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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 doc-0k-98-docs.googleusercontent.com and multiple other hosts.
Publisher:
Thanksoft  (signed and verified)

MD5:
c4bf03fedadd12fa2c672fbd50eb8d2f

SHA-1:
50ecbcf77fbb9d5aa4c6622c9a7eee5baa8129ce

SHA-256:
3a48dd3d5d0ea7298789096dd75f76c2df01336a8d97b8b3a918fab36896f754

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:
12/25/2024 7:10:23 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Installer.Thanksoft.O
14.8.31.22

File size:
4.1 MB (4,345,408 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:
1/31/2014 1:00:00 AM

Valid to:
2/1/2015 12:59:59 AM

Subject:
CN=Thanksoft, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Thanksoft, L=Dnepropetrovsk, S=n/a, 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:
6C1556EB6266C79DF482A0471E0F4004

File PE Metadata
Compilation timestamp:
7/6/2011 4:31:20 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
98304:yClen5c2Q/Rgc3l9XAlUQ4OiZ59SoolxnqyFkVh9eNO6PqJQ:yCleq1/qc3b51OsfS7xNyVhYw6kQ

Entry address:
0x354B

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, D8, 84, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, B8, 80, 40, 00, 55, FF, 15, B0, 82, 40, 00, 6A, 08, A3, 98, 06, 47, 00, E8, 67, 27, 00, 00, 55, 68, B4, 02, 00, 00, A3, B0, 05, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 1C, 86, 40, 00, FF, 15, 80, 81, 40, 00, 68, 04, 86, 40, 00, 68, A0, 85, 46, 00, E8, 35, 26, 00, 00, FF, 15, B4, 80, 40, 00, 50, BF, A0, 10, 4C, 00, 57, E8, 23, 26, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
25 KB (25,600 bytes)

The file masksurf_setup.exe has been seen being distributed by the following 6 URLs.

https://doc-0k-98-docs.googleusercontent.com/docs/securesc/ha0ro937gcuc7l7deffksulhg5h7mbp1/s2vjtcr13s71dn6mgv3fd8mqrnmbas6b/1471384800000/08696374077854131578/.../0B7aNbC31jNpCU29DUU5uNDJwanM?e=download

https://drive.google.com/uc?export=download&id=0B7aNbC31jNpCU29DUU5uNDJwanM

http://files.downloadnow.com/s/software/13/80/90/.../masksurf_setup.exe

http://software-files-a.cnet.com/s/software/13/93/88/.../masksurf_setup.exe

&onid=2144&oid=3001-2144_4-10888261&rsid=cbsidownloadcomsite&sl=en&sc=us&topicguid=security/privacy&topicbrcrm=windows software&pid=13809076&mfgid=6278333&merid=6278333&ctype=dm&cval=CBSI&devicetype=desktop&pguid=c3886daa9830475f59b767e7&viewguid=RavlN6WZHBClexg4zVV2HXJsDsZQqjyutrgb&destUrl=http://software-files-a.cnet.com/s/software/13/80/90/.../masksurf_setup.exe

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

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