quasar | b893220d33f9b8a0f98702bb577e4459792253ae651bdc18a93145ccd008af54

General

Target

0x00080000000174cc-36.exe
Size

534KB
MD5

81b2c5c64951b603480d40d321540ff2
SHA1

314199ad92baeb203f5555ff3814e9b7a4f226f8
SHA256

b893220d33f9b8a0f98702bb577e4459792253ae651bdc18a93145ccd008af54
SHA512

3a57655bf7aa18a34364659553aad26a3d5b8946b957441f5fedebab5936b6bb2c71c6337837ead486a001b6a9227437cc5c4ec4a5de627f0e2db10dc6afdea6
SSDEEP

6144:78fG1BIgrx8kFYLTiMkbQEju0KoivMbi7DSVmh6Khe535h+GofOlblwXH/Gy3V8O:HPx7FYPiMQRcRDF4uy33ofAblwX2S

Score

10^/10

quasar venomrat office04 discovery evasion rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

146.190.29.250:7812

Mutex

VNM_MUTEX_h1gQxrpyccCFZq7JPS

Attributes

encryption_key
V5fWyT4tQqXFouaUUxe2
install_name
Windows Security.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Update
subdirectory
SubDir34

Signatures

Contains code to disable Windows Defender 4 IoCs

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

Processes:

resource	yara_rule
behavioral1/memory/1860-1-0x0000000000DE0000-0x0000000000E6C000-memory.dmp	disable_win_def
\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe	disable_win_def
behavioral1/memory/2780-10-0x0000000000F70000-0x0000000000FFC000-memory.dmp	disable_win_def
behavioral1/memory/1756-29-0x00000000001E0000-0x000000000026C000-memory.dmp	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

0x00080000000174cc-36.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	0x00080000000174cc-36.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	0x00080000000174cc-36.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	0x00080000000174cc-36.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	0x00080000000174cc-36.exe

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

Quasar payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1860-1-0x0000000000DE0000-0x0000000000E6C000-memory.dmp	family_quasar
\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe	family_quasar
behavioral1/memory/2780-10-0x0000000000F70000-0x0000000000FFC000-memory.dmp	family_quasar
behavioral1/memory/1756-29-0x00000000001E0000-0x000000000026C000-memory.dmp	family_quasar

VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat
Venomrat family
venomrat
Executes dropped EXE 1 IoCs

Processes:

Windows Security.exe

pid process

2780 Windows Security.exe
Loads dropped DLL 1 IoCs

Processes:

0x00080000000174cc-36.exe

pid process

1860 0x00080000000174cc-36.exe

pid	process
2780	Windows Security.exe

pid	process
1860	0x00080000000174cc-36.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

0x00080000000174cc-36.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	0x00080000000174cc-36.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	0x00080000000174cc-36.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
2	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

0x00080000000174cc-36.exeWindows Security.exeschtasks.exePING.EXE0x00080000000174cc-36.exeschtasks.exepowershell.execmd.execmd.execmd.exechcp.com

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0x00080000000174cc-36.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windows Security.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0x00080000000174cc-36.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs
Adversaries may check for Internet connectivity on compromised systems.
discovery

Internet Connection Discovery
T1016.001

Processes:

PING.EXE

pid process

1348 PING.EXE
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1348 PING.EXE
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

2732 schtasks.exe
2496 schtasks.exe

pid	process
1348	PING.EXE

pid	process
1348	PING.EXE

pid	process
2732	schtasks.exe
2496	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exe0x00080000000174cc-36.exe0x00080000000174cc-36.exe

pid	process
3068	powershell.exe
1860	0x00080000000174cc-36.exe
1860	0x00080000000174cc-36.exe
1860	0x00080000000174cc-36.exe
1860	0x00080000000174cc-36.exe
1860	0x00080000000174cc-36.exe
1860	0x00080000000174cc-36.exe
1860	0x00080000000174cc-36.exe
1756	0x00080000000174cc-36.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

0x00080000000174cc-36.exeWindows Security.exepowershell.exe0x00080000000174cc-36.exe

description	pid	process
Token: SeDebugPrivilege	1860	0x00080000000174cc-36.exe
Token: SeDebugPrivilege	2780	Windows Security.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	2780	Windows Security.exe
Token: SeDebugPrivilege	1756	0x00080000000174cc-36.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Security.exe

pid process

2780 Windows Security.exe

pid	process
2780	Windows Security.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

