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nsk4e02.tmp

The file nsk4e02.tmp has been detected as a potentially unwanted program by 4 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable 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 s3.amazonaws.com. While running, it connects to the Internet address server-204-246-169-59.jfk1.r.cloudfront.net on port 80 using the HTTP protocol.
MD5:
3e1970bf5d419cb5aed72edb114953c6

SHA-1:
54351ef8ad055bf4e52e5197af257016ec810428

SHA-256:
673e97e6c767796cbd1621f575d341477de647e6e5d2d2da8f59bd81bb1691bf

Scanner detections:
4 / 68

Status:
Potentially unwanted

Analysis date:
4/26/2024 2:13:51 PM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
PUP/Win32.VOPackage
2015.09.28

Arcabit
PUP.Adware.ConvertAd
1.0.0.567

Kaspersky
not-a-virus:AdWare.Win32.Vopak
14.0.0.1197

Reason Heuristics
Adware.Generic.ABT (M)
16.2.29.17

File size:
225.7 KB (231,157 bytes)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\nsk4e02.tmp

File PE Metadata
Compilation timestamp:
12/5/2009 11:50:52 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
3072:GgXdZt9P6D3XJBlvX2sL4lSib63jtYBm7mpKOAptrAOR3XzFTCZqJ3W9CgqtimU3:Ge34hGsL4466zj7mpkvnjTCZUTtQHv

Entry address:
0x30FA

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 18, EC, 42, 00, E8, F1, 2B, 00, 00, A3, 64, EB, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 8F, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, E3, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 40, 43, 00, 50, 57, E8, 92, 28, 00, 00...
 
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Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

The file nsk4e02.tmp has been seen being distributed by the following URL.

https://s3.amazonaws.com/cf_vopackage/.../SearchUpdater.exe

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to server-204-246-169-59.jfk1.r.cloudfront.net  (204.246.169.59:80)

TCP (HTTP):
Connects to ec2-52-1-45-42.compute-1.amazonaws.com  (52.1.45.42:80)

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