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rescueroot.exe

KBM2 Installer

Best Download Manager

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application rescueroot.exe by Best Download Manager has been detected as adware by 15 anti-malware scanners. During install, it bundles potentially unwanted software on a user's computer at the same time without adequate consent. The file has been seen being downloaded from api.kbm2.com.
Publisher:
Best Download Manager   (signed by Best Download Manager)

Product:
KBM2 Installer

Version:
2.5.1.0

MD5:
dab4377d4a209209b36e0f8d1f897c42

SHA-1:
785efb4ef0072f2f9ee793bc07122b6323d9dc75

SHA-256:
5b8789f1351d0502d4e4ef7a352401d7ecefb0bbb6fe4e62b1df6a3b9fe4d758

Scanner detections:
15 / 68

Status:
Adware

Explanation:
May bundle additional potentially unwanted software such as adware during setup.

Analysis date:
4/19/2024 2:34:57 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
AdInject.Bdmngr
2015.0.3335

Baidu Antivirus
PUA.Win32.KBM
4.0.3.14101

Dr.Web
Adware.Plugin.85
9.0.1.0274

ESET NOD32
Win32/KBM (variant)
8.10489

Fortinet FortiGate
Riskware/KBM
10/1/2014

G Data
Win32.Application.Kbm
14.10.24

Malwarebytes
PUP.Optional.BundleInstaller.A
v2014.10.01.09

McAfee
Artemis!DAB4377D4A20
5600.6991

NANO AntiVirus
Riskware.Win32.Plugin.cxiows
0.28.2.62440

Reason Heuristics
PUP.Installer.BestDownloadManager.K
14.10.1.9

Rising Antivirus
PE:Trojan.Win32.Generic.1704EBD1!386198481
23.00.65.14929

Sophos
Generic PUA HI
4.98

Trend Micro House Call
TROJ_GEN.F47V0601
7.2.274

VIPRE Antivirus
sterkly LLC
33558

File size:
523.6 KB (536,200 bytes)

Product version:
2.5.1.0

Copyright:
(c) Best Download Manager . All rights reserved.

Original file name:
KBM2.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\users\{user}\downloads\programs\rescueroot.exe

Digital Signature
Signed by:
Best Download Manager

Authority:
VeriSign, Inc.

Valid from:
7/24/2013 5:00:00 PM

Valid to:
7/25/2015 4:59:59 PM

Subject:
CN=Best Download Manager, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Best Download Manager, L=Carlsbad, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
5F3BBF9CAABCE7C81AB69ABF7371A064

File PE Metadata
Compilation timestamp:
8/7/2013 12:25:15 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:Wgq6uX5c0RzWguzZylIAllGVytvHdKme7IZopYSQGQu:WR610ZluglqytYmesZoRQ4

Entry address:
0x3A3C0

Entry point:
E8, 0E, 6F, 00, 00, E9, 89, FE, FF, FF, 3B, 0D, D0, 0B, 47, 00, 75, 02, F3, C3, E9, 95, 6F, 00, 00, 8B, FF, 55, 8B, EC, 56, 8B, 75, 14, 85, F6, 75, 04, 33, C0, EB, 61, 83, 7D, 08, 00, 75, 13, E8, D9, 35, 00, 00, 6A, 16, 5E, 89, 30, E8, 6C, 75, 00, 00, 8B, C6, EB, 48, 83, 7D, 10, 00, 74, 16, 39, 75, 0C, 72, 11, 56, FF, 75, 10, FF, 75, 08, E8, 66, 70, 00, 00, 83, C4, 0C, EB, C7, FF, 75, 0C, 6A, 00, FF, 75, 08, E8, B4, 31, 00, 00, 83, C4, 0C, 83, 7D, 10, 00, 74, BB, 39, 75, 0C, 73, 0E, E8, 8F, 35, 00, 00, 6A...
 
[+]

Entropy:
6.2735

Code size:
342.5 KB (350,720 bytes)

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

http://api.kbm2.com/downloadLauncher.ashx?cid=1349

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