MalwareTips
File verdict·Decided by the MT AI Engine
Our call

Safe

Clean .bat file with zero engine detections and no malicious indicators.

Trust score85High trust
MT AI confidence · 82%
Hotfix.bat
110 B
91b9a29779574aa7dc…b166270703
Antivirus engines
0 of 75 flagged
Code signing
Unsigned
Age
First seen 12 days ago
MT AI Engine · our arbiter

The verdict, reasoned out.

Not a rules engine. The MT AI Engine reads every signal we collected, weighs them against history, and commits to an answer.

82%Confidence
High
Reasoning

The complete absence of malicious flags from every engine tier, combined with clean sandbox and external-intel results, outweighs the file's rarity. Ambient MITRE techniques are consistent with ordinary batch scripting. No adversarial filename or other red flags exist.

Key signals · 3

Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.

  1. engines.malicious=0 and tier1Malicious=0 with 17 tier1 clean reports

  2. behaviour.hasMaliciousSandboxVerdict=false and offensiveTechniques=[]

  3. prevalence.classification=rare_new but externalIntel.yaraify.ruleCount=0 and no CIRCL hit

Points in its favour
  • Zero detections from tier-1 engines
  • No malicious sandbox verdict
What to do

Treat as safe; no further action required.

Runtime behaviour

What this file did when executed

This file was detonated in 1 sandbox and its runtime behaviour was observed.

MITRE ATT&CK
4

Adversary techniques mapped to the MITRE ATT&CK framework.

T1033T1064T1082T1202
Spawned processes
8
$(unnamed)
"C:\Windows\system32\cmd.exe" /c start /wait "" "C:\Users\<USER>\Desktop\EFI.bat"
$(unnamed)
C:\Windows\system32\cmd.exe /K "C:\Users\<USER>\Desktop\EFI.bat"
$(unnamed)
mountvol S: /s
$(unnamed)
mountvol S: /d
$(unnamed)
C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe /c ""C:\Users\user\Desktop\EFI.bat" "
$(unnamed)
C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
$(unnamed)
C:\Windows\System32\mountvol.exe mountvol S: /s
$(unnamed)
C:\Windows\System32\mountvol.exe mountvol S: /d
Filesystem & mutexes
1
Files written1
  • \Device\ConDrv\\Connect
No researcher-database hits
External threat-intel sources were not collected for this scan.
Antivirus engine breakdown

0 detections across 75 engines

0 malicious0 suspicious75 clean
Tier-117 engines
0flag
Top commercial AVs (low FP rate)
Tier-238 engines
0flag
Mainstream engines with mixed FP rates
Low-trust20 engines
0flag
Heuristic / generic-AI engines (high FP rate)
All 75 engines report this file as clean.
Hash 91b9a2977957… cross-referenced against 75 AV engines via our AV network.
Prevalence

How often this file shows up in the wild

Barely seen in the wild and first surfaced recently. This is the footprint of targeted malware the AV industry hasn't signatured yet — extra scrutiny is warranted.

Rare & new
Unique uploaders
2
Very few people have ever uploaded this — rare.
Total submissions
2
Includes repeat uploads by the same source.
First seen by VT
12d ago
Jun 3, 2026
Prevalence quadrant
here
Rare · New
Targeted malware lives here
Common · New
Just-released software
Rare · Old
Niche or internal tooling
Common · Old
Trusted legitimate binaries
File identity

Forensic fingerprint

File biography
First seen (VT)
6/3/2026, 1:56:45 AM
First seen (MalwareBazaar)
—
Last analysis (VT)
6/3/2026, 2:42:39 PM
Scanned here
6/4/2026, 11:57:57 AM
File name
Hotfix.bat
Size
110 B
MIME type
(unknown)
Detected type
Text
SHA-256
91b9a29779574aa7dc2eeb22619089081c17bd2baff073bfd1e375b166270703
MD5
c6dea2838bd12cecc5980a708b4ba718
SHA-1
23b4dd7f75e392e1db2181646e561505d02c22ad
First seen (VT)
6/3/2026, 1:56:45 AM
Last analysis (VT)
6/3/2026, 2:42:39 PM
First scan (MalwareTips)
6/4/2026, 11:57:57 AM
Last scan (MalwareTips)
6/4/2026, 11:57:57 AM
Behavior tags
textidle
Community classification

Reviews & malware reports(0)

Tell the community what you saw. Tag the sample — Trojan, Adware, False Positive — and share what the file did on your system. Your report helps confirm or dispute the AV verdict.

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Scanned by
harlan4096Staff
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