Malicious
Unsigned ZIP posing as Chrome setup flagged as Win64 trojan by 5 tier-1 engines with family consensus and YARA evasion rules.
87c8bdb0e3dbddd586…276454ee01The 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.
This new, unsigned ZIP file mimics a Chrome installer but triggers strong signals from tier-1 engines agreeing on 'win64' family. Kaspersky's EtwTamper detection points to event tracing evasion, common in trojans. Yaraify's 7 rule hits reinforce malware-like static features despite some generic nature. Lack of signing, zero reputation, and rare prevalence outweigh clean reports from other engines. No runtime data exists, but detection consensus drives the malicious call.
Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.
tier1FamilyConsensus: family='win64', agreeingEngines=3, strong=true
Yaraify rules: 'pe_detect_tls_callbacks', 'DebuggerCheck__API', 'golang_bin_JCorn_CSC846'
ESET-NOD32: 'Win64/Agent.DML.gen trojan' (tier1), Kaspersky: 'UDS:Trojan.Win32.EtwTamper.ajb' (tier1)
unsigned, no signerStats.found, prevalence 'rare_new' (1 submitter)
- No malicious contacted hosts
- No dropped children detected
- 12 tier-1 engines clean (possible FP hedge)
- 5 tier-1 malicious detections
- Tier-1 consensus on 'win64' family
- Yaraify 7 rule matches (evasion traits)
- Unsigned with no publisher history
- Rare new file (1 submission, 0 days old)
- Fake Chrome installer filename
Quarantine and delete this file immediately. Run a full system scan and avoid executing untrusted installers.
Threat context
How trojans work
A trojan disguises itself as something useful or harmless to trick you into running it. Once open, it does its real job in the background — anything from stealing data to opening a back door or downloading more malware.
Bottom line:The disguise is the whole trick, so a trustworthy-looking name or icon means nothing.
What to do now
This file is dangerous. Treat it as harmful and remove it.
Don't open or run this file. Delete it from your Downloads (or wherever you saved it), then empty the Recycle Bin.
If you already opened it, disconnect from the internet and run a full scan with your antivirus — Windows Security, built into Windows, is sufficient.
If you typed any passwords while it was open, change them from a device you trust.
In future, only download software from the official website or an official app store.
misc corroborated by 2 sources
- 7 YARA rulesDebuggerCheck__API, golang_bin_JCorn_CSC846, mht_inside_word
- VT (75 engines)misc
1 corroborating signal from researcher-curated sources
- DebuggerCheck__API
- golang_bin_JCorn_CSC846by Justin CornwellCSC-846 Golang detection ruleset
- mht_inside_wordby dPhishDetect embedded mht files inside microsfot word.
- pe_detect_tls_callbacks
- RIPEMD160_Constantsby phoul (@phoul)Look for RIPEMD-160 constants
YARA & heuristic rule matches
A researcher-curated or high-severity heuristic rule matched this sample. These rules target specific malware families and are near-definitive.
- DebuggerCheck__API
- golang_bin_JCorn_CSC846
- mht_inside_word
- pe_detect_tls_callbacks
- RIPEMD160_Constants
15 detections across 75 engines
How widely this file has been seen
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.
Forensic fingerprint
- File name
- x64-Chrome_Setup-886301.zip
- Size
- 17.66 MB
- MIME type
- application/x-zip-compressed
- Detected type
- ZIP
- SHA-256
- 87c8bdb0e3dbddd58680a5e97fd15600884a3d344cac212a96229e276454ee01
- MD5
- dc04e47a448abad08acbefa7fce1a6aa
- SHA-1
- dfa45e510fa41a5cd9058c67cc44b59ef96a6d5e
- First seen (VT)
- 4/30/2026, 3:09:52 AM
- Last analysis (VT)
- 4/30/2026, 3:09:52 AM
- First scan (MalwareTips)
- 4/30/2026, 3:10:50 AM
- Last scan (MalwareTips)
- 4/30/2026, 3:10:49 AM
Safety FAQ
Common questions about x64-Chrome_Setup-886301.zip, answered from the scan data above.
- Yes — x64-Chrome_Setup-886301.zip is malicious, so do not run it, and delete it. 15 of 75 antivirus engines flag it. It behaves as a trojan — malware disguised as something harmless to trick you into running it. If you've already run it, see the removal and recovery steps below.
- x64-Chrome_Setup-886301.zip is a software installer (application/x-zip-compressed), about 17.7 MB. Our analysis identifies it as malicious — a trojan — malware disguised as something harmless to trick you into running it. Because a file's name and icon can be faked, the safest way to identify it is by its cryptographic hash (below), not its filename.
- 15 of 75 antivirus engines flagged x64-Chrome_Setup-886301.zip, 15 of them as outright malicious. A detection rate at this level is a reliable signal that the file is dangerous.
- Act quickly. 1) Disconnect the device from the internet to stop the malware communicating or spreading. 2) Run a full scan with reputable anti-malware software (such as Malwarebytes) and quarantine everything it finds. 3) Change your important passwords from a DIFFERENT, clean device — many threats log keystrokes or steal saved credentials. 4) If you bank or shop on this device, watch closely for fraud and alert your bank. 5) For a confirmed infection, the most reliable fix is to back up your personal files and reinstall the operating system for a clean start.
- To remove x64-Chrome_Setup-886301.zip: 1) restart into Safe Mode (Safe Mode with Networking if you need to download a tool) so the malware doesn't auto-start. 2) Run a full scan with reputable anti-malware software and let it quarantine or delete the detections. 3) Delete the original x64-Chrome_Setup-886301.zip file and empty the Recycle Bin/Trash. 4) Check your browser extensions, startup items, and scheduled tasks for anything unfamiliar. 5) Reboot and scan again to confirm it's gone. If detections keep coming back, a clean operating-system reinstall is the most dependable cure.
- x64-Chrome_Setup-886301.zip is classified as a trojan — malware disguised as something harmless to trick you into running it. Knowing the family matters because it tells you the likely impact — data theft, remote control, file encryption, or unwanted ads — and guides the cleanup.
- The SHA-256 hash of x64-Chrome_Setup-886301.zip is 87c8bdb0e3dbddd58680a5e97fd15600884a3d344cac212a96229e276454ee01, and its MD5 is dc04e47a448abad08acbefa7fce1a6aa. 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.
- This report reflects the scan run on April 30, 2026. Because a file's hash never changes, the identity of x64-Chrome_Setup-886301.zip 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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