FajarPaper was hacked The most dangerous company to cooperate with in Indonesia may pose a Listed by alphv Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On 21 May 2023, PT Fajar Surya Wisesa Tbk, known commercially as FajarPaper, was listed by the alphv ransomware group as a victim of a cyber attack in which internal files were claimed to have been exfiltrated. The number of people whose information may be involved remains unknown, and public detail on the precise contents is limited.

For employees, partners, suppliers and others who deal with a major Indonesian packaging manufacturer, the practical stakes are straightforward: internal corporate files can contain personal contact details, contractual information, financial records and operational data that, if misused, create lasting inconvenience and risk. What is confirmed so far is the listing itself and the claim of file theft; everything else requires caution until more is verified.

Breaking down the breach

According to the available record, the incident was reported on 21 May 2023. The alphv ransomware group listed FajarPaper and asserted that internal files had been exfiltrated in a ransomware attack. No public figure has been given for the volume of data, the number of affected individuals, or the exact date the intrusion began. The method of initial access, the duration of any dwell time inside the network, and whether a ransom demand was paid or systems were encrypted are all undisclosed.

The headline associated with the listing described FajarPaper as having been hacked and framed the company in strongly negative terms; that language originates with the threat actors’ claim and should be treated as such. Independent confirmation of the full scope has not been supplied in the facts available here. In short, the public picture is that a well-known ransomware group publicly claimed responsibility for stealing internal files from the company, while scale, timing specifics and technical details remain unconfirmed.

Who is alphv?

Alphv, also widely tracked as BlackCat, is a ransomware operation that emerged in late 2021 and has operated primarily as a ransomware-as-a-service model. Affiliates gain access to victim networks, exfiltrate data, and deploy ransomware, after which the group typically pressures victims by threatening to publish stolen material on a dedicated leak site. The group has been noted for using custom ransomware written in Rust, for double-extortion tactics, and for targeting organisations across multiple sectors and countries.

In this case the group’s leak-site listing constitutes a claim that PT Fajar Surya Wisesa Tbk was breached and that internal files were taken. No additional statements attributed to alphv about this specific victim—beyond the listing and the assertion of exfiltration—are provided in the record. As with other alphv claims, the listing itself is an unverified assertion until corroborated by the organisation or independent investigators.

About PT Fajar Surya Wisesa Tbk

PT Fajar Surya Wisesa Tbk is a leading packaging-paper manufacturer in Indonesia. It operates with an installed capacity of more than 1.5 million tons per year and produces Kraft Liner Board and Corrugated Medium Paper used in carton-box packaging, as well as Coated Duplex Board for display packaging. The company was established as a limited-liability entity under Indonesian law on 29 February 1988 and has been listed on the Jakarta Stock Exchange (now the Indonesia Stock Exchange) since 19 December 1994 under the ticker FASW.JK.

Organisations of this type sit at the centre of manufacturing and supply-chain activity. They routinely hold employee records, supplier and customer contracts, logistics data, financial information and internal operational documents. A breach affecting such a firm is consequential because the data can touch workers, business partners and the wider packaging ecosystem that relies on reliable paper supply for consumer and industrial goods.

The information in question

The facts state only that internal files were exfiltrated in a ransomware attack. No inventory of specific data categories—such as names, identity numbers, payroll details, or customer lists—has been publicly disclosed in the material provided. Exact contents therefore remain unconfirmed.

Companies in the packaging-manufacturing sector typically maintain human-resources files, vendor and customer databases, production and quality records, financial and banking information, and internal correspondence. Any of these could theoretically have been among the files claimed to have been taken, but that possibility is not established fact. Until a fuller accounting is released, the prudent position is that the nature and sensitivity of the material are unknown beyond the general description of “internal files.”

The real-world impact

For individuals, the main risks are secondary misuse of any personal or contact information that may have been present in corporate files—phishing, social-engineering attempts, or fraudulent approaches that reference genuine business relationships. Because the headcount of affected people is unknown, it is impossible to say how widely those risks extend. For the organisation, the consequences can include operational disruption, costs of investigation and remediation, potential regulatory scrutiny, and damage to trust among employees, suppliers and customers.

None of these outcomes is automatic; they depend on what was actually taken and how it is later used. The absence of confirmed numbers and data types means the public cannot yet gauge severity with precision. What can be said is that ransomware incidents involving exfiltration routinely create both immediate recovery burdens for the company and longer-term vigilance requirements for anyone whose details may have been stored in the stolen material.

If your data was in this claimed breach

If you have a past or present connection to PT Fajar Surya Wisesa Tbk—as an employee, contractor, supplier or customer—consider the following practical steps:

• Treat unsolicited messages that reference the company, invoices, or internal projects with heightened caution; verify through known official channels before responding or clicking links.
• Monitor financial and email accounts for unusual activity and enable multi-factor authentication where available.
• Change passwords on any accounts that may have shared credentials or been used in company systems, and avoid reusing those passwords elsewhere.
• Retain records of any suspicious contact that appears to draw on internal knowledge of the firm.
• Run a free exposure scan of your email address to check whether your information has already surfaced in known breach data sets.

Public detail on this incident remains limited. Further clarity will depend on any additional statements from the company or independent reporting. Until then, measured caution is the most useful response.

AICompiled with AI assistance from public sources and published under our editorial standards.