Malware Sanitization for Hacked Linux Servers | Melbourne

Get your hacked Linux server back under control with direct malware sanitization built for Melbourne production workloads—clean binaries, sealed persistence paths, and a verified reboot path without marketplace delays.

What You'll Get

• Live compromise triage - Process, network, and filesystem indicators mapped so we know what landed and what still phones home.
• Malware & webshell eradication - Rootkits, reverse shells, cron droppers, and PHP/Python backdoors removed with proof of deletion.
• Integrity rebuild - Package reinstalls, binary checksum validation, and SSH/key rotation so trust is restored, not assumed.
• Hardening pass - Fail2ban/ssh config, unnecessary services disabled, outbound allowlists, and file-integrity monitoring hooks.
• Incident report - Plain-English timeline, IOCs, and next-step recommendations your team can hand to auditors or insurers.
• Optional monitoring handoff - Baseline metrics and alert cues so recurrence is caught in minutes, not weeks.

Serving Melbourne & surrounds

Melbourne teams face a distinct mix: always-on CBD SaaS and fintech stacks, industrial and freight hosts near port and logistics corridors, and café-strip / high-street retailers whose booking and POS backends sit on the same VPS as marketing sites. When a box is mined or phished, peak lunch trade and end-of-month freight windows make downtime expensive. We work remote-first across metro Melbourne and can coordinate change windows that respect strata office access and warehouse after-hours schedules—including clients around Melbourne warehouse precincts and Melbourne office towers when on-site console access is required.

• CBD and inner-metro SaaS: multi-tenant app servers hit by webshells after plugin or deploy-key leaks
• Industrial / freight hosts: crypto-miners spiking CPU during peak dispatch, exhausting IOPS on shared storage
• Remote-first with scheduled maintenance windows; on-site console support arranged when KVM/IPMI is locked or networking is severed

How We Work

1. Step 1: Reach Out - Tell us host OS, access method (SSH/IPMI), symptoms (CPU, outbound spikes, defacement), and business impact. We listen first and confirm scope.
2. Step 2: Tailored Plan - Fixed-quote Basic, Standard, or Premium sanitization path—no hourly surprises for core cleanup.
3. Step 3: We Deliver - We isolate, purge malware, rebuild trust on packages and keys, and harden the attack surface while you keep stakeholders informed.
4. Step 4: Confirm & Follow-up - You receive a plain-English report, verification commands, and optional follow-up monitoring or a second pass if new IOCs appear.

Common Issues & How to Fix Them

Below are issues we see repeatedly on compromised Linux hosts—safe first checks you can run, plus when to stop and escalate.

Unexpected CPU or load average with no matching app traffic

Classic crypto-miner or fork-bomb persistence after a weak SSH password or leaked deploy key; Melbourne logistics hosts often notice this first during freight peaks when batches already stress the box.

1. Step 1: Run top -c and ps auxf; note unknown users or binaries in /tmp, /dev/shm, or hidden dirs under /var.
2. Step 2: Check crontab -l for every user plus /etc/cron.* and systemd timers (systemctl list-timers) for curl|bash droppers.
3. Step 3: Verify with ss -tulpn and compare outbound connections; if load drops only after killing a mystery binary that reappears, stop DIY and book full sanitization.

Website serves unfamiliar PHP or returns 200 on paths you never deployed

Webshells planted via vulnerable CMS plugins or mis-set upload dirs—common on shared VPS stacks behind high-street retail and clinic booking sites.

1. Step 1: Search recently modified PHP under the docroot: find /var/www -name '*.php' -mtime -7 -ls and flag files with eval(base64_decode or assert($_.
2. Step 2: Diff against your last known-good deploy or git tree; quarantine suspects by renaming, do not leave them executable.
3. Step 3: Confirm with access logs for POST spikes to odd URIs; if new shells keep appearing after deletion, the attacker still has a write path—escalate for root-cause cleanup.

SSH logins succeed from unknown IPs or authorized_keys keeps growing

Credential stuffing or post-exploit key injection; once persistence is in authorized_keys or a rogue systemd user unit, password changes alone will not save you.

1. Step 1: Inspect ~/.ssh/authorized_keys for every account and /root/.ssh; note keys without your comment tags.
2. Step 2: Review /var/log/auth.log (or journalctl -u ssh) for Accepted publickey from unfamiliar ranges; disable password auth temporarily if still enabled.
3. Step 3: Rotate keys, restart sshd, and re-check; if unknown keys reappear within hours, assume deeper rootkit or backdoored binaries and engage professional sanitization.

When DIY is not enough (urgent, unsafe, recurring, or burning time), book Fixwebnode for direct professional support—no freelancers, bidding, or marketplace noise.

Expert Insights

On Melbourne CBD multi-tenant app hosts we repeatedly see attackers hide miners not only in cron but as a user-level systemd lingering service under a compromised deploy account—systemctl --user units that survive reboot even after root crons are wiped. After killing obvious /tmp binaries, run loginctl enable-linger audits and find /home -path '*/.config/systemd/user/*' -type f before you declare the box clean. Pair that with rpm -Va or debsums -c and watch for modified /usr/bin/sshd or liblzma-adjacent oddities; a “clean” process list with a trojaned sshd is how reinfection returns inside 48 hours. We also baseline outbound DNS query volume pre/post cleanup—sustained queries to newly registered domains after a “successful” wipe almost always means a second-stage loader you have not found yet.

Why Choose Fixwebnode

We are a direct Linux infrastructure provider—not a bid board. You work with specialists who have cleaned production Debian/Ubuntu/RHEL fleets under real downtime pressure for Melbourne commercial clients, with clear fixed scopes and human handoff notes your non-technical stakeholders can read.

• ✓ Hands-on Linux incident response: rootkits, webshells, miners, and SSH persistence
• ✓ Melbourne-aware change windows for CBD, industrial, and retail-style uptime needs
• ✓ Fixed-quote packages plus optional hardening and monitoring—no freelancers, no auction

Tools & Technologies

ssh/sftp, tmux, auditd, rkhunter, chkrootkit, lynis, clamav (targeted scans), yara rulesets, strace/lsof, ss/netstat, tcpdump, fail2ban, ufw/nftables, systemd, journalctl, debsums/rpm -V, tripwire/aide-style FIM hooks, git-based docroot diffs, IPMI/KVM console when network path is hostile.

Perfect For

Melbourne SaaS, agencies, clinics, and small-business operators who run Linux VPS or bare metal and need a compromised host restored without theatre. Ideal when CPU, outbound traffic, or defacement already hit customers and you want one accountable provider from triage through hardening—not a chain of unknown bidders.

Ready to lock the box down? Call 0421498927 or start at fixwebnode.com.au/contact-support and we will map the fastest safe cleanup path.