quasar | b893220d33f9b8a0f98702bb577e4459792253ae651bdc18a93145ccd008af54

Analysis

max time kernel
141s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-11-2024 15:22

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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

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 2 IoCs

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

Processes:

resource	yara_rule
behavioral2/memory/3296-1-0x0000000000B60000-0x0000000000BEC000-memory.dmp	disable_win_def
C:\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe	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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	0x00080000000174cc-36.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	0x00080000000174cc-36.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	0x00080000000174cc-36.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	0x00080000000174cc-36.exe

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3296-1-0x0000000000B60000-0x0000000000BEC000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir34\Windows Security.exe	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

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

Processes:

0x00080000000174cc-36.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	0x00080000000174cc-36.exe

Executes dropped EXE 1 IoCs

Processes:

Windows Security.exe

pid process

1496 Windows Security.exe

pid	process
1496	Windows Security.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

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

System Information Discovery
T1082

flow	ioc
13	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:

PING.EXE0x00080000000174cc-36.exeschtasks.exepowershell.exeschtasks.execmd.execmd.exechcp.com0x00080000000174cc-36.exeWindows Security.execmd.exe

description	ioc	process
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	schtasks.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
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	cmd.exe

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

1372 PING.EXE
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1372 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

3720 schtasks.exe
3840 schtasks.exe

pid	process
1372	PING.EXE

pid	process
1372	PING.EXE

pid	process
3720	schtasks.exe
3840	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exe0x00080000000174cc-36.exe0x00080000000174cc-36.exe

pid	process
1812	powershell.exe
1812	powershell.exe
3296	0x00080000000174cc-36.exe
3296	0x00080000000174cc-36.exe
3296	0x00080000000174cc-36.exe
3296	0x00080000000174cc-36.exe
3296	0x00080000000174cc-36.exe
3296	0x00080000000174cc-36.exe
3296	0x00080000000174cc-36.exe
2368	0x00080000000174cc-36.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

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

description	pid	process
Token: SeDebugPrivilege	3296	0x00080000000174cc-36.exe
Token: SeDebugPrivilege	1812	powershell.exe
Token: SeDebugPrivilege	1496	Windows Security.exe
Token: SeDebugPrivilege	1496	Windows Security.exe
Token: SeDebugPrivilege	2368	0x00080000000174cc-36.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Security.exe

pid process

1496 Windows Security.exe

pid	process
1496	Windows Security.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

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

description	pid	process	target process
PID 3296 wrote to memory of 3720	3296	0x00080000000174cc-36.exe	schtasks.exe
PID 3296 wrote to memory of 3720	3296	0x00080000000174cc-36.exe	schtasks.exe
PID 3296 wrote to memory of 3720	3296	0x00080000000174cc-36.exe	schtasks.exe
PID 3296 wrote to memory of 1496	3296	0x00080000000174cc-36.exe	Windows Security.exe
PID 3296 wrote to memory of 1496	3296	0x00080000000174cc-36.exe	Windows Security.exe
PID 3296 wrote to memory of 1496	3296	0x00080000000174cc-36.exe	Windows Security.exe
PID 3296 wrote to memory of 1812	3296	0x00080000000174cc-36.exe	powershell.exe
PID 3296 wrote to memory of 1812	3296	0x00080000000174cc-36.exe	powershell.exe
PID 3296 wrote to memory of 1812	3296	0x00080000000174cc-36.exe	powershell.exe
PID 1496 wrote to memory of 3840	1496	Windows Security.exe	schtasks.exe
PID 1496 wrote to memory of 3840	1496	Windows Security.exe	schtasks.exe
PID 1496 wrote to memory of 3840	1496	Windows Security.exe	schtasks.exe
PID 3296 wrote to memory of 1664	3296	0x00080000000174cc-36.exe	cmd.exe
PID 3296 wrote to memory of 1664	3296	0x00080000000174cc-36.exe	cmd.exe
PID 3296 wrote to memory of 1664	3296	0x00080000000174cc-36.exe	cmd.exe
PID 1664 wrote to memory of 2192	1664	cmd.exe	cmd.exe
PID 1664 wrote to memory of 2192	1664	cmd.exe	cmd.exe
PID 1664 wrote to memory of 2192	1664	cmd.exe	cmd.exe
PID 3296 wrote to memory of 444	3296	0x00080000000174cc-36.exe	cmd.exe
PID 3296 wrote to memory of 444	3296	0x00080000000174cc-36.exe	cmd.exe
PID 3296 wrote to memory of 444	3296	0x00080000000174cc-36.exe	cmd.exe
PID 444 wrote to memory of 3904	444	cmd.exe	chcp.com
PID 444 wrote to memory of 3904	444	cmd.exe	chcp.com
PID 444 wrote to memory of 3904	444	cmd.exe	chcp.com
PID 444 wrote to memory of 1372	444	cmd.exe	PING.EXE
PID 444 wrote to memory of 1372	444	cmd.exe	PING.EXE
PID 444 wrote to memory of 1372	444	cmd.exe	PING.EXE
PID 444 wrote to memory of 2368	444	cmd.exe	0x00080000000174cc-36.exe
PID 444 wrote to memory of 2368	444	cmd.exe	0x00080000000174cc-36.exe
PID 444 wrote to memory of 2368	444	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
- Checks computer location settings
- Windows security modification
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3296
- 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:3720
- 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:1496
- - 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:3840
- 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:1812
- 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:1664
- - 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:2192
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\YefzkwG5mqtG.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:444
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3904
- - 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:1372
- - 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:2368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\0x00080000000174cc-36.exe.log

