- Published
- Source
- The Hacker News
- Filed under
- Malware & exploits
The Russia-aligned threat actor known as UAC-0099 has been attributed to a previously undocumented .NET infostealer and remote access trojan (RAT) codenamed ASHVEIN. According to TrendAI, the malware has been put to use in attacks targeting Ukrainian government personnel. The cybersecurity company is tracking the cluster under the name Earth Sirrush (previously SHADOW-EARTH-065). ASHVEIN,…
Keeping malware out
- Keep operating systems, browsers and plugins patched – most malware arrives through known holes.
- Block macros and scripts from the internet, and let only approved software run where you can.
- Watch endpoint alerts for new persistence: scheduled tasks, services and run keys.
More helpNCSC: mitigating malware and ransomware attacks (opens in a new tab)
Defender’s notebook
The attacker technique behind this story, in MITRE’s terms – and what to check in your own estate.
Application Layer Protocol
Command and ControlWhat a defender checks
- Hunt for beaconing: regular connections to rare domains.
- Check DNS logs for newly registered and look-alike domains.
- Block known C2 infrastructure from your threat intelligence.
Build the skillBlue Team Engineer · Network Security Engineering
Credentials from Password Stores
Credential AccessWhat a defender checks
- Find the infected machines and reset every password saved on them.
- Revoke sessions too – stolen cookies can get past MFA.
- Stop work passwords being saved in personal browsers.
Build the skillBlue Team Analyst · Endpoint Monitoring
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MyCyberWay training
Blue Team Analyst · Vulnerability Management
You can't patch everything at once. Learn what to fix first.
In our Blue Team Analyst programme you run a vulnerability scan, prioritise the output with CVSS, EPSS and asset criticality, and track remediation to closure with the teams who own the fix.
- Read scanner output properly
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- Track remediation to closure
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