Disclosure context

About Cryptbb

Cryptbb is a relatively obscure ransomware group that emerged in September 2023, appearing to be financially motivated based on their operational patterns. Little is publicly documented about their origin or potential affiliations, though their limited scale of operations with only 8 known victims suggests they operate as a smaller independent group rather than a sophisticated ransomware-as-a-service operation. Their attack methodology and specific technical capabilities remain largely undocumented in public threat intelligence reporting, with no detailed analysis available from major security firms regarding their initial access vectors, encryption methods, or whether they employ data exfiltration tactics. The group has demonstrated a geographic focus primarily targeting victims across the United States, United Kingdom, India, and Poland, though no specific high-profile campaigns or notable incidents have been publicly reported by law enforcement or security researchers. Given the limited public reporting and recent emergence, Cryptbb appears to remain a low-profile threat actor with current activity status unclear due to insufficient public documentation. The group has been linked to 8 public disclosures across our corpus. First observed on a leak site on September 15, 2023. The operation is currently inactive.

Timeline of this disclosure

September 15, 2023CON-STRUCT listed by Cryptbbon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 415 disclosures indexed across all operators we track. Geographically, CON-STRUCT is reported in United States, a country with 7,392 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

← All victims

Con-Struct, Inc.

listed as CON-STRUCT · Claimed by Cryptbb · listed 3 years ago

32m

Age

since listed · data leaked

Status timeline

Listed
Sep 15, 2023
Data leaked

At a glance

Group: Cryptbb
Status: Data leaked
Country: United States
Sector: Construction
Listed on leak site: Sep 15, 2023

About the victim

AI dossier — public-source company profile

Con-Struct, Inc. is a heavy construction contractor based in Central Iowa, operating for over 50 years since its founding in 1971. The company provides municipal, commercial, residential, and agricultural excavation and concrete services across Story County, Marshall County, and surrounding areas. Originally a family-owned business, it has grown into one of the top excavation and concrete companies in Central Iowa.

Industry: Heavy Construction & Excavation
Address: 305 S. Dayton Ave., Ames, Iowa; 1710 E. Main St., Marshalltown, Iowa
Founded: 1971

Attack summary

Severity: medium — Data has been published by the group, indicating confirmed exfiltration, but no details on the volume, type, or sensitivity of the data have been provided; the victim is a regional construction firm with no indication of regulated or highly sensitive data at scale.

The Cryptbb ransomware group claims to have attacked Con-Struct, Inc. and has published data (disclosed status: data_published), though no specific data size, ransom demand, or detailed description of exfiltrated content was stated in the post.

medium

What the group claims

Con-struct, Inc. proudly serves all heavy construction needs in Central Iowa, including Ames, Story County, Marshall County, and surrounding areas.https://constructiowa.com

Sources

Victim siteconstructiowa.com
Leak posthttp://basemmnnqwxevlymli5bs36o5ynti55xojzvn246spahniugwkff2pad.onion/company/7890160

Source

Indexed 3 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.