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

Safe

Portable Nilesoft Shell ZIP scans clean across all engines, with behavior consistent with self-extracting utilities despite heuristic flags.

Trust score90High trust
MT AI confidence · 92%
Shell (Nilesoft) 1.9.18-portable.zip
999.8 KB
8aa0b9c90e88ccce92…7dda43e246
Antivirus engines
0 of 76 flagged
Code signing
Unsigned
Age
First seen 2y 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.

92%Confidence
Very high
Reasoning

This ZIP contains Nilesoft Shell portable, a command-line utility, matching filename and extraction behavior. Zero malicious flags from high-coverage scans provide strong clean signal. Heuristics on process injection and direct IP are triggered by legitimate rundll32 DLL execution and Google server contact. Anti-analysis tags exist but are common in portable tools. Community concerns noted but contradicted by engines and lack of persistence or C2.

Key signals · 4

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

  1. engines: 0/69 malicious (tier1Total=17 all clean)

  2. prevalence: common_old (413 uniqueSources)

  3. behaviour: contactedIps[0]='173.194.195.94' (Google), no malicious sandbox

  4. triggeredHeuristics[0]: 'MalwareTips.Synth.ProcessInjection' on rundll32 'shell.dll,#1'

Points in its favour
  • 0/69 engine detections
  • 17 tier1 clean reports
  • common_old prevalence (413 sources)
  • No malicious sandbox/dropped children
  • Portable app filename pattern
Points against
  • Process injection heuristic (T1055 via rundll32)
  • Direct IP contact (no DNS)
  • Anti-analysis tags (detect-debug-environment, long-sleeps)
  • Negative reputation (-11)
  • Community malware tags
What to do

Safe for use; this is a legitimate portable command shell from Nilesoft. Download from official sources to confirm integrity.

Runtime behaviour

What this file did when executed

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

MITRE ATT&CK
10

Adversary techniques mapped to the MITRE ATT&CK framework.

T1010T1055T1056T1057T1071T1082T1129T1497T1562.001T1574.002
Spawned processes
7
$(unnamed)
"C:\Windows\system32\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\shell.dll",#1
$(unnamed)
"C:\Users\<USER>\AppData\Local\Temp\shell.exe"
$(unnamed)
"C:\Windows\SysWOW64\unarchiver.exe" "C:\Users\user\Desktop\portable.zip"
$(unnamed)
C:\Windows\SysWOW64\7za.exe "C:\Windows\System32\7za.exe" x -pinfected -y -o"C:\Users\user\AppData\Local\Temp\i5gwwaom.25n" "C:\Users\user\Desktop\portable.zip"
$(unnamed)
C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
$(unnamed)
"C:\Windows\SysWOW64\unarchiver.exe" "C:\Users\user\Desktop\sample.zip"
$(unnamed)
C:\Windows\SysWOW64\7za.exe "C:\Windows\System32\7za.exe" x -pinfected -y -o"C:\Users\user\AppData\Local\Temp\dhmvppcd.am2" "C:\Users\user\Desktop\sample.zip"
Network activity
1
IP addresses1
  • 173.194.195.94
Filesystem & mutexes
15
Files written15
  • C:\Users\user\AppData\Local\Temp\i5gwwaom.25n
  • C:\Users\user\AppData\Local\Temp\i5gwwaom.25n\LICENSE
  • C:\Users\user\AppData\Local\Temp\i5gwwaom.25n\imports
  • C:\Users\user\AppData\Local\Temp\i5gwwaom.25n\imports\develop.nss
  • C:\Users\user\AppData\Local\Temp\i5gwwaom.25n\imports\file-manage.nss
+10 more
Dropped payload

Files this sample writes at runtime

This file drops 10 children at runtime. None are currently flagged malicious in our cache.

10 unseen
  • cda839657acef7ee6381…d02e25Never scanned
    never seen before
  • b1fe8e12eca260077dd5…4613b2Never scanned
    never seen before
  • 548fb2007054b9cf5e90…3fa7a6Never scanned
    never seen before
  • 6aef50956245b6ca8bc5…2c6c2dNever scanned
    never seen before
  • 10f8ecc6ec94c09dbb7c…fac5fbNever scanned
    never seen before
  • 49002ee99142bd8859e1…6a1a43Never scanned
    never seen before
  • 915e178329803bf5805c…a38d74Never scanned
    never seen before
  • a8ff9e371107a443bc10…a6b651Never scanned
    never seen before
  • db3f4b59e677d1adf910…50a3c3Never scanned
    never seen before
  • 4eabac27d4a5323d4fcb…b461b8Never scanned
    never seen before
No researcher-database hits
External threat-intel sources were not collected for this scan.
Signature matches

YARA + heuristic rules that fired

A researcher-curated or high-severity heuristic rule matched this sample. These rules target specific malware families and are near-definitive.

2 synthesis
MITRE ATT&CK profile
Defense evasion× 1C2× 1
MalwareTips synthesis rules
Our heuristics on VT data + sandbox behaviour
  • ProcessInjection
    T1055
    high

    MITRE T1055 (Process Injection) observed — CreateRemoteThread / APC / reflective-DLL injection. The payload is being smuggled into a legitimate process to bypass AV hooks.

    Evidence
    "C:\Windows\system32\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\shell.dll",#1
  • DirectIpC2
    T1071
    medium

    Sample contacted 1 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.

    Evidence
    173.194.195.94
Antivirus engine breakdown

0 detections across 76 engines

0 malicious0 suspicious76 clean
Tier-117 engines
0flag
Top commercial AVs (low FP rate)
Tier-238 engines
0flag
Mainstream engines with mixed FP rates
Low-trust21 engines
0flag
Heuristic / generic-AI engines (high FP rate)
All 76 engines report this file as clean.
Hash 8aa0b9c90e88… cross-referenced against 76 AV engines via our AV network.
Prevalence

How often this file shows up in the wild

Widely seen in the wild for a long time. High prior this is legitimate; isolated detections on common-old files are usually false positives.

Common & old
Unique uploaders
413
Hundreds of people have uploaded this — common.
Total submissions
446
Includes repeat uploads by the same source.
First seen by VT
2y ago
Nov 27, 2024
Prevalence quadrant
Rare · New
Targeted malware lives here
Common · New
Just-released software
Rare · Old
Niche or internal tooling
here
Common · Old
Trusted legitimate binaries
File identity

Forensic fingerprint

File biography
First seen (VT)
11/27/2024, 5:02:51 PM
First seen (MalwareBazaar)
—
Last analysis (VT)
4/20/2026, 8:37:50 AM
Scanned here
4/24/2026, 4:45:39 AM
File name
Shell (Nilesoft) 1.9.18-portable.zip
Size
999.8 KB
MIME type
(unknown)
Detected type
ZIP
SHA-256
8aa0b9c90e88ccce927a88d7126416b9e3d21d91c7748ea5c1cf2b7dda43e246
MD5
340c6f27b75e67172d3aa98e50293ea3
SHA-1
c2ff976f9e6cd5402f7df35fda08c024e20c6a50
First seen (VT)
11/27/2024, 5:02:51 PM
Last analysis (VT)
4/20/2026, 8:37:50 AM
First scan (MalwareTips)
4/24/2026, 4:45:39 AM
Last scan (MalwareTips)
4/24/2026, 4:45:39 AM
Community reputation
-11flagged
Behavior tags
long-sleepscontains-pezipchecks-user-inputdetect-debug-environment
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
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