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Mustard Tempest, also tracked as DEV-0206, TA569, GOLD PRELUDE, and UNC1543, is a financially motivated cybercriminal initial-access broker associated with the SocGholish malware framework, also known as FakeUpdates. First reported in 2017, SocGholish has become a significant initial-access vector for corporate intrusions, providing footholds that other criminal operators use to deploy additional malware and prepare ransomware attacks. The operation primarily distributes malicious JavaScript through fake browser-update prompts on compromised legitimate websites, including WordPress sites. Delivery also involves malvertising, traffic-distribution systems, and spam messages linking to compromised websites. Its lures impersonate widely used browsers and often deliver archived JavaScript payloads. Initial execution profiles the host, identifies domain membership, inventories security products, and enumerates users, processes, services, privileged accounts, and Active Directory trust relationships. SocGholish intrusion chains have delivered Cobalt Strike, BLISTER, and NetSupport RAT. Operators adopted MintsLoader as an alternative delivery chain around July 2024. Observed activity includes browser credential extraction, NTLM-hash theft using Internal Monologue, scheduled-task and startup persistence, DLL sideloading, process injection, obfuscated scripts, and execution through renamed legitimate Windows binaries. Mustard Tempest has supplied access used by Evil Corp, and its FakeUpdates payloads have also been deployed on systems already infected with Raspberry Robin. These relationships illustrate an access-broker ecosystem rather than a single unified operation. Ransomware preparation and deployment can occur after access passes to downstream operators; association with such intrusion chains does not establish that Mustard Tempest itself operates the ransomware.
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.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
40 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
27 malware families attributed to this actor across reporting.
22 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.
CVE-2026-41940, the cPanel authentication bypass, illustrates the opportunistic mass-exploitation pattern most clearly. What began as exploratory probing evolved into a multi-actor campaign combining ransomware deployment, website defacement, and — in at least one documented case — targeted cyber-espionage.
481 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.
Listed in the detection annotation metadata.
Listed only as an annotation associated with the detection.
Listed only in the detection's ATT&CK/actor annotations.
Named cybercriminal actor/framework referenced as both a prior website-compromising actor and a downstream recipient of traffic redirected by Shady Squirrel.
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.