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mrupdater.exe.dul!

MailRuUpdater

LLC Mail.Ru

The file mrupdater.exe.dul! by LLC Mail.Ru has been detected as a potentially unwanted program by 2 anti-malware scanners. It runs as a scheduled task under the Windows Task Scheduler named MailRuUpdater triggered to execute each time a user logs in. The file has been seen being downloaded from mailruupdater.cdnmail.ru. While running, it connects to the Internet address xml.binupdate.mail.ru on port 80 using the HTTP protocol.
Publisher:
Mail.Ru  (signed by LLC Mail.Ru)

Product:
MailRuUpdater

Description:
Mail.Ru updater

Version:
3.10.0.5

MD5:
bc033e65d93237b5982abe1c482ddb10

SHA-1:
a90ddf3c7cba5f2f32dbc8f2f0c88edc645acade

SHA-256:
cd950f9c9f7e0754cc01c107ccf132580facb4f7bb02c49ff5f7e590d885d18d

Scanner detections:
2 / 68

Status:
Potentially unwanted

Analysis date:
4/26/2024 7:51:59 AM UTC  (today)

Scan engine
Detection
Engine version

ESET NOD32
Win32/MailRu.G potentially unwanted application
6.3.12010.0

Reason Heuristics
Win32.Generic
17.2.23.14

File size:
4 MB (4,167,384 bytes)

Product version:
3.10.0.5

Copyright:
Copyright 2015

Original file name:
MailRuUpdater.exe

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\mrupdater.exe.dul!

Digital Signature
Signed by:
LLC Mail.Ru

Authority:
thawte, Inc.

Valid from:
8/6/2015 4:00:00 AM

Valid to:
10/5/2017 3:59:59 AM

Subject:
CN=LLC Mail.Ru, O=LLC Mail.Ru, L=Moscow, S=Moscow, C=RU

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
2019877A933D8E2E71548EA4AB4827F1

File PE Metadata
Compilation timestamp:
1/18/2017 5:14:25 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

Entry address:
0x16F60C

Entry point:
E8, 7C, 2E, 01, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 83, 3D, 14, D6, 7C, 00, 00, 56, 8B, 35, 7C, B8, 7C, 00, 75, 04, 33, C0, EB, 63, 57, 85, F6, 75, 1B, 39, 35, 80, B8, 7C, 00, 74, 53, E8, 92, 2F, 01, 00, 85, C0, 75, 4A, 8B, 35, 7C, B8, 7C, 00, 85, F6, 74, 40, 83, 7D, 08, 00, 74, 3A, FF, 75, 08, E8, 75, 2E, 00, 00, 59, 8B, F8, EB, 27, 51, E8, 6A, 2E, 00, 00, 59, 3B, C7, 76, 19, 8B, 06, 80, 3C, 38, 3D, 75, 11, 57, FF, 75, 08, 50, E8, E3, 2F, 01, 00, 83, C4, 0C, 85, C0, 74, 0F, 83, C6, 04, 8B, 0E, 85, C9, 75...
 
[+]

Code size:
3.1 MB (3,265,536 bytes)

Scheduled Task
Task name:
MailRuUpdater

Trigger:
Logon (Runs on logon)


The file mrupdater.exe.dul! has been seen being distributed by the following URL.

http://mailruupdater.cdnmail.ru/MailRuUpdater.exe

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

TCP (HTTP):
Connects to xml.binupdate.mail.ru  (217.69.139.247:80)

TCP (HTTP):
Connects to mrds.mail.ru  (217.69.139.245:80)

TCP (HTTP SSL):
Connects to vrrp-telemeter1.mail.ru  (217.69.133.209:443)

TCP (HTTP):
Connects to moscow.cdnmail.ru  (94.100.180.110:80)

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