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yandex.exe

Yandex Installer

YANDEX LLC

The application yandex.exe by YANDEX has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. This is a setup and installation application and has been known to bundle potentially unwanted software. The file has been seen being downloaded from cache-mskdataline06.cdn.yandex.net and multiple other hosts. While running, it connects to the Internet address cache-mskstoredata01.cdn.yandex.net on port 443.
Publisher:
YANDEX LLC  (signed and verified)

Product:
Yandex Installer

Version:
16.9.1.863

MD5:
6a315a70b10b3cc626c342bc89fdbdde

SHA-1:
715824b39242a000f2b6ae40503a49693dbc0244

SHA-256:
2685ee31306f3f057132e1b05f3b8341bf1310be44e211c18486aa63150b844c

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
12/26/2024 9:36:59 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yandex (L)
16.9.12.22

File size:
730 KB (747,512 bytes)

Product version:
16.9.1.863

Copyright:
Copyright © 2012-2016 YANDEX LLC. All Rights Reserved.

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\low\content.ie5\{random}\yandex.exe

Digital Signature
Signed by:
YANDEX LLC

Authority:
GlobalSign nv-sa

Valid from:
9/25/2015 2:44:52 PM

Valid to:
9/25/2017 2:44:52 PM

Subject:
E=pki@yandex-team.ru, CN=YANDEX LLC, O=YANDEX LLC, L=Moscow, S=Moscow, C=RU

Issuer:
CN=GlobalSign CodeSigning CA - G2, O=GlobalSign nv-sa, C=BE

Serial number:
11210FF6462B63D55AFBAA81F9C734A7AA94

File PE Metadata
Compilation timestamp:
9/5/2016 4:06:14 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
14.0

CTPH (ssdeep):
12288:aROjcLaNoVr8acFmGx54EUtgpVw4lxMbthwD1rOTA:aRIh28aQnZM5huxh

Entry address:
0x2C30F

Entry point:
E8, 69, 09, 00, 00, E9, 80, FE, FF, FF, CC, CC, CC, CC, CC, CC, CC, B9, 01, 00, 00, 00, F2, 0F, 10, 2D, 38, 56, 45, 00, EB, 1C, B9, 02, 00, 00, 00, F2, 0F, 10, 2D, 40, 56, 45, 00, EB, 0D, B9, 03, 00, 00, 00, F2, 0F, 10, 2D, 38, 56, 45, 00, 66, 0F, 7E, C0, 25, FF, FF, FF, 7F, 3D, 00, 00, 80, 7F, 0F, 83, 4C, 01, 00, 00, F3, 0F, 5A, C0, 83, F9, 02, 75, 18, F2, 0F, 10, 15, 58, 56, 45, 00, 66, 0F, 2F, C2, 76, 0A, BA, 10, 00, 00, 00, E8, 3D, 01, 00, 00, 66, 0F, 2F, C5, 0F, 83, 21, 01, 00, 00, F2, 0F, 10, 35, 30...
 
[+]

Code size:
319 KB (326,656 bytes)

The file yandex.exe has been seen being distributed by the following 9 URLs.

http://cache-mskdataline06.cdn.yandex.net/download.yandex.ru/downloadable_soft/browser/.../Yandex.exe

http://cache-kz01.cdn.yandex.net/download.yandex.ru/downloadable_soft/browser/.../Yandex.exe

https://browser.yandex.ua/.../?expcalypso=1&banerid=6300000000:586f7d3ee531110017f53635&utm_referrer=http://go.mail.ru/search?fr=chxtn12.0.11&sbmt=1483701569665&gp=811037&q=http%3A%2F%2Fbrowser.yandex.ru%2F&us=10&usln=1&usstr=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%8F%D0%BD&usqid=1bdf44c3866a5257&hasnavig=1&sg=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%8F%D0%BD&ce=1&sgsig=ded73bc38be582261a015318702adf78&zih=1&lite=1

http://cache-default01f.cdn.yandex.net/download.yandex.ru/downloadable_soft/browser/.../Yandex.exe

http://cache-mskm904.cdn.yandex.net/download.yandex.ru/downloadable_soft/browser/.../Yandex.exe

https://browser.yandex.ru/.../?expcalypso=1&stattext=1&bgid=new1&banerid=6302000000:57a0a5da43b28b00170b24e5&utm_referrer=https://www.google.ru/&act=0&zih=1&lite=1

http://download.yandex.ru/downloadable_soft/browser/.../Yandex.exe

http://cache-kz02.cdn.yandex.net/download.yandex.ru/downloadable_soft/browser/.../Yandex.exe

https://browser.yandex.ua/.../?lang=ru&intl=1&net=yes&from=adwords_serp__secure_ru|&banerid=0802000724&gclid=CO2TrNPn2csCFQkq0wodWLMEHQ&_rdr=safe&lite=1

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

TCP (HTTP):
Connects to cdn.yandex.net  (5.45.205.231:80)

TCP (HTTP):
Connects to clck.yandex.ru  (213.180.193.14:80)

TCP (HTTP SSL):
Connects to api.browser.yandex.ru  (87.250.251.82:443)

TCP (HTTP SSL):
Connects to cache-mskstoredata01.cdn.yandex.net  (37.9.96.12:443)

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