Malicious SHA-256 file hash 0c99433c7d43… (OffSeq Mirage)
OffSeq Mirage honeypot sensors observed this SHA-256 file hash 6 time(s) in attacker activity between 2026-06-24 and 2026-07-04. Observed technique: T1105 (Ingress Tool Transfer). Seen from attacker infrastructure in IT, KR, IR. 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 Analysis
Technical Summary
This threat intelligence entry identifies a specific malicious file by its SHA-256 hash observed by OffSeq Mirage honeypot sensors during attacker activity in late June 2026. The file is linked to the MITRE ATT&CK technique T1105, which involves ingress tool transfer, suggesting the file was used to stage or deliver malicious payloads such as droppers, web shells, cryptocurrency miners, or post-exploitation tools. The detection of this hash in an environment indicates potential compromise or attacker presence. There is no evidence of widespread exploitation or active campaigns beyond the honeypot observations. Since this is an indicator of compromise and not a software vulnerability, no patch or official fix exists. Organizations should use this hash to scan their environments and incorporate it into threat intelligence feeds for detection and response.
Potential Impact
The presence of this malicious file hash in an environment indicates potential compromise involving the transfer and staging of harmful software components such as droppers, web shells, miners, or post-exploitation tools. While the file has been observed multiple times in attacker activity, there is no evidence of widespread exploitation or active targeting campaigns. Detection of this file suggests an attacker may have established or attempted to establish persistence or further control within the environment.
Mitigation Recommendations
No patch or official fix is applicable because this is an indicator of compromise rather than a software vulnerability. Organizations should use the provided SHA-256 hash to scan their environments, including endpoint detection and response (EDR) and antivirus (AV) systems, to identify any presence of this malicious file. Incorporate this indicator into threat intelligence feeds and monitoring tools to detect potential ingress tool transfer activity. If detected, follow standard incident response procedures to investigate and remediate the compromise.
Indicators of Compromise
- hash: 0c99433c7d433d65ab890dcee20b330f262379d532bc76f91e18f09ecfa5fb54
Malicious SHA-256 file hash 0c99433c7d43… (OffSeq Mirage)
Description
OffSeq Mirage honeypot sensors observed this SHA-256 file hash 6 time(s) in attacker activity between 2026-06-24 and 2026-07-04. Observed technique: T1105 (Ingress Tool Transfer). Seen from attacker infrastructure in IT, KR, IR. 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
Technical Analysis
This threat intelligence entry identifies a specific malicious file by its SHA-256 hash observed by OffSeq Mirage honeypot sensors during attacker activity in late June 2026. The file is linked to the MITRE ATT&CK technique T1105, which involves ingress tool transfer, suggesting the file was used to stage or deliver malicious payloads such as droppers, web shells, cryptocurrency miners, or post-exploitation tools. The detection of this hash in an environment indicates potential compromise or attacker presence. There is no evidence of widespread exploitation or active campaigns beyond the honeypot observations. Since this is an indicator of compromise and not a software vulnerability, no patch or official fix exists. Organizations should use this hash to scan their environments and incorporate it into threat intelligence feeds for detection and response.
Potential Impact
The presence of this malicious file hash in an environment indicates potential compromise involving the transfer and staging of harmful software components such as droppers, web shells, miners, or post-exploitation tools. While the file has been observed multiple times in attacker activity, there is no evidence of widespread exploitation or active targeting campaigns. Detection of this file suggests an attacker may have established or attempted to establish persistence or further control within the environment.
Defensive Guidance
No patch or official fix is applicable because this is an indicator of compromise rather than a software vulnerability. Organizations should use the provided SHA-256 hash to scan their environments, including endpoint detection and response (EDR) and antivirus (AV) systems, to identify any presence of this malicious file. Incorporate this indicator into threat intelligence feeds and monitoring tools to detect potential ingress tool transfer activity. If detected, follow standard incident response procedures to investigate and remediate the compromise.
Technical Details
- Severity Source
- AI-assessed (no CVSS data)
Indicators of Compromise
Hash
| Value | Description | Copy |
|---|---|---|
hash0c99433c7d433d65ab890dcee20b330f262379d532bc76f91e18f09ecfa5fb54 | OffSeq Mirage — a malicious file, observed 2026-06-24..2026-06-25, 2× |
Threat ID: 6a3d6ce24853345fc1474fb9
Added to database: 06/25/2026, 18:01:06 UTC
Last enriched: 07/02/2026, 20:51:33 UTC
Last updated: 08/08/2026, 02:16:23 UTC
Views: 62
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