quasar | 50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90

Analysis

max time kernel
9s
max time network
26s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
10-03-2022 18:45

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe
Size

6.2MB
MD5

942b78bcd8a5aa6d10436832b1260671
SHA1

e35e87e58f94e304dd0b97e9b85c6cb30146978d
SHA256

50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90
SHA512

89baba3a305d1d6969b68e4f63c294a861fc755f65ac6d0f5a67f7d6b7aa26cd852f78ce0441af489a70991a9cd0887388687d89efd0f1fb95fb316490d030e3

Score

10^/10

quasar windows security notification spyware trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Security Notification

minecraftgaming009-61323.portmap.io:61323

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes

encryption_key
1oSvdU99XhcwnNYl3rB8
install_name
Windows Security Notification.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Security Notification
subdirectory
SubDir

Signatures

Contains code to disable Windows Defender 5 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/files/0x000700000001e83c-142.dat	disable_win_def
behavioral2/files/0x000700000001e83c-141.dat	disable_win_def
behavioral2/memory/1408-147-0x0000000000670000-0x0000000000706000-memory.dmp	disable_win_def
behavioral2/files/0x000500000001e8c6-174.dat	disable_win_def
behavioral2/files/0x000500000001e8c6-173.dat	disable_win_def

Quasar Payload 5 IoCs

resource	yara_rule
behavioral2/files/0x000700000001e83c-142.dat	family_quasar
behavioral2/files/0x000700000001e83c-141.dat	family_quasar
behavioral2/memory/1408-147-0x0000000000670000-0x0000000000706000-memory.dmp	family_quasar
behavioral2/files/0x000500000001e8c6-174.dat	family_quasar
behavioral2/files/0x000500000001e8c6-173.dat	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Executes dropped EXE 5 IoCs

pid	Process
1160	Uawisdwhppyu.exe
3828	Knfk.exe
3976	Rtsveoxqatvjs.exe
536	Mtwgkvm.exe
1408	Lzmicakkfbw.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1324	3976	WerFault.exe	81
4716	4260	WerFault.exe	97

Creates scheduled task(s) 1 TTPs 4 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1072	schtasks.exe
4168	schtasks.exe
2128	schtasks.exe
3092	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3976	Rtsveoxqatvjs.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3976	Rtsveoxqatvjs.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 1160	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	79
PID 2620 wrote to memory of 1160	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	79
PID 2620 wrote to memory of 1160	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	79
PID 2620 wrote to memory of 3828	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	80
PID 2620 wrote to memory of 3828	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	80
PID 2620 wrote to memory of 3828	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	80
PID 2620 wrote to memory of 3976	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	81
PID 2620 wrote to memory of 3976	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	81
PID 2620 wrote to memory of 3976	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	81
PID 2620 wrote to memory of 536	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	82
PID 2620 wrote to memory of 536	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	82
PID 2620 wrote to memory of 1408	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	83
PID 2620 wrote to memory of 1408	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	83
PID 2620 wrote to memory of 1408	2620	50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe	83

