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helper.dll

Irrational Number Applications

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module helper.dll by Irrational Number Applications has been detected as adware by 15 anti-malware scanners. It is also typically executed from the user's temporary directory.
Publisher:
Irrational Number Applications  (signed and verified)

MD5:
6271476d22d33d9cbb240a1834248a32

SHA-1:
be7b7066aab55aea56efeb689eb40502899bc8ae

SHA-256:
ad65336b5fdcbe910c13a0b5e09ca200f3cc7341f74f15db9e927fe4e18bad6a

Scanner detections:
15 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/26/2024 9:33:20 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.PullUpdate
7.1.1

AhnLab V3 Security
PUP/Win32.PullUpdate
2015.10.14

Avira AntiVirus
ADWARE/Adware.Gen7
8.3.2.2

AVG
Generic_r
2016.0.2909

Baidu Antivirus
Adware.Win32.PullUpdate
4.0.3.15121

Dr.Web
Adware.Yontoo.79
9.0.1.0335

ESET NOD32
MSIL/Adware.PullUpdate (variant)
9.12406

K7 AntiVirus
Adware
13.210.17534

Malwarebytes
PUP.Optional.PullUpdate
v2015.12.01.06

NANO AntiVirus
Riskware.Win32.Yontoo.dxieds
0.30.26.3947

Panda Antivirus
PUP/WebShield
15.12.01.06

Reason Heuristics
PUP.Yontoo.IrrationalNumberApplications (M)
15.12.1.6

Rising Antivirus
PE:Adware.PullUpdate!6.258A[F1]
23.00.65.151129

SUPERAntiSpyware
PUP.PullUpdate/Variant
9474

Zillya! Antivirus
Adware.PullUpdate.Win32.70621
2.0.0.2445

File size:
1.3 MB (1,361,912 bytes)

File type:
Dynamic link library (Win32 DLL)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\helper.dll

Digital Signature
Signed by:
Irrational Number Applications

Authority:
Symantec Corporation

Valid from:
1/19/2015 4:00:00 PM

Valid to:
3/20/2016 4:59:59 PM

Subject:
CN=Irrational Number Applications, O=Irrational Number Applications, L=St. James, S=St. James, C=BB

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
637F0A74512CF65B05B3A5A0241D6624

File PE Metadata
Compilation timestamp:
10/12/2015 6:38:51 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
24576:hd/HyCJwPrh6MR9EYiqCwMbfX9RGpphviGvDLUBdh04+aUS17BN76M0O9TugO:h9SCJwPrh6XYiqCwMbfX9GnLLyh04ASK

Entry address:
0xDCE54

Entry point:
55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, 00, DF, 00, 00, FF, 75, 10, FF, 75, 0C, FF, 75, 08, E8, 07, 00, 00, 00, 83, C4, 0C, 5D, C2, 0C, 00, 6A, 0C, 68, 48, 8A, 12, 10, E8, 5D, 6A, 00, 00, 33, C0, 40, 8B, 75, 0C, 85, F6, 75, 0C, 39, 35, 98, A0, 13, 10, 0F, 84, E4, 00, 00, 00, 83, 65, FC, 00, 83, FE, 01, 74, 05, 83, FE, 02, 75, 35, 8B, 0D, 2C, D4, 10, 10, 85, C9, 74, 0C, FF, 75, 10, 56, FF, 75, 08, FF, D1, 89, 45, E4, 85, C0, 0F, 84, B1, 00, 00, 00, FF, 75, 10, 56, FF, 75, 08, E8, 11, FE, FF, FF, 89, 45, E4...
 
[+]

Entropy:
6.5937

Developed / compiled with:
Microsoft Visual C++

Code size:
1 MB (1,086,976 bytes)

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