Deep Email Threat
Detection
Most security tools only see the tip of the iceberg.
Traditional AV, EDR and SEGs stop only known threats. SecuLetter performs assembly-level
reverse-engineering and advanced sandboxing to uncover evasive, zero-day and file-borne attacks
before they execute.
Why Existing Solutions Are Insufficient
Known threats are caught by signatures. Sandboxes and behavior engines catch some unknowns — but sophisticated attacks use VM evasion, memory corruption, obfuscation and crafted exploits that hide until execution. SecuLetter inspects at the instruction/assembly level to reveal what others miss.
- Known Threats: Signature-based detection (AV, EDR)
- Unknown Threats: Sandbox & behavior-based detection
- Hidden Threats: Assembly-level evasive attacks
SecuLetter's reverse-engineering pipeline detaches and analyzes machine instructions in real time, detecting memory manipulation, persistence, and evasion attempts before the payload runs — giving you true protection against zero-day and weaponized attachments.
Security Categories
Assembly-level reverse engineering and instruction monitoring to detect evasive and unknown attacks that bypass traditional tools.
Real-time detection and neutralization of weaponized attachments, macro malware, and file-borne zero-day exploits.
Integrated static, dynamic, AI/CTI, sandbox, CDR and reverse-engineering analyses to minimize false positives and maximize detection accuracy.
Supported deployments include on-prem appliances (SLE), inline SaaS (SLES), and cloud-native DISARM for Microsoft 365 / Gmail.
SecuLetter — Cloud Advanced Email Security (SLES)
Delivering clean, safe email instantly — before users click.
SecuLetter detects and neutralizes advanced email threats that standard SEGs miss — using reverse-engineering, sandboxing, and CDR to ensure safe delivery with no end-user disruption.
- Real-time email defense — Catch zero-day exploits, macro malware, and weaponized attachments missed by conventional SEGs.
- Assembly-level reverse engineering — Inspect instructions and VM behavior to uncover evasive techniques before execution.
- Seamless experience — Clean emails delivered instantly with minimal latency and no manual intervention.
Key Features & Benefits
SecuLetter combines high-fidelity static, dynamic and reverse-engineering analyses with Content Disarm & Reconstruction (CDR) to remove active exploit content and rebuild safe files — all at high speed and low latency.
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1. Assembly-Level Diagnosis
- Inspect machine instructions to detect obfuscation, memory corruption, and persistence attempts
- Significantly reduce false positives and false negatives compared to legacy sandboxes
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2. Multi-layered Protection
- Static and dynamic analysis
- Reverse-engineering engine
- AI & threat intelligence correlation
- PE and executable analysis
- Password-protected and nested file handling
- Content Disarm & Reconstruction (CDR)
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3. Faster, Safer Scans
- Runs up to 5× faster than legacy APT sandboxes
- Designed for high throughput with low impact to mail flow
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4. Neutralize Evasion Techniques
- Detects VM evasion, script decoding, and other advanced hiding techniques
Product Lineup & Deployment Options
Flexible product choices for different environments and risk profiles.
Email Security (Appliance & SaaS)
- SLE (Secure Email Gateway - Appliance) — SLE1000 (Entry), SLE3000 (Mid), SLE5000 (High-end)
- SLES (Data-center Hosting / Inline SaaS) — Lightweight inline solution for cloud email
- DISARM — Microsoft 365 & Gmail native integration (CDR & disarm mode)
File Security & CDR Appliances
- SLF (Secure File Gateway) — SLF450 (Entry), SLF900 (Mid), SLF1800 (High-end)
- SLCDR (Content Disarm & Reconstruction) — SLCDR450, SLCDR900, SLCDR1800
- Flexible Licensing — Appliance, per-user SaaS, or hybrid deployment
Trusted Partnership: NKH Solution & SecuLetter
Official SecuLetter certified partner — delivering reverse-engineering based email defense, CDR and integrations with SEGs, firewalls and cloud email platforms.
SecuLetter is trusted across government, defense, finance, manufacturing and critical infrastructure worldwide.