Cyber Resilience

Threat actor · all actors

Storm-1811G1046 unknown

aka Storm-1811, UNC4393, CURLY SPIDER, STAC5777, Cardinal

Last updated: 2026-08-20

0attributed CVEs
47ATT&CK techniques
0.0IDF score (tooling uniqueness)
0exclusive CVEs
—years active

About this actor

[Storm-1811](https://attack.mitre.org/groups/G1046) is a financially-motivated entity linked to [Black Basta](https://attack.mitre.org/software/S1070) ransomware deployment. [Storm-1811](https://attack.mitre.org/groups/G1046) is notable for unique phishing and social engineering mechanisms for initial access, such as overloading victim email inboxes with non-malicious spam to prompt a fake "help desk" interaction leading to the deployment of adversary tools and capabilities.(Citation: Microsoft Storm-1811 2024)(Citation: rapid7-email-bombing)(Citation: RedCanary Storm-1811 2024)(Citation: RedCanary June Insights 2024)

Source: MITRE ATT&CK

Names & naming systems

Each vendor coins its own name for the same actor. Where a name follows a known scheme we attribute it; the rest are listed honestly as unclassified.

MITRE ATT&CKG-number catalogue id

G1046

Microsoftweather-system names

Storm-1811

CrowdStrikenation-animal names

CURLY SPIDER

MandiantUNC uncategorised cluster

UNC4393

Unclassifiedno scheme matched

STAC5777Cardinal

How we know this

Data origin
MITRE ATT&CK Imported from the MITRE ATT&CK STIX bundle as an intrusion-set object.
Techniques
MITRE ATT&CK STIX mappings — 47 ATT&CK techniques on file.
Named victims
None on file.

See how actor data is built for the full pipeline.

Activity timeline

No activity events recorded.

Profile

CVERiskCVSSEPSSPublishedProducts
No attributed CVEs.

Mitigating controls (NIST 800-53)

ControlTechniques coveredCoverage
SI-427 / 4757%
CM-626 / 4755%
CM-222 / 4747%
SI-320 / 4743%
AC-318 / 4738%
CM-718 / 4738%
CA-717 / 4736%
AC-216 / 4734%
AC-615 / 4732%
SI-1014 / 4730%
SI-714 / 4730%
AC-413 / 4728%
SC-712 / 4726%
IA-29 / 4719%
AC-58 / 4717%

Co-occurring actors

None.

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