Malware Analysis Report

2025-01-18 21:11

Sample ID 240325-b812bscf99
Target dcf1b9bb7f463618e75b7e1f66ebf99e
SHA256 c2eb2e38fa30d47999204440d0f2c2053e7455d0fe7ae8246c1e30b260c70711
Tags
adware stealer
score
6/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
6/10

SHA256

c2eb2e38fa30d47999204440d0f2c2053e7455d0fe7ae8246c1e30b260c70711

Threat Level: Shows suspicious behavior

The file dcf1b9bb7f463618e75b7e1f66ebf99e was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware stealer

Installs/modifies Browser Helper Object

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-25 01:49

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-25 01:49

Reported

2024-03-25 01:52

Platform

win7-20240221-en

Max time kernel

120s

Max time network

121s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dcf1b9bb7f463618e75b7e1f66ebf99e.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx\ = "xx" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\ProgID\ = "dcf1b9bb7f463618e75b7e1f66ebf99e.xx" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE} C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx\Clsid\ = "{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\ = "xx" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dcf1b9bb7f463618e75b7e1f66ebf99e.dll" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1848 wrote to memory of 1732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dcf1b9bb7f463618e75b7e1f66ebf99e.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\dcf1b9bb7f463618e75b7e1f66ebf99e.dll

Network

N/A

Files

memory/1732-0-0x00000000003B0000-0x0000000000443000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-25 01:49

Reported

2024-03-25 01:52

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

151s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dcf1b9bb7f463618e75b7e1f66ebf99e.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\ = "xx" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dcf1b9bb7f463618e75b7e1f66ebf99e.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx\ = "xx" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE} C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dcf1b9bb7f463618e75b7e1f66ebf99e.xx\Clsid\ = "{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-EB17-2FC5-3E77-D6A8BA9A5FFE}\ProgID\ = "dcf1b9bb7f463618e75b7e1f66ebf99e.xx" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2336 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2336 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2336 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dcf1b9bb7f463618e75b7e1f66ebf99e.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\dcf1b9bb7f463618e75b7e1f66ebf99e.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 33.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 174.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp

Files

N/A