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zlib1.dll

zlib

UCF

zlib1.dll is the zLib Compression Library used for lossless data-compression and is recompiled by UCF. The module zlib1.dll, “zlib data compression library” by UCF has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. Note, this is a common distributed file and although it has been detected it might not be a threat is un-coupled from its distribution source.
Publisher:
UCF  (signed and verified)

Product:
zlib

Description:
zlib data compression library

Version:
1.2.3

MD5:
4dc5c09aee2a3ce5311b7d545f202c18

SHA-1:
dbcb372613f2f001a941c39338ab2812bba2946d

SHA-256:
ee307a3562bf729671f31dac0fc5a76d4354f1f0704f92af39f97a50b0b91900

Scanner detections:
1 / 68

Status:
Adware

Explanation:
This is the zLib Compression Library used for lossless data-compression. While the file itself is not dangerous, it is part of a program that has been detected.

Analysis date:
4/25/2024 8:10:56 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP (M)
16.10.1.10

File size:
63.5 KB (65,040 bytes)

Product version:
1.2.3

Copyright:
(C) 1995-2004 Jean-loup Gailly & Mark Adler

Original file name:
zlib1.dll

File type:
Dynamic link library (Win32 DLL)

Common path:
C:\Program Files\boancheck\zlib1.dll

Digital Signature
Signed by:
UCF

Authority:
Thawte, Inc.

Valid from:
5/18/2011 8:00:00 AM

Valid to:
5/18/2012 7:59:59 AM

Subject:
CN=UCF, O=UCF, L="Haeundae-gu ", S=BUSAN, C=KR

Issuer:
CN=Thawte Code Signing CA - G2, O="Thawte, Inc.", C=US

Serial number:
0EEDB7F87E47E32E8FA0E92699DC69AD

File PE Metadata
Compilation timestamp:
7/20/2005 5:48:10 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
7.10

CTPH (ssdeep):
1536:H/jUwfZ7BURaHUry7nToIfYIOlIO+CM6mfr:px7BURaHUrgTBfev+CM6Or

Entry address:
0xA146

Entry point:
55, 8B, EC, 53, 8B, 5D, 08, 56, 8B, 75, 0C, 57, 8B, 7D, 10, 85, F6, 75, 09, 83, 3D, 60, 00, 01, 10, 00, EB, 26, 83, FE, 01, 74, 05, 83, FE, 02, 75, 22, A1, 70, 00, 01, 10, 85, C0, 74, 09, 57, 56, 53, FF, D0, 85, C0, 74, 0C, 57, 56, 53, E8, 15, FF, FF, FF, 85, C0, 75, 04, 33, C0, EB, 4E, 57, 56, 53, E8, 54, 00, 00, 00, 83, FE, 01, 89, 45, 0C, 75, 0C, 85, C0, 75, 37, 57, 50, 53, E8, F1, FE, FF, FF, 85, F6, 74, 05, 83, FE, 03, 75, 26, 57, 56, 53, E8, E0, FE, FF, FF, 85, C0, 75, 03, 21, 45, 0C, 83, 7D, 0C, 00...
 
[+]

Entropy:
6.7912

Developed / compiled with:
Microsoft Visual C++ 6.0

Code size:
37 KB (37,888 bytes)

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