Malware Analysis Report

2024-10-23 21:24

Sample ID 240805-tnw6ra1erp
Target f75a45087aac828dd3f21760b5af31c5a83c7209a67645d5080c39129ff46488
SHA256 f75a45087aac828dd3f21760b5af31c5a83c7209a67645d5080c39129ff46488
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

f75a45087aac828dd3f21760b5af31c5a83c7209a67645d5080c39129ff46488

Threat Level: Known bad

The file f75a45087aac828dd3f21760b5af31c5a83c7209a67645d5080c39129ff46488 was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Suspicious use of SendNotifyMessage

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Scheduled Task/Job: Scheduled Task

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-05 16:12

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

2024-08-05 16:12

Reported

2024-08-05 16:15

Platform

win7-20240705-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Enumerates physical storage devices

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\Bootstrapper.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Spotify" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe

"C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Spotify" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 wefdwef-34180.portmap.host udp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
US 8.8.8.8:53 wefdwef-34180.portmap.host udp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp

Files

memory/2368-0-0x000007FEF6243000-0x000007FEF6244000-memory.dmp

memory/2368-1-0x0000000000B10000-0x0000000000E34000-memory.dmp

memory/2368-2-0x000007FEF6240000-0x000007FEF6C2C000-memory.dmp

C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe

MD5 14b871855a9046ef9aedeec80f9c2d86
SHA1 32c0ad34f524748b76c090fc881b75b928341e7e
SHA256 b14b916cd2f188ea09035489056e0bff9f8cb8e4a30eff50172f86319fabc940
SHA512 7ada8280b9a5a4dcb427da5f7634335c191645614148ed550dbbbacfaed72e1e99202caedddc02f48dc73d96bf0ecd4d35c2ed2d6206e9b25efba4f29dcc8e96

memory/2548-8-0x000007FEF6240000-0x000007FEF6C2C000-memory.dmp

memory/2368-7-0x000007FEF6240000-0x000007FEF6C2C000-memory.dmp

memory/2548-9-0x0000000000CE0000-0x0000000001004000-memory.dmp

memory/2548-10-0x000007FEF6240000-0x000007FEF6C2C000-memory.dmp

memory/2548-11-0x000007FEF6240000-0x000007FEF6C2C000-memory.dmp

memory/2548-12-0x000007FEF6240000-0x000007FEF6C2C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-05 16:12

Reported

2024-08-05 16:15

Platform

win10v2004-20240802-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.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:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Enumerates physical storage devices

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\Bootstrapper.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Spotify" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe

"C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Spotify" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 wefdwef-34180.portmap.host udp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
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
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
US 8.8.8.8:53 145.136.73.23.in-addr.arpa udp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp

Files

memory/4352-0-0x00007FFACEB53000-0x00007FFACEB55000-memory.dmp

memory/4352-1-0x0000000000710000-0x0000000000A34000-memory.dmp

memory/4352-2-0x00007FFACEB50000-0x00007FFACF611000-memory.dmp

C:\Users\Admin\AppData\Roaming\system32\Bootstrapper.exe

MD5 14b871855a9046ef9aedeec80f9c2d86
SHA1 32c0ad34f524748b76c090fc881b75b928341e7e
SHA256 b14b916cd2f188ea09035489056e0bff9f8cb8e4a30eff50172f86319fabc940
SHA512 7ada8280b9a5a4dcb427da5f7634335c191645614148ed550dbbbacfaed72e1e99202caedddc02f48dc73d96bf0ecd4d35c2ed2d6206e9b25efba4f29dcc8e96

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Bootstrapper.exe.log

MD5 baf55b95da4a601229647f25dad12878
SHA1 abc16954ebfd213733c4493fc1910164d825cac8
SHA256 ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924
SHA512 24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

memory/3632-9-0x00007FFACEB50000-0x00007FFACF611000-memory.dmp

memory/4352-10-0x00007FFACEB50000-0x00007FFACF611000-memory.dmp

memory/3632-11-0x00007FFACEB50000-0x00007FFACF611000-memory.dmp

memory/3632-13-0x000000001C470000-0x000000001C522000-memory.dmp

memory/3632-12-0x000000001C360000-0x000000001C3B0000-memory.dmp

memory/3632-14-0x00007FFACEB50000-0x00007FFACF611000-memory.dmp