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unblock-us.exe

The executable unblock-us.exe has been detected as malware by 2 anti-virus scanners. This is a setup program which is used to install the application. It runs as a scheduled task under the Windows Task Scheduler triggered to execute each time a user logs in. The file has been seen being downloaded from www.unblock-us.com and multiple other hosts.
Version:
3, 3, 6, 1

MD5:
18241b306d544664895626e945c91fc6

SHA-1:
640246ae9c7299fa4008310f20c8619fd03ad945

SHA-256:
83f9e7bb7e3673b2b4b774bc97fe8c878d3261e7a0fd7b7a0ca552a9ba8737df

Scanner detections:
2 / 68

Status:
Malware

Analysis date:
4/20/2024 3:59:43 AM UTC  (today)

Scan engine
Detection
Engine version

F-Prot
W32/Undefined.Threat
v6.4.7.1.166

Reason Heuristics
Unnamed.Threat.11
14.3.1.0

File size:
310.8 KB (318,243 bytes)

File type:
Executable application (Win32 EXE)

Language:
English (United Kingdom)

Common path:
C:\users\{user}\downloads\unblock-us.exe

File PE Metadata
Compilation timestamp:
4/16/2010 3:47:33 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
6144:R1db49+rEg024fpLZazEjvE/rbay19tSt4bO2BaDmeBJe59B0TC4WBAXR:RjkArEN249AyE/rbaMct4bO2/VB0O4n

Entry address:
0xB3B80

Entry point:
60, BE, 00, 20, 47, 00, 8D, BE, 00, F0, F8, FF, 57, EB, 0B, 90, 8A, 06, 46, 88, 07, 47, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 72, ED, B8, 01, 00, 00, 00, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, 01, DB, 73, 0B, 75, 28, 8B, 1E, 83, EE, FC, 11, DB, 72, 1F, 48, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, EB, D4, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C9, EB, 52, 31, C9, 83, E8, 03, 72, 11, C1, E0, 08, 8A, 06, 46, 83, F0, FF, 74, 75, D1, F8, 89, C5, EB, 0B, 01, DB, 75, 07, 8B...
 
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Code size:
264 KB (270,336 bytes)

Scheduled Task
Task name:
Unblock-us

Trigger:
Logon (Runs on logon)


The file unblock-us.exe has been seen being distributed by the following 3 URLs.

https://www.unblock-us.com/unblock-us.exe

http://unblock-us.com/unblock-us.exe

http://www.unblock-us.com/unblock-us.exe

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

TCP (HTTP):
Connects to ec2-34-192-62-104.compute-1.amazonaws.com  (34.192.62.104:80)

TCP (HTTP):
Connects to ec2-54-173-118-131.compute-1.amazonaws.com  (54.173.118.131:80)

TCP (HTTP):
Connects to ec2-52-205-55-13.compute-1.amazonaws.com  (52.205.55.13:80)

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