Malware Analysis Report

2024-08-06 18:18

Sample ID 240524-bfyqhafg64
Target Quasar-Installer.exe
SHA256 2862c2fdbd071dd3308fb352a626da5e5f010c9b5ee9b3b1f6671e78c556dd55
Tags
xenorat rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

2862c2fdbd071dd3308fb352a626da5e5f010c9b5ee9b3b1f6671e78c556dd55

Threat Level: Known bad

The file Quasar-Installer.exe was found to be: Known bad.

Malicious Activity Summary

xenorat rat trojan

XenorRat

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-05-24 01:05

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-24 01:05

Reported

2024-05-24 01:06

Platform

win7-20240220-en

Max time kernel

19s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe"

Signatures

XenorRat

trojan rat xenorat

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 2968 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 2968 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 2968 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 2968 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 2968 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 2968 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 2968 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 2456 wrote to memory of 2516 N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2456 wrote to memory of 2516 N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2456 wrote to memory of 2516 N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2456 wrote to memory of 2516 N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe

"C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe"

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe

"C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe"

C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe

"C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /Create /TN "Quasar" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1278.tmp" /F

Network

Country Destination Domain Proto
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp

Files

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe

MD5 800a317039e17efeb46d6879adf7c19f
SHA1 110fc941037e9ad167b436db313e4ef3e43e18e6
SHA256 7bae7a85d03bf751b5fee0b6141a314c03023c904be6e28d7a90f1cd3910741c
SHA512 ff01e97fc00310b6b766f82971f455a5b0c88505e8e0b4ac2dbfa8991d38375d72751045ea2c799f871074fd497a205671f0ad87e4f7d22187cf2b3ae21d9ed6

memory/2968-18-0x000000007443E000-0x000000007443F000-memory.dmp

memory/2968-19-0x0000000001140000-0x0000000001154000-memory.dmp

memory/2456-27-0x0000000000B90000-0x0000000000BA4000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp1278.tmp

MD5 c7c6824afe2d715ccc1f958697662e6c
SHA1 e8f3e3216ffca69f7cca1f567787f74966b71d96
SHA256 233f565186c07ecbce427bed376789a60ae8ed601bcac3726fe340c5421e9d23
SHA512 c586982443aedcd9a7dc360ab3f5b034e7dfd74cebef490c173e43e3469ddb25c6c05dff679f0c63fd68ac1bbaf9433a97486262d0fafa0f947dd279f801b317

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-24 01:05

Reported

2024-05-24 01:06

Platform

win10v2004-20240508-en

Max time kernel

30s

Max time network

13s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe"

Signatures

XenorRat

trojan rat xenorat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4824 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 4824 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 4824 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe
PID 4208 wrote to memory of 3104 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 4208 wrote to memory of 3104 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 4208 wrote to memory of 3104 N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe
PID 3104 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe C:\Windows\SysWOW64\schtasks.exe
PID 3104 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe C:\Windows\SysWOW64\schtasks.exe
PID 3104 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe

"C:\Users\Admin\AppData\Local\Temp\Quasar-Installer.exe"

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe

"C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe"

C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe

"C:\Users\Admin\AppData\Roaming\XenoManager\Quasar-Installer.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /Create /TN "Quasar" /XML "C:\Users\Admin\AppData\Local\Temp\tmp595B.tmp" /F

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
N/A 127.0.0.1:4444 tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
N/A 127.0.0.1:4444 tcp
US 8.8.8.8:53 udp
N/A 20.114.59.183:443 tcp

Files

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Quasar-Installer.exe

MD5 800a317039e17efeb46d6879adf7c19f
SHA1 110fc941037e9ad167b436db313e4ef3e43e18e6
SHA256 7bae7a85d03bf751b5fee0b6141a314c03023c904be6e28d7a90f1cd3910741c
SHA512 ff01e97fc00310b6b766f82971f455a5b0c88505e8e0b4ac2dbfa8991d38375d72751045ea2c799f871074fd497a205671f0ad87e4f7d22187cf2b3ae21d9ed6

memory/4208-18-0x000000007467E000-0x000000007467F000-memory.dmp

memory/4208-19-0x00000000004E0000-0x00000000004F4000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Quasar-Installer.exe.log

MD5 916851e072fbabc4796d8916c5131092
SHA1 d48a602229a690c512d5fdaf4c8d77547a88e7a2
SHA256 7e750c904c43d27c89e55af809a679a96c0bb63fc511006ffbceffc2c7f6fb7d
SHA512 07ce4c881d6c411cac0b62364377e77950797c486804fb10d00555458716e3c47b1efc0d1f37e4cc3b7e6565bb402ca01c7ea8c963f9f9ace941a6e3883d2521

C:\Users\Admin\AppData\Local\Temp\tmp595B.tmp

MD5 c7c6824afe2d715ccc1f958697662e6c
SHA1 e8f3e3216ffca69f7cca1f567787f74966b71d96
SHA256 233f565186c07ecbce427bed376789a60ae8ed601bcac3726fe340c5421e9d23
SHA512 c586982443aedcd9a7dc360ab3f5b034e7dfd74cebef490c173e43e3469ddb25c6c05dff679f0c63fd68ac1bbaf9433a97486262d0fafa0f947dd279f801b317