Daily Summary
Vidar activity surged today with 86 new samples detected, a 91% increase over the 7-day average of 45. This marks the highest single-day count in the observation period and signals an aggressive campaign push, likely tied to updated infrastructure and payload packaging.
New Samples Detected
The sample set today was dominated by .exe files (62 of 86), consistent with Vidar’s typical delivery as compiled executables. Of note, five anomalous file extensions appeared: .64556947, .76175449, .22207, .44729212, .17844, and .4916. These numeric extensions (one each) suggest either test iterations, randomized obfuscation, or targeted payload variations staggered to evade hash-based detection. The presence of four .zip and two .7z archives indicates compressed staging, possibly bundled with loader utilities.
7-Day Trend
Today’s 86 samples represent a 91% spike above the 7-day average, far exceeding the 25% threshold for notable deviation. This is Vidar’s highest volume day in the current tracking window, suggesting either a new distribution campaign launched or automated sample submission from a compromised pipeline.
C2 Infrastructure
Analysis yielded 100 new C2 servers and 186 total IOCs tied to today’s samples. The sheer volume of new C2 endpoints suggests either geographic spread across multiple hosting providers or rapid domain rotation to evade sinkholing. Historically, Vidar campaigns deploy C2 clusters in Eastern Europe and use HTTPS with self-signed certificates; this pattern likely persists here.
Security Analysis
The 1:1 ratio of new C2 servers to roughly half the sample set (100 servers vs 86 samples) is anomalous. Typical Vidar campaigns share C2 servers across multiple samples. This suggests a broker-style operation where each payload instance connects to a dedicated endpoint, possibly to limit blast radius if one server is seized. Defenders should prioritize network-level blocking of outbound connections to newly observed IPs and domains, while monitoring DNS query patterns for periodic callbacks on non-standard ports (e.g., 8080, 8443).