Loaders & Crypters

Threat Landscape & Operational Overview

Loaders (frequently packaged alongside crypters) are stealth evasion frameworks that decrypt, unpack, and inject malware payloads directly into system memory without writing unencrypted artifacts to physical disk. Loaders employ advanced evasion mechanisms, including API unhooking, direct system calls (Syscalls), hollow process spawning, and anti-EDR telemetry blinding. Prominent cybercrime rings utilize commercial loaders to deploy ransomware and infostealers while bypassing traditional signature-based antivirus solutions.

Primary MITRE ATT&CK Tactics & Techniques

Observed technical tradecraft, privilege escalation, and persistence patterns mapped across threat families in this category:

Actively Weaponized Exploits & Vulnerabilities (11 CVEs)

Adversaries deploying loaders & crypters frequently weaponize the following software vulnerabilities for initial ingress, privilege escalation, or lateral movement:

SOC Incident Containment Checklist

Standard operating triage procedure for security teams responding to suspicious or confirmed infections in this category:

1. Collect a memory dump of the infected host to extract decrypted payload strings and unpackaged PE headers.
2. Analyze system event logs for AMSI or ETW patching indicators and unsigned driver loads.
3. Identify parent process responsible for launching suspicious memory-injected child threads.
4. Quarantine host and scan network perimeter for loader command-and-control beacons.
5. Re-image the workstation to guarantee complete removal of memory-resident implants.

Prominent Malware Families in this Category

Top documented threats ranked by historical prevalence and behavioral signatures:

Complete Directory (9 Families)

Alphabetical index of all tracked malware families cataloged under loaders & crypters:

• bazarloader
• bumblebee
• darkgate
• emotet
• gamarue
• nisloder
• pikabot
• smokeloader
• umbra