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winsta.exe

Polyanskaya Irina

The is the installer for the WebPick InstalleRex download manager which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed without consent. The application winsta.exe by Polyanskaya Irina 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 scheduled task under the Windows Task Scheduler named Convertor triggered daily at a specified time.
Publisher:
Polyanskaya Irina  (signed and verified)

MD5:
2ca9478488ad609b7761ed95a5c5a93d

SHA-1:
23aa33b4609f91c5a4270033319b51f3ac96cfa0

SHA-256:
346652dfa8355d3667b368b9e25e525801749be40b4e523e7ac8f01cc003c5ef

Scanner detections:
1 / 68

Status:
Adware

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 2:21:42 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick (M)
16.9.17.6

File size:
152.6 KB (156,240 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\Program Files\winsta\bin\winsta.exe

Digital Signature
Signed by:
Polyanskaya Irina

Authority:
COMODO CA Limited

Valid from:
8/24/2014 10:00:00 PM

Valid to:
8/25/2015 9:59:59 PM

Subject:
CN=Polyanskaya Irina, O=Polyanskaya Irina, STREET="Suhata Reka, Bl. 225A, Ap. 42", L=Sofia, S=Sofia, PostalCode=1517, C=BG

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
00A4C6F876119E08B1C5FF63372D64B83F

File PE Metadata
Compilation timestamp:
11/25/2014 7:25:09 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
3072:y2/5TZ0jV3us1/XJD7TYKRrWWQZcizrXF:/TZu8s1fJ/TPRaW9arXF

Entry address:
0x90D6

Entry point:
E8, E4, 5A, 00, 00, E9, 89, FE, FF, FF, 8B, FF, 55, 8B, EC, 5D, E9, D2, 07, 00, 00, 3B, 0D, F0, 24, 42, 00, 75, 02, F3, C3, E9, 60, 5B, 00, 00, 8B, FF, 55, 8B, EC, 8B, 45, 08, 56, 8B, F1, C6, 46, 0C, 00, 85, C0, 75, 63, E8, D3, 55, 00, 00, 89, 46, 08, 8B, 48, 6C, 89, 0E, 8B, 48, 68, 89, 4E, 04, 8B, 0E, 3B, 0D, 60, 2C, 42, 00, 74, 12, 8B, 0D, 18, 2A, 42, 00, 85, 48, 70, 75, 07, E8, CB, 65, 00, 00, 89, 06, 8B, 46, 04, 3B, 05, 20, 29, 42, 00, 74, 16, 8B, 46, 08, 8B, 0D, 18, 2A, 42, 00, 85, 48, 70, 75, 08, E8...
 
[+]

Code size:
107.5 KB (110,080 bytes)

Scheduled Task
Task name:
Convertor

Trigger:
Daily (Runs daily at 05:53:00)


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