IndicatorPublished 07/19/2026Updated 07/22/2026

Malicious SHA-256 file hash f3a8ffee82d6… (OffSeq Mirage)

Source OffSeq Mirage

Description

A malicious file identified by the SHA-256 hash f3a8ffee82d63d285245f66f82f7add5a056a20f4b339e8cdd218ffd3ac6314d was observed by OffSeq Mirage honeypot sensors during attacker activity from July 19 to July 22, 2026. The file is associated with the MITRE ATT&CK technique T1105 (Ingress Tool Transfer) and was seen originating from attacker infrastructure in Germany. This hash fingerprints a specific malicious payload that could be a dropper, web shell, miner, or post-exploitation tool. There is no information about known exploits in the wild or affected software versions. Organizations are advised to match this hash against files in their environments and security tools to detect potential compromise.

Summary

OffSeq Mirage honeypot sensors detected a malicious file with SHA-256 hash f3a8ffee82d63d285245f66f82f7add5a056a20f4b339e8cdd218ffd3ac6314d during attacker activity between 2026-07-19 and 2026-07-22. The observed technique is T1105 (Ingress Tool Transfer), indicating the file was transferred into a target environment as part of an attack. The file is linked to a malicious payload such as a dropper, web shell, miner, or post-exploitation tool. The attacker infrastructure was located in Germany. No specific software versions are affected, and no known exploits in the wild have been reported for this file hash.

Impact

The presence of this malicious file hash indicates potential compromise involving the transfer of a harmful payload into a target environment. The payload could facilitate further malicious activities such as system compromise, unauthorized access, or resource exploitation. However, there is no evidence of active exploitation in the wild or direct impact on specific software versions.

Defensive guidance

No official patch or remediation is applicable as this is an indicator of compromise rather than a vulnerability. Organizations should use this SHA-256 hash to scan their environments, including endpoint detection and response (EDR) and antivirus (AV) systems, to identify and remove any instances of this malicious file. Incorporate this indicator into threat intelligence feeds and monitoring tools to detect potential attacker activity. No further action is required unless the file is detected in the environment.

Indicators of compromise

Hashes 1

f3a8ffee82d63d285245f66f82f7add5a056a20f4b339e8cdd218ffd3ac6314dOffSeq Mirage — a malicious file, observed 2026-07-19..2026-07-22, 2×

References

mirage.offseq.com (opens in a new tab)

Description

AnalysisAI-generated, updated 10/24/2026, 08:33:00 UTC

Technical details

Indicators of compromise

Hashes 1

References

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