Malware Analysis Report

2025-03-14 23:42

Sample ID 240407-xg4tssbd7s
Target 1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3
SHA256 1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3
Tags
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

1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3

Threat Level: Shows suspicious behavior

The file 1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3 was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence

Executes dropped EXE

Loads dropped DLL

Deletes itself

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 18:50

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-07 18:50

Reported

2024-04-07 18:53

Platform

win7-20240319-en

Max time kernel

149s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.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-1-5-21-2610426812-2871295383-373749122-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe

"C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.cygdy.com udp

Files

memory/1800-0-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1800-7-0x0000000000400000-0x000000000040C000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0d7d41ee42999851899c61c7f93c8470
SHA1 09845f8746a5d12e7f04218edb90a84adbbdfd97
SHA256 70f1572181eef4f9ef7690d67d6d79dfdf8882a6fbbbe4c11cedf7caa9716098
SHA512 5b16b0dac13ad8db71d5aab17d3d77d997266390ea64c54b7a113896bdaad3939039a15fb616a19f12a80c54a0cd4c13edea17629b4b2a7c460d94c6bb587d04

memory/1800-3-0x0000000000020000-0x000000000002C000-memory.dmp

memory/2292-10-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1800-8-0x0000000000020000-0x000000000002C000-memory.dmp

memory/2292-14-0x0000000010000000-0x0000000010005000-memory.dmp

memory/2292-15-0x0000000000400000-0x000000000040C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 18:50

Reported

2024-04-07 18:53

Platform

win10v2004-20240226-en

Max time kernel

153s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.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

Loads dropped DLL

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-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe

"C:\Users\Admin\AppData\Local\Temp\1499fbc10a44491543fc37491a747ba4d00e7919ee6599a7666bb0197ac0b6d3.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 159.113.53.23.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 171.117.168.52.in-addr.arpa udp
US 8.8.8.8:53 www.cygdy.com udp
US 8.8.8.8:53 www.cygdy.com udp

Files

memory/4596-0-0x0000000000400000-0x000000000040C000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0d7d41ee42999851899c61c7f93c8470
SHA1 09845f8746a5d12e7f04218edb90a84adbbdfd97
SHA256 70f1572181eef4f9ef7690d67d6d79dfdf8882a6fbbbe4c11cedf7caa9716098
SHA512 5b16b0dac13ad8db71d5aab17d3d77d997266390ea64c54b7a113896bdaad3939039a15fb616a19f12a80c54a0cd4c13edea17629b4b2a7c460d94c6bb587d04

memory/3864-6-0x0000000000400000-0x000000000040C000-memory.dmp

memory/4596-5-0x0000000000400000-0x000000000040C000-memory.dmp

C:\Windows\HidePlugin.dll

MD5 4c0b9970f96300dfa1f45afc7539d35f
SHA1 ebbb4ed2003662d78d1f32e7b6da1b6f504ae711
SHA256 4e96660cc8be7171a79755a20860366987547322b3a809e78c9850f14c242262
SHA512 579f8787b52bf62a0296d8a24753263201fbc84abec5927033e3c97576f965ead0f8422acd3f7af1345b0df0001b0cd68fa971062e21269f6940cf3e1508ca88

memory/3864-11-0x0000000010000000-0x0000000010005000-memory.dmp

memory/3864-12-0x0000000000400000-0x000000000040C000-memory.dmp