6a98274d799bfe1ad2bf58698793fc0f6d1313c74364fc5e90446e2a5347d68b

Analysis

max time kernel
146s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
05/02/2024, 10:00

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General

Target
91b1fb94c35384f946485ce49a829c74.dll
Size 432KB
Sample240205-l1llsadbd3
SHA256 6a98274d799bfe1ad2bf58698793fc0f6d1313c74364fc5e90446e2a5347d68b
MD5 91b1fb94c35384f946485ce49a829c74
SHA1 61933446cfe318778aa74af842a96961bbfa046d
SHA512 53d93d5e2d2f6d8f8001eb7763f7d792dbd563218df4b9c561a94789669ea6fef1beda0b266bfadfb8c095c5713c04d239f77f373f84155a539b0acbebd1cd87
SSDEEP 6144:I6epeOiQotv6HSIJA7f/r2TYvSEo34DmX2yXyj92JcmnWzwlN/gR7cM/XO8GlXR1:Fepeaotv6HgT16X2wyRknFICmO8hc
MD5 SHA1 SHA512 SSDEEP

Score

6^/10

adware stealer

Malware Config

Signatures

Installs/modifies Browser Helper Object 2 TTPs 2 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\{00007D99-2433-4F0F-86E6-BF7458F38078}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{00007D99-2433-4F0F-86E6-BF7458F38078}\	regsvr32.exe

Modifies registry class 11 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00007D99-2433-4F0F-86E6-BF7458F38078}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00007D99-2433-4F0F-86E6-BF7458F38078}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\91b1fb94c35384f946485ce49a829c74.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00007D99-2433-4F0F-86E6-BF7458F38078}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\91b1fb94c35384f946485ce49a829c74.TAdHelperBHO	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00007D99-2433-4F0F-86E6-BF7458F38078}\ProgID\ = "91b1fb94c35384f946485ce49a829c74.TAdHelperBHO"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00007D99-2433-4F0F-86E6-BF7458F38078}\	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00007D99-2433-4F0F-86E6-BF7458F38078}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\91b1fb94c35384f946485ce49a829c74.TAdHelperBHO\	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\91b1fb94c35384f946485ce49a829c74.TAdHelperBHO\Clsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\91b1fb94c35384f946485ce49a829c74.TAdHelperBHO\Clsid\ = "{00007D99-2433-4F0F-86E6-BF7458F38078}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00007D99-2433-4F0F-86E6-BF7458F38078}\ProgID	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 1608	1492	regsvr32.exe	83
PID 1492 wrote to memory of 1608	1492	regsvr32.exe	83
PID 1492 wrote to memory of 1608	1492	regsvr32.exe	83

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\91b1fb94c35384f946485ce49a829c74.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\91b1fb94c35384f946485ce49a829c74.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:1608

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

Replay Monitor

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Downloads

memory/1608-0-0x00000000006A0000-0x0000000000712000-memory.dmp

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