited disclosure, restricted to the community.
|Sources may use TLP:GREEN when information is useful for the awareness of all participating organizations as well as with peers within the broader community or sector.||Recipients may share TLP:GREEN information with peers and partner organizations within their sector or community, but not via publicly accessible channels. Information in this category can be circulated widely within a particular community. TLP:GREEN information may not be released outside of the community.|
TLP: WHITEDisclosure is not limited.
|Sources may use TLP:WHITE when information carries minimal or no foreseeable risk of misuse, in accordance with applicable rules and procedures for public release.||Subject to standard copyright rules, TLP:WHITE information may be distributed without restriction.|