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winrar531.exe

Rutubo

AVSoftware Ltd

The application winrar531.exe, “Rutubo Setup ” by AVSoftware 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 Inno Setup installer. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. The file has been seen being downloaded from www.chucklevaultsbulk.com.
Publisher:
Dom   (signed by AVSoftware Ltd)

Product:
Rutubo

Description:
Rutubo Setup

Version:
5.0.2.1

MD5:
a41b0324feaf1b0924fdf74b58dd8387

SHA-1:
4208771fc51f7d41dc3e1d75543cdcf5afe9a0cb

SHA-256:
fec4e1ce9f084e49c18e8c16fb2e74e277a95364f5cd39aeac1b741ace8acc8d

Scanner detections:
1 / 68

Status:
Potentially unwanted

Explanation:
Uses the InstallCore download manager to install additional potentially unwanted software which may include extensions such as DealPly and various toolbars.

Analysis date:
1/12/2025 5:55:05 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.InstallCore.AVSoftwa.Installer (M)
16.5.28.11

File size:
968.8 KB (992,064 bytes)

Product version:
2.3.8

File type:
Executable application (Win32 EXE)

Installer:
Inno Setup

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\winrar531.exe

Digital Signature
Signed by:
AVSoftware Ltd

Authority:
GlobalSign nv-sa

Valid from:
12/31/2015 6:25:52 PM

Valid to:
12/31/2016 6:25:52 PM

Subject:
CN=AVSoftware Ltd, O=AVSoftware Ltd, L=Sofia, C=BG

Issuer:
CN=GlobalSign CodeSigning CA - SHA256 - G2, O=GlobalSign nv-sa, C=BE

Serial number:
112134814B6C56AF7047C195AE1D737EC185

File PE Metadata
Compilation timestamp:
6/20/1992 2:52:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:V6WsEh1GXeQO2Our4MkO6H12ro8JG8Gf5l1nRobv:Ach10ZO2OuUu6H0rowyfD0

Entry address:
0xA5F8

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, CE, 8A, FF, FF, E8, D5, 9C, FF, FF, E8, 64, 9F, FF, FF, E8, 07, A0, FF, FF, E8, A6, BF, FF, FF, E8, 11, E9, FF, FF, E8, 78, EA, FF, FF, 33, C0, 55, 68, C9, AC, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 92, AC, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, C0, 40, 00, E8, 26, F5, FF, FF, E8, 11, F1, FF, FF, 80, 3D, 34, B2, 40, 00, 00, 74, 0C, E8, 23, F6, FF, FF, 33, C0, E8, C4, 97, FF, FF, 8D, 55, F0, 33, C0, E8, B6, C5, FF, FF, 8B, 55...
 
[+]

Entropy:
7.9332

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
39.5 KB (40,448 bytes)

The file winrar531.exe has been seen being distributed by the following URL.

http://www.chucklevaultsbulk.com/c?x=7JOgvKsBcw5NBGugXptneeRxITZjJ28Tqw4bHu/Jlko=&c=WIH1JVWv0oaqkMzzpNv 8ckJGMptxLw9VMuiM0nZLkl90Nst0lTSkeLKxNA1iUoduCwCHatzAHjiHWpf2f0dO9hb/DGK7a6YplRhSsFtle3JGaZfAmyqW6iiypj5SCGL&downloadAs=WinRAR531.exe&fallback_url=https://s03.solidfilesusercontent.com/MjY0NmEzMTBmZTVlNTg0NmQwYTc3ODk1N2IzNmFiOGY5YmY3ODM4YjoxYjZDdXY6M3VTVzJTYkpvWlFURm9kNlprTDI1VFNqbllB/.../WinRAR.5.31.exe

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