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firefox setup stub 39.0.3.exe

7-Zip

Igor Pavlov

The executable firefox setup stub 39.0.3.exe has been detected as malware by 14 anti-virus scanners. This is a setup and installation application, however the file is not signed with an authenticode signature from a trusted source. Infected by an entry-point obscuring polymorphic file infector which will create a peer-to-peer botnet and receives URLs of additional files to download. The file has been seen being downloaded from download-installer.cdn.mozilla.net.
Publisher:
Igor Pavlov

Product:
7-Zip

Description:
7z Setup SFX

Version:
4.42

MD5:
d9e7cb4d87c33c3a120bbe16981fc96c

SHA-1:
9a5fe2459cdc4ba3f0b2101fe58b2c5d8518d289

SHA-256:
0e98c28e863784f270b2301ef78f668db3ae57502d2ce3e09038505398ff5ff8

Scanner detections:
14 / 68

Status:
File is infected by a Virus

Explanation:
The file is infected by a polymorphic file infector virus.

Analysis date:
4/23/2024 10:18:23 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Win32.Sality.3
5813571

Avira AntiVirus
W32/Sality.AT
7.11.30.172

avast!
Win32:SaliCode
160118-1

AVG
Win32/Sality
2015.0.4477

Dr.Web
Win32.Sector.30
9.0.1.05190

Emsisoft Anti-Malware
Win32.Sality
10.0.0.5366

ESET NOD32
Win32/Sality.NBA virus
7.0.302.0

F-Prot
W32/Sality.gen2
4.6.5.141

Kaspersky
Virus.Win32.Sality
15.0.0.562

McAfee
Virus.W32/Sality.gen.z
18.0.204.0

Microsoft Security Essentials
Threat.Undefined
1.213.3291.0

Norman
Win32.Sality.3
11.01.2016 17:30:26

Sophos
Virus 'Mal/Sality-D'
5.23

VIPRE Antivirus
Threat.4721115
46592

File size:
309 KB (316,456 bytes)

Product version:
4.42

Copyright:
Copyright (c) 1999-2006 Igor Pavlov

Original file name:
7zS.sfx.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\firefox setup stub 39.0.3.exe

File PE Metadata
Compilation timestamp:
4/17/2014 10:59:40 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:Fvc6rBAWDbBU0NDKjCtl6yFrcjvfprjo+G1edkfu9Wn/S:FgWDbBU09K+6ywvBvoGWnq

Entry address:
0x21E30

Entry point:
60, C6, C0, 46, 2D, E1, D2, E3, B2, 81, D1, 49, 44, FB, 14, 86, FA, EB, 06, 0F, B7, D5, F6, C2, 98, B8, 58, 4D, 00, D9, 0F, AF, FA, 69, F3, DC, AA, 60, D9, 03, D9, 69, D5, 7A, 10, 5E, 62, C6, C6, CF, 8D, 05, 99, BF, 08, 11, FF, C6, F7, C3, 7E, 1B, E3, 38, 84, EC, 09, D6, EB, 06, 0F, BE, CA, C6, C7, C4, 81, C2, 45, DA, D8, E4, FE, CC, E8, 8E, 00, 00, 00, 89, ED, 84, D4, 85, D2, 0F, AF, DD, 8B, D5, 86, CB, 88, D5, 69, D5, 0D, 94, C4, E5, 81, FF, 91, 24, 3E, BA, 0F, AF, D1, BE, 00, 00, 00, 00, 81, F9, B0, 83...
 
[+]

Entropy:
7.9180  (probably packed)

Code size:
40 KB (40,960 bytes)

The file firefox setup stub 39.0.3.exe has been seen being distributed by the following URL.

https://download-installer.cdn.mozilla.net/pub/firefox/releases/39.0.3/win32/.../Firefox Setup Stub 39.0.3.exe

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