RDAT

Possible commands include... Execute a PowerShell script... Slippery Snakelet is a small Python-based backdoor with limited capabilities: 1. executes a command via cmd.exe ... Once received, Hawking executes the value in cmd.exe and returns the output.

The security firm also observed BladedFeline deploying PrimeCache, an internet information services module that bore code similarities with the RDAT backdoor.

During the 2016 Ukraine Electric Power Attack, Sandworm Team used an arbitrary system service to load at system boot for persistence for Industroyer. They also replaced the ImagePath registry value of a Windows service with a new backdoor binary.

Eset first observed it in 2023, when it planted a backdoor into systems used by government diplomats from the Kurdistan Regional Government.

During the 2016 Ukraine Electric Power Attack, Sandworm Team used an arbitrary system service to load at system boot for persistence for Industroyer. They also replaced the ImagePath registry value of a Windows service with a new backdoor binary.

During the 2016 Ukraine Electric Power Attack, DLLs and EXEs with filenames associated with common electric power sector protocols were used to masquerade files.

Akira has used legitimate names and locations for files to evade defenses.

Eset first observed it in 2023, when it planted a backdoor into systems used by government diplomats from the Kurdistan Regional Government.

Many entries explicitly describe deleting artifacts 'to cover tracks,' 'evade detection,' 'remove evidence,' 'reduce their footprint,' or as part of 'post-intrusion cleanup process.' Examples include APT28 deleting files to cover tracks, FIN5 using SDelete to clean up the environment, and Dragonfly deleting operational files as part of cleanup.

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.

The content repeatedly describes malware and threat actors decoding, decrypting, deobfuscating, or unpacking payloads, strings, configuration data, commands, and C2 responses prior to execution or use.

"Agent Tesla can capture screenshots of the victim’s desktop"; "AppleSeed can take screenshots on a compromised host"; "APT28 has used tools to take screenshots from victims"; "Cobalt Strike's Beacon payload is capable of capturing screenshots"; "PowerSploit's Get-TimedScreenshot Exfiltration module can take screenshots at regular intervals"; "Hydraq includes a component based on the code of VNC that can stream a live feed of the desktop"

Several entries describe broader use of HTTP/HTTPS and related web mechanisms for C2, including "Crutch has conducted C2 communications with a Dropbox account using the HTTP API," "BLUELIGHT can use HTTP/S for C2 using the Microsoft Graph API," and "Small Sieve can contact actor-controlled C2 servers by using the Telegram API over HTTPS."

The content repeatedly describes threat actors and malware using HTTP and HTTPS for command and control, such as: "Sandworm Team used BlackEnergy to communicate between compromised hosts and their command-and-control servers via HTTP post requests."

C2 traffic from ADVSTORESHELL is encrypted, then encoded with Base64 encoding... APT19 HTTP malware variant used Base64 to encode communications to the C2 server... APT33 has used base64 to encode command and control traffic.

AppleSeed has divided files if the size is 0x1000000 bytes or more. APT28 has split archived exfiltration files into chunks smaller than 1MB. APT41 transfers post-exploitation files dividing the payload into fixed-size chunks to evade detection.

Helminth splits data into chunks up to 23 bytes and sends the data in DNS queries to its C2 server. Kevin can exfiltrate data to the C2 server in 27-character chunks. OopsIE exfiltrates command output and collected files to its C2 server in 1500-byte blocks.

Cannon exfiltrates collected data over email via SMTP/S and POP3/S C2 channels. CURIUM has used IMAP and SMTPS for exfiltration via tools such as IMAPLoader. Kevin can send data from the victim host through a DNS C2 channel.

Crutch can exfiltrate data over the primary C2 channel (Dropbox HTTP API)... ODAgent can use an attacker-controlled OneDrive account to receive C2 commands and to exfiltrate files... OilBooster can use an actor-controlled OneDrive account for C2 communication and exfiltration... ZIRCONIUM has exfiltrated files via the Dropbox API C2.