quasar | 68a11c9b5380f4651ca2c7246a43d6fa905711357c773605aefb7f7ee6e6edc8

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24-04-2024 16:48

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General

Target

Client-built.exe
Size

3.1MB
MD5

1a042eb9d21238cd93f8c04f4713d9ec
SHA1

bee49a94d392843f6cec2b0f81b56c0c652c3579
SHA256

68a11c9b5380f4651ca2c7246a43d6fa905711357c773605aefb7f7ee6e6edc8
SHA512

7dda1d567a1624d0a66b2fa4b5c31a3f350fce2e590683f52a4a8c2a38e871bb20cbe47fca6c1c76667be25dd7da5375503c8d5a0863417f0c419e82d3b87b79
SSDEEP

49152:OvEt62XlaSFNWPjljiFa2RoUYIgcFrqMfnZoGdxHTHHB72eh2NT:OvY62XlaSFNWPjljiFXRoUYIgcFr7B

Score

10^/10

quasar cheat spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

cheat

192.168.178.23:4782

Mutex

272551ab-8052-4b4e-a889-aadb9092e72c

Attributes

encryption_key
2257EEB177515C16042E47AEB0207ADB4DD194BF
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java Updater
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/228-0-0x0000000000880000-0x0000000000BA4000-memory.dmp	family_quasar
C:\Windows\System32\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

1672 Client.exe

pid	process
1672	Client.exe

Drops file in System32 directory 2 IoCs

Processes:

Client-built.exe

description	ioc	process
File created	C:\Windows\system32\SubDir\Client.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client-built.exe

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

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/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

4732 schtasks.exe
1988 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description pid process

Token: SeDebugPrivilege 228 Client-built.exe
Token: SeDebugPrivilege 1672 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

1672 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

1672 Client.exe

pid	process
4732	schtasks.exe
1988	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	228	Client-built.exe
Token: SeDebugPrivilege	1672	Client.exe

pid	process
1672	Client.exe

pid	process
1672	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Client-built.exeClient.exe

description	pid	process	target process
PID 228 wrote to memory of 4732	228	Client-built.exe	schtasks.exe
PID 228 wrote to memory of 4732	228	Client-built.exe	schtasks.exe
PID 228 wrote to memory of 1672	228	Client-built.exe	Client.exe
PID 228 wrote to memory of 1672	228	Client-built.exe	Client.exe
PID 1672 wrote to memory of 1988	1672	Client.exe	schtasks.exe
PID 1672 wrote to memory of 1988	1672	Client.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:228

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4732

C:\Windows\system32\SubDir\Client.exe
"C:\Windows\system32\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1672

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1988

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\System32\SubDir\Client.exe
Filesize
3.1MB

MD5
1a042eb9d21238cd93f8c04f4713d9ec

SHA1
bee49a94d392843f6cec2b0f81b56c0c652c3579

SHA256
68a11c9b5380f4651ca2c7246a43d6fa905711357c773605aefb7f7ee6e6edc8

SHA512
7dda1d567a1624d0a66b2fa4b5c31a3f350fce2e590683f52a4a8c2a38e871bb20cbe47fca6c1c76667be25dd7da5375503c8d5a0863417f0c419e82d3b87b79

Download Submit
memory/228-0-0x0000000000880000-0x0000000000BA4000-memory.dmp

Filesize
3.1MB

Download
memory/228-1-0x00007FFE2D560000-0x00007FFE2E021000-memory.dmp

Filesize
10.8MB

Download
memory/228-2-0x0000000002C30000-0x0000000002C40000-memory.dmp

Filesize
64KB

Download
memory/228-9-0x00007FFE2D560000-0x00007FFE2E021000-memory.dmp

Filesize
10.8MB

Download
memory/1672-8-0x00007FFE2D560000-0x00007FFE2E021000-memory.dmp

Filesize
10.8MB

Download
memory/1672-10-0x000000001BB10000-0x000000001BB20000-memory.dmp

Filesize
64KB

Download
memory/1672-11-0x000000001C6E0000-0x000000001C730000-memory.dmp

Filesize
320KB

Download
memory/1672-12-0x000000001C7F0000-0x000000001C8A2000-memory.dmp

Filesize
712KB

Download
memory/1672-13-0x00007FFE2D560000-0x00007FFE2E021000-memory.dmp

Filesize
10.8MB

Download