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docsopener.exe

Amptek Limited

The application docsopener.exe by Amptek Limited has been detected as adware by 2 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. This version of the installer will bundle the Ask.com Toolbar, a potentially unwanted web browser extension. The file has been seen being downloaded from filesopened.s3.amazonaws.com.
Publisher:
Amptek Limited  (signed and verified)

MD5:
9663e239df7793fda827382e9b8d1230

SHA-1:
c85a1405229888271ee9ac3552e1a26573c5b988

SHA-256:
5e48789bef2b9e264da712c01594c4ae76b6c64a0facac353a301756b058516a

Scanner detections:
2 / 68

Status:
Adware

Explanation:
Bundles that Ask.com toolbar as a third-party offer, a web browser extension that may modify a user's search and home pages.

Analysis date:
12/28/2024 6:58:11 AM UTC  (today)

Scan engine
Detection
Engine version

ESET NOD32
Win32/Bundled.Toolbar.Ask (variant)
9.8709

Reason Heuristics
PUP.Amptek.Installer (M)
15.11.9.15

File size:
4.5 MB (4,745,896 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\downloads\docsopener.exe

Digital Signature
Signed by:
Amptek Limited

Authority:
VeriSign, Inc.

Valid from:
6/6/2012 5:00:00 PM

Valid to:
10/12/2013 4:59:59 PM

Subject:
CN=Amptek Limited, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Amptek Limited, L=Hong Kong, S=Hong Kong, C=HK

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:
55B30AAE501ADA359698E3025A847E57

File PE Metadata
Compilation timestamp:
12/5/2009 2:50:52 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
98304:Oqq3lIy3LLDVQO4Ab3hXfpTe58ShsKQJt1QfzpkJbNAuCJzbfFHT3gU:fq37bnVQ9+hRTqsKcHNANT3B

Entry address:
0x30FA

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 18, EC, 42, 00, E8, F1, 2B, 00, 00, A3, 64, EB, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 8F, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, E3, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 40, 43, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9981

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

The file docsopener.exe has been seen being distributed by the following URL.

http://filesopened.s3.amazonaws.com/DocsOpener.exe

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