Malware Analysis Report

2024-10-19 08:36

Sample ID 240728-y9vl9ssgnm
Target celery installer.exe
SHA256 6b400e1fc91d48c849aa79f355b641d35658188d668686ad7192333e9b92a1ae
Tags
office04 quasar spyware trojan
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 Overview

score
10/10

SHA256

6b400e1fc91d48c849aa79f355b641d35658188d668686ad7192333e9b92a1ae

Threat Level: Known bad

The file celery installer.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-28 20:29

Signatures

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

2024-07-28 20:29

Reported

2024-07-28 20:34

Platform

win10v2004-20240709-en

Max time kernel

56s

Max time network

68s

Command Line

"C:\Users\Admin\AppData\Local\Temp\celery installer.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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\system32\SubDir\celery.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\SubDir\celery.exe C:\Users\Admin\AppData\Local\Temp\celery installer.exe N/A
File opened for modification C:\Windows\system32\SubDir\celery.exe C:\Users\Admin\AppData\Local\Temp\celery installer.exe N/A
File opened for modification C:\Windows\system32\SubDir C:\Users\Admin\AppData\Local\Temp\celery installer.exe N/A
File opened for modification C:\Windows\system32\SubDir\celery.exe C:\Windows\system32\SubDir\celery.exe N/A
File opened for modification C:\Windows\system32\SubDir C:\Windows\system32\SubDir\celery.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
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\celery installer.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\SubDir\celery.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\SubDir\celery.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\celery installer.exe

"C:\Users\Admin\AppData\Local\Temp\celery installer.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "windows defender" /sc ONLOGON /tr "C:\Windows\system32\SubDir\celery.exe" /rl HIGHEST /f

C:\Windows\system32\SubDir\celery.exe

"C:\Windows\system32\SubDir\celery.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "windows defender" /sc ONLOGON /tr "C:\Windows\system32\SubDir\celery.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 Joesnazzy-26854.portmap.host udp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp
DE 193.161.193.99:26854 Joesnazzy-26854.portmap.host tcp

Files

memory/2276-0-0x00007FF866BD3000-0x00007FF866BD5000-memory.dmp

memory/2276-1-0x0000000000030000-0x0000000000354000-memory.dmp

memory/2276-2-0x00007FF866BD0000-0x00007FF867691000-memory.dmp

C:\Windows\System32\SubDir\celery.exe

MD5 45f959942912fbcd1653b538332c5ec9
SHA1 7fdcd65b7bd7d5bdbc279e0b4fa6eebb8c36fca1
SHA256 6b400e1fc91d48c849aa79f355b641d35658188d668686ad7192333e9b92a1ae
SHA512 9072548e7a5e8f92a910c8621ff1a67fba6dcc4aa3c7af82047bdfdb86165d6d3466ed32081ef87816ccc04b6549367ec65fa2d69e8865ef0d42b6befe26f466

memory/4868-9-0x00007FF866BD0000-0x00007FF867691000-memory.dmp

memory/2276-10-0x00007FF866BD0000-0x00007FF867691000-memory.dmp

memory/4868-11-0x00007FF866BD0000-0x00007FF867691000-memory.dmp

memory/4868-12-0x000000001BA10000-0x000000001BA60000-memory.dmp

memory/4868-13-0x000000001C460000-0x000000001C512000-memory.dmp

memory/4868-14-0x00007FF866BD0000-0x00007FF867691000-memory.dmp