Malware Analysis Report

2024-11-13 18:36

Sample ID 240227-wezavsfe27
Target a9c8cae9854449ed7e490c8de523c158
SHA256 b71745bd8676d052b0d35507af40ead88f447efcae034fba84b623551c2baa3e
Tags
xtremerat persistence rat spyware
score
10/10

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
10/10

SHA256

b71745bd8676d052b0d35507af40ead88f447efcae034fba84b623551c2baa3e

Threat Level: Known bad

The file a9c8cae9854449ed7e490c8de523c158 was found to be: Known bad.

Malicious Activity Summary

xtremerat persistence rat spyware

Detect XtremeRAT payload

XtremeRAT

Xtremerat family

Modifies Installed Components in the registry

Adds Run key to start application

Drops file in Windows directory

Program crash

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-27 17:50

Signatures

Detect XtremeRAT payload

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

Xtremerat family

xtremerat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-27 17:50

Reported

2024-02-27 17:53

Platform

win7-20240221-en

Max time kernel

148s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe"

Signatures

Detect XtremeRAT payload

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

XtremeRAT

persistence spyware rat xtremerat

Modifies Installed Components in the registry

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2} C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\Server.exe restart" C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2} C:\Windows\SysWOW64\svchost.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\Server.exe" C:\Windows\SysWOW64\svchost.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe" C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe" C:\Windows\SysWOW64\svchost.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe" C:\Windows\SysWOW64\svchost.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe" C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\InstallDir\Server.exe C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
File created C:\Windows\InstallDir\Server.exe C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
File opened for modification C:\Windows\InstallDir\ C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe

"C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe"

C:\Windows\SysWOW64\svchost.exe

svchost.exe

Network

Country Destination Domain Proto
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp

Files

memory/2344-0-0x0000000010000000-0x000000001004A000-memory.dmp

memory/2344-2-0x0000000010000000-0x000000001004A000-memory.dmp

C:\Windows\InstallDir\Server.exe

MD5 a9c8cae9854449ed7e490c8de523c158
SHA1 55130806c705709fc71fc1f339a11f0144ee716e
SHA256 b71745bd8676d052b0d35507af40ead88f447efcae034fba84b623551c2baa3e
SHA512 acd29374a508cc3e8f171d6db9a551cdc6dd1bbbe7c0b6e0b41726dd37bc35a075d704a212b8f21f673cc9594d49cd52cf2b39642bba0c2162fe3861c77491c1

memory/1612-6-0x0000000010000000-0x000000001004A000-memory.dmp

memory/2344-8-0x0000000010000000-0x000000001004A000-memory.dmp

memory/1612-11-0x0000000010000000-0x000000001004A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-27 17:50

Reported

2024-02-27 17:53

Platform

win10v2004-20240226-en

Max time kernel

142s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe"

Signatures

Detect XtremeRAT payload

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

XtremeRAT

persistence spyware rat xtremerat

Modifies Installed Components in the registry

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2} C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\Server.exe restart" C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe" C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe" C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\InstallDir\Server.exe C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
File created C:\Windows\InstallDir\Server.exe C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A
File opened for modification C:\Windows\InstallDir\ C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe

"C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe"

C:\Windows\SysWOW64\svchost.exe

svchost.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2368 -ip 2368

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 480

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2368 -ip 2368

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 500

Network

Country Destination Domain Proto
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
N/A 10.4.73.139:1603 tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 204.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
N/A 10.4.73.139:1603 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
N/A 10.4.73.139:1603 tcp
US 8.8.8.8:53 192.178.17.96.in-addr.arpa udp
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
N/A 10.4.73.139:1603 tcp
N/A 10.4.73.139:1603 tcp

Files

memory/2368-0-0x0000000010000000-0x000000001004A000-memory.dmp

memory/2368-3-0x0000000010000000-0x000000001004A000-memory.dmp

memory/4216-4-0x0000000010000000-0x000000001004A000-memory.dmp