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Pulsar is an open-source .NET remote-access Trojan (RAT) targeting Windows systems. It has been used as a final-stage payload in multi-stage malware operations, including a malicious NPM supply-chain campaign that used a typosquatted package to initiate an obfuscated loader chain. That chain used Windows persistence mechanisms, a UAC-bypass attempt, antivirus discovery, AMSI bypasses, steganographically concealed payload components, and process hollowing before reflectively loading Pulsar. Pulsar has also been distributed in Brazilian financially themed campaigns attributed to the REF9334 operation, alongside malicious browser extensions and other RAT payloads. It is marketed by some crypter-as-a-service offerings as a .NET payload suitable for obfuscation and evasion.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
Their operations include installing malicious browser extensions and distributing PULSAR and REMCOS RAT.
7 distinct techniques documented for this family, organized by ATT&CK tactic.
26 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
IPs, domains, and DNS infrastructure linked to this family.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
Other indicator types observed in public reporting.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote-access trojan delivered in multiple earlier KREMLIN/REF9334 campaign branches, including through RC4-encoded DonutLoader shellcode injected into explorer.exe.
Remote access trojan referenced as a payload type supported by the crypter service for obfuscation/encryption.
An open-source Remote Access Trojan (RAT) delivered as the final payload in this NPM supply-chain attack; it is retrieved via steganographic PNGs and injected into a legitimate Windows process using process hollowing for stealth.
An open-source .NET Remote Access Trojan delivered via a multi-stage supply-chain attack chain (malicious NPM package -> batch/PowerShell loader -> steganographic PNG payloads -> encrypted .NET loader -> final RAT).
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.