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opera27.exe

Opera

RICH MEDIA SYSTEMS INC.

The application opera27.exe by RICH MEDIA SYSTEMS INC has been detected as a potentially unwanted program by 18 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. The installer uses the OpenCandy monitzation platform which will donwload and install offers in the setup for potentially unwanted software including ad/search-supported toolbars. The file has been seen being downloaded from opera.pl.1800download.com and multiple other hosts.
Publisher:
RICH MEDIA SYSTEMS INC.  (signed and verified)

Product:
Opera

Version:
1.0.0.0

MD5:
8374d39af1f639f343d249d2d098043b

SHA-1:
6b8a23a5f9f466ea91fe7b1eae1f489bd58062c8

Scanner detections:
18 / 68

Status:
Potentially unwanted

Explanation:
Packages the OpenCandy software bundler that offers to install additional software and may include web browser add-ons and toolbars which display advertising (based on publisher settings and geo context).

Analysis date:
10/13/2025 4:51:42 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.Agent
7.1.1

AhnLab V3 Security
PUP/Win32.OpenCandy
2015.05.15

AVG
OpenCandy
2016.0.3089

Baidu Antivirus
Adware.Win32.OpenCandy
4.0.3.1563

Clam AntiVirus
Win.Trojan.Agent-855157
0.98/21511

Dr.Web
Adware.Downware.10304
9.0.1.0154

ESET NOD32
Win32/OpenCandy.C potentially unsafe (variant)
9.11626

Fortinet FortiGate
Riskware/OpenCandy
6/3/2015

G Data
Win32.Adware.OpenCandy
15.6.25

K7 AntiVirus
Trojan
13.203.15910

Malwarebytes
PUP.Optional.OpenCandy
v2015.06.03.06

McAfee
Artemis!8374D39AF1F6
5600.6745

NANO AntiVirus
Riskware.Win32.Downloader.dqybkl
0.30.24.1357

Panda Antivirus
PUP/OpenCandy
15.06.03.06

Reason Heuristics
PUP.Installer.RICHMEDIASYSTEMS
15.6.3.18

Sophos
OpenCandy
4.98

Trend Micro House Call
Suspicious_GEN.F47V0415
7.2.154

VIPRE Antivirus
Sevas-S Installer
40224

File size:
415.6 KB (425,568 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
English (United States)

Common path:
C:\Documents and Settings\{user}\Local settings\temp\{random}.tmp\opera27.exe

Digital Signature
Signed by:
RICH MEDIA SYSTEMS INC.

Authority:
Symantec Corporation

Valid from:
2/17/2015 1:00:00 AM

Valid to:
2/18/2016 12:59:59 AM

Subject:
CN=RICH MEDIA SYSTEMS INC., O=RICH MEDIA SYSTEMS INC., L=HENDERSON, S=Nevada, C=US

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
3F87144C25AF8BCF29F29C5A1FEEF4BA

File PE Metadata
Compilation timestamp:
5/20/2013 1:53:00 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:jiuCMPwPVpmrvVwYDwkgcaeyY0z7aakUJ:tCMYPVpmrvLDjgxu3w

Entry address:
0x331C

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, 30, 92, 40, 00, 89, 6C, 24, 14, FF, 15, 34, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, BC, 70, 40, 00, 55, FF, 15, AC, 72, 40, 00, 6A, 08, A3, 98, 92, 42, 00, E8, A8, 2E, 00, 00, A3, E4, 91, 42, 00, 55, 8D, 44, 24, 34, 68, B4, 02, 00, 00, 50, 55, 68, 90, 06, 42, 00, FF, 15, 7C, 71, 40, 00, 68, 7C, 93, 40, 00, 68, E0, 81, 42, 00, E8, 13, 2B, 00, 00, FF, 15, 34, 71, 40, 00, BB, 00, 40, 43, 00, 50, 53, E8, 01, 2B, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
24 KB (24,576 bytes)

The file opera27.exe has been seen being distributed by the following 2 URLs.

http://opera.pl.1800download.com/get_azure_file/wUiS4WnYccXEwj 8WvauHEA0kxQ8PTK1GhHga5/Zsekkuzyi93p5iNEPLE31N/upfSK x0oNejaeEKqtHr8llvEgnYTIFQfI9S78Dk/.../47g==

http://opera.1800download.com/get_azure_file/wUiS4WnYccXEwj 8WvauHEA0kxQ8PTK1GhHga5/ZtukkqzyqsGMxwd0EP0Xlbbj5N2G3g15cOHHaQrXyCr50ybhhztTCR1nTri3/EhO/7Wm0yP/SpMuByDdZqtY6gV9QV3W1AX1/lcMj7H jGSPFEfUZipvzPHQNbbMgcFhacf7lXTl1fsTcc1Ni1eOxAC18coT20 Q1DWmzu17E3/VuDoD5NNClLHtd1dO8D JnlR4f/.../CsXhBihATzjolWGHXrBwX47g==

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