Heyoka Backdoor is custom malware associated with the Aoqin Dragon threat actor. Reported behaviors include identifying removable media attached to victim machines, checking whether it is running as a service on a compromised host, and using rundll32.exe for execution, including DLL injection into rundll32.exe. It has been spread through malicious document lures, indicating a user-execution infection vector. The malware has also been named srvdll.dll to appear as a legitimate service, reflecting masquerading behavior on infected Windows systems.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
18 distinct techniques documented for this family, organized by ATT&CK tactic.
The content repeatedly describes victims being lured into opening malicious attachments, enabling macros, launching installers, clicking embedded files/links, or otherwise directly executing malicious content.
Sandworm Team leveraged Microsoft Office attachments which contained malicious macros that were automatically executed once the user permitted them... APT29 has used various forms of spearphishing attempting to get a user to open attachments... DarkGate is distributed through phishing links to VBS or MSI objects requiring user interaction for execution.
The content repeatedly describes payloads, strings, configuration files, scripts, URLs, and binaries being obfuscated or encoded using Base64, XOR, RC4, AES, RSA, hex encoding, custom algorithms, and other methods across many malware families and threat actors.
Examples throughout the content include 'encrypted payloads decrypted and executed in memory,' 'encrypts its configuration file,' 'AES-encrypted resource,' 'RC4 encrypted embedded scripts,' and 'payload includes an encrypted main component.'
The content repeatedly describes threat actors and malware deleting files, tools, scripts, logs, droppers, staged data, and artifacts from compromised systems to cover tracks, remove evidence, or self-delete.
"actors used the following command ... to obtain information about services: net start"; "APT1 used the commands net start and tasklist to get a listing of the services on the system"; "OilRig has used sc query on a victim to gather information about services"; "Indrik Spider has used the win32_service WMI class to retrieve a list of services"
The content repeatedly describes malware and threat actors obtaining lists of running processes, using utilities such as tasklist, ps, WMI, Get-Process, CreateToolhelp32Snapshot, EnumProcesses, and similar APIs/commands to enumerate active processes on victim systems.
The content is a long ATT&CK-style listing of malware and threat actors that collect host details such as OS version, hostname, architecture, CPU, memory, BIOS, language, and other basic system characteristics; examples include use of commands like systeminfo, ver, uname, sw_vers, and WMI queries.
Multiple entries describe enumerating local, logical, or physical drives and disk/volume information, e.g., 'can enumerate local drives,' 'GetLogicalDrives,' 'fsutil fsinfo drives,' 'list drives,' and 'discover logical drive information including the drive type, free space, and volume information.'
ADVSTORESHELL can list connected devices. APT28 uses a module to receive a notification every time a USB mass storage device is inserted into a victim. APT37 has a Bluetooth device harvester, which uses Windows Bluetooth APIs to find information on connected Bluetooth devices.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Backdoor spread through malicious document lures.
Backdoor that identifies removable media attached to victim machines.
Backdoor malware that identifies removable media attached to infected machines.
Backdoor spread through malicious document lures.
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.