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opera_ni_stable.exe

Opera

RICH MEDIA SYSTEMS INC.

The application opera_ni_stable.exe by RICH MEDIA SYSTEMS INC 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 1800dcdn.blob.core.windows.net.
Publisher:
RICH MEDIA SYSTEMS INC.  (signed and verified)

Product:
Opera

Version:
1.0.0.0

MD5:
8f838440a13e63e41d84c899602aac1a

SHA-1:
9ca6bb1120edeeeb3a6e565e7de7b55d31016a2f

SHA-256:
fcc081f50d6f0a45b0730ce9cff6ca3ccb3291fa1cbe3efbfd52ea6b8797a135

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:
10/11/2025 3:44:46 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.RICHMEDI.Installer (M)
16.3.12.12

File size:
415.7 KB (425,648 bytes)

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}\opera_ni_stable.exe

Digital Signature
Signed by:
RICH MEDIA SYSTEMS INC.

Authority:
Symantec Corporation

Valid from:
2/17/2015 6:00:00 AM

Valid to:
2/18/2016 5:59:59 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 5:53:00 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:siuhCanY4arRel2jflz95SHv57hrujCUib6rH+l/WQ5:wpn4rRYgflz9sR7hrujCUM6rHU/p

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 opera_ni_stable.exe has been seen being distributed by the following URL.

http://1800dcdn.blob.core.windows.net/dir195/wi/17/33/1/.../opera_ni_stable.exe

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