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Storm-1811, also known as Curly Spider, is a financially motivated cybercrime threat actor active since at least 2022. Microsoft and other security researchers associate the group with ransomware operations, particularly deployment of Black Basta, and with intrusion activity using social engineering, remote-access tools, and post-compromise tradecraft. Storm-1811 commonly initiates access by email bombing targets and then impersonating help desk or IT-support personnel through telephone calls or Microsoft Teams. The operators persuade victims to authorize Microsoft Quick Assist or install legitimate remote-management tools such as AnyDesk or TeamViewer, providing interactive access to victim systems. Observed activity can progress to credential harvesting, reconnaissance, lateral movement, establishment of remote-access backdoors including SSH tunnels, and ransomware deployment. Storm-1811 has also used DLL side-loading to execute Cobalt Strike. Similar Teams- and vishing-based ransomware activity has been linked to emerging cluster UNC6692, while STAC5777 has been assessed as overlapping with Storm-1811 tradecraft. The actor’s operations rely heavily on trusted remote-support software and impersonation to evade conventional malware-focused controls.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Geographies tied to known operations.
40 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
13 malware families attributed to this actor across reporting.
8 additional families tracked in Mallory.
2 CVEs this actor has used in observed campaigns. 2 of them exploited in the wild.
This detection identifies instances where Windows Explorer.exe spawns PowerShell or cmd.exe processes, particularly focusing on executions initiated by LNK files. This behavior is associated with the ZDI-CAN-25373 Windows shortcut zero-day vulnerability, where specially crafted LNK files are used to trigger malicious code execution through cmd.exe or powershell.exe. This technique has been actively exploited by multiple APT groups in targeted attacks through both HTTP and SMB delivery methods.
The Cardinal cybercrime group (aka Storm-1811, UNC4393), which operates the Black Basta ransomware, may have been exploiting a recently patched Windows privilege escalation vulnerability as a zero-day. The vulnerability (CVE-2024-26169) occurs in the Windows Error Reporting Service. If exploited on affected systems, it can permit an attacker to elevate their privileges.
69 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Referenced only as an annotated actor associated with the detection technique.
Listed in the detection annotation metadata.
Referenced solely as an ATT&CK-associated group for Windows built-in account renaming/local-account abuse; no campaign or activity is described.
Listed only as an annotation associated with the detection.
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.