Malware Analysis Report

2025-05-06 00:50

Sample ID 241109-zag3kavjdm
Target 36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN
SHA256 36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031e
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

36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031e

Threat Level: Shows suspicious behavior

The file 36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN was found to be: Shows suspicious behavior.

Malicious Activity Summary

discovery persistence

Deletes itself

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 20:30

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 20:30

Reported

2024-11-09 20:32

Platform

win7-20240903-en

Max time kernel

119s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.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\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.exe

"C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/1076-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1076-2-0x00000000001B0000-0x00000000001BE000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 721c0b113bb089c810525a3815b7a2ee
SHA1 6eaf4d5391ee5c9a7a908788da35889de64fbbd8
SHA256 66a5b03e74156601b4ceadac6f36ae14d4ea65b868fe74548a79fa9655dd510b
SHA512 636813215d0aeeb486c902b562abddd8099045b890e2bdeabd70753e0d2901db514994b04a023c985c299c98eba025dcdc47330ad3d6a450c207255f11abe79e

memory/1172-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1172-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 20:30

Reported

2024-11-09 20:32

Platform

win10v2004-20241007-en

Max time kernel

119s

Max time network

98s

Command Line

"C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.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\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.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\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.exe

"C:\Users\Admin\AppData\Local\Temp\36f99af0deca2322b005ce945c6068c234c25dd38ab6989d64f84f933aba031eN.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

memory/2936-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 721c0b113bb089c810525a3815b7a2ee
SHA1 6eaf4d5391ee5c9a7a908788da35889de64fbbd8
SHA256 66a5b03e74156601b4ceadac6f36ae14d4ea65b868fe74548a79fa9655dd510b
SHA512 636813215d0aeeb486c902b562abddd8099045b890e2bdeabd70753e0d2901db514994b04a023c985c299c98eba025dcdc47330ad3d6a450c207255f11abe79e

memory/2936-4-0x0000000000400000-0x000000000040E000-memory.dmp

memory/4940-7-0x0000000000400000-0x000000000040E000-memory.dmp