docflow-cryptopronpm
Advisory published Updated
docflow-cryptopro is a confirmed malicious npm package (MAL-2026-13279) that executes malicious code on install (malicious version 35.1.6). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in docflow-cryptopro (npm)
What this malware does
On require of the package's main, platform.js downloads an opaque platform-specific binary from obfuscated Cloudflare Workers subdomains (hostnames assembled from split string fragments such as ['oob-worke','r.cf102-baf.workers','.d','ev']) with a DNS-TXT covert-channel fallback that reassembles a base64 payload from numbered TXT records under c.*.dl.wel1.ru. The binary is written to a temp path under a decoy name (e.g. dotnet_diag.exe,.cache_), chmod +x is applied on POSIX, and it is spawned detached via /bin/sh -c '<path> &' or cmd.exe /c start /b. Execution is gated by an 'analytics_state' marker and opt-out env-var checks that function as cover for the drop. The advertised purpose is 'cryptographic primitives', which does not match downloading and executing an unverified native binary from workers.dev hosts. The package name (docflow-cryptopro) resembles the CryptoPro / КриптоПро brand family and is not affiliated with that vendor.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for docflow-cryptopro (version 35.1.6).
If you installed it — respond
Remove docflow-cryptopro from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If docflow-cryptopro was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks docflow-cryptopro-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.