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downloader_signed-n.62003.exe

WOffer

NOSIBAY

The application downloader_signed-n.62003.exe by NOSIBAY has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from es-cdn.win-offer.com.
Publisher:
NOSIBAY  (signed and verified)

Product:
WOffer

Description:
WOffer installer

Version:
3.0.673.0.62003

MD5:
8468d4379b2d5eded7666ed5c32927a2

SHA-1:
0e56de26e863bad85a8ef7a9fed9427e32c3a597

SHA-256:
26c7defcb36272906f547bf1244cd822d9aadcf60741212364fe3acdaf30d223

Scanner detections:
1 / 68

Status:
Potentially unwanted

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:
11/25/2024 1:01:52 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.NOSIBAY.Installer (M)
16.2.7.2

File size:
169.1 KB (173,208 bytes)

Copyright:
© WOffer

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\downloader_signed-n.62003.exe

Digital Signature
Signed by:
NOSIBAY

Authority:
Thawte, Inc.

Valid from:
9/25/2014 2:00:00 AM

Valid to:
12/26/2015 12:59:59 AM

Subject:
CN=NOSIBAY, OU=Secure Application Development, O=NOSIBAY, L=PEROLS, S=Hérault, C=FR

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

Serial number:
52E368957AD1C7202A103C7CFD7BD6C2

File PE Metadata
Compilation timestamp:
12/5/2009 11:50:46 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
3072:5QIURTXJLRJMfBTV1QFRzcLu72PZmZ5KfjRHi79pfVK0MOpO:5sPJMZTV8RIMZaRHi79u0MO

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 09, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file downloader_signed-n.62003.exe has been seen being distributed by the following URL.

http://es-cdn.win-offer.com/downloader/es/BOO001/.../downloader_signed-n.62003.exe

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