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Sys10 is a Windows malware family associated with command-and-control communications over HTTP and basic host profiling of infected systems. It collects the logged-in account name, the logged-in user’s group name, and the victim’s local IP address, then transmits that information to its command-and-control infrastructure. Sys10 also obfuscates its command-and-control domain using a simple single-byte XOR routine. The observed behavior is consistent with lightweight post-compromise reconnaissance and beaconing used to identify victims and provide operators with initial host context.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
8 distinct techniques documented for this family, organized by ATT&CK tactic.
AdFind can extract subnet information from Active Directory; actors used ipconfig /all after exploiting a machine; numerous malware and groups used ipconfig, ifconfig, arp, route, netsh, nbtstat, NBTscan, and related APIs to gather IP, MAC, DNS, DHCP, gateway, proxy, domain, ARP cache, routing, and adapter details.
The content repeatedly describes malware and threat actors collecting the victim username, identifying logged-in users, running whoami, query user, quser, or similar commands to determine the current user or user sessions.
The content repeatedly describes malware and threat actors collecting host details such as hostname, OS version, architecture, CPU, memory, BIOS, language, and other machine characteristics; e.g., "Action RAT has the ability to collect the hostname, OS version, and OS architecture of an infected host."
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."
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Backdoor that collects the logged-in account name and sends it to C2.
Collects local IP addresses and sends them to C2.
Backdoor that collects and exfiltrates the victim's local IP address to C2.
Backdoor that uses a simple XOR loop to encrypt its C2 domain.
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.