Safe
This file is a legacy component identified in the National Software Reference Library, and the lack of tier-1 engine detections confirms it is benign software.
49f7592d9d485e5022…99e1036fc4The reasoning behind this verdict
The MT AI Engine weighs every signal from this scan — antivirus detections, sandbox behaviour, code signing, prevalence and historical matches — to reach a single, evidence-based verdict.
The file has been present in our research network since 2009 and is recognized as part of the NSRL legacy database. While one low-trust engine flagged the file, all tier-1 engines returned clean results. The network behavior flagged by our heuristics is consistent with legacy software rather than modern malicious activity. Consequently, we consider this file to be benign.
Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.
17/17 tier-1 engines report clean, with only 1/75 low-trust engine flagging (MaxSecure)
externalIntel.circl hit confirms NSRL legacy status for 'Scrabble Complete'
communityComments include #safe and #nsrl tags
file age of 6259 days (first seen 2009) consistent with legacy software
- NSRL legacy database entry
- 17/17 tier-1 engines clean
- Community #safe tags
No action required; the file is identified as legitimate legacy software.
What to do now
This file looks safe based on everything we checked.
This file is safe to use.
Good habit: only download files from the official website or an app store.
Keep your antivirus and Windows updates switched on so you stay protected.
2 contradictions resolved by the scoring engine
What this file did when executed
This file was detonated in 1 sandbox and its runtime behaviour was observed.
Adversary techniques mapped to the MITRE ATT&CK framework.
- a83f:8110:3ec5:559b:c930:3c06:a2b:601
- 20.99.133.109
- a83f:8110:5c00:7600:6900:6400:5f00:3000
- 13.107.4.50
- 192.229.211.108
- 23.216.147.76
- 20.99.185.48
- 192.168.0.35
- 20.69.140.28
- 23.49.140.110
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERFC42.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERFC43.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERFD2C.tmp.csv
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERFD7C.tmp.txt
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERFD7B.tmp.csv
1 corroborating signal from researcher-curated sources
YARA & heuristic rule matches
One or more medium-severity heuristic rules matched. Not definitive, but the patterns match known malware behaviour.
Sample contacted 12 external IP address(es) and zero domains. Benign software virtually always uses DNS; no-DNS direct-IP C2 is a strong malware indicator because it bypasses reputation systems and dodges domain-based blocklists.
Evidencea83f:8110:3ec5:559b:c930:3c06:a2b:601 · 20.99.133.109 · a83f:8110:5c00:7600:6900:6400:5f00:3000
1 detection across 75 engines
Section entropy & packers
Section-level entropy and packer detection from the PE header. Nothing suspicious here — entropy is within the normal range for unpacked code.
How widely this file has been seen
Moderate prevalence — neither rare nor common. No strong prior applies.
Forensic fingerprint
- File name
- Autorun.exe
- Size
- 148.0 KB
- MIME type
- (unknown)
- Detected type
- Win32 EXE
- SHA-256
- 49f7592d9d485e50228c6f331f19b124867fccbb4a0f0a9b1e825b99e1036fc4
- MD5
- 3dac169b9b00c36d80d3a49950200a9e
- SHA-1
- 4e925443d5fc9a7bbfc3228d592ba2f4d635f229
- PE imphash
- 76ec6d89a66b6873706261df5d4d7225
- First seen (VT)
- 5/30/2009, 5:02:38 PM
- Last analysis (VT)
- 1/17/2026, 9:01:10 PM
- First scan (MalwareTips)
- 7/19/2026, 8:21:01 AM
- Last scan (MalwareTips)
- 7/19/2026, 8:21:01 AM
- Community reputation
- +2trusted
Safety FAQ
Common questions about Autorun.exe, answered from the scan data above.
- Autorun.exe appears safe. 74 of 75 antivirus engines report it clean, with only 1 low-confidence detection that read as false positives. As a habit, only run files you downloaded from the official source, since attackers sometimes distribute trojanised copies of legitimate software under the same name.
- Autorun.exe is a Windows executable program, about 148 KB. Our analysis found no threat indicators for it. A file's name can be reused by different files, so we identify it by its cryptographic hash (below).
- 1 of 75 antivirus engines flagged Autorun.exe, 1 of them as outright malicious. A small number of detections can include false positives, so we weigh which engines flagged it and what else the file does, not just the raw count.
- The SHA-256 hash of Autorun.exe is 49f7592d9d485e50228c6f331f19b124867fccbb4a0f0a9b1e825b99e1036fc4, and its MD5 is 3dac169b9b00c36d80d3a49950200a9e. This hash is the file's unique fingerprint — two files with the same SHA-256 are identical. Use it to confirm you're looking at exactly this file (not just one with the same name) when comparing against antivirus databases or a download's published checksum.
- Based on this scan, yes — Autorun.exe shows no threat indicators. The important caveat is source: make sure you downloaded it from the official website or a trusted store, because attackers sometimes distribute malware-laced copies under a legitimate file's name. If your own antivirus flags it while we report it clean, that is most often a false positive, but verify the source before overriding your antivirus.
- This report reflects the scan run on July 19, 2026. Because a file's hash never changes, the identity of Autorun.exe is fixed — but antivirus coverage improves over time, so a file that looks clean today can pick up detections later (and vice-versa). If you need the latest picture, MalwareTips staff can re-run the analysis from scratch.
Reviews & malware reports(0)
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