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sto_setup.exe

Yu Bao

The application sto_setup.exe by Yu Bao 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 file has been seen being downloaded from d2xvc2nqkduarq.cloudfront.net and multiple other hosts.
Publisher:
Yu Bao  (signed and verified)

Version:
20160112173711

MD5:
6b03b8bb78b3423fe7a87e97758f3625

SHA-1:
9525e00a568430d6dc0eadd11a8d7f2d8d5254d9

SHA-256:
1c826111db5e27f838f91f592e15532706af9ea3fc9134a892492ac9bb3e5498

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
12/24/2024 11:57:39 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.YuBao.Installer (M)
16.1.15.3

File size:
1.4 MB (1,481,912 bytes)

Product version:
20160112173711

Copyright:
Copyright 2015 Rafotech. All rights reserved

File type:
Executable application (Win32 EXE)

Language:
English (United States)

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

Digital Signature
Signed by:
Yu Bao

Authority:
thawte, Inc.

Valid from:
10/21/2015 7:00:00 AM

Valid to:
10/21/2016 6:59:59 AM

Subject:
CN=Yu Bao, 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:
17C6AE891D357C16ADC447794EA40FC5

File PE Metadata
Compilation timestamp:
1/12/2016 4:37:34 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
24576:wCtliI+uSxv3Jhy5HpArcknr1E4HKbLK2Tpf0pK6ml61iC:BH2/PuHceXDWpK6K61iC

Entry address:
0xE55A1

Entry point:
E8, A4, CC, 00, 00, E9, 7F, FE, FF, FF, CC, CC, CC, CC, CC, 8B, 54, 24, 0C, 8B, 4C, 24, 04, 85, D2, 74, 7F, 0F, B6, 44, 24, 08, 0F, BA, 25, 74, CD, 55, 00, 01, 73, 0D, 8B, 4C, 24, 0C, 57, 8B, 7C, 24, 08, F3, AA, EB, 5D, 8B, 54, 24, 0C, 81, FA, 80, 00, 00, 00, 7C, 0E, 0F, BA, 25, 40, 3B, 55, 00, 01, 0F, 82, BF, D1, 00, 00, 57, 8B, F9, 83, FA, 04, 72, 31, F7, D9, 83, E1, 03, 74, 0C, 2B, D1, 88, 07, 83, C7, 01, 83, E9, 01, 75, F6, 8B, C8, C1, E0, 08, 03, C1, 8B, C8, C1, E0, 10, 03, C1, 8B, CA, 83, E2, 03, C1...
 
[+]

Entropy:
6.7313

Code size:
1 MB (1,077,760 bytes)

The file sto_setup.exe has been seen being distributed by the following 4 URLs.

http://d2xvc2nqkduarq.cloudfront.net/.../obs_setup.exe

http://d2xvc2nqkduarq.cloudfront.net/.../dam_setup.exe

http://ollyfile.me/.../310714_a10.exe

http://d2xvc2nqkduarq.cloudfront.net/.../setup.exe

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