C:\Users\Admin\AppData\Local\Temp\50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe
"C:\Users\Admin\AppData\Local\Temp\50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Users\Admin\AppData\Local\Temp\Uawisdwhppyu.exe
  "C:\Users\Admin\AppData\Local\Temp\Uawisdwhppyu.exe"
  2⤵
  - Executes dropped EXE
  PID:1160
- C:\Users\Admin\AppData\Local\Temp\Knfk.exe
  "C:\Users\Admin\AppData\Local\Temp\Knfk.exe"
  2⤵
  - Executes dropped EXE
  PID:3828
- - C:\Users\Admin\AppData\Local\Temp\RtkBtManServ.exe
    "C:\Users\Admin\AppData\Local\Temp\RtkBtManServ.exe" ZhXl39BlhP84+Y4kurA8wpehxxqA0X22IMYZ6Vpiqs4EpeebWszwq3L5jgvisNmyvGbyVAfjjb/WhkVRHM1jSY9bDQBPQUlA+KOt+q65oQzJt9yxASNarn9KPWpl7VpeJNaoB2sh/pMWGpfd1hNghc5haR0kkZkRiX8yULrHRxs=
    3⤵
    PID:2208
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\dav.bat"
    3⤵
    PID:2368
  - - C:\Windows\SysWOW64\reg.exe
      reg delete "HKLM\Software\Policies\Microsoft\Windows Defender" /f
      4⤵
      PID:5036
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender" /v "DisableAntiSpyware" /t REG_DWORD /d "1" /f
      4⤵
      PID:4660
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender" /v "DisableAntiVirus" /t REG_DWORD /d "1" /f
      4⤵
      PID:636
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpEnablePus" /t REG_DWORD /d "0" /f
      4⤵
      PID:928
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableBehaviorMonitoring" /t REG_DWORD /d "1" /f
      4⤵
      PID:1460
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableIOAVProtection" /t REG_DWORD /d "1" /f
      4⤵
      PID:1808
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableOnAccessProtection" /t REG_DWORD /d "1" /f
      4⤵
      PID:908
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableRealtimeMonitoring" /t REG_DWORD /d "1" /f
      4⤵
      PID:1300
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableScanOnRealtimeEnable" /t REG_DWORD /d "1" /f
      4⤵
      PID:2260
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Reporting" /v "DisableEnhancedNotifications" /t REG_DWORD /d "1" /f
      4⤵
      PID:1456
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "DisableBlockAtFirstSeen" /t REG_DWORD /d "1" /f┬┤
      4⤵
      PID:2272
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SpynetReporting" /t REG_DWORD /d "0" /f
      4⤵
      PID:2060
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SubmitSamplesConsent" /t REG_DWORD /d "2" /f
      4⤵
      PID:3864
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderApiLogger" /v "Start" /t REG_DWORD /d "0" /f
      4⤵
      PID:2968
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderAuditLogger" /v "Start" /t REG_DWORD /d "0" /f
      4⤵
      PID:4832
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Change /TN "Microsoft\Windows\ExploitGuard\ExploitGuard MDM policy Refresh" /Disable
      4⤵
      PID:3060
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /Disable
      4⤵
      PID:3648
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /Disable
      4⤵
      PID:3444
- C:\Users\Admin\AppData\Local\Temp\Rtsveoxqatvjs.exe
  "C:\Users\Admin\AppData\Local\Temp\Rtsveoxqatvjs.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3976
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3976 -s 1684
    3⤵
    - Program crash
    PID:1324
- C:\Users\Admin\AppData\Local\Temp\Mtwgkvm.exe
  "C:\Users\Admin\AppData\Local\Temp\Mtwgkvm.exe"
  2⤵
  - Executes dropped EXE
  PID:536
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Steam" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Mtwgkvm.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4168
- - C:\Users\Admin\AppData\Roaming\SubDir\Steam.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Steam.exe"
    3⤵
    PID:1576
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Steam" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Steam.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:3092
- C:\Users\Admin\AppData\Local\Temp\Lzmicakkfbw.exe
  "C:\Users\Admin\AppData\Local\Temp\Lzmicakkfbw.exe"
  2⤵
  - Executes dropped EXE
  PID:1408
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Security Notification" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Lzmicakkfbw.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2128
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Get-MpPreference -verbose
    3⤵
    PID:3084
- - C:\Windows\SysWOW64\SubDir\Windows Security Notification.exe
    "C:\Windows\SysWOW64\SubDir\Windows Security Notification.exe"
    3⤵
    PID:4260
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Windows Security Notification" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\Windows Security Notification.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:1072
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\e9Y2mEcb30PK.bat" "
      4⤵
      PID:2456
    - - C:\Windows\SysWOW64\chcp.com
        
        chcp 65001
        5⤵
        
        PID:552
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4260 -s 2256
      4⤵
      Program crash
      PID:4716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3976 -ip 3976
1⤵
PID:592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4260 -ip 4260
1⤵
PID:2240

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/536-143-0x0000000000950000-0x0000000000974000-memory.dmp

