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nasm-2.09.08-installer.exe

The executable nasm-2.09.08-installer.exe has been detected as malware by 2 anti-virus scanners. The program is a setup application that uses the Nullsoft Install System installer, however the file is not signed with an authenticode signature from a trusted source. The file has been seen being downloaded from www.nasm.us.
MD5:
950fce9400c93b95b17ddd7949b7c0f4

SHA-1:
903f3d3778aa85a1b4a9f78e52bdc9e6834b35c6

SHA-256:
a583c1804ca8b93321c8c06938733560ff9fe3fe23c875db2b6c18596515cdaf

Scanner detections:
2 / 68

Status:
Malware

Explanation:
This is part of the Crossrider Internet browser extension framework which may modify the user's web browser settings including changing the home and search pages.

Note:
Crossrider is the owner of a platform that enables the creation of cross-browser extensions by developers but is not the owner of this detected application.

Analysis date:
4/26/2024 4:15:41 AM UTC  (today)

Scan engine
Detection
Engine version

Bkav FE
HW32.CDB
1.3.0.4959

Reason Heuristics
Threat.Win.Reputation.IMP
16.11.30.12

File size:
720.8 KB (738,080 bytes)

File type:
Executable application (Win32 EXE)

Installer:
Nullsoft Install System

Common path:
C:\users\{user}\downloads\nasm-2.09.08-installer.exe

File PE Metadata
Compilation timestamp:
8/11/2010 6:39:38 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.56

CTPH (ssdeep):
12288:AUIGQT1EqHcsLG3CUCf/9Bl+7fcDzJMHD8U7Q7TrhoElNHWqqSriFvFlMJzEKSxo:AUIGaEILECf/9pyEOqhiFviERkaId

Entry address:
0x3E0F

Entry point:
55, 89, E5, 57, 56, 53, 81, EC, AC, 01, 00, 00, E8, 94, 52, 00, 00, C7, 04, 24, 01, 80, 00, 00, E8, 38, 4F, 00, 00, 53, C7, 04, 24, 00, 00, 00, 00, E8, A3, 52, 00, 00, 51, A3, 40, 5B, 42, 00, C7, 04, 24, 08, 00, 00, 00, E8, 23, 32, 00, 00, A3, F0, 5B, 42, 00, 8D, 85, 84, FE, FF, FF, 52, C7, 44, 24, 10, 00, 00, 00, 00, C7, 44, 24, 0C, 60, 01, 00, 00, 89, 44, 24, 08, C7, 44, 24, 04, 00, 00, 00, 00, C7, 04, 24, 4C, B2, 40, 00, E8, CD, 51, 00, 00, 83, EC, 14, C7, 44, 24, 04, 4D, B2, 40, 00, C7, 04, 24, 20, 5C...
 
[+]

Entropy:
7.9616  (probably packed)

Code size:
32.5 KB (33,280 bytes)

The file nasm-2.09.08-installer.exe has been seen being distributed by the following URL.

http://www.nasm.us/pub/nasm/releasebuilds/2.09.08/.../nasm-2.09.08-installer.exe

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