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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 www.thanksoft.com and multiple other hosts.
Publisher:
Thanksoft  (signed and verified)

MD5:
7c1514ffdd02ceaefe5fb0393e2d806e

SHA-1:
3e9e4a49c236294ec46d069ebf432634975d25a5

SHA-256:
0fb13985a3f1882b100aedd24c7e36f382c409cbe1dcfee8c5ba3750ad79f7df

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:
5/14/2024 8:50:42 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Thanksof.Installer (M)
16.4.7.20

File size:
5.4 MB (5,640,448 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\downloads\masksurf_setup.exe

Digital Signature
Signed by:
Thanksoft

Authority:
VeriSign, Inc.

Valid from:
4/15/2015 2:00:00 AM

Valid to:
4/15/2016 1:59:59 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 6:40:17 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
98304:ZafK4F7WiFtb3vc19c4gwlui3auE7kn4S03c7ixjbN2GvZix6CxGsIKOrpR2P:kC4F7W8tTa9c4gwgRuEgnF0MGXoGvZib

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 3 URLs.

http://www.thanksoft.com/downloads/.../masksurf_setup.exe

http://software-files-a.cnet.com/s/software/13/80/90/.../masksurf_setup.exe

http://dl.cdn.chip.de/downloads/.../masksurf_setup.exe

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