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ext_1.exe

Yuanyuan Zhang

The application ext_1.exe by Yuanyuan Zhang has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat.
Publisher:
Yuanyuan Zhang  (signed and verified)

MD5:
8d3305b2436f8d4a0a2079b2149465e0

SHA-1:
9ea0458f909b066e52379648b6cebcf33031f320

SHA-256:
c736d1acffaefd8e4afe48a269651b151fe464b341e49bc989367c2ac9b6c30f

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
4/10/2026 10:06:36 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Mutahba (M)
17.1.23.15

File size:
415.5 KB (425,440 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\local\temp\ext_1.exe

Digital Signature
Signed by:
Yuanyuan Zhang

Authority:
thawte, Inc.

Valid from:
10/11/2016 4:00:00 AM

Valid to:
4/21/2017 3:59:59 AM

Subject:
CN=Yuanyuan Zhang, OU=Individual Developer, O=No Organization Affiliation, L=Beijing, S=Beijing, C=CN

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
173289734913F0DE2C937F585965970D

File PE Metadata
Compilation timestamp:
10/12/2016 3:51:55 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

Entry address:
0x291E

Entry point:
E8, 57, F2, FF, FF, E9, 70, 9F, 00, 00, 55, 8B, EC, 81, EC, 94, 06, 00, 00, A1, 18, 40, 46, 00, 33, C5, 89, 45, FC, 53, 56, 57, 6A, 40, 8B, D9, 33, FF, 5A, 89, 9D, 70, F9, FF, FF, 8B, F7, E8, 40, 8A, 00, 00, 85, C0, 75, 34, 68, 1E, 02, 00, 00, 66, 89, 85, DC, FD, FF, FF, 8D, 85, DE, FD, FF, FF, 57, 50, E8, 81, C6, 00, 00, 83, C4, 0C, 8D, 85, DC, FD, FF, FF, 57, 50, 68, 14, 26, 46, 00, FF, 15, 18, D0, 45, 00, E9, 11, 03, 00, 00, 8B, 4B, 3C, 8D, 91, F8, 00, 00, 00, E8, FA, 89, 00, 00, 85, C0, 0F, 84, FB, 02...
 
[+]

Entropy:
7.8107  (probably packed)

Code size:
366 KB (374,784 bytes)

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