Disclosure context

About Siegedsec

SiegedSec is a relatively new threat actor that emerged in December 2023, primarily motivated by hacktivism with a strong focus on anti-Israeli sentiment rather than traditional financial gain through ransomware operations. The group appears to operate independently with suspected ideological motivations tied to pro-Palestinian activism, though their exact geographic origin remains unclear based on publicly available intelligence. Unlike traditional ransomware groups, SiegedSec appears to focus on data theft and public exposure of sensitive information rather than encryption-based extortion, primarily targeting Israeli government entities through opportunistic attacks that exploit web application vulnerabilities and exposed credentials. The group has maintained a relatively low profile with 19 documented victims, almost exclusively targeting Israeli government infrastructure in what appears to be coordinated ideological attacks rather than broad financial campaigns. Based on available reporting, SiegedSec remains active as of late 2023 and early 2024, continuing their focused campaign against Israeli targets through data exfiltration and public disclosure operations. The group has been linked to 19 public disclosures across our corpus. First observed on a leak site on December 8, 2023; most recent post December 9, 2023. The operation is currently inactive.

Timeline of this disclosure

December 8, 2023Atlassian listed by Siegedsecon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,524 disclosures indexed across all operators we track. Geographically, Atlassian is reported in Australia, a country with 368 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

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Atlassian

Claimed by Siegedsec · listed 2 years ago

29m

Age

since listed · data leaked

Status timeline

Listed
Dec 8, 2023
Data leaked

At a glance

Group: Siegedsec
Status: Data leaked
Country: Australia
Sector: Technology
Listed on leak site: Dec 8, 2023

About the victim

AI dossier — public-source company profile

Atlassian is an Australian enterprise software company headquartered in Sydney that develops collaboration and productivity tools for software, IT, and business teams. Its flagship products include Jira, Confluence, Trello, and Bitbucket, used by millions of teams worldwide. The company serves a broad range of industries and operates at global scale with tens of thousands of employees.

Industry: Collaboration & Enterprise Software
Address: 341 George Street, Sydney, NSW 2000, Australia
Employees: 10000+
Founded: 2002

Attack summary

Severity: high — Data has been published by the threat actor against a major global enterprise software vendor; exfiltrated data likely includes employee or customer PII and internal business data. While the post is sparse, the disclosed status of data_published at a company of Atlassian's scale and sensitivity warrants a high rating.

SiegedSec claims to have exfiltrated data from Atlassian, with the leak post referencing information related to software developers, project managers, and IT service management personnel or data. The disclosure status is marked as data_published, indicating data was released publicly with no ransom demand stated.

high

Data the group says was taken

AI dossier — extracted from the leak post

Software developer records
Project manager records
IT service management data
Employee or user data

What the group claims

software developers, project managers, it service management

Sources

Victim siteatlassian.com
Leak posthttp://nv5p2mmpctvyqdyyi5zwh4gnifq2uxdx4etvnmaheqlrw6ordrjwxryd.onion/post/5.html

Source

Indexed 2 years ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.