d96a6e27c7a07cff29c6be2b2da2dc1612e9fd10e9d4d55f71d0a3724bc18709

Analysis

max time kernel
93s
max time network
118s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/02/2024, 17:55

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General

Target

a9ca85b35bc4f49264481df5331039f4.dll
Size

9KB
MD5

a9ca85b35bc4f49264481df5331039f4
SHA1

5f6d7a943df54c16c436bf4ae48bc39dcd479110
SHA256

d96a6e27c7a07cff29c6be2b2da2dc1612e9fd10e9d4d55f71d0a3724bc18709
SHA512

893b23c989dec49a5d3e647aa3073ceb899506e63ab5157e8a2b27dc6f2af9cc1d0f47a268c94bdb949e27b821fe34fa73ddc7fdffc3c3b27960564f482fbecf
SSDEEP

192:FB37Jwj9BP+jVUCG+GQ6m7FXHdIxZ/Sgz2kDEF0PaEEgTMJogCR:FNifPoUCGoNdIxZ/RKkDEiSE0c

Score

6^/10

adware stealer

Malware Config

Signatures

Installs/modifies Browser Helper Object 2 TTPs 1 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{2ee25147-37d4-4640-832c-fccfac8b21d9}	regsvr32.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32:vyaa.dll	regsvr32.exe
File opened for modification	C:\Windows\system32:vyaa.dll	regsvr32.exe

Modifies registry class 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2ee25147-37d4-4640-832c-fccfac8b21d9}\InprocServer32\ = "C:\\Windows\\system32:vyaa.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2ee25147-37d4-4640-832c-fccfac8b21d9}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2ee25147-37d4-4640-832c-fccfac8b21d9}\InprocServer32	regsvr32.exe

NTFS ADS 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32:vyaa.dll	regsvr32.exe
File created	C:\Windows\system32:vyaa.dll	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3796 wrote to memory of 2940	3796	regsvr32.exe	88
PID 3796 wrote to memory of 2940	3796	regsvr32.exe	88
PID 3796 wrote to memory of 2940	3796	regsvr32.exe	88

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\a9ca85b35bc4f49264481df5331039f4.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:3796
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\a9ca85b35bc4f49264481df5331039f4.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in Windows directory
  - Modifies registry class
  - NTFS ADS
  PID:2940

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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