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Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
13 distinct techniques documented for this family, organized by ATT&CK tactic.
The infection chain spans five stages: an obfuscated 1.3MB JS dropper → multi-layer XOR-decrypted PowerShell → reflective .NET assembly loader → process-hollowing injector → final AgentTesla payload.
Stage 2: Multi-Layer PowerShell Decryptor ... Layer 2: Custom rotational XOR cipher ... Layer 3: Second XOR pass with derived key
"The choice of Aspnet_compiler.exe as the hollowing target is deliberate. It is: A legitimate Microsoft-signed binary... Not typically monitored by EDR as suspicious"
MITRE ATT&CK TTPs ... T1036.003 Defense Evasion Masquerading: Rename System Utilities Hollowing legitimate .NET tool
The target process -- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe -- is a legitimate Microsoft binary used for precompiling ASP.NET applications.
T1055 Process Injection Reflective .NET injection into Aspnet_compiler.exe
T1055.004 Process Injection: Asynchronous Procedure Call DEV.DOWN.SHOOT method using LoadLibraryA / GetProcAddress
MITRE ATT&CK Mapping Tactic Technique ID Implementation Defense Evasion Process Hollowing T1055.012 Injection into Aspnet_compiler.exe / RegAsm.exe
2 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.