quasar | 23b2736b81a4c1e470f4b03ce681656c43e109e73acccbcc6279589fb1b695a6

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 02:27

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General

Target

ControlLock.exe
Size

3.1MB
MD5

15666ecca39a4cd909eb57e66d3401c6
SHA1

3442a7c4c5a482f1b5ba12f43da299310a323ffb
SHA256

23b2736b81a4c1e470f4b03ce681656c43e109e73acccbcc6279589fb1b695a6
SHA512

49001f1f25cb8ce9a402a2b71c9ae46f795a798a9d7161dce7fc64aa470570503bd9ca3b8975c53ec76f190f5d54e360beb97b4cac35c038a400fc49ba04f213
SSDEEP

49152:Sv+lL26AaNeWgPhlmVqvMQ7XSKbr4FLoGvpFbTHHB72eh2NT:SvuL26AaNeWgPhlmVqkQ7XSKbr4d

Score

10^/10

quasar controllock spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ControlLock

73.66.246.196:4782

Mutex

39766065-e590-4bf3-8b16-5588786c4cde

Attributes

encryption_key
FF6377F726ECA29603D169F2C250624963D66B79
install_name
WindowsDefender.exe
log_directory
Logs
reconnect_delay
2000
startup_key
Windows Defender
subdirectory
Windows

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1028-1-0x0000000001230000-0x0000000001554000-memory.dmp	family_quasar
C:\Windows\System32\Windows\WindowsDefender.exe	family_quasar
behavioral1/memory/2612-9-0x0000000000EC0000-0x00000000011E4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

WindowsDefender.exe

pid process

2612 WindowsDefender.exe

pid	process
2612	WindowsDefender.exe

Drops file in System32 directory 5 IoCs

Processes:

ControlLock.exeWindowsDefender.exe

description	ioc	process
File created	C:\Windows\system32\Windows\WindowsDefender.exe	ControlLock.exe
File opened for modification	C:\Windows\system32\Windows\WindowsDefender.exe	ControlLock.exe
File opened for modification	C:\Windows\system32\Windows	ControlLock.exe
File opened for modification	C:\Windows\system32\Windows\WindowsDefender.exe	WindowsDefender.exe
File opened for modification	C:\Windows\system32\Windows	WindowsDefender.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

2212 schtasks.exe
2808 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ControlLock.exeWindowsDefender.exe

description pid process

Token: SeDebugPrivilege 1028 ControlLock.exe
Token: SeDebugPrivilege 2612 WindowsDefender.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

WindowsDefender.exe

pid process

2612 WindowsDefender.exe

pid	process
2212	schtasks.exe
2808	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1028	ControlLock.exe
Token: SeDebugPrivilege	2612	WindowsDefender.exe

pid	process
2612	WindowsDefender.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

ControlLock.exeWindowsDefender.exe

description	pid	process	target process
PID 1028 wrote to memory of 2212	1028	ControlLock.exe	schtasks.exe
PID 1028 wrote to memory of 2212	1028	ControlLock.exe	schtasks.exe
PID 1028 wrote to memory of 2212	1028	ControlLock.exe	schtasks.exe
PID 1028 wrote to memory of 2612	1028	ControlLock.exe	WindowsDefender.exe
PID 1028 wrote to memory of 2612	1028	ControlLock.exe	WindowsDefender.exe
PID 1028 wrote to memory of 2612	1028	ControlLock.exe	WindowsDefender.exe
PID 2612 wrote to memory of 2808	2612	WindowsDefender.exe	schtasks.exe
PID 2612 wrote to memory of 2808	2612	WindowsDefender.exe	schtasks.exe
PID 2612 wrote to memory of 2808	2612	WindowsDefender.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\ControlLock.exe
"C:\Users\Admin\AppData\Local\Temp\ControlLock.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1028

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Windows\system32\Windows\WindowsDefender.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:2212

C:\Windows\system32\Windows\WindowsDefender.exe
"C:\Windows\system32\Windows\WindowsDefender.exe"
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2612

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Windows\system32\Windows\WindowsDefender.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2808

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Windows\System32\Windows\WindowsDefender.exe
Filesize
3.1MB

MD5
15666ecca39a4cd909eb57e66d3401c6

SHA1
3442a7c4c5a482f1b5ba12f43da299310a323ffb

SHA256
23b2736b81a4c1e470f4b03ce681656c43e109e73acccbcc6279589fb1b695a6

SHA512
49001f1f25cb8ce9a402a2b71c9ae46f795a798a9d7161dce7fc64aa470570503bd9ca3b8975c53ec76f190f5d54e360beb97b4cac35c038a400fc49ba04f213

Download Submit
memory/1028-0-0x000007FEF6063000-0x000007FEF6064000-memory.dmp

Filesize
4KB

Download
memory/1028-1-0x0000000001230000-0x0000000001554000-memory.dmp

Filesize
3.1MB

Download
memory/1028-2-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download
memory/1028-8-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download
memory/2612-10-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download
memory/2612-9-0x0000000000EC0000-0x00000000011E4000-memory.dmp

Filesize
3.1MB

Download
memory/2612-11-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download
memory/2612-12-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download