Malware Analysis Report

2025-08-11 08:17

Sample ID 241112-pe5pbasejm
Target bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N
SHA256 bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267
Tags
discovery persistence
score
7/10

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
7/10

SHA256

bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267

Threat Level: Shows suspicious behavior

The file bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N was found to be: Shows suspicious behavior.

Malicious Activity Summary

discovery persistence

Executes dropped EXE

Deletes itself

Adds Run key to start application

Drops file in Windows directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-12 12:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-12 12:15

Reported

2024-11-12 12:17

Platform

win7-20241023-en

Max time kernel

119s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe"

Signatures

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe

"C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2156-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 7c794c57333d31e8bf8eb814b51ba843
SHA1 7637b56f7c32fcf2ab280af36e303bb016181a6e
SHA256 0c1064d60cdbdbda6d127dc4aa11c2c2158f61ee03045a55c67a4be5256e77a0
SHA512 e542865a0579a04688c1f952fa3d11aee27be565f834a51785470216a404d287f13c86d3ef38ede6ced6e60d0006e50c0fbb37bae0ff5bbc3049c8b7d040f720

memory/2156-6-0x0000000000400000-0x000000000040F000-memory.dmp

memory/2132-8-0x0000000000400000-0x000000000040F000-memory.dmp

memory/2132-10-0x0000000000400000-0x000000000040F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-12 12:15

Reported

2024-11-12 12:17

Platform

win10v2004-20241007-en

Max time kernel

119s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe"

Signatures

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\microsofthelp.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe

"C:\Users\Admin\AppData\Local\Temp\bf5899ffd7c5a806928951cae770d054513b7604e259ea237d1fcd7cbd461267N.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/4428-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 7c794c57333d31e8bf8eb814b51ba843
SHA1 7637b56f7c32fcf2ab280af36e303bb016181a6e
SHA256 0c1064d60cdbdbda6d127dc4aa11c2c2158f61ee03045a55c67a4be5256e77a0
SHA512 e542865a0579a04688c1f952fa3d11aee27be565f834a51785470216a404d287f13c86d3ef38ede6ced6e60d0006e50c0fbb37bae0ff5bbc3049c8b7d040f720

memory/4428-4-0x0000000000400000-0x000000000040F000-memory.dmp

memory/1732-6-0x0000000000400000-0x000000000040F000-memory.dmp