Archive Collected Data

ADVSTORESHELL encrypts with the 3DES algorithm and a hardcoded key prior to exfiltration.^[2]

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

AppleSeed has compressed collected data before exfiltration.^[4]

APT28 used a publicly available tool to gather and compress multiple documents on the DCCC and DNC networks.^[1]

APT32's backdoor has used LZMA compression and RC4 encryption before exfiltration.^[5]

Aria-body has used ZIP to compress data gathered on a compromised host.^[6]

Axiom has compressed and encrypted data prior to exfiltration.^[7]

Backdoor.Oldrea writes collected data to a temporary file in an encrypted form before exfiltration to a C2 server.^[8]

BloodHound can compress data collected by its SharpHound ingestor into a ZIP file to be written to disk.^[9][10]

BLUELIGHT can zip files before exfiltration.^[11]

Bumblebee can compress data stolen from the Registry and volume shadow copies prior to exfiltration.^[12]

Cadelspy has the ability to compress stolen data into a .cab file.^[13]

Chrommme can encrypt and store on disk collected data before exfiltration.^[14]

Daserf hides collected data in password-protected .rar archives.^[15]

Dragonfly has compressed data into .zip files prior to exfiltration.^[16]

Dtrack packs collected data into a password protected archive.^[17]

Ember Bear has compressed collected data prior to exfiltration.^[18]

Empire can ZIP directories on the target system.^[19]

Epic encrypts collected data using a public key framework before sending it over the C2 channel.^[20] Some variants encrypt the collected data with AES and encode it with base64 before transmitting it to the C2 server.^[21]

Exaramel for Windows automatically encrypts files before sending them to the C2 server.^[22]

FELIXROOT encrypts collected data with AES and Base64 and then sends it to the C2 server.^[23]

Following data collection, FIN6 has compressed log files into a ZIP archive prior to staging and exfiltration.^[24]

Gold Dragon encrypts data using Base64 before being sent to the command and control server.^[25]

The Ke3chang group has been known to compress data before exfiltration.^[26]

Kessel can RC4-encrypt credentials before sending to the C2.^[27]

KONNI has encrypted data and files prior to exfiltration.^[28]

Lazarus Group has compressed exfiltrated data with RAR and used RomeoDelta malware to archive specified directories in .zip format, encrypt the .zip file, and upload it to C2. ^[29][30][31]

Leviathan has archived victim's data prior to exfiltration.^[32]

LightNeuron contains a function to encrypt and store emails that it collects.^[33]

Lizar has encrypted data before sending it to the server.^[34]

LoFiSe can collect files into password-protected ZIP-archives for exfiltration.^[35]

LuminousMoth has manually archived stolen files from victim machines before exfiltration.^[36]

Lurid can compress data before sending it.^[37]

Machete stores zipped files with profile data from installed web browsers.^[38]

menuPass has encrypted files and information before exfiltration.^[39][40]

NETWIRE has the ability to compress archived screenshots.^[41]

Patchwork encrypted the collected files' path with AES and then encoded them with base64.^[42]

Pillowmint has encrypted stolen credit card information with AES and further encoded it with Base64.^[43]

PowerLess can encrypt browser database files prior to exfiltration.^[44]

After collecting documents from removable media, Prikormka compresses the collected files, and encrypts it with Blowfish.^[45]

Proton zips up files before exfiltrating them.^[46]

Raccoon Stealer archives collected system information in a text f ile, System info.txt, prior to exfiltration.^[47]

Remexi encrypts and adds all gathered browser data into files for upload to C2.^[48]

RunningRAT contains code to compress files.^[25]

ShimRatReporter used LZ compression to compress initial reconnaissance reports before sending to the C2.^[49]

Spica can archive collected documents for exfiltration.^[50]

TAINTEDSCRIBE has used FileReadZipSend to compress a file and send to C2.^[51]

VERMIN encrypts the collected files using 3-DES.^[52]

WellMail can archive files on the compromised host.^[53]

XCSSET will compress entire ~/Desktop folders excluding all .git folders, but only if the total data size is under 200MB.^[54]

Zebrocy has used a method similar to RC4 as well as AES for encryption and hexadecimal for encoding data before exfiltration. ^[55][56][57]

System scans can be performed to identify unauthorized archival utilities.