0cfef18e64402a36f5a2b7cdfad73aab51fce357266cf34b9bf1940141a2d71d

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
18/03/2024, 17:01

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General

Target

d40b486469b01472f5a5f7a997aad540.dll
Size

160KB
MD5

d40b486469b01472f5a5f7a997aad540
SHA1

f66e982253c03fec461624ded3ec1db868fe0e05
SHA256

0cfef18e64402a36f5a2b7cdfad73aab51fce357266cf34b9bf1940141a2d71d
SHA512

25a3a911512ef7312f5ce07e6a4d7347bbf25739cd0e8f930db1de12166e7c90bf8db47ee2b38825101b903325610157d6a7e474a9e057ecee68c07e297d60ac
SSDEEP

3072:RSvgYVCtWlbbrMbvT0q8O1cZPzQ7IXMBc+AMP+QfQEhxFyVU7w9s3:HYVwvP6bQ7yMP+DE827ss3

Score

6^/10

adware bootkit persistence 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\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}	regsvr32.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	regsvr32.exe

Modifies registry class 11 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\d40b486469b01472f5a5f7a997aad540.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\webbrowser = "{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\wversion = "3.4.7"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\ = "WebHelper Class"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 1364	1960	regsvr32.exe	28
PID 1960 wrote to memory of 1364	1960	regsvr32.exe	28
PID 1960 wrote to memory of 1364	1960	regsvr32.exe	28
PID 1960 wrote to memory of 1364	1960	regsvr32.exe	28
PID 1960 wrote to memory of 1364	1960	regsvr32.exe	28
PID 1960 wrote to memory of 1364	1960	regsvr32.exe	28
PID 1960 wrote to memory of 1364	1960	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\d40b486469b01472f5a5f7a997aad540.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\d40b486469b01472f5a5f7a997aad540.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Writes to the Master Boot Record (MBR)
  - Modifies registry class
  PID:1364

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1364-0-0x0000000010000000-0x0000000010035000-memory.dmp

Filesize
212KB

Download
memory/1364-1-0x0000000000230000-0x0000000000260000-memory.dmp

Filesize
192KB

Download
memory/1364-2-0x0000000000180000-0x0000000000183000-memory.dmp

Filesize
12KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads