Malware Analysis Report

2024-10-23 21:24

Sample ID 240805-tl2y8a1enl
Target Bootstrapper (extract.me).zip
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 Bootstrapper (extract.me).zip was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar payload

Quasar family

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Scheduled Task/Job: Scheduled Task

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-05 16:09

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 16:09

Reported

2024-08-05 16:12

Platform

win7-20240729-en

Max time kernel

138s

Max time network

143s

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
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.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

C:\Windows\explorer.exe

"C:\Windows\explorer.exe"

C:\Windows\system32\AUDIODG.EXE

C:\Windows\system32\AUDIODG.EXE 0x5e4

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
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp
DE 193.161.193.99:34180 wefdwef-34180.portmap.host tcp

Files

memory/408-0-0x000007FEF6513000-0x000007FEF6514000-memory.dmp

memory/408-1-0x0000000000890000-0x0000000000BB4000-memory.dmp

memory/408-2-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

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

MD5 14b871855a9046ef9aedeec80f9c2d86
SHA1 32c0ad34f524748b76c090fc881b75b928341e7e
SHA256 b14b916cd2f188ea09035489056e0bff9f8cb8e4a30eff50172f86319fabc940
SHA512 7ada8280b9a5a4dcb427da5f7634335c191645614148ed550dbbbacfaed72e1e99202caedddc02f48dc73d96bf0ecd4d35c2ed2d6206e9b25efba4f29dcc8e96

memory/2776-9-0x00000000010D0000-0x00000000013F4000-memory.dmp

memory/2776-8-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

memory/408-7-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

memory/2776-10-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

memory/2776-11-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-05 16:09

Reported

2024-08-05 16:10

Platform

win10v2004-20240802-en

Max time kernel

32s

Max time network

33s

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

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp

Files

memory/1736-1-0x0000000000CE0000-0x0000000001004000-memory.dmp

memory/1736-0-0x00007FFA9F433000-0x00007FFA9F435000-memory.dmp

memory/1736-2-0x00007FFA9F430000-0x00007FFA9FEF1000-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/4696-9-0x00007FFA9F430000-0x00007FFA9FEF1000-memory.dmp

memory/1736-10-0x00007FFA9F430000-0x00007FFA9FEF1000-memory.dmp

memory/4696-11-0x00007FFA9F430000-0x00007FFA9FEF1000-memory.dmp

memory/4696-12-0x000000001CB00000-0x000000001CB50000-memory.dmp

memory/4696-13-0x000000001CC10000-0x000000001CCC2000-memory.dmp

memory/4696-14-0x00007FFA9F430000-0x00007FFA9FEF1000-memory.dmp