Severity
High
Analysis Summary
Vidar, which first appeared in late 2018, is a malware family that primarily acts as an information stealer and is frequently seen as a prelude to ransomware distribution. This malware takes data and distributes it as spam email, cracked commercial software, and keygen programs. Vidar can scrape a wide range of digital wallets in addition to credit card data and passwords. Various campaigns can be used to propagate this malware. It allows data such as system information, browser data, and passwords to be captured and exfiltrated from a system. Vidar has also been seen as a secondary payload in ransomware attacks like STOP/DJVU.
Researchers discovered newly registered domains created by a threat actor to spoof Microsoft's official Windows 11 OS download portal in April 2022. The fake sites were set up to spread malicious ISO files that infect endpoints with the Vidar infostealer. These Vidar malware variants fetch their C2 configuration via attacker-controlled Telegram and Mastodon social media channels.
Impact
- Data Exfiltration
- Information Theft
- Exposure of Sensitive Data
Indicators of Compromise
MD5
cc2add7d205a525829016f55eaa34706
57bb37011e7ce27e895667aa7c61d259
9a6e48b81470b6672dad539f00542fc0
95f2a94868d64bf288b7748b83f0ffd0
ceeacf23118fcff68dbfe7a803564f92
SHA-256
72c6324d2e150db05c0749a90dd9581ef096f55f38f7ee6bfdaf2275cae07db8
2f73ffa46e3cc8bf8a70720a0e6fc8b036d2964a336b152839c53cd673e4b56c
bd8f110fe735407ee172169f4bf728e8499e0ee54a62315eac82d34ee3d81e24
6bfd136df13c152a78525a3c7738bebda43ba2558c124613845c14e891945625
63cd5cc0fc20c1d19f7639e4016b77da438dcd4d1b2e94145a496fda70d2ed1c
SHA1
1b41384eeda912ed7c55ca5ecd736a7ffb6ac6f1
61ebe4ad93e96ada7cc440614f365d65212d8fcc
8c008cbf6bd4b25feae62a13ee9573f11276d462
f0fdf608077a35108b9dbe80c53ec109023b46f2
b79b58ae3bed194eceb76cf697047849a8c7b62f
Remediation
- Block all threat indicators at your respective controls.
- Search for indicators of compromise (IOCs) in your environment utilizing your respective security controls.
- Ensure that general security policies are employed including implementing strong passwords, correct configurations, and proper administration security policies.
- Limit access to administrative accounts and portals to only relevant personnel and make sure they are not publicly accessible.
- Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
- Enable antivirus and anti-malware software and update signature definitions on time. Using multi-layered protection is necessary to secure vulnerable assets.