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Indicators Dissecting FudCrypt: A Real-World Malware Crypting Service Analysis

16cbe40fb24ce2d422afddb5a90a5801ced32ef52c22c2fc77b25a90837f28ad

TLP:CLEAR
Active

SHA-256 Hash

Description

FudCrypt is a Cryptor-as-a-Service platform offering subscription-based malware obfuscation for $800 to $2,000 monthly. The service wraps customer payloads in multi-stage deployment packages featuring DLL sideloading, AMSI and ETW interference, silent UAC elevation via CMSTPLUA, and Windows Defender tampering through Group Policy. Analysis of recovered server infrastructure revealed 200 registered users, 334 builds, and comprehensive fleet C2 command history across 32 enrolled agents. The operator maintains a separate signing infrastructure using four Azure Trusted Signing accounts to sign operator-controlled binaries including fleet agents, native loaders, and ScreenConnect installers. The platform employs 20 undocumented DLL sideload carrier profiles, per-build polymorphic encryption with layered XOR-32, RC4-16, and custom S-box transforms, and an advanced development branch featuring indirect syscalls, module stomping, fiber-based execution, and Ekko sleep obfuscation. Server infras...

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Details

Name / Label
Dissecting FudCrypt: A Real-World Malware Crypting Service Analysis
Pattern Type
STIX
Confidence
75%
Valid From
May 26, 2026 02:41
Total Sightings
0
Added
May 26, 2026
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Record an observation of 16cbe40fb24ce2d422afddb5a90a5801ced32ef52c22c2fc77b25a90837f28ad

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