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ykf.exe

Julian Pankratov

The is the installer for the WebPick InstalleRex download manager which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed without consent. The application ykf.exe by Julian Pankratov has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. This is a setup program which is used to install the application. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from world-downloads.info.
Publisher:
Julian Pankratov  (signed and verified)

MD5:
4c2f826ce21ca9329d73bdfbdcd2910b

SHA-1:
4f263f0ff3d58bd4646f9e8ed1dd76b5160f6cf4

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:
4/24/2024 9:17:57 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick.JulianPankratov (M)
16.2.9.20

File size:
1.1 MB (1,182,872 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\Documents and Settings\{user}\Local settings\temporary internet files\content.ie5\{random}\ykf.exe

Digital Signature
Signed by:
Julian Pankratov

Authority:
COMODO CA Limited

Valid from:
10/14/2013 7:00:00 AM

Valid to:
10/15/2014 6:59:59 AM

Subject:
CN=Julian Pankratov, O=Julian Pankratov, STREET=Gagarіna 11, L=Kiev, S=Kiev, PostalCode=02094, C=UA

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
00D14C8CC7422B7B416198EEB359191765

File PE Metadata
Compilation timestamp:
9/29/2013 8:07:56 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
24576:sxllVmuE1SguTOuC58VLaphcMzCTVZz0oT7pg4fpgLDcstp6k:sxJ+15ruFLapuTDz0onpXKQ6wk

Entry address:
0x1A561

Entry point:
E8, F3, 40, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, 48, BF, 42, 00, E8, E9, 09, 00, 00, E8, C0, 42, 00, 00, 0F, B7, F0, 6A, 02, E8, 86, 40, 00, 00, 59, B8, 4D, 5A, 00, 00, 66, 39, 05, 00, 00, 40, 00, 74, 04, 33, DB, EB, 33, A1, 3C, 00, 40, 00, 81, B8, 00, 00, 40, 00, 50, 45, 00, 00, 75, EB, B9, 0B, 01, 00, 00, 66, 39, 88, 18, 00, 40, 00, 75, DD, 33, DB, 83, B8, 74, 00, 40, 00, 0E, 76, 09, 39, 98, E8, 00, 40, 00, 0F, 95, C3, 89, 5D, E4, E8, 96, 01, 00, 00, 85, C0, 75, 08, 6A, 1C, E8, DC, 00, 00, 00, 59, E8...
 
[+]

Entropy:
7.8403  (probably packed)

Code size:
145 KB (148,480 bytes)

The file ykf.exe has been seen being distributed by the following URL.

http://world-downloads.info/?e=wbn&prv=SearchNewTab&publisher=298&country=ID&ind=16533434030084073920&exid=0&ssd=13982116177799771043&hid=2692142939263336691&osid=501&channel=0&sfx=1&category_name=NewTab&install_date=20121025&ntab=http://.../

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