quasar | 13db2b7d1a27240835fa508fedcfce9ec31f70f9c602260ac028d40c3185b6aa

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2025 22:22

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General

Target

Client-built.exe
Size

3.1MB
MD5

4f64eac42f35da5bc722e9a490ed9634
SHA1

4367e4fc0003764d72152f2beb15c57f7d584143
SHA256

13db2b7d1a27240835fa508fedcfce9ec31f70f9c602260ac028d40c3185b6aa
SHA512

3e27569395107a0f84be223c5366ab0804ad3a096d84267549134957194d28a9fa358e1f149abd0d70617813ac1ea1d6a8d8c986808ca7c2d00cdac24292eeaf
SSDEEP

49152:Dv3I22SsaNYfdPBldt698dBcjHkW4w9HarHhoGdSGTHHB72eh2NT:Dv422SsaNYfdPBldt6+dBcjHt9+

Score

10^/10

quasar first spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

first

ZyloX-37288.portmap.host:37288

Mutex

44382739-6e8e-4a03-b838-6ed9f8f4bf36

Attributes

encryption_key
59DD70006F5E5424ACBA442199524AA9815F439E
install_name
Calculator.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RtkAudUService86
subdirectory
Calculator_UWP

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/4552-1-0x0000000000350000-0x0000000000674000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c97-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3988	Calculator.exe

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

System Information Discovery
T1082

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

pid	Process
4820	schtasks.exe
4260	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4552	Client-built.exe
Token: SeDebugPrivilege	3988	Calculator.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3988	Calculator.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3988	Calculator.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 4820	4552	Client-built.exe	83
PID 4552 wrote to memory of 4820	4552	Client-built.exe	83
PID 4552 wrote to memory of 3988	4552	Client-built.exe	85
PID 4552 wrote to memory of 3988	4552	Client-built.exe	85
PID 3988 wrote to memory of 4260	3988	Calculator.exe	86
PID 3988 wrote to memory of 4260	3988	Calculator.exe	86

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⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RtkAudUService86" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4820
- C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe
  "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3988
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RtkAudUService86" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4260

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe

Filesize
3.1MB

MD5
4f64eac42f35da5bc722e9a490ed9634

SHA1
4367e4fc0003764d72152f2beb15c57f7d584143

SHA256
13db2b7d1a27240835fa508fedcfce9ec31f70f9c602260ac028d40c3185b6aa

SHA512
3e27569395107a0f84be223c5366ab0804ad3a096d84267549134957194d28a9fa358e1f149abd0d70617813ac1ea1d6a8d8c986808ca7c2d00cdac24292eeaf

Download Submit
memory/3988-9-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/3988-10-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/3988-11-0x000000001C940000-0x000000001C990000-memory.dmp

Filesize
320KB

Download
memory/3988-12-0x000000001CA50000-0x000000001CB02000-memory.dmp

Filesize
712KB

Download
memory/3988-13-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/4552-0-0x00007FFA24463000-0x00007FFA24465000-memory.dmp

Filesize
8KB

Download
memory/4552-1-0x0000000000350000-0x0000000000674000-memory.dmp

Filesize
3.1MB

Download
memory/4552-2-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/4552-8-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads