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mrutmp.exe

MailRuUpdater

LLC Mail.Ru

The executable mrutmp.exe has been detected as malware by 1 anti-virus scanner. It runs as a scheduled task under the Windows Task Scheduler named MailRuUpdater triggered to execute each time a user logs in. While running, it connects to the Internet address moscow.cdnmail.ru on port 80 using the HTTP protocol.
Publisher:
Mail.Ru  (signed by LLC Mail.Ru)

Product:
MailRuUpdater

Description:
Mail.Ru updater

Version:
3.10.0.20

MD5:
8e954f96909f9c3a1a34a803f3c23d03

SHA-1:
c5387d890b7438cbbe5d8b47f83a884995d57bf0

SHA-256:
cf8fe7f9f152a1028ab0e5c8a2c57585d3e71aca876436b9c0b4a78241e0f337

Scanner detections:
1 / 68

Status:
Malware

Analysis date:
4/16/2024 10:49:08 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
Win32.Generic
17.3.9.17

File size:
3.9 MB (4,105,944 bytes)

Product version:
3.10.0.20

Copyright:
Copyright 2015

Original file name:
MailRuUpdater.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\Documents and Settings\{user}\Local settings\temp\mrutmp.exe

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:
3/9/2017 3:10:10 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

Entry address:
0x1637FC

Entry point:
E8, 3C, 2E, 01, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 83, 3D, A4, EF, 7B, 00, 00, 56, 8B, 35, 14, D2, 7B, 00, 75, 04, 33, C0, EB, 63, 57, 85, F6, 75, 1B, 39, 35, 18, D2, 7B, 00, 74, 53, E8, 52, 2F, 01, 00, 85, C0, 75, 4A, 8B, 35, 14, D2, 7B, 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, A3, 2F, 01, 00, 83, C4, 0C, 85, C0, 74, 0F, 83, C6, 04, 8B, 0E, 85, C9, 75...
 
[+]

Code size:
3.1 MB (3,215,872 bytes)

Scheduled Task
Task name:
MailRuUpdater

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

Trigger:
Logon (Runs on logon)


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

TCP (HTTP):
Connects to moscow.cdnmail.ru  (217.69.139.110:80)

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

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

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

TCP (HTTP):
Connects to ip-46-19-97-98.gnc.net  (46.19.97.98:80)

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