Malware Analysis Report

2025-08-11 01:48

Sample ID 241005-yq739awcmf
Target a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N
SHA256 a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293
Tags
discovery evasion ransomware
score
8/10

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
8/10

SHA256

a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293

Threat Level: Likely malicious

The file a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N was found to be: Likely malicious.

Malicious Activity Summary

discovery evasion ransomware

Disables Task Manager via registry modification

Deletes itself

Sets desktop wallpaper using registry

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Modifies Internet Explorer settings

Suspicious behavior: RenamesItself

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-05 20:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-05 20:00

Reported

2024-10-05 20:02

Platform

win7-20240903-en

Max time kernel

110s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe"

Signatures

Disables Task Manager via registry modification

evasion

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Themes\\TranscodedWallpaper.jpg" C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A

Enumerates physical storage devices

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\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Desktop\General C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Desktop\General\WallpaperSource = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg" C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2076 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe
PID 2076 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe
PID 2076 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe
PID 2076 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe
PID 2816 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe

"C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe"

C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe

"C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe" del

C:\Windows\SysWOW64\cmd.exe

/c del C:\Users\Admin\AppData\Local\Temp\A7C886~1.EXE.tmp >> NUL

Network

N/A

Files

memory/2816-4-0x0000000000400000-0x000000000041F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-05 20:00

Reported

2024-10-05 20:02

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

98s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe"

Signatures

Disables Task Manager via registry modification

evasion

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop\Wallpaper = "\x01" C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.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\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Software\Microsoft\Internet Explorer\Desktop\General C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Internet Explorer\Desktop\General\WallpaperSource = "\x01" C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe

"C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe"

C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe

"C:\Users\Admin\AppData\Local\Temp\a7c88664fac921577e23dbe47c0c54c02ca5547dc08e2e30699c88c65925d293N.exe" del

C:\Windows\SysWOW64\cmd.exe

/c del C:\Users\Admin\AppData\Local\Temp\A7C886~1.EXE.tmp >> NUL

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 66.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

memory/5008-0-0x0000000000400000-0x000000000041F000-memory.dmp