A composite drawn from CFSL Hyderabad's 2023 memory-forensics workshop.
The case involved a director of a Hyderabad-based logistics firm accused under IT Act Section 66C (identity theft) and BNS Section 318 (cheating). The seized device was an Android phone in a powered-on, unlocked state. The first responder followed the cold-boot-aware seizure protocol: place the device in a Faraday bag, transport to the lab without losing power, and capture RAM before shutdown.
WhatsApp on Android encrypts its message database at rest with a key stored in /data/data/com.whatsapp/files/key. Without root, neither the database nor the key is directly accessible. The on-device decrypted state, however, lives in RAM while the app is foregrounded or recently used.
The lab workflow:
- The phone was placed in a chilled enclosure (-40 degrees Celsius) for 60 seconds to slow DRAM bit decay.
- A modified bootloader was loaded over USB and a 6 GB RAM image was extracted.
- The image was scanned by a custom Volatility plugin (developed in-house at CFSL Hyderabad's memory forensics group) looking for the WhatsApp crypto14 key signature in heap regions.
- The key was recovered. A separate logical extraction had captured the encrypted
msgstore.db.crypt14 from the phone's storage.
- The key plus the encrypted DB produced a plain SQLite file. Three months of messages, including thirty-six entries that the user had "Delete for Everyone"-ed, were recovered (because Delete for Everyone removes the message from the remote display, not from the local DB until WhatsApp's housekeeping job runs).
The recovered messages, hashed and produced under BSA 2023 Section 63 with the lab's certificate, established the fraudulent identity claim and the cheating element. The case turned on the cold-boot RAM capture; had the first responder simply pulled the battery, the key would have been gone and the database opaque.
This workflow is the template for any encrypted-app-in-RAM problem: WhatsApp, Signal, Wickr, Telegram secret chats. The capability is not unique to CFSL Hyderabad but the institutional muscle to execute it reliably is, and Indian state FSLs are building the same capability through NFSU's training pipeline.