Our call: Is RabbitFXFixer.exe safe?Suspicious
This unsigned executable exhibits high entropy and direct-IP communication, triggering heuristic alerts from multiple engines without reaching a definitive consensus on its malicious nature.
- 4 of 74 antivirus engines flagged the file, including APEX and Bkav.Observed · Antivirus analysis
- The hash has been submitted 43 times from 38 sources.Derived · Saved report facts
a1aa5379224f33d717…8999b4e6e9Recommended next actions
Before running
Do not run it until the source and publisher can be verified independently.
If you already ran it
Stop using it, scan the device, and watch for unexpected behavior or security alerts. Get a fresh copy from the developer's official site or an official app store.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete4 of 74 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial2 runtime contacts were observed without a completed reputation cross-check.
YARA
Complete1 signature or behavior rule matched.
External intel
Complete3 of 3 independent reference sources completed.
Attack story
Runtime observations grouped by analysis stage. Arrows organize the stages; they do not claim chronology or causality.
Input file
The submitted object
- FileObserved
RabbitFXFixer.exe
a1aa5379224f33d7173bd914bac6dda2ee9f697450b8d62854ec078999b4e6e9
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\<USER>\Desktop\RabbitFXFixer.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
%SAMPLEPATH%\RabbitFXFixer.exe
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
VCRUNTIME140.dll
C:\Users\<USER>\AppData\Local\Temp\_MEI56922\VCRUNTIME140.dll
04Isolated runtime analysis - Written fileObserved
_bz2.pyd
C:\Users\<USER>\AppData\Local\Temp\_MEI56922\_bz2.pyd
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
20.99.133.109
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
151.101.22.172
Contact observed during runtime.
07Isolated runtime analysis - +1 more recorded observation in Analyst mode
7 recorded facts from one runtime window. Every fact remains independently traceable in Analyst mode.
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
4 of 74 antivirus engines flagged the file, including APEX and Bkav.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The hash has been submitted 43 times from 38 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 03
Scanned file: RabbitFXFixer.exe — a1aa5379224f33d7173bd914bac6dda2ee9f697450b8d62854ec078999b4e6e9
ProvenanceObservedSourceUploaded fileObserved at - 04
Observed process — "C:\Users\<USER>\Desktop\RabbitFXFixer.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 05
Observed process — %SAMPLEPATH%\RabbitFXFixer.exe
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
File written: VCRUNTIME140.dll — C:\Users\<USER>\AppData\Local\Temp\_MEI56922\VCRUNTIME140.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: _bz2.pyd — C:\Users\<USER>\AppData\Local\Temp\_MEI56922\_bz2.pyd
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
Contacted host: 20.99.133.109 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 151.101.22.172 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at
Intelligence
The saved assessment, checked against the scan evidence and recorded coverage.
The reasoning behind this verdict
This section explains the evidence supporting the verdict and keeps conflicting or missing signals visible.
The file is unsigned and shows high entropy, which is often associated with obfuscation. While 4 of 74 engines flagged it as a potential dropper or trojan, the lack of tier-1 consensus and the absence of confirmed malicious behavior in the sandbox make this a suspicious, but not definitively malicious, sample.
Our analysis identifies this file as suspicious due to its unsigned status and high entropy, which are common indicators of obfuscation. While 4 of 74 engines flagged the file, none of the tier-1 engines provided a consensus, suggesting the detections are likely heuristic. The sandbox observed direct-IP communication, which triggered a medium-severity heuristic alert. Given the lack of confirmed malicious activity and the absence of a trusted signature, we cannot verify the file's integrity. Users should exercise caution and maintain active endpoint protection.
What We Detected
The file RabbitFXFixer.exe is an unsigned 64-bit Windows executable. Our analysis shows 4 of 74 engines flagged the file as malicious, with labels including 'Trojan' and 'Dropper'. No tier-1 engines provided a consensus, and the file lacks a valid digital signature.
Threat Behavior
The file exhibits high entropy (7.99), which is often used to hide code structure. During sandbox execution, the file performed direct-IP communication to external addresses (20.99.133.109 and 151.101.22.172). While no offensive MITRE techniques were confirmed, the presence of virtualization evasion techniques (T1497.001) and obfuscation (T1027) warrants caution.
