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kj_110102.exe

Rutubo

AVSoftware Ltd

The application kj_110102.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.tagfunfiles.com.
Publisher:
Dom   (signed by AVSoftware Ltd)

Product:
Rutubo

Description:
Rutubo Setup

Version:
5.0.2.1

MD5:
e20a14cc9555a0e5eeb92fff8aa0835e

SHA-1:
b568e57127886fc03fb9d40c51f7ec32ca9e1c53

SHA-256:
3b64b9001b6c678db4646e7825de0ee0df1adeb948930e14ba88027f13200656

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 3:04:49 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.InstallCore.AVSoftwa.Installer (M)
16.6.5.4

File size:
968.8 KB (992,064 bytes)

Product version:
2.3.8

File type:
Executable application (Win32 EXE)

Installer:
Inno Setup

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\kj_110102.exe

Digital Signature
Signed by:
AVSoftware Ltd

Authority:
GlobalSign nv-sa

Valid from:
12/31/2015 11:55:52 PM

Valid to:
12/31/2016 11:55:52 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 7:22:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:66WsEh1GXeQO2Our4MkO6H12ro8JG8Gf5l1nRobv:7ch10ZO2OuUu6H0rowyfD0

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 kj_110102.exe has been seen being distributed by the following URL.

http://www.tagfunfiles.com/c?x=4xSlJ6QPPfJXIlC5igNTCfHqUjU9l0VU5XbqYGK3eTQ=&c=N1yzCc1IzoNKqAkMUzjfiL3Twa6gBIULCLRjCqXrRFkk0XiAAWr5Q8mT Y50fQCgYTbSeaQOfwlQX5o7GUvrvfYiRbVfna2mgEW9/p2Wkk9vPsJ4F2MN aiKaCksDV3T&downloadAs=KJ_110102.exe&fallback_url=http://.../get.php?file=b07e27bd&m3

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