f76d6a54a9010ad4044094cc19641f9c83085543479635353164e73e6c773255

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04/01/2024, 19:49

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General

Target

41c22d3cc889203fbf7b1693914de3fb.dll
Size

546KB
MD5

41c22d3cc889203fbf7b1693914de3fb
SHA1

a9f5931dd92e7a80be9532299be367f3855fb191
SHA256

f76d6a54a9010ad4044094cc19641f9c83085543479635353164e73e6c773255
SHA512

7f659cf13fd350cffd167aac68508a9209a398e8d11765415cfe416e0f9648a323d64c798d283d190c42e5663c84f06bf417192f4076980e2a38bb1fa896feaa
SSDEEP

12288:bisJfKjGOJV7+KYOri/PBmyaK6c38g9DVhTlYpWNr:bTEGW+1FLaisg9DLTl+WR

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\{82FE757D-2859-454C-A4A3-D70416F731F8}	regsvr32.exe

Modifies registry class 11 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{82FE757D-2859-454C-A4A3-D70416F731F8}\ = "ExFlash"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{82FE757D-2859-454C-A4A3-D70416F731F8}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\41c22d3cc889203fbf7b1693914de3fb.GetFlash\Clsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\41c22d3cc889203fbf7b1693914de3fb.GetFlash\Clsid\ = "{82FE757D-2859-454C-A4A3-D70416F731F8}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{82FE757D-2859-454C-A4A3-D70416F731F8}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{82FE757D-2859-454C-A4A3-D70416F731F8}\ProgID\ = "41c22d3cc889203fbf7b1693914de3fb.GetFlash"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{82FE757D-2859-454C-A4A3-D70416F731F8}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{82FE757D-2859-454C-A4A3-D70416F731F8}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{82FE757D-2859-454C-A4A3-D70416F731F8}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\41c22d3cc889203fbf7b1693914de3fb.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\41c22d3cc889203fbf7b1693914de3fb.GetFlash	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\41c22d3cc889203fbf7b1693914de3fb.GetFlash\ = "ExFlash"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\41c22d3cc889203fbf7b1693914de3fb.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\41c22d3cc889203fbf7b1693914de3fb.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:2040

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/2040-0-0x00000000021A0000-0x000000000222D000-memory.dmp

Filesize
564KB

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