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yahoo-messenger-11.5.0.228.exe

Yahoo! Messenger

RICH MEDIA SYSTEMS INC.

The application yahoo-messenger-11.5.0.228.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 the user's temporary directory. The file has been seen being downloaded from yahoo-messenger.joydownload.com and multiple other hosts.
Publisher:
RICH MEDIA SYSTEMS INC.  (signed and verified)

Product:
Yahoo! Messenger

Version:
1.0.0.0

MD5:
416b85262770101494407f8e1255f43a

SHA-1:
9629dbf399d7640307307f66468e694098af85d2

SHA-256:
0aceaf0568aaa9a36c4a941f36a271268b520e989e49b545c33d8f52f28494f9

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:
4/16/2024 10:06:08 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.RICHMEDIASYSTEMS.Installer (M)
16.2.9.11

File size:
415.8 KB (425,744 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\yahoo-messenger-11.5.0.228.exe

Digital Signature
Signed by:
RICH MEDIA SYSTEMS INC.

Authority:
Symantec Corporation

Valid from:
2/16/2015 4:00:00 PM

Valid to:
2/17/2016 3:59:59 PM

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:
5/19/2013 4:53:00 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:ziuqW9ceh9vh1a1Nup1KpDHBLpBGhZGPvCMST+:dqW9X2TOcpNTGhZGPvCMd

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...
 
[+]

Entropy:
7.8812

Packer / compiler:
Nullsoft install system v2.x

Code size:
24 KB (24,576 bytes)

The file yahoo-messenger-11.5.0.228.exe has been seen being distributed by the following 3 URLs.

http://yahoo-messenger.joydownload.com/get_azure_file/.../yan9np5ktEPJgTtbLHuaSrglUZTcWmPG O1UeRvnOZ9mZPeRFnPqHq6EUf2pn6hi vTrNHGxCses55ziVNIRiPvSmc3wdEipyH7XmaQSL1Uz87iPHQNa7Mgb0FbIaS0XH91asfLIxkhnqqnGCclcpemiK51Ujjz9xiTjvQvDpO4etDnPikDgNzgSKpnykNCuMrvhhvybaBn0XXyEcQe5MGxUXjpsJeUkj4rJLxBT5Ziem0o8 igFwgm10jkiJoHASeiDA75scO9kx0ufXjGsngX2svYc3iqT1OZzOh0Kgjx3zPWFgF4

http://yahoo-messenger.joydownload.com/get_azure_file/wUiS4WnYccXAwj uQbjxCggnkkU3LTPkEh74coqM6bdjr3f14WJxwckMLUP1Y/j2PnO20gABcSPQSqDiWuklyPpqxcOXFUXAp3CnERui zjq1aKE7MvT0mlIq4d22gFQXzWtDDRnlcMq C/ySGjaSr9W2oS4YyUMMbMzJFsFMKXlFiMrasWNLB4onqjhFyQmao6x2 s/.../44JDmzR0mOWDP 2AW18uMc2CjBkvagug4MFykimaUFgF4

http://yahoo-messenger.joydownload.com/get_azure_file/wUiS4WnYccXAwj uQbjxCggnkkU3LTPkEh74comb9bp0uHf1 2Jzz94IKUDkYLz0NDC2w15KazrYCeLkErc90bpn1s3eDQ b7WmhWFT8 3G5gefQrtrelWtZqtY6glVIRiL SX4pxYpsvHfoUSCTQblW2o6wb2hYdeRnbFtabfiiFGh0O8TMLAl9z7PvUSwicpe1iLNhUS75oFGMlvxmFtHkJNClNntd1IK3GeM2yURJuJr2zlL7bqBn3n3 XJBAs5L4ACy35MTShy0hebNdRZo/.../44JDnzR0nPnbWsyke3tPBcCv8V0qegv91ewv10CPUFgF4

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