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7-Zip is a legitimate archive utility that threat actors have used during post-compromise collection and exfiltration. In the provided reporting, it was observed in UNC2447 intrusions as part of recon and exfiltration activity, and in a China-linked UAT-8837 campaign exploiting Sitecore CVE-2025-53690, where attackers compressed sensitive files prior to exfiltration. Specifically, the content states that files such as web.config and Windows registry hives were compressed with 7-Zip before being transferred to attacker-controlled infrastructure. The activity is mapped to MITRE ATT&CK T1560.001 (Archive via Utility). The content does not describe 7-Zip itself as malware, but as a dual-use utility leveraged by threat actors including UNC2447 and UAT-8837.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
...UNC2447 has been observed using the following tools: ... 7ZIP.
15 distinct techniques documented for this family, organized by ATT&CK tactic.
"The MSI file has 4 embedded objects within it" including "an encrypted archive"; "The script.bat contains commands to extract the infected file from the archive and execute it"; "The archive.bat just creates the encrypted archive."
Extracts HIVE ransomware payload(s) from an encrypted archive (int.7z) using 7-Zip's console executable (7zr.exe)
T1070.004. Indicator Removal on Host: File Deletion Deletes some of its files used during operations as part of cleanup, including removing applications such as 7z.exe, tor.exe, ssh.exe
Using 7-Zip to compress stolen data into ZIP files for exfiltration.
The FBI observed several common open source tools on Gunra infrastructure that Gunra actors use to facilitate collection and exfiltration of data, including 7-Zip, RClone, and FileZilla [T1048]
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Legitimate compression utility abused to stage data for exfiltration (e.g., compressing web.config and registry hives such as SAM/SYSTEM).
Archiving utility used to compress/stage data prior to exfiltration.
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.