Filesize
1KB

MD5
10eab9c2684febb5327b6976f2047587

SHA1
a12ed54146a7f5c4c580416aecb899549712449e

SHA256
f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928

SHA512
7e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50

Download Submit
C:\Users\Admin\AppData\Local\Temp\YefzkwG5mqtG.bat

Filesize
218B

MD5
69e7eed08b1ded83051b4a44492d5f6e

SHA1
f5f38e993d151a3f94e84d366041a69ed9222f9c

SHA256
1fa034af2f000e5f618b1250d34290982c64fa938699ab08ee5bf6fbee4a71c4

SHA512
4179426b94d68131f74a25204cd739f1e7d6c6140fba571e364104a24e3e0930e27f0eafa2e873fa4758108a9c1ab723864a6af7632f1fc1efbc5a923a604dff

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jyzqbcp1.ww1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
534KB

MD5
81b2c5c64951b603480d40d321540ff2

SHA1
314199ad92baeb203f5555ff3814e9b7a4f226f8

SHA256
b893220d33f9b8a0f98702bb577e4459792253ae651bdc18a93145ccd008af54

SHA512
3a57655bf7aa18a34364659553aad26a3d5b8946b957441f5fedebab5936b6bb2c71c6337837ead486a001b6a9227437cc5c4ec4a5de627f0e2db10dc6afdea6

Download Submit
memory/1496-13-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1496-64-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1496-63-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1496-35-0x0000000006F40000-0x0000000006F4A000-memory.dmp

Filesize
40KB

Download
memory/1496-14-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1812-15-0x0000000004920000-0x0000000004956000-memory.dmp

Filesize
216KB

Download
memory/1812-32-0x0000000005F00000-0x0000000005F1E000-memory.dmp

Filesize
120KB

Download
memory/1812-62-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1812-16-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1812-17-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1812-18-0x0000000005000000-0x0000000005628000-memory.dmp

Filesize
6.2MB

Download
memory/1812-19-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/1812-21-0x0000000005720000-0x0000000005786000-memory.dmp

Filesize
408KB

Download
memory/1812-20-0x0000000004F40000-0x0000000004F62000-memory.dmp

Filesize
136KB

Download
memory/1812-59-0x0000000007540000-0x0000000007548000-memory.dmp

Filesize
32KB

Download
memory/1812-31-0x0000000005900000-0x0000000005C54000-memory.dmp

Filesize
3.3MB

Download
memory/1812-55-0x0000000007450000-0x000000000745E000-memory.dmp

Filesize
56KB

Download
memory/1812-33-0x0000000005F90000-0x0000000005FDC000-memory.dmp

Filesize
304KB

Download
memory/1812-58-0x0000000007560000-0x000000000757A000-memory.dmp

Filesize
104KB

Download
memory/1812-36-0x00000000064C0000-0x00000000064F2000-memory.dmp

Filesize
200KB

Download
memory/1812-37-0x0000000070520000-0x000000007056C000-memory.dmp

Filesize
304KB

Download
memory/1812-47-0x0000000006ED0000-0x0000000006EEE000-memory.dmp

Filesize
120KB

Download
memory/1812-48-0x0000000006EF0000-0x0000000006F93000-memory.dmp

Filesize
652KB

Download
memory/1812-49-0x0000000007860000-0x0000000007EDA000-memory.dmp

Filesize
6.5MB

Download
memory/1812-50-0x0000000007220000-0x000000000723A000-memory.dmp

Filesize
104KB

Download
memory/1812-57-0x0000000007460000-0x0000000007474000-memory.dmp

Filesize
80KB

Download
memory/1812-52-0x0000000007290000-0x000000000729A000-memory.dmp

Filesize
40KB

Download
memory/1812-53-0x00000000074A0000-0x0000000007536000-memory.dmp

Filesize
600KB

Download
memory/1812-54-0x0000000007420000-0x0000000007431000-memory.dmp

Filesize
68KB

Download
memory/3296-6-0x00000000062D0000-0x00000000062E2000-memory.dmp

Filesize
72KB

Download
memory/3296-56-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/3296-51-0x000000007512E000-0x000000007512F000-memory.dmp

Filesize
4KB

Download
memory/3296-5-0x00000000055C0000-0x0000000005626000-memory.dmp

Filesize
408KB

Download
memory/3296-7-0x0000000006810000-0x000000000684C000-memory.dmp

Filesize
240KB

Download
memory/3296-0-0x000000007512E000-0x000000007512F000-memory.dmp

Filesize
4KB

Download
memory/3296-4-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/3296-3-0x0000000005640000-0x00000000056D2000-memory.dmp

Filesize
584KB

Download
memory/3296-69-0x0000000075120000-0x00000000758D0000-memory.dmp

Filesize
7.7MB

Download
memory/3296-2-0x0000000005B00000-0x00000000060A4000-memory.dmp

Filesize
5.6MB

Download
memory/3296-1-0x0000000000B60000-0x0000000000BEC000-memory.dmp

Filesize
560KB

Download