quasar | e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8

General

Target

e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe
Size

590KB
MD5

f7d70adb404cf63562d6541fce16ee94
SHA1

7c855ae562c54c6747c682f9403ff902308deeb1
SHA256

e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8
SHA512

aed0a69aa45018197f04eec259ab4954f0ecd6f0e309a745346282cc46efd4e6567f920a3cfa39326082abff40de6ad932150ae5f6207e1a580d87343410d519
SSDEEP

6144:kU9/iRCAm9wyitWVSIyIXQR3YQJrjYPUotecWo7vMyYp5lQj64cmX3Hrv9Otawza:i3ynm3RsPj7WYUxp+TvotLzAFLBz8LS

Score

10^/10

quasar venomrat rat evasion persistence rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

RAT

C2

23.105.131.178:7812

Mutex

VNM_MUTEX_gdy9bWxR0te3WgTRnI

Attributes

encryption_key
MDXzdQumRqZGIeya7nG9
install_name
Windows Defender Security.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Update
subdirectory
Microsoft

Signatures

Contains code to disable Windows Defender 8 IoCs

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

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\Windows Defender Security.exe	disable_win_def
C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe	disable_win_def
C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe	disable_win_def
behavioral1/memory/604-62-0x0000000000A90000-0x0000000000B1C000-memory.dmp	disable_win_def
\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe	disable_win_def
C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe	disable_win_def
C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe	disable_win_def
behavioral1/memory/1396-69-0x00000000003E0000-0x000000000046C000-memory.dmp	disable_win_def

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

evasion trojan

Modify Registry

T1112

Modify Existing Service

T1031

Disabling Security Tools

T1089

Processes:

Windows Defender Security.exe

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

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

Quasar payload 8 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\Windows Defender Security.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe	family_quasar
behavioral1/memory/604-62-0x0000000000A90000-0x0000000000B1C000-memory.dmp	family_quasar
\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe	family_quasar
behavioral1/memory/1396-69-0x00000000003E0000-0x000000000046C000-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
Executes dropped EXE 2 IoCs

Processes:

Windows Defender Security.exeWindows Defender Security.exe

pid process

604 Windows Defender Security.exe
1396 Windows Defender Security.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1572 cmd.exe
Loads dropped DLL 2 IoCs

Processes:

e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exeWindows Defender Security.exe

pid process

2040 e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe
604 Windows Defender Security.exe

pid	process
604	Windows Defender Security.exe
1396	Windows Defender Security.exe

pid	process
1572	cmd.exe

pid	process
2040	e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe
604	Windows Defender Security.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

Windows Defender Security.exe

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Windows Defender Security.exeWindows Defender Security.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows Defender Security.exe\""	Windows Defender Security.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows Defender Security.exe\""	Windows Defender Security.exe

Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 ip-api.com
4 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
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1756 schtasks.exe
1688 schtasks.exe

flow	ioc
2	ip-api.com
4	ip-api.com

pid	process
1756	schtasks.exe
1688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exeWindows Defender Security.exe

pid	process
908	powershell.exe
604	Windows Defender Security.exe
604	Windows Defender Security.exe
604	Windows Defender Security.exe
604	Windows Defender Security.exe
604	Windows Defender Security.exe
604	Windows Defender Security.exe
604	Windows Defender Security.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Windows Defender Security.exeWindows Defender Security.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	604	Windows Defender Security.exe
Token: SeDebugPrivilege	1396	Windows Defender Security.exe
Token: SeDebugPrivilege	1396	Windows Defender Security.exe
Token: SeDebugPrivilege	908	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Defender Security.exe

pid process

1396 Windows Defender Security.exe

pid	process
1396	Windows Defender Security.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exeWindows Defender Security.exeWindows Defender Security.execmd.execmd.exe

description	pid	process	target process
PID 2040 wrote to memory of 604	2040	e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe	Windows Defender Security.exe
PID 2040 wrote to memory of 604	2040	e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe	Windows Defender Security.exe
PID 2040 wrote to memory of 604	2040	e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe	Windows Defender Security.exe
PID 2040 wrote to memory of 604	2040	e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe	Windows Defender Security.exe
PID 604 wrote to memory of 1756	604	Windows Defender Security.exe	schtasks.exe
PID 604 wrote to memory of 1756	604	Windows Defender Security.exe	schtasks.exe
PID 604 wrote to memory of 1756	604	Windows Defender Security.exe	schtasks.exe
PID 604 wrote to memory of 1756	604	Windows Defender Security.exe	schtasks.exe
PID 604 wrote to memory of 1396	604	Windows Defender Security.exe	Windows Defender Security.exe
PID 604 wrote to memory of 1396	604	Windows Defender Security.exe	Windows Defender Security.exe
PID 604 wrote to memory of 1396	604	Windows Defender Security.exe	Windows Defender Security.exe
PID 604 wrote to memory of 1396	604	Windows Defender Security.exe	Windows Defender Security.exe
PID 1396 wrote to memory of 1688	1396	Windows Defender Security.exe	schtasks.exe
PID 1396 wrote to memory of 1688	1396	Windows Defender Security.exe	schtasks.exe
PID 1396 wrote to memory of 1688	1396	Windows Defender Security.exe	schtasks.exe
PID 1396 wrote to memory of 1688	1396	Windows Defender Security.exe	schtasks.exe
PID 604 wrote to memory of 908	604	Windows Defender Security.exe	powershell.exe
PID 604 wrote to memory of 908	604	Windows Defender Security.exe	powershell.exe
PID 604 wrote to memory of 908	604	Windows Defender Security.exe	powershell.exe
PID 604 wrote to memory of 908	604	Windows Defender Security.exe	powershell.exe
PID 604 wrote to memory of 1596	604	Windows Defender Security.exe	cmd.exe
PID 604 wrote to memory of 1596	604	Windows Defender Security.exe	cmd.exe
PID 604 wrote to memory of 1596	604	Windows Defender Security.exe	cmd.exe
PID 604 wrote to memory of 1596	604	Windows Defender Security.exe	cmd.exe
PID 1596 wrote to memory of 1572	1596	cmd.exe	cmd.exe
PID 1596 wrote to memory of 1572	1596	cmd.exe	cmd.exe
PID 1596 wrote to memory of 1572	1596	cmd.exe	cmd.exe
PID 1596 wrote to memory of 1572	1596	cmd.exe	cmd.exe
PID 604 wrote to memory of 944	604	Windows Defender Security.exe	cmd.exe
PID 604 wrote to memory of 944	604	Windows Defender Security.exe	cmd.exe
PID 604 wrote to memory of 944	604	Windows Defender Security.exe	cmd.exe
PID 604 wrote to memory of 944	604	Windows Defender Security.exe	cmd.exe
PID 944 wrote to memory of 668	944	cmd.exe	chcp.com
PID 944 wrote to memory of 668	944	cmd.exe	chcp.com
PID 944 wrote to memory of 668	944	cmd.exe	chcp.com
PID 944 wrote to memory of 668	944	cmd.exe	chcp.com

