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sammyv.exe

Sub Shop Application

yearsoft

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application sammyv.exe by yearsoft has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a windows Service named “SubShop”.
Publisher:
yearsoft  (signed and verified)

Product:
Sub Shop Application

Version:
1.0.0.2

MD5:
3623be3e0c8d0cb0afc27b93a6d7fe32

SHA-1:
28e3ac4f752fbaf79f87c55117b0392cfb8fe99a

SHA-256:
2ab526a714448af7aeceb7fc301a22ba5336d2e6007565ee93761b24c2fb88e3

Scanner detections:
1 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/25/2024 12:53:56 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.yearsoft (M)
16.2.14.19

File size:
296.5 KB (303,648 bytes)

Product version:
1.1.1.0

Copyright:
Copyright (C) 2013

Original file name:
Sub Shop

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\roaming\sammy\sammyv.exe

Digital Signature
Signed by:
yearsoft

Authority:
Thawte, Inc.

Valid from:
6/21/2013 9:00:00 AM

Valid to:
6/22/2014 8:59:59 AM

Subject:
CN=yearsoft, OU=IT Team, O=yearsoft, L=Ansan-si, S=Gyeonggi-do, C=KR

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

Serial number:
1D640099747B7B0113E4E8A226D9C798

File PE Metadata
Compilation timestamp:
11/22/2013 9:17:38 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
11.0

CTPH (ssdeep):
3072:3dmfOx8G1vcZLs2jlP+S1rECYS+/NNdMDQoQQXbhjxqf6lGN82e6pndBZ+Hx9pPY:3kOx8G1EyOF1wrH6Zjhj2B8MsHKv6CP

Entry address:
0x2F5B

Entry point:
E8, 51, 04, 00, 00, E9, 91, FE, FF, FF, CC, FF, 25, 6C, 41, 40, 00, FF, 25, 68, 41, 40, 00, 55, 8B, EC, FF, 15, 80, 40, 40, 00, 6A, 01, A3, DC, 64, 40, 00, E8, 3B, 05, 00, 00, FF, 75, 08, E8, 39, 05, 00, 00, 83, 3D, DC, 64, 40, 00, 00, 59, 59, 75, 08, 6A, 01, E8, 21, 05, 00, 00, 59, 68, 09, 04, 00, C0, E8, 22, 05, 00, 00, 59, 5D, C3, 55, 8B, EC, 81, EC, 24, 03, 00, 00, 6A, 17, E8, 33, 05, 00, 00, 85, C0, 74, 05, 6A, 02, 59, CD, 29, A3, C0, 62, 40, 00, 89, 0D, BC, 62, 40, 00, 89, 15, B8, 62, 40, 00, 89, 1D...
 
[+]

Entropy:
6.5589

Code size:
11 KB (11,264 bytes)

Service
Display name:
SubShop

Service name:
sammyv

Type:
Win32OwnProcess, InteractiveProcess


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