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ruhasis.exe

Tab Station

yearsoft

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application ruhasis.exe, “Tab Station Apply” by yearsoft has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat.
Publisher:
tabstation  (signed by yearsoft)

Product:
Tab Station

Description:
Tab Station Apply

Version:
1.2.1.4

MD5:
c54c018aa82e29cf1397bb661a3314c1

SHA-1:
161c17decd0d417c1f73102995029f613f05992b

SHA-256:
0b861514e9870a7552ee9c8648ef928d0a4cd43775b256df9b10171dd11457f7

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:
5/5/2024 3:49:25 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.yearsoft (M)
16.7.2.17

File size:
16.1 KB (16,440 bytes)

Product version:
1.2.1.4

Copyright:
tabstation

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\roaming\ruhasi\ruhasis.exe

Digital Signature
Signed by:
yearsoft

Authority:
Thawte, Inc.

Valid from:
7/17/2013 9:00:00 AM

Valid to:
7/18/2014 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:
028FB214E3C57F518427378946E58BA7

File PE Metadata
Compilation timestamp:
8/26/2013 3:33:01 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
10.0

CTPH (ssdeep):
384:p1cBlX3MJHRCyar+6SH1VThInwuSuSPLDq1r:k8JHQPrlSjVIwuiq1r

Entry address:
0x1A71

Entry point:
E8, 83, 04, 00, 00, E9, B3, FD, FF, FF, 8B, FF, 55, 8B, EC, 81, EC, 28, 03, 00, 00, A3, 40, 31, 40, 00, 89, 0D, 3C, 31, 40, 00, 89, 15, 38, 31, 40, 00, 89, 1D, 34, 31, 40, 00, 89, 35, 30, 31, 40, 00, 89, 3D, 2C, 31, 40, 00, 66, 8C, 15, 58, 31, 40, 00, 66, 8C, 0D, 4C, 31, 40, 00, 66, 8C, 1D, 28, 31, 40, 00, 66, 8C, 05, 24, 31, 40, 00, 66, 8C, 25, 20, 31, 40, 00, 66, 8C, 2D, 1C, 31, 40, 00, 9C, 8F, 05, 50, 31, 40, 00, 8B, 45, 00, A3, 44, 31, 40, 00, 8B, 45, 04, A3, 48, 31, 40, 00, 8D, 45, 08, A3, 54, 31, 40...
 
[+]

Entropy:
6.4361

Code size:
4 KB (4,096 bytes)

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