C:\Users\Admin\AppData\Local\Temp\e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe
"C:\Users\Admin\AppData\Local\Temp\e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2040

C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe
"C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe"
2⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
- Loads dropped DLL
- Windows security modification
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:604

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1756

C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1396

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe" /rl HIGHEST /f
4⤵
- Creates scheduled task(s)
PID:1688

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:908

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1596

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
4⤵
- Deletes itself
PID:1572

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\NpXXHwrWMKQ4.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:944

C:\Windows\SysWOW64\chcp.com
chcp 65001
4⤵
PID:668

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

3

T1112

Disabling Security Tools

2

T1089

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\NpXXHwrWMKQ4.bat
Filesize
219B

MD5
e9bcfae5edf4bd23c9bbae44a20b4c4b

SHA1
dfcf99cce749fb770a2d583f938f09677cb0c256

SHA256
97fdd89d887f607eba888a2034969f2b9ad10f4fe66c3bd52b9419638f33b5d8

SHA512
44c53589173263e0a87905869cad76bd87934676344ee17b10543c322abc9ca3c6469abeba109a2c7465989e75e5f332522911c0e85c473a8333e0dcb4cb163b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe
Filesize
535KB

MD5
6f3b107a20b18244efb6473bae2544b1

SHA1
dc02ec107547c515bffeadcd87e6308c3bdfd390

SHA256
2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

SHA512
318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe
Filesize
535KB

MD5
6f3b107a20b18244efb6473bae2544b1

SHA1
dc02ec107547c515bffeadcd87e6308c3bdfd390

SHA256
2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

SHA512
318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe
Filesize
535KB

MD5
6f3b107a20b18244efb6473bae2544b1

SHA1
dc02ec107547c515bffeadcd87e6308c3bdfd390

SHA256
2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

SHA512
318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe
Filesize
535KB

MD5
6f3b107a20b18244efb6473bae2544b1

SHA1
dc02ec107547c515bffeadcd87e6308c3bdfd390

SHA256
2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

SHA512
318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe
Filesize
535KB

MD5
6f3b107a20b18244efb6473bae2544b1

SHA1
dc02ec107547c515bffeadcd87e6308c3bdfd390

SHA256
2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

SHA512
318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

Download Submit
\Users\Admin\AppData\Roaming\Windows Defender Security.exe
Filesize
535KB

MD5
6f3b107a20b18244efb6473bae2544b1

SHA1
dc02ec107547c515bffeadcd87e6308c3bdfd390

SHA256
2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

SHA512
318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

Download Submit
memory/604-58-0x0000000000000000-mapping.dmp

Download
memory/604-62-0x0000000000A90000-0x0000000000B1C000-memory.dmp

Filesize
560KB

Download
memory/668-80-0x0000000000000000-mapping.dmp

Download
memory/908-75-0x000000006EBB0000-0x000000006F15B000-memory.dmp

Filesize
5.7MB

Download
memory/908-72-0x0000000000000000-mapping.dmp

Download
memory/908-74-0x000000006EBB0000-0x000000006F15B000-memory.dmp

Filesize
5.7MB

Download
memory/944-78-0x0000000000000000-mapping.dmp

Download
memory/1396-69-0x00000000003E0000-0x000000000046C000-memory.dmp

Filesize
560KB

Download
memory/1396-66-0x0000000000000000-mapping.dmp

Download
memory/1572-77-0x0000000000000000-mapping.dmp

Download
memory/1596-76-0x0000000000000000-mapping.dmp

Download
memory/1688-71-0x0000000000000000-mapping.dmp

Download
memory/1756-64-0x0000000000000000-mapping.dmp

Download
memory/2040-61-0x0000000074610000-0x0000000074BBB000-memory.dmp

Filesize
5.7MB

Download
memory/2040-54-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

Filesize
8KB

Download
memory/2040-56-0x0000000074610000-0x0000000074BBB000-memory.dmp

Filesize
5.7MB

Download
memory/2040-55-0x0000000074610000-0x0000000074BBB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads