Glowworm
Glowworm is a China-linked threat actor referenced in the provided content as also being known as Earth Estries and FamousSparrow. The content associates Glowworm with the Zingdoor malware, an HTTP backdoor written in Go that can collect system information, transfer files, and execute arbitrary commands. Reporting cited in the content states that Zingdoor was deployed in intrusions against a telecom company in the Middle East and government departments in an African country following exploitation of the SharePoint ToolShell vulnerability (CVE-2025-53770), and that Zingdoor has previously been associated with Glowworm. The same reporting characterizes the broader activity as China-based and likely espionage-oriented, but stops short of definitive attribution of that 2025 campaign to Glowworm. The content also notes Trend Micro reporting on collaboration between China-aligned APT groups, specifically describing Earth Estries as one of the groups involved in "Premier Pass-as-a-Service" access brokering with Earth Naga.
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Targeting
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Who they target
Sectors the actor has been observed targeting.
- Software & Services
- Government & Administration
- Academia & Research
- Financial Services
Where they target
Geographies tied to known operations.
- 🇺🇸 United States
Where they're from
Attributed origin per open-source reporting.
- CN
Tradecraft
3 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
Associated malware families
2 malware families attributed to this actor across reporting.
Associated vulnerabilities
1 CVE this actor has used in observed campaigns. 1 of them exploited in the wild.
Observables
4 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
Recent activity
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
China-linked intrusion activity described compromising telecom and government entities by exploiting a SharePoint vulnerability and deploying the Zingdoor malware.
Previously associated with Zingdoor and later observed using ShadowPad in espionage-oriented intrusions. The current campaign shows tooling overlap with prior Glowworm activity, but the activity is not conclusively attributed to Glowworm.
The version that knows your environment.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.