Malware Analysis Report

2025-01-18 04:28

Sample ID 231207-gzbmzahehj
Target tmp
SHA256 1fea532c75a33209f094f835261b4f579613a7b2ece7f046a11309d34537f8d5
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1fea532c75a33209f094f835261b4f579613a7b2ece7f046a11309d34537f8d5

Threat Level: Known bad

The file tmp was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Unsigned PE

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-07 06:14

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

2023-12-07 06:14

Reported

2023-12-07 06:16

Platform

win7-20231130-en

Max time kernel

149s

Max time network

149s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Creates scheduled task(s)

persistence
Description Indicator Process Target
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\tmp.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2112 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe C:\Windows\system32\schtasks.exe
PID 2112 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe C:\Windows\system32\schtasks.exe
PID 2112 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Office365" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Office365.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp

Files

memory/2112-0-0x0000000001260000-0x0000000001584000-memory.dmp

memory/2112-1-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

memory/2112-2-0x000000001B050000-0x000000001B0D0000-memory.dmp

memory/2112-3-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

memory/2112-4-0x000000001B050000-0x000000001B0D0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-07 06:14

Reported

2023-12-07 06:16

Platform

win10v2004-20231130-en

Max time kernel

146s

Max time network

149s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Creates scheduled task(s)

persistence
Description Indicator Process Target
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\tmp.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 432 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe C:\Windows\SYSTEM32\schtasks.exe
PID 432 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\tmp.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Office365" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Office365.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 83.177.190.20.in-addr.arpa udp
ZA 41.216.183.22:4782 tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 22.183.216.41.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
ZA 41.216.183.22:4782 tcp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp
ZA 41.216.183.22:4782 tcp

Files

memory/432-0-0x0000000000DF0000-0x0000000001114000-memory.dmp

memory/432-1-0x00007FFCD4030000-0x00007FFCD4AF1000-memory.dmp

memory/432-2-0x000000001BED0000-0x000000001BEE0000-memory.dmp

memory/432-3-0x000000001BC80000-0x000000001BCD0000-memory.dmp

memory/432-4-0x000000001C590000-0x000000001C642000-memory.dmp

memory/432-5-0x00007FFCD4030000-0x00007FFCD4AF1000-memory.dmp

memory/432-6-0x000000001BED0000-0x000000001BEE0000-memory.dmp