Malware Analysis Report

2024-08-06 11:33

Sample ID 240611-bjlv4syelk
Target 37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe
SHA256 37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
Tags
beobeo quasar spyware 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

37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf

Threat Level: Known bad

The file 37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe was found to be: Known bad.

Malicious Activity Summary

beobeo quasar spyware trojan

Detects Windows executables referencing non-Windows User-Agents

Quasar family

Quasar payload

Detects executables containing common artifacts observed in infostealers

Quasar RAT

Detects executables containing common artifacts observed in infostealers

Detects Windows executables referencing non-Windows User-Agents

Executes dropped EXE

Looks up external IP address via web service

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

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
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

2024-06-11 01:10

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

Detects executables containing common artifacts observed in infostealers

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

Quasar family

quasar

Quasar payload

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-11 01:10

Reported

2024-06-11 01:13

Platform

win7-20240508-en

Max time kernel

150s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar 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

Detects Windows executables referencing non-Windows User-Agents

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

Detects executables containing common artifacts observed in infostealers

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1984 wrote to memory of 2444 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Windows\system32\schtasks.exe
PID 1984 wrote to memory of 2444 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Windows\system32\schtasks.exe
PID 1984 wrote to memory of 2444 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Windows\system32\schtasks.exe
PID 1984 wrote to memory of 2740 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe
PID 1984 wrote to memory of 2740 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe
PID 1984 wrote to memory of 2740 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe
PID 2740 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe C:\Windows\system32\schtasks.exe
PID 2740 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe C:\Windows\system32\schtasks.exe
PID 2740 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe

"C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Realtek" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe

"C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Realtek" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
VN 222.253.182.185:9090 tcp
VN 222.253.182.185:9090 tcp
VN 222.253.182.185:9090 tcp
VN 222.253.182.185:9090 tcp
VN 222.253.182.185:9090 tcp
VN 222.253.182.185:9090 tcp
VN 222.253.182.185:9090 tcp

Files

memory/1984-0-0x000007FEF5753000-0x000007FEF5754000-memory.dmp

memory/1984-1-0x0000000000970000-0x00000000009F4000-memory.dmp

memory/1984-2-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe

MD5 a760c4263a2d1e144c2fd116bf1351e1
SHA1 98da7637a98df832078ed0ec08d11d588223783e
SHA256 37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
SHA512 ee8ff2686a4a95a779711ca3126423f769351de6b9e8a27d0ff0d78212e76ef703ada91778620799dd3dbe07cea840f7f44c65273278ea3b4f539274dbc806bf

memory/2740-7-0x0000000000210000-0x0000000000294000-memory.dmp

memory/1984-8-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

memory/2740-10-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

memory/2740-9-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

memory/2740-11-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 01:10

Reported

2024-06-11 01:13

Platform

win10v2004-20240226-en

Max time kernel

141s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Detects Windows executables referencing non-Windows User-Agents

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

Detects executables containing common artifacts observed in infostealers

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A api.ipify.org N/A N/A
N/A api.ipify.org N/A N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4292 wrote to memory of 4576 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4292 wrote to memory of 4576 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4292 wrote to memory of 4372 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe
PID 4292 wrote to memory of 4372 N/A C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe
PID 4372 wrote to memory of 3928 N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4372 wrote to memory of 3928 N/A C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe

"C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Realtek" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe

"C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Realtek" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe" /rl HIGHEST /f

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4080 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 101.58.20.217.in-addr.arpa udp
GB 96.16.110.114:80 tcp
VN 222.253.182.185:9090 tcp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 185.182.253.222.in-addr.arpa udp
US 8.8.8.8:53 tools.keycdn.com udp
DE 185.172.148.96:443 tools.keycdn.com tcp
US 8.8.8.8:53 api.ipify.org udp
US 104.26.13.205:443 api.ipify.org tcp
US 8.8.8.8:53 96.148.172.185.in-addr.arpa udp
US 8.8.8.8:53 205.13.26.104.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 76.234.34.23.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 48.110.63.41.in-addr.arpa udp
US 8.8.8.8:53 91.65.42.20.in-addr.arpa udp

Files

memory/4292-0-0x00007FFC4E983000-0x00007FFC4E985000-memory.dmp

memory/4292-1-0x0000000000AB0000-0x0000000000B34000-memory.dmp

memory/4292-2-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Services\Realtek HD Audio Universal Services.exe

MD5 a760c4263a2d1e144c2fd116bf1351e1
SHA1 98da7637a98df832078ed0ec08d11d588223783e
SHA256 37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
SHA512 ee8ff2686a4a95a779711ca3126423f769351de6b9e8a27d0ff0d78212e76ef703ada91778620799dd3dbe07cea840f7f44c65273278ea3b4f539274dbc806bf

memory/4372-7-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

memory/4372-8-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

memory/4292-10-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

memory/4372-11-0x000000001C340000-0x000000001C390000-memory.dmp

memory/4372-12-0x000000001C450000-0x000000001C502000-memory.dmp

memory/4372-15-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

memory/4372-16-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp