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Malicious SHA-256 file hash a9b1c85a7bd7… (OffSeq Mirage)

0
Medium
Published: 06/28/2026 (06/28/2026, 04:14:44 UTC)
Source: OffSeq Mirage★ Featured

Description

OffSeq Mirage honeypot sensors observed this SHA-256 file hash 4 time(s) in attacker activity between 2026-06-28 and 2026-06-29. Observed technique: T1105 (Ingress Tool Transfer). File hashes fingerprint a specific malicious payload (a dropper, web shell, miner, or post-exploitation tool) that was staged or delivered during the attack. Match it against files in your environment and your EDR/AV and threat-intel feeds.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 06/29/2026, 11:51:18 UTC

Technical Analysis

OffSeq Mirage honeypot sensors detected a malicious file with SHA-256 hash a9b1c85a7bd78dd1112ecc75c9070ea8c53078831a17aa09ebeb287fe6e21b72 during attacker activity on 2026-06-28 and 2026-06-29. The file is linked to the MITRE ATT&CK technique T1105 (Ingress Tool Transfer), which involves transferring tools or payloads into a compromised environment. The malicious payload could be a dropper, web shell, miner, or post-exploitation tool. This indicator serves as a fingerprint for detection and response but lacks further technical details or confirmed exploitation reports.

Potential Impact

The presence of this malicious file hash indicates potential attacker activity involving the transfer of a harmful payload into a target environment. The payload type may include droppers, web shells, miners, or post-exploitation tools, which can facilitate unauthorized access, persistence, or resource abuse. However, no confirmed exploitation or widespread attacks using this file hash have been reported to date.

Mitigation Recommendations

No official patch or remediation is applicable as this is an indicator of compromise rather than a vulnerability. Security teams should match this SHA-256 hash against files in their environments, endpoint detection and response (EDR) systems, antivirus (AV) solutions, and threat intelligence feeds to identify potential infections. If detected, standard incident response procedures should be followed to contain and remediate the threat.

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Technical Details

Severity Source
AI-assessed (no CVSS data)

Indicators of Compromise

Hash

ValueDescriptionCopy
hasha9b1c85a7bd78dd1112ecc75c9070ea8c53078831a17aa09ebeb287fe6e21b72
OffSeq Mirage — a malicious file, observed 2026-06-28..2026-06-29, 2×

Threat ID: 6a4258cb27e9c79719c65c3a

Added to database: 06/29/2026, 11:36:43 UTC

Last enriched: 06/29/2026, 11:51:18 UTC

Last updated: 06/30/2026, 02:21:32 UTC

Views: 5

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