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Vobfus is a Windows malware family commonly classified as a worm and closely associated in vendor naming with VBObfus, Changeup, Pronny, and Jorik labels. It has been widely detected in Win32 executable samples and is known in the ecosystem as malware that can function as a downloader, with some observed samples linked to delivery or invocation of Kraken botnet payloads. The family has historically been identified through antivirus detections such as Worm:Win32/Vobfus and related aliases, reflecting overlap in industry nomenclature rather than a cleanly separated taxonomy.
High-confidence reporting supports Vobfus as Windows malware used for malicious code execution and follow-on payload delivery. The available evidence indicates downloader behavior in at least some samples, but does not establish a specific threat actor, victim sector, or exclusive campaign attribution. The family is therefore best characterized as commodity Windows malware in the Vobfus/Changeup/Pronny/Jorik cluster, with worm-like propagation reflected in longstanding detection names and downloader capability reflected in multiple sample classifications.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
6 distinct techniques documented for this family, organized by ATT&CK tactic.
48 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Mentioned as one of many malware families observed using .bit domains for C2 infrastructure.
A Win32 malware family commonly detected as a worm/trojan, associated in this reference with obfuscated VB-based samples and autorun/propagation behavior based on vendor naming such as Vobfus, VBObfus, Pronny, and Changeup.
Downloader/worm samples that appear to carry or drop the Kraken payload; mentioned as a delivery vehicle rather than the main subject.
Win32/Vobfus [[URL_b3187638_391]] 2010 年 9 月 (3.11)
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.