Malware

CORALDECK

CORALDECK is malware that stages stolen data for exfiltration by creating password-protected RAR, WinImage, and ZIP archives. It has also exfiltrated data using HTTP POST headers. The provided content specifically identifies these archive formats and the use of HTTP POST headers as exfiltration behavior. No additional high-confidence details on infection vector, associated threat actor, targeted industries, or specific indicators of compromise are provided in the source content.

For your environment

Hunt this family in your stack

Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.

Start free trial

MITRE ATT&CK

Techniques & procedures

6 distinct techniques documented for this family, organized by ATT&CK tactic.

Discovery

1 technique

T1083File and Directory DiscoveryEvidence5

The content is a long ATT&CK-style listing of groups and malware that can 'list files and directories,' 'search for files,' 'enumerate drives,' 'gather file metadata,' or 'browse file systems' on compromised hosts.

Collection

2 techniques

T1560Archive Collected DataEvidence1

Multiple actors and tools are described as using 7-Zip/WinRAR/zip/tar/gzip/makecab/PowerShell Compress-Archive to compress (often password-protect/encrypt) collected data prior to exfiltration (e.g., “used 7zip to archive extracted data in preparation for exfiltration”, “created password-protected RAR archives prior to exfiltration”, “used built-in PowerShell capabilities (Compress-Archive cmdlet) to compress collected data”).

T1560.001Archive via UtilityEvidence1

Command and Control

1 technique

T1071.001Web ProtocolsEvidence1

CORALDECK has exfiltrated data in HTTP POST headers.

Exfiltration

2 techniques

T1048.002Exfiltration Over Asymmetric Encrypted Non-C2 ProtocolEvidence1

Rclone can exfiltrate data over FTP or HTTP, including HTTP via WebDAV.

T1048.003Exfiltration Over Unencrypted Non-C2 ProtocolEvidence2

APT32's backdoor can exfiltrate data by encoding it in the subdomain field of DNS packets.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app

mitre attack websiteNews

Feb 1, 2016

Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted Non-C2 Protocol, Sub-technique T1048.003 - Enterprise | MITRE ATT&CK®

Backdoor that exfiltrates data by embedding it in HTTP POST headers.

mitre attackNews

Mar 18, 2026

Archive Collected Data: Archive via Utility, Sub-technique T1560.001 - Enterprise | MITRE ATT&CK®

Malware/tooling that stages data for exfiltration by creating password-protected archives (RAR/ZIP/WinImage).

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets match these IOCs, which detections are missing, which campaigns to expect next, and what to do in the next 30 minutes.

Start free trial

IOC matching

Match every observed IP, domain, and hash against your live telemetry.

Threat actor attribution

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping6

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.

CORALDECK