winsyst.exe

Ammyy Admin

Ammyy

The application winsyst.exe by Ammyy 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 separate (within the context of its own process) windows Service named “Ammyy Admin”. While running, it connects to the Internet address msk-f695.host-telecom.com on port 80 using the HTTP protocol.
Publisher:
Ammyy LLC  (signed by Ammyy)

Product:
Ammyy Admin

Version:
3.5

MD5:
54c43b855e53897b7256ef327f9802b4

SHA-1:
6b87bc8fe1b48042f57406695da5f07f9292fc64

SHA-256:
0090d1dc02cb7d1bdf6d5546710400a61601c4bc75cad915cc0b9e09a30145c1

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:
4/24/2024 2:23:19 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Ammyy (M)
17.3.6.19

File size:
770.3 KB (788,760 bytes)

Product version:
3.5

File type:
Executable application (Win32 EXE)

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

Digital Signature
Signed by:

Authority:
VeriSign, Inc.

Valid from:
1/14/2014 5:00:00 AM

Valid to:
1/15/2015 4:59:59 AM

Subject:
CN=Ammyy, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Ammyy, L=Москва, S=Москва, C=RU

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:
52C9E020C4D675A668E1DDEB0EF1167B

File PE Metadata
Compilation timestamp:
7/3/2014 3:56:03 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x7C3AE

Entry point:
55, 8B, EC, 6A, FF, 68, A0, DE, 48, 00, 68, 50, C5, 47, 00, 64, A1, 00, 00, 00, 00, 50, 64, 89, 25, 00, 00, 00, 00, 83, EC, 68, 53, 56, 57, 89, 65, E8, 33, DB, 89, 5D, FC, 6A, 02, FF, 15, A4, 33, 48, 00, 59, 83, 0D, 98, 57, 4B, 00, FF, 83, 0D, 9C, 57, 4B, 00, FF, FF, 15, A8, 33, 48, 00, 8B, 0D, 80, 57, 4B, 00, 89, 08, FF, 15, AC, 33, 48, 00, 8B, 0D, 7C, 57, 4B, 00, 89, 08, A1, B0, 33, 48, 00, 8B, 00, A3, 94, 57, 4B, 00, E8, 60, 01, 00, 00, 39, 1D, 70, DE, 4A, 00, 75, 0C, 68, 7A, C5, 47, 00, FF, 15, B4, 33...
 
[+]

Developed / compiled with:
Microsoft Visual C++ v6.0

Code size:
520 KB (532,480 bytes)

Service
Display name:
Ammyy Admin

Service name:
AmmyyAdmin

Type:
Win32OwnProcess


The executing file has been seen to make the following network communications in live environments.

TCP (HTTP SSL):
Connects to msk-f695.host-telecom.com  (91.109.202.123:443)

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