Rp100+ billion fraud in 3 hours. We solve the case.
DFI led the digital forensic investigation behind the first BI-FAST fraud cases solved in Indonesia — and has turned digital traces into court-ready evidence since 2006.
Same pattern later hit 8 banks, Jun 2024 – May 2025.
Trusted by leading institutions in Indonesia
Complex Transaction & Settlement Incidents. Solved at the Byte Level.
When unauthorized transactions exploit integration gaps in modern payment channels, conventional logs often leave blind spots. DFI reconstructs byte-level evidence to isolate root causes and establish court-admissible proof.
Every case handled with strict confidentiality and chain-of-custody protocols.
BI-FAST Integration & API Rail Forensics
In-depth investigation of API token leaks, aggregator gateway manipulation, and high-frequency automated transfer anomalies across bank endpoints.
RTGS & High-Value Settlement Audits
Forensic reconstruction of administrative credential misuse, dual-control bypasses, and high-value clearing discrepancies.
Forensic certainty
Our methodology guarantees accurate, legally defensible findings that restore stakeholder trust.
Regulatory alignment & reputation protection
We ensure compliance with OJK, Bank Indonesia and PDP Law standards while mitigating institutional risk and restoring stakeholder confidence.
End-to-end digital forensics,
from first response to the courtroom.
Digital Forensic Investigation
We identify, preserve and analyse evidence from computers, phones, cloud and CCTV.
Expert Witness
Our certified experts present digital evidence clearly and defensibly in court.
Forensic Consulting
Technical advisory for computer-based fraud, data leakage and internal investigations.
OSINT & Digital Footprint
We trace people, accounts and activity across open sources to support investigations.
Data Recovery
We recover deleted, damaged or encrypted data while keeping its evidential value.
Penetration Testing & Reverse Engineering
We test your systems as an attacker would and dissect malware.
Our latest investigations
Full write-ups of our most recent cases: what happened, how the attackers worked, and what to fix. Client details are withheld unless already public.
The first BI-FAST fraud in Indonesia: Rp100+ billion in 3 hours. We solved it.
How our forensic investigation traced unauthorised BI-FAST transfers at a participating bank back to the people behind them.
They used the bank’s own tools: inside an internal RTGS fraud
A 7-stage compromise, from a development server and a phishing email to illegal RTGS transfers, reconstructed from forensic evidence.
Minutes of BI-FAST API fraud through a payment aggregator. No bypass, all authenticated.
Forensic reconstruction of high-velocity automated transfers via compromised partner API keys, identifying token leaks and authentication flaws.
Unauthorised card transactions through EDC terminals: approved while the bank slept.
Investigating nocturnal batch settlement anomalies across merchant POS networks, recovering terminal logs and establishing insider complicity.
Trusted with Indonesia’s most sensitive cases since 2006.
A selection of cases handled for law enforcement, prosecutors, law firms, banks and corporations. Client names are withheld unless already public.
Real cases.
Not theory.
Six reasons corporate, banks, law firms and law enforcement bring their hardest cases to us.
Real case experience, not just theory
Our methods come from incidents we have actually investigated, including the Rp100+ billion BI-FAST fraud: first-hand insight, not hypothetical scenarios.
Led by industry-recognised experts
Our work is led by Ruby Alamsyah, one of Indonesia’s most trusted names in digital forensics, with decades of hands-on investigative and courtroom experience.
Specialised in high-tech financial crime
From banking fraud to insider threats and cross-border cybercrime, we have helped financial institutions contain and resolve major incidents.
Proven forensic methodology
Aligned with global best practices, so evidence stays valid from acquisition to the courtroom.
Advanced Digital Forensics
Purpose-built tools and methodologies for complex digital investigations.
Forensic Certainty
Our methodology guarantees accurate, legally defensible findings.
Our 5-step investigation process, fully confidential.
Consult
Confidential first discussion of your case and scope.
Preserve
Evidence acquired and secured with a documented chain of custody.
Analyse
Examination in our lab with industry-standard forensic tools.
Report
Clear findings for investigators, lawyers and management.
Testify
Our experts explain the findings in regulator and court.
Ruby Alamsyah
Director & Digital Forensic Lead
Ruby has spent 25+ years in IT infrastructure and information security, and has led DFI since 2006. He has served as a digital forensic expert in some of Indonesia's most prominent cases and was the first Indonesian member of the High Technology Crime Investigation Association (HTCIA).
PT Digital Forensic Indonesia
PT Digital Forensic Indonesia (DFI) is an independent digital forensics and cyber investigation firm specializing in the identification, preservation, analysis, and interpretation of digital evidence.
Established in 2006, formerly known as JARNUS Digital Forensics, DFI has supported complex investigations involving financial fraud, cybercrime, digital intrusion, data compromise, and complex technology-related incidents, handling more than 250 cases. We transform fragmented digital traces into structured, defensible, and evidence-based findings—helping organizations understand what happened, determine how it happened, and make informed decisions based on the evidence.
Learn digital forensics from practitioners.
Designed for BOD & executives, Judicial Professionals, government agencies, corporate security teams, forensic investigators, IT professionals, auditors, and legal professionals—with training content tailored for understanding digital evidence, forensic findings and the latest cybercrime cases.
Executive Briefing: Real-Time Payment Fraud Governance & OJK/BI Compliance for BOD
IT Security, Digital Forensics & Lesson Learned from Banking Cases in Indonesia for Board of Director Level
Executive Briefing: Real-Time Payment Fraud Governance & OJK/BI Compliance for Working Level
IT Security, Digital Forensics & Lesson Learned from Banking Cases in Indonesia for Working Level
Cybersecurity Awareness & Cyber Resilience Program
Forensic-driven, interactive, and case-based executive training program
Facing a digital incident? Let's talk.
Every consultation is confidential. Our team typically responds within 1 working day.
Prosperity Tower, 21st Floor, District 8, SCBD
Jl. Jend. Sudirman Kav. 52–53, Jakarta 12190