quasar | 68a11c9b5380f4651ca2c7246a43d6fa905711357c773605aefb7f7ee6e6edc8

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

C2

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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2012-0-0x0000000000A20000-0x0000000000D44000-memory.dmp	family_quasar
C:\Windows\System32\SubDir\Client.exe	family_quasar
behavioral1/memory/2064-7-0x0000000000980000-0x0000000000CA4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2064 Client.exe

pid	process
2064	Client.exe

Drops file in System32 directory 2 IoCs

Processes:

Client-built.exe

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

2592 schtasks.exe
2864 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description pid process

Token: SeDebugPrivilege 2012 Client-built.exe
Token: SeDebugPrivilege 2064 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

2064 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

2064 Client.exe

pid	process
2592	schtasks.exe
2864	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2012	Client-built.exe
Token: SeDebugPrivilege	2064	Client.exe

pid	process
2064	Client.exe

pid	process
2064	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Client-built.exeClient.exe

description	pid	process	target process
PID 2012 wrote to memory of 2592	2012	Client-built.exe	schtasks.exe
PID 2012 wrote to memory of 2592	2012	Client-built.exe	schtasks.exe
PID 2012 wrote to memory of 2592	2012	Client-built.exe	schtasks.exe
PID 2012 wrote to memory of 2064	2012	Client-built.exe	Client.exe
PID 2012 wrote to memory of 2064	2012	Client-built.exe	Client.exe
PID 2012 wrote to memory of 2064	2012	Client-built.exe	Client.exe
PID 2064 wrote to memory of 2864	2064	Client.exe	schtasks.exe
PID 2064 wrote to memory of 2864	2064	Client.exe	schtasks.exe
PID 2064 wrote to memory of 2864	2064	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:2012

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:2592

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:2064

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:2864

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

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/2012-0-0x0000000000A20000-0x0000000000D44000-memory.dmp

Filesize
3.1MB

Download
memory/2012-1-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2012-2-0x000000001B0A0000-0x000000001B120000-memory.dmp

Filesize
512KB

Download
memory/2012-10-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2064-8-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2064-7-0x0000000000980000-0x0000000000CA4000-memory.dmp

Filesize
3.1MB

Download
memory/2064-9-0x000000001B430000-0x000000001B4B0000-memory.dmp

Filesize
512KB

Download
memory/2064-11-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2064-12-0x000000001B430000-0x000000001B4B0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads