quasar | e0b8bdf7e79e5c4e2f9282b430bd4779f27609cef1996e2c633bfacb4ef16463

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
03-08-2023 16:59

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General

Target

Client-built.exe
Size

3.1MB
MD5

97ca31cf187986d32927e44a55b9492f
SHA1

a88a775bff0eb5fb33883eb1ecfbf41ed18a248e
SHA256

e0b8bdf7e79e5c4e2f9282b430bd4779f27609cef1996e2c633bfacb4ef16463
SHA512

850ca8e9ffda13dc1e1c8a8c0fe96310da974051342717de2358b7917e3939a8eadf1170d4d6d16f02afe815d41fda2061652c5a69e84e32962c2acc53f917c5
SSDEEP

49152:Evfgo2QSaNpzyPllgamb0CZof/JOkJrAMfNLoGdnTHHB72eh2NT:EvIo2QSaNpzyPllgamYCZof/JOkJrJ

Score

10^/10

quasar infected spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Infected

192.168.1.1:4782

192.168.1.66:4782

dark-crystal.at.ply.gg:4782

AmirAmir8565-21667.portmap.host:4782

AmirAmir8565-20409.portmap.host:20409

Mutex

ff410ede-beff-4970-8e12-7d251057f1fd

Attributes

encryption_key
1B172706DED462B59F2A5056AB06A8DD1EE8491B
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Realtek Audio
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1196-54-0x00000000011F0000-0x0000000001514000-memory.dmp	family_quasar

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

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

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2796 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Client-built.exe

description pid process

Token: SeDebugPrivilege 1196 Client-built.exe

pid	process
2796	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1196	Client-built.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Client-built.exe

description	pid	process	target process
PID 1196 wrote to memory of 2796	1196	Client-built.exe	schtasks.exe
PID 1196 wrote to memory of 2796	1196	Client-built.exe	schtasks.exe
PID 1196 wrote to memory of 2796	1196	Client-built.exe	schtasks.exe

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:1196

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Realtek Audio" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2796

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1196-54-0x00000000011F0000-0x0000000001514000-memory.dmp

Filesize
3.1MB

Download
memory/1196-55-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

Filesize
9.9MB

Download
memory/1196-56-0x000000001B500000-0x000000001B580000-memory.dmp

Filesize
512KB

Download
memory/1196-58-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

Filesize
9.9MB

Download
memory/1196-59-0x000000001B500000-0x000000001B580000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads