# Self-managed MongoDB evidence preservation before destructive restore > Source-anchored research for Self-managed MongoDB evidence preservation before destructive restore. Run status: COMPLETED. Parent: [Security KB Articles](https://llms-explorer.com/tree/security-kb-articles/) · 3 facets · 11 facts · page: https://llms-explorer.com/tree/self-managed-mongodb-evidence-preservation-before-destructive-restore/ ## How it works - CISA places immediate isolation first: disconnect affected systems, or take impacted networks offline at switch level when individual isolation is impractical. It recommends coordinated isolation and out-of-band communications because attackers may monitor response activity. This is general incident guidance, not a tested MongoDB procedure. (low confidence) — [source](https://www.cisa.gov/stopransomware/ransomware-guide) - CISA permits powering devices down to prevent spread when network disconnection is unavailable. It warns that doing so loses volatile-memory evidence and reserves this action for cases where temporary network shutdown or other disconnection is impossible. (low confidence) — [source](https://www.cisa.gov/stopransomware/ransomware-guide) ## Problems, failure modes and limitations - For an admin-inclusive restore, the mongorestore 100.20.0 reference says --drop replaces all user credentials with dump-defined users. With authorization enabled, the tool must authenticate to both an existing user and a dump-defined user; failure to authenticate to the latter can leave an empty database. (low confidence) (verified as of 2026-10-31) — [source](https://www.mongodb.com/docs/database-tools/mongorestore.md) - The mongorestore 100.20.0 reference says duplicate-key and document-validation errors do not stop the default restore. --stopOnError changes that behavior. Inference: reaching the end of processing is not proof that all input documents were restored; inspect errors and the complete result. This does not assert that every such error returns exit code zero. (low confidence) (verified as of 2026-10-31) — [source](https://www.mongodb.com/docs/database-tools/mongorestore.md) - An August 19, 2021 first-hand report using mongorestore 100.4.1 and MongoDB 5.0.2 shows five documents restored and zero document failures, followed by a user/role merge error and exit status 1. This historical report demonstrates why document counters alone can miss an authentication-state restore failure; it does not establish the same defect in 100.20.0. (low confidence) (verified as of 2021-08-19) — [source](https://www.mongodb.com/community/forums/t/mongorestore-not-working-when-roles-are-added/120220) · [also](https://www.mongodb.com/docs/database-tools/mongorestore.md) - A successful logical restore cannot alone establish clean incident recovery. MongoDB documents namespace-limited dropping and credential replacement, while CISA separately calls for investigating persistence, cleaning and rebuilding, addressing affected credentials and vulnerabilities, and keeping recovery networks clean. Inference: restore completion does not prove evidence sufficiency, attacker eviction, trustworthy identity state, or safe reconnection. (medium confidence) — [source](https://www.cisa.gov/stopransomware/ransomware-guide) · [also](https://www.mongodb.com/docs/database-tools/mongorestore.md) ## Facts and statements - CISA recommends cloud-volume snapshots for later forensic review. It separately addresses memory acquisition; a volume snapshot should not be described as satisfying every evidence-preservation boundary. (low confidence) — [source](https://www.cisa.gov/stopransomware/ransomware-guide) - Under its condition that no initial mitigation appears possible, CISA calls for system images and memory captures from a sample of affected devices, relevant logs, and precursor-malware samples. It also calls for preserving volatile or short-retention evidence, including memory and firewall log buffers. (low confidence) — [source](https://www.cisa.gov/stopransomware/ransomware-guide) - In the documentation explicitly labeled mongorestore 100.20.0, --drop removes target collections represented in the backup before restoring them; it leaves collections absent from that backup. Inference: an attacker-created collection outside the backup can survive this logical restore, so --drop is not a complete destination purge. (low confidence) (verified as of 2026-10-31) — [source](https://www.mongodb.com/docs/database-tools/mongorestore.md) - MongoDB documents that mongodump overwrites existing files in its output folder and instructs users to back up or rename that folder before repeated runs. Inference for evidence handling: reusing a prior evidence-dump path can destroy the previous capture; a logical dump is not a substitute for separately preserved host and memory evidence. (medium confidence) — [source](https://www.mongodb.com/docs/manual/tutorial/backup-and-restore-tools.md) · [also](https://www.cisa.gov/stopransomware/ransomware-guide) - IBM X-Force explains that memory artifacts can disappear at shutdown and can also be overwritten while a machine remains running. Its May 27, 2026 article uses a simulated exfiltration scenario, not MongoDB. Together with CISA, this supports treating acquisition timing as a separate decision from disk or volume preservation; it does not promise recoverable artifacts. (medium confidence) — [source](https://www.ibm.com/think/x-force/identifying-exfiltrated-data-part-3) · [also](https://www.cisa.gov/stopransomware/ransomware-guide)