A ELF64 ransomware binary uses XOR string obfuscation keyed on a CLI passphrase, contacts a DigitalOcean C2 to register and retrieve an AES-256-CBC key and IV, recursively encrypts target files in /share/ renaming them to .24bes, exfiltrates the originals via HTTP PUT, zeroes and removes the source files, and installs a systemd service for persistence.
A Dridex loader DLL that dynamically resolves APIs via CRC32 hashing, uses int3/retn as an indirect call mechanism to evade analysis, decrypts embedded strings with RC4, and connects to four hardcoded C2 servers over HTTPS to download additional modules.
Reverse engineering PHORPIEX dropper - analyzing clipboard hijacking, USB spreading, and UPnP NAT traversal techniques.
A .NET DLL decodes architecture-specific shellcode from an embedded base64 string, allocates executable memory, and spawns a thread to execute it. The shellcode performs NTDLL unhooking, AMSI and ETW patching before executing an embedded PE payload identified as a PoshC2 dropper.