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filesystemdriver_upgrade.exe

OOO

The application filesystemdriver_upgrade.exe by OOO has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a scheduled task under the Windows Task Scheduler named FileSystemDriver triggered daily at a specified time. While running, it connects to the Internet address dns.set.error on port 80 using the HTTP protocol.
Publisher:
OOO   (signed and verified)

MD5:
6b782b1d375f2b0d8c8790e219f4bca8

SHA-1:
a4ee1f2bada9cf64a00a4396c8d5c936fff97816

SHA-256:
2bc27e55cad3d6f6bf1af2c00e482ddd5ca64d4fb30bdbda0555ef94547c24dd

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Analysis date:
7/13/2025 1:40:31 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP (M)
17.2.24.8

File size:
801 KB (820,224 bytes)

File type:
Executable application (Win32 EXE)

Language:
Russian

Common path:
C:\Documents and Settings\{user}\Application data\filesystemdriver\filesystemdriver_upgrade.exe

Digital Signature
Signed by:
OOO

Subject:
CN="OOO ""Port-Prom""", O="OOO ""Port-Prom""", STREET="d. 33 str. 1, ul.1-Ya Brestskaya", L=Moscow, S=Moscow, PostalCode=125047, C=RU

Serial number:
00FD1BF044DB1DBEFCC734DB43DD0B694B

File PE Metadata
Compilation timestamp:
2/17/2017 10:52:39 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x1772

Entry point:
55, 8B, EC, 6A, FF, 68, 00, 7B, 41, 00, 68, D0, 3A, 40, 00, 64, A1, 00, 00, 00, 00, 50, 64, 89, 25, 00, 00, 00, 00, 83, EC, 58, 53, 56, 57, 89, 65, E8, FF, 15, D0, 30, 41, 00, 33, D2, 8A, D4, 89, 15, 54, CF, 4B, 00, 8B, C8, 81, E1, FF, 00, 00, 00, 89, 0D, 50, CF, 4B, 00, C1, E1, 08, 03, CA, 89, 0D, 4C, CF, 4B, 00, C1, E8, 10, A3, 48, CF, 4B, 00, 33, F6, 56, E8, CA, 21, 00, 00, 59, 85, C0, 75, 08, 6A, 1C, E8, B0, 00, 00, 00, 59, 89, 75, FC, E8, 0A, 20, 00, 00, FF, 15, CC, 30, 41, 00, A3, 84, E4, 4B, 00, E8...
 
[+]

Entropy:
6.8578

Developed / compiled with:
Microsoft Visual C++ v6.0

Code size:
72 KB (73,728 bytes)

3 Scheduled Tasks
Task name:
FileSystemDriver

Path:
C:\WINDOWS\Tasks\FileSystemDriver.job

Trigger:
Daily (Runs daily at 1:44 PM)

Task name:
syslog

Trigger:
Time

Task name:
sysnet

Trigger:
Time


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

TCP (HTTP):
Connects to static.174.43.9.5.clients.your-server.de  (5.9.43.174:80)

TCP (HTTP):
Connects to sharing.katcryo.com  (185.20.186.51:80)

TCP (HTTP):
Connects to dns.set.error  (185.14.29.162:80)

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