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httpclient is a Windows malware implant that communicates with its command-and-control infrastructure over HTTP and obfuscates command-and-control content with a single-byte XOR key. It is capable of launching the Windows command interpreter, indicating remote command execution functionality typical of a backdoor or remote administration implant. The available reporting supports HTTP-based C2, simple XOR-protected traffic, and execution of cmd.exe on compromised hosts, but does not provide sufficient high-confidence detail on broader functionality, delivery vector, operator attribution, or sector targeting.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
5 distinct techniques documented for this family, organized by ATT&CK tactic.
Many entries describe XOR, XOR/ADD, bitwise NOT and XOR, ROR plus XOR, hexadecimal encoding after encryption, and custom encoding/obfuscation of HTTP traffic or beacons.
The content is a long ATT&CK-style listing showing numerous malware families and threat groups that 'use HTTP,' 'use HTTPS,' 'HTTP POST requests,' 'HTTP GET requests,' or 'HTTP/S' for command and control communications.
The content is a catalog of malware and threat groups that encrypt command-and-control communications using algorithms such as DES, AES, RC4, XOR, Blowfish, RSA, Camellia, RC2, RC6, and custom ciphers.
"3PARA RAT command and control commands are encrypted within the HTTP C2 channel using the DES algorithm in CBC mode..."; "APT33 has used AES for encryption of command and control traffic."; "Carbanak encrypts the message body of HTTP traffic with RC2 (in CBC mode)."; "Duqu ... data stream can be encrypted with AES-CBC."; "PoisonIvy uses the Camellia cipher to encrypt communications."
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Backdoor that encrypts C2 content with single-byte XOR.
Malware that uses HTTP for command-and-control (C2).
Backdoor/implant that XOR-encrypts C2 content with single-byte key 0x12.
Malware/tool that opens cmd.exe on the victim system for command execution.
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.