Filesize
144KB

Download
memory/536-160-0x000000001CCE0000-0x000000001CCE2000-memory.dmp

Filesize
8KB

Download
memory/536-145-0x00007FFB177A0000-0x00007FFB18261000-memory.dmp

Filesize
10.8MB

Download
memory/536-166-0x000000001C980000-0x000000001C9BC000-memory.dmp

Filesize
240KB

Download
memory/536-164-0x00000000028B0000-0x00000000028C2000-memory.dmp

Filesize
72KB

Download
memory/1160-163-0x0000000004E00000-0x0000000004E92000-memory.dmp

Filesize
584KB

Download
memory/1160-162-0x0000000004E00000-0x0000000004E92000-memory.dmp

Filesize
584KB

Download
memory/1160-149-0x0000000074B60000-0x0000000075310000-memory.dmp

Filesize
7.7MB

Download
memory/1160-152-0x0000000004EE0000-0x0000000004F72000-memory.dmp

Filesize
584KB

Download
memory/1160-156-0x0000000004EC0000-0x0000000004ECA000-memory.dmp

Filesize
40KB

Download
memory/1160-148-0x0000000000290000-0x0000000000642000-memory.dmp

Filesize
3.7MB

Download
memory/1408-150-0x00000000055B0000-0x0000000005B54000-memory.dmp

Filesize
5.6MB

Download
memory/1408-147-0x0000000000670000-0x0000000000706000-memory.dmp

Filesize
600KB

Download
memory/1408-154-0x0000000004F40000-0x0000000004F41000-memory.dmp

Filesize
4KB

Download
memory/1408-165-0x0000000005EE0000-0x0000000005EF2000-memory.dmp

Filesize
72KB

Download
memory/1408-157-0x0000000074B60000-0x0000000075310000-memory.dmp

Filesize
7.7MB

Download
memory/1408-167-0x0000000006310000-0x000000000634C000-memory.dmp

Filesize
240KB

Download
memory/1576-178-0x00007FFB177A0000-0x00007FFB18261000-memory.dmp

Filesize
10.8MB

Download
memory/1576-179-0x000000001C950000-0x000000001C952000-memory.dmp

Filesize
8KB

Download
memory/2208-185-0x00000202227E0000-0x00000202227E2000-memory.dmp

Filesize
8KB

Download
memory/2208-181-0x00000202225B0000-0x0000020222626000-memory.dmp

Filesize
472KB

Download
memory/2208-193-0x0000020222720000-0x0000020222742000-memory.dmp

Filesize
136KB

Download
memory/2208-172-0x00000202068B0000-0x0000020206B8A000-memory.dmp

Filesize
2.9MB

Download
memory/2208-175-0x00007FFB177A0000-0x00007FFB18261000-memory.dmp

Filesize
10.8MB

Download
memory/2620-130-0x0000000000B60000-0x0000000001196000-memory.dmp

Filesize
6.2MB

Download
memory/2620-131-0x00007FFB177A0000-0x00007FFB18261000-memory.dmp

Filesize
10.8MB

Download
memory/2620-132-0x00000000031D0000-0x00000000031D2000-memory.dmp

Filesize
8KB

Download
memory/3084-184-0x0000000002D50000-0x0000000002D51000-memory.dmp

Filesize
4KB

Download
memory/3084-187-0x0000000002D52000-0x0000000002D53000-memory.dmp

Filesize
4KB

Download
memory/3084-194-0x0000000002D55000-0x0000000002D57000-memory.dmp

Filesize
8KB

Download
memory/3084-190-0x0000000006510000-0x000000000652E000-memory.dmp

Filesize
120KB

Download
memory/3084-180-0x0000000001500000-0x0000000001536000-memory.dmp

Filesize
216KB

Download
memory/3084-189-0x0000000005F50000-0x0000000005FB6000-memory.dmp

Filesize
408KB

Download
memory/3084-182-0x00000000057B0000-0x0000000005DD8000-memory.dmp

Filesize
6.2MB

Download
memory/3084-183-0x0000000074B60000-0x0000000075310000-memory.dmp

Filesize
7.7MB

Download
memory/3084-188-0x0000000006020000-0x0000000006042000-memory.dmp

Filesize
136KB

Download
memory/3828-158-0x0000000074B60000-0x0000000075310000-memory.dmp

Filesize
7.7MB

Download
memory/3828-151-0x0000000000510000-0x000000000080E000-memory.dmp

Filesize
3.0MB

Download
memory/3828-146-0x0000000000510000-0x000000000080E000-memory.dmp

Filesize
3.0MB

Download
memory/3828-161-0x0000000004DD0000-0x0000000004DD1000-memory.dmp

Filesize
4KB

Download
memory/3828-155-0x0000000005050000-0x00000000050B6000-memory.dmp

Filesize
408KB

Download
memory/3976-144-0x0000000000FF0000-0x0000000000FF8000-memory.dmp

Filesize
32KB

Download
memory/3976-159-0x0000000074B60000-0x0000000075310000-memory.dmp

Filesize
7.7MB

Download
memory/3976-153-0x0000000005A60000-0x0000000005A61000-memory.dmp

Filesize
4KB

Download
memory/4260-177-0x00000000057E0000-0x0000000005D84000-memory.dmp

Filesize
5.6MB

Download
memory/4260-176-0x0000000074B60000-0x0000000075310000-memory.dmp

Filesize
7.7MB

Download