0x00080000000174cc-36.exeWindows Security.execmd.execmd.exe

description	pid	process	target process
PID 1860 wrote to memory of 2732	1860	0x00080000000174cc-36.exe	schtasks.exe
PID 1860 wrote to memory of 2732	1860	0x00080000000174cc-36.exe	schtasks.exe
PID 1860 wrote to memory of 2732	1860	0x00080000000174cc-36.exe	schtasks.exe
PID 1860 wrote to memory of 2732	1860	0x00080000000174cc-36.exe	schtasks.exe
PID 1860 wrote to memory of 2780	1860	0x00080000000174cc-36.exe	Windows Security.exe
PID 1860 wrote to memory of 2780	1860	0x00080000000174cc-36.exe	Windows Security.exe
PID 1860 wrote to memory of 2780	1860	0x00080000000174cc-36.exe	Windows Security.exe
PID 1860 wrote to memory of 2780	1860	0x00080000000174cc-36.exe	Windows Security.exe
PID 1860 wrote to memory of 3068	1860	0x00080000000174cc-36.exe	powershell.exe
PID 1860 wrote to memory of 3068	1860	0x00080000000174cc-36.exe	powershell.exe
PID 1860 wrote to memory of 3068	1860	0x00080000000174cc-36.exe	powershell.exe
PID 1860 wrote to memory of 3068	1860	0x00080000000174cc-36.exe	powershell.exe
PID 2780 wrote to memory of 2496	2780	Windows Security.exe	schtasks.exe
PID 2780 wrote to memory of 2496	2780	Windows Security.exe	schtasks.exe
PID 2780 wrote to memory of 2496	2780	Windows Security.exe	schtasks.exe
PID 2780 wrote to memory of 2496	2780	Windows Security.exe	schtasks.exe
PID 1860 wrote to memory of 320	1860	0x00080000000174cc-36.exe	cmd.exe
PID 1860 wrote to memory of 320	1860	0x00080000000174cc-36.exe	cmd.exe
PID 1860 wrote to memory of 320	1860	0x00080000000174cc-36.exe	cmd.exe
PID 1860 wrote to memory of 320	1860	0x00080000000174cc-36.exe	cmd.exe
PID 320 wrote to memory of 604	320	cmd.exe	cmd.exe
PID 320 wrote to memory of 604	320	cmd.exe	cmd.exe
PID 320 wrote to memory of 604	320	cmd.exe	cmd.exe
PID 320 wrote to memory of 604	320	cmd.exe	cmd.exe
PID 1860 wrote to memory of 1128	1860	0x00080000000174cc-36.exe	cmd.exe
PID 1860 wrote to memory of 1128	1860	0x00080000000174cc-36.exe	cmd.exe
PID 1860 wrote to memory of 1128	1860	0x00080000000174cc-36.exe	cmd.exe
PID 1860 wrote to memory of 1128	1860	0x00080000000174cc-36.exe	cmd.exe
PID 1128 wrote to memory of 2852	1128	cmd.exe	chcp.com
PID 1128 wrote to memory of 2852	1128	cmd.exe	chcp.com
PID 1128 wrote to memory of 2852	1128	cmd.exe	chcp.com
PID 1128 wrote to memory of 2852	1128	cmd.exe	chcp.com
PID 1128 wrote to memory of 1348	1128	cmd.exe	PING.EXE
PID 1128 wrote to memory of 1348	1128	cmd.exe	PING.EXE
PID 1128 wrote to memory of 1348	1128	cmd.exe	PING.EXE
PID 1128 wrote to memory of 1348	1128	cmd.exe	PING.EXE
PID 1128 wrote to memory of 1756	1128	cmd.exe	0x00080000000174cc-36.exe
PID 1128 wrote to memory of 1756	1128	cmd.exe	0x00080000000174cc-36.exe
PID 1128 wrote to memory of 1756	1128	cmd.exe	0x00080000000174cc-36.exe
PID 1128 wrote to memory of 1756	1128	cmd.exe	0x00080000000174cc-36.exe

C:\Users\Admin\AppData\Local\Temp\0x00080000000174cc-36.exe
"C:\Users\Admin\AppData\Local\Temp\0x00080000000174cc-36.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Loads dropped DLL
- Windows security modification
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1860
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\0x00080000000174cc-36.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2732
- C:\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe
  "C:\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2496
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:320
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    - System Location Discovery: System Language Discovery
    PID:604
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\SyOvWRy1i5Ah.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1128
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2852
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1348
- - C:\Users\Admin\AppData\Local\Temp\0x00080000000174cc-36.exe
    "C:\Users\Admin\AppData\Local\Temp\0x00080000000174cc-36.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1756

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\SyOvWRy1i5Ah.bat

Filesize
218B

MD5
c15fd7d9ef4316d70cb8ed4d0808d341

SHA1
fd19cb3a01d27dc83716a7ddc4d5c675d96ccaee

SHA256
c4ca1adacb9c1aac0d2d75b73de18744f59e4b0c1a172f1999ad3228ab6134b6

SHA512
82f036b2cd2a3a78c970b2790879c39dfcbad29240b499c818e3893159497d075bcd9b0495221b8c3d0a789b9396f61bd6d830c876e238c4e1191480fd4f94e8

Download Submit
\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe

Filesize
534KB

MD5
81b2c5c64951b603480d40d321540ff2

SHA1
314199ad92baeb203f5555ff3814e9b7a4f226f8

SHA256
b893220d33f9b8a0f98702bb577e4459792253ae651bdc18a93145ccd008af54

SHA512
3a57655bf7aa18a34364659553aad26a3d5b8946b957441f5fedebab5936b6bb2c71c6337837ead486a001b6a9227437cc5c4ec4a5de627f0e2db10dc6afdea6

Download Submit
memory/1756-29-0x00000000001E0000-0x000000000026C000-memory.dmp

Filesize
560KB

Download
memory/1860-1-0x0000000000DE0000-0x0000000000E6C000-memory.dmp

Filesize
560KB

Download
memory/1860-2-0x00000000740E0000-0x00000000747CE000-memory.dmp

Filesize
6.9MB

Download
memory/1860-28-0x00000000740E0000-0x00000000747CE000-memory.dmp

Filesize
6.9MB

Download
memory/1860-0-0x00000000740EE000-0x00000000740EF000-memory.dmp

Filesize
4KB

Download
memory/1860-16-0x00000000740EE000-0x00000000740EF000-memory.dmp

Filesize
4KB

Download
memory/1860-17-0x00000000740E0000-0x00000000747CE000-memory.dmp

Filesize
6.9MB

Download
memory/2780-12-0x00000000740E0000-0x00000000747CE000-memory.dmp

Filesize
6.9MB

Download
memory/2780-18-0x00000000740E0000-0x00000000747CE000-memory.dmp

Filesize
6.9MB

Download
memory/2780-10-0x0000000000F70000-0x0000000000FFC000-memory.dmp

Filesize
560KB

Download
memory/2780-11-0x00000000740E0000-0x00000000747CE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads