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masksurf_setup.exe

Thanksoft

The application masksurf_setup.exe by Thanksoft has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. The file has been seen being downloaded from files.downloadnow.com.
Publisher:
Thanksoft  (signed and verified)

MD5:
27a2de2872385f87d075141a680bff41

SHA-1:
53361d06283bcddb026d7160f59e64edc2d91e7d

Scanner detections:
1 / 68

Status:
Potentially unwanted

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Analysis date:
5/8/2024 2:19:39 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Thanksof.Installer (M)
16.3.13.19

File size:
5.4 MB (5,639,168 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\Documents and Settings\{user}\My documents\downloads\masksurf_setup.exe

Digital Signature
Signed by:
Thanksoft

Authority:
VeriSign, Inc.

Valid from:
4/15/2015 4:00:00 AM

Valid to:
4/15/2016 3:59:59 AM

Subject:
CN=Thanksoft, O=Thanksoft, L=Dnepropetrovsk, S=Dnepropetrovsk, C=UA

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
3B50069E945D4934FDF6546BCA6CCF5A

File PE Metadata
Compilation timestamp:
10/7/2014 8:40:17 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
98304:Zjin4V5/Xbp2MRD6xlCaXabg1NqaiG7d3SRdbHVTk7UCOXhjiGH0BSs5BaEcVm:amnPRmXCRbra/7d3Sj1+UCOTH0F58G

Entry address:
0x3217

Entry point:
81, EC, 84, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 89, 5C, 24, 20, C6, 44, 24, 14, 20, FF, 15, 34, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 8C, 72, 40, 00, 6A, 09, A3, B8, 37, 42, 00, E8, C0, 2D, 00, 00, A3, 04, 37, 42, 00, 53, 8D, 44, 24, 38, 68, 60, 01, 00, 00, 50, 53, 68, B8, EC, 41, 00, FF, 15, 64, 71, 40, 00, 68, E4, 91, 40, 00, 68, 00, 2F, 42, 00, E8, 6A, 2A, 00, 00, FF, 15, B0, 70, 40, 00, BD, 00, 90, 42, 00, 50, 55, E8, 58, 2A...
 
[+]

Entropy:
7.9991

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file masksurf_setup.exe has been seen being distributed by the following URL.

http://files.downloadnow.com/s/software/14/50/29/.../masksurf_setup.exe

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