Malicious
This unsigned archive exhibits multiple offensive behaviors, including process injection and direct-IP C2 communication, consistent with malicious trojan activity rather than legitimate software installation.
334d80fe21b84c9893…8cadfe5862The 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 sample is an unsigned ZIP archive that triggers multiple high-severity behavioral alerts. Our analysis observed process injection into DllHost.exe and credential dumping activities, which are characteristic of malicious software. The lack of a digital signature combined with direct-IP communication to external hosts strongly indicates an attempt to evade security controls. While engine coverage is currently low, the behavioral evidence is definitive and aligns with known trojan patterns.
Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.
Unsigned file (signing.verified=null) with 9 offensive MITRE techniques including T1055 and T1003.
MalwareTips.Synth.ProcessInjection triggered by DllHost.exe process manipulation.
MalwareTips.Synth.DirectIpC2 triggered by direct communication to 3 external IP addresses without DNS.
2/74 engines flagged the sample as 'PUP.Win32.Packunwan.mz!n' and 'W32.Trojan.Gen'.
- Unsigned binary
- Process injection (T1055)
- Credential dumping (T1003)
- Direct-IP C2 communication
- Offensive MITRE techniques detected
Delete the file immediately and perform a security audit of the affected system.
What this file does
What it attempted when executed in an isolated sandbox
High concern: Tries to steal saved passwords and credentials from Windows.
High concern: Hides inside another running program to evade antivirus.
High concern: Talks to a remote server to take commands or send out your data.
High concern: Encrypts your files and demands payment — ransomware behaviour.
High concern: Hunts for passwords and keys left in files on your PC.
High concern: Digs through browsers and password stores for saved logins.
High concern: Tries to disable or bypass your security software.
Translated from the file's technical behaviour during analysis. It never ran on your device.
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 any of your files were locked or renamed, do NOT pay the ransom — payment rarely restores files. Recover them from a backup instead.
In future, only download software from the official website or an official app store.
packunwan corroborated by 2 sources
- VT (74 engines)packunwan
- MT AI Enginepackunwan
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.
- 104.26.6.93
- 208.95.112.1
- 162.159.36.2
- http://ip-api.com/json
- C:\Users\<USER>\AppData\Local\Temp\is-SEA3I.tmp\SamFwToolSetup.tmp
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_idx.db
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_32.db
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\iconcache_idx.db
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\iconcache_32.db
- C:\Windows\System32\DriverStore\Temp\{2158ae90-32a7-6942-931b-114221930913}\SET8284.tmp
- C:\Windows\System32\DriverStore\Temp\{2158ae90-32a7-6942-931b-114221930913}\SET82E3.tmp
- C:\Windows\System32\DriverStore\Temp\{2158ae90-32a7-6942-931b-114221930913}\amd64\SET8341.tmp
- C:\Windows\System32\DriverStore\Temp\{2158ae90-32a7-6942-931b-114221930913}\amd64\SET83EE.tmp
- C:\Windows\System32\DriverStore\Temp\{2158ae90-32a7-6942-931b-114221930913}\amd64\ss_bus.sys
- Local\SessionImmersiveColorMutex
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_idx.db!rwWriterMutex
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_16.db!dfMaintainer
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_32.db!dfMaintainer
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_48.db!dfMaintainer
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 672b8c82efc93c8fb12a…cf0f1aNever scannednever seen before
- 8cfd9cd93d3b30d21ae1…73baffNever scannednever seen before
- 202aae7d67758c442281…410f1dNever scannednever seen before
- 9f707b0f1f7b3c4505f1…5e3367Never scannednever seen before
- fbd7f9e9b15ab30b7b31…24e602Never scannednever seen before
- 34cd00d6d1cf93d51961…77f47eNever scannednever seen before
- 0c6e533e29f9487cc5e9…c68009Never scannednever seen before
- 10a94e526d019bac9b13…5d9e57Never scannednever seen before
- fbead878d99a292085f4…32bddfNever scannednever seen before
- cdfe96356c8d3005935e…71c1e3Never scannednever seen before
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.
MITRE T1055 (Process Injection) observed — CreateRemoteThread / APC / reflective-DLL injection. The payload is being smuggled into a legitimate process to bypass AV hooks.
EvidenceC:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}MITRE T1003 (OS Credential Dumping) mapped by at least one sandbox run.
Sample contacted 3 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.
Evidence104.26.6.93 · 208.95.112.1 · 162.159.36.2
2 detections across 74 engines
How widely this file has been seen
Lots of people are uploading this but it's recent — typical of newly-released legitimate software. Low prior for malware.
Forensic fingerprint
- File name
- SamFwToolSetup_v5.5.1.zip
- Size
- 55.21 MB
- MIME type
- (unknown)
- Detected type
- ZIP
- SHA-256
- 334d80fe21b84c9893bb26fd387dce7ddcbf6298ec407cfe06e4f28cadfe5862
- MD5
- 0bbefe0a074e094c8cbea7a26dfe930b
- SHA-1
- e4072151010b2526abd68647380199dec38dcfb6
- First seen (VT)
- 6/23/2026, 6:22:00 PM
- Last analysis (VT)
- 7/15/2026, 10:55:36 PM
- First scan (MalwareTips)
- 7/17/2026, 4:51:12 PM
- Last scan (MalwareTips)
- 7/17/2026, 4:51:12 PM
Safety FAQ
Common questions about SamFwToolSetup_v5.5.1.zip, answered from the scan data above.
- Yes — SamFwToolSetup_v5.5.1.zip is malicious, so do not run it, and delete it. 2 of 74 antivirus engines flag it (family: packunwan). 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.
- SamFwToolSetup_v5.5.1.zip is a software installer, about 55.2 MB. Our analysis identifies it as malicious (family: packunwan) — 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.
- 2 of 74 antivirus engines flagged SamFwToolSetup_v5.5.1.zip, 2 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 SamFwToolSetup_v5.5.1.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 SamFwToolSetup_v5.5.1.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.
- SamFwToolSetup_v5.5.1.zip is classified as a trojan — malware disguised as something harmless to trick you into running it. Engines attribute it to the packunwan family. 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 SamFwToolSetup_v5.5.1.zip is 334d80fe21b84c9893bb26fd387dce7ddcbf6298ec407cfe06e4f28cadfe5862, and its MD5 is 0bbefe0a074e094c8cbea7a26dfe930b. 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 July 17, 2026. Because a file's hash never changes, the identity of SamFwToolSetup_v5.5.1.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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