Archive Collected Data

ADVSTORESHELL encrypts with the 3DES algorithm and a hardcoded key prior to exfiltration.^[1]

Agent Tesla can encrypt data with 3DES before sending it over to a C2 server.^[2]

APT28 used a publicly available tool to gather and compress multiple documents on the DCCC and DNC networks.^[3]

APT32's backdoor has used LZMA compression and RC4 encryption before exfiltration.^[4]

Aria-body has used ZIP to compress data gathered on a compromised host.^[5]

Backdoor.Oldrea writes collected data to a temporary file in an encrypted form before exfiltration to a C2 server.^[6]

BloodHound can compress data collected by its SharpHound ingestor into a ZIP file to be written to disk.^[7]

Cadelspy has the ability to compress stolen data into a .cab file.^[8]

Daserf hides collected data in password-protected .rar archives.^[9]

Dragonfly 2.0 compressed data into .zip files prior to exfiltrating it.^[10]

Emotet has been observed encrypting the data it collects before sending it to the C2 server. ^[11]

Empire can ZIP directories on the target system.^[12]

Epic encrypts collected data using a public key framework before sending it over the C2 channel.^[13] Some variants encrypt the collected data with AES and encode it with base64 before transmitting it to the C2 server.^[14]

Exaramel for Windows automatically encrypts files before sending them to the C2 server.^[15]

FELIXROOT encrypts collected data with AES and Base64 and then sends it to the C2 server.^[16]

Following data collection, FIN6 has compressed log files into a ZIP archive prior to staging and exfiltration.^[17]

Gold Dragon encrypts data using Base64 before being sent to the command and control server.^[18]

Honeybee adds collected files to a temp.zip file saved in the %temp% folder, then base64 encodes it and uploads it to control server.^[19]

The Ke3chang group has been known to compress data before exfiltration.^[20]

Kessel can RC4-encrypt credentials before sending to the C2.^[21]

Lazarus Group malware RomeoDelta archives specified directories in .zip format, encrypts the .zip file, and uploads it to its C2 server. ^[22][23][24]

LightNeuron contains a function to encrypt and store emails that it collects.^[25]

Lurid can compress data before sending it.^[26]

Machete stores zipped files with profile data from installed web browsers.^[27]

menuPass has encrypted files and information before exfiltration.^[28]

OSX_OCEANLOTUS.D scrambles and encrypts data using AES256 before sending it to the C2 server.^[29]

Patchwork encrypted the collected files' path with AES and then encoded them with base64.^[30]

Pillowmint has encrypted stolen credit card information with AES and further encoded it with Base64.^[31]

After collecting documents from removable media, Prikormka compresses the collected files, and encrypts it with Blowfish.^[32]

Proton zips up files before exfiltrating them.^[33]

Remexi encrypts and adds all gathered browser data into files for upload to C2.^[34]

RunningRAT contains code to compress files.^[18]

ShimRatReporter used LZ compression to compress initial reconnaissance reports before sending to the C2.^[35]

VERMIN encrypts the collected files using 3-DES.^[36]

WellMail can archive files on the compromised host.^[37]

Zebrocy uses an encryption method similar to RC4 as well as AES to encrypt data before exfiltration. ^[38][39]

System scans can be performed to identify unauthorized archival utilities.