What To Do Now
Do not execute this file if it was obtained from an untrusted source. Ensure your endpoint protection software is fully updated and active. If you must use this software, verify its origin directly with the developer's official website.
Where this verdict could be wrong3 caveats
- The majority of engines (70/74) did not detect any malicious activity, suggesting the detections may be heuristic-based rather than signature-based.
- No malicious children were dropped during the 10-file inspection, which contradicts typical dropper behavior.
- The lack of a malicious sandbox verdict suggests the file did not exhibit overt malicious actions during the observation period.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- no malicious children dropped
- no offensive MITRE techniques observed
- no malicious sandbox verdict
- unsigned executable
- high entropy (7.99)
- direct-IP communication
- heuristic detections by 4 engines
- virtualization evasion techniques
Treat this file as suspicious. Do not run it unless you can verify its source and integrity through official channels.
Behavior
Plain-English impact first, then the observed runtime evidence.
What this file does
Observed actions and their security significance
Moderate concern: Contained obfuscated or packed code that makes inspection harder.
Moderate concern: Runs hidden system commands (script or shell).
Moderate concern: Removed execution artefacts or logs, which can conceal activity.
Moderate concern: Communicated over a common application protocol; malware can use this for command-and-control.
Moderate concern: Scans through your files and folders.
Moderate concern: Checked the environment for virtualisation or analysis tools.
Note: Listed running processes; both legitimate software and malware may do this.
These are observed capabilities from an isolated analysis. A technique does not prove malicious intent on its own, and the file never ran on your device.
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.
- 20.99.133.109
- 151.101.22.172
- C:\Users\<USER>\AppData\Local\Temp\_MEI56922\VCRUNTIME140.dll
- C:\Users\<USER>\AppData\Local\Temp\_MEI56922\_bz2.pyd
- C:\Users\<USER>\AppData\Local\Temp\_MEI56922\_decimal.pyd
- C:\Users\<USER>\AppData\Local\Temp\_MEI56922\_hashlib.pyd
- C:\Users\<USER>\AppData\Local\Temp\_MEI56922\_lzma.pyd
- \Sessions\1\BaseNamedObjects\Local\SessionImmersiveColorMutex
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- d045a72c3e4d21165e93…a310e8Never scannednever seen before
- eb8fe2778c54213aa2cc…588e74Never scannednever seen before
- 8eccaba9321df69182ee…7395aeNever scannednever seen before
- e7c98d99198d8a96775d…0cf583Never scannednever seen before
- 39e363c47d4d45beda15…76453cNever scannednever seen before
- 05fe080eab7fc535c51e…3f99deNever scannednever seen before
- 91d7a4c39baac78c595f…dcd42cNever scannednever seen before
- 87dd0c858620287454fd…00d766Never scannednever seen before
- 6e6bfdc656f0cf22fabb…e57ab2Never scannednever seen before
- 980a63f2b39cf16910f4…7d4278Never scannednever seen before
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
Detection sources at a glance
Category: generic-trojan
MalwareBazaar, YARAify, and CIRCL hashlookup completed and returned no entries for this hash.
Signatures and behavior heuristics
Behavioral heuristics matched patterns associated with malware. Corroborating evidence determines how much weight they carry.
The sample contacted an external IP address directly and no application domain was recorded. Direct-IP traffic also occurs in legitimate installers and infrastructure, so this is supporting context only and requires corroboration from host reputation and other runtime evidence.
Evidence20.99.133.109 · 151.101.22.172
4 of 74 engines flagged this file
View all 74 engine results
Section entropy & packers
No high-entropy executable section or known packer signature was detected. Data and resource sections can still have high entropy without indicating packed code.
How widely this file has been seen
Moderate prevalence — neither rare nor common. No strong prior applies.
Fingerprint and provenance
- File name
- RabbitFXFixer.exe
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 7.5 MB
- Last analyzed
- Jul 28, 2026, 11:27 PM UTC
a1aa5379224f33d7173bd914bac6dda2ee9f697450b8d62854ec078999b4e6e9Safety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
We couldn't fully clear this file. Treat it with caution.
Don't run it unless you're certain it came from a source you trust.
Check where you got it — an unexpected attachment or a random download link is a red flag.
If its origin cannot be confirmed, delete this file and use a fresh copy from a trusted source. Get a fresh copy from the developer's official site or an official app store.
If you're still unsure, scan it again in a day or two — detections often catch up on newer files.