quasar | cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56

Analysis

max time kernel
126s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-01-2025 08:10

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General

Target

cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe
Size

3.1MB
MD5

2a036b0dd26406304870e4a5a5317720
SHA1

94801f96cb2dc6f0c4b236dd01d8c1c118670add
SHA256

cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56
SHA512

bc64ff4d7658d0223ff1f1291de72d051be6790487471219a28bf3199616dc3f9fbb576d6c06b146db7b3f20700339cd0650f5cc751e123d4c1535c8f6bcbbb0
SSDEEP

49152:6vrI22SsaNYfdPBldt698dBcjH5CE1JqLoGdPGOTHHB72eh2NT:6vU22SsaNYfdPBldt6+dBcjH5Cf+

Score

10^/10

quasar quasar spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Quasar

192.168.1.56:4782

192.168.1.1:4782

Mutex

5fe19de3-1a9f-412b-a448-7cecf7917fc4

Attributes

encryption_key
2055CC40613B58490E3F6E74C60505765A925EAB
install_name
Quasar.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Settings
subdirectory
SubDir

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/2616-1-0x0000000000270000-0x0000000000594000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cc1-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3616	Quasar.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

pid	Process
3020	schtasks.exe
3212	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2616	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe
Token: SeDebugPrivilege	3616	Quasar.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3616	Quasar.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 3020	2616	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	82
PID 2616 wrote to memory of 3020	2616	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	82
PID 2616 wrote to memory of 3616	2616	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	84
PID 2616 wrote to memory of 3616	2616	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	84
PID 3616 wrote to memory of 3212	3616	Quasar.exe	85
PID 3616 wrote to memory of 3212	3616	Quasar.exe	85

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\cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe
"C:\Users\Admin\AppData\Local\Temp\cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Settings" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3020
- C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3616
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Settings" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3212

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe

Filesize
3.1MB

MD5
2a036b0dd26406304870e4a5a5317720

SHA1
94801f96cb2dc6f0c4b236dd01d8c1c118670add

SHA256
cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56

SHA512
bc64ff4d7658d0223ff1f1291de72d051be6790487471219a28bf3199616dc3f9fbb576d6c06b146db7b3f20700339cd0650f5cc751e123d4c1535c8f6bcbbb0

Download Submit
memory/2616-0-0x00007FFA5E943000-0x00007FFA5E945000-memory.dmp

Filesize
8KB

Download
memory/2616-1-0x0000000000270000-0x0000000000594000-memory.dmp

Filesize
3.1MB

Download
memory/2616-2-0x00007FFA5E940000-0x00007FFA5F401000-memory.dmp

Filesize
10.8MB

Download
memory/2616-10-0x00007FFA5E940000-0x00007FFA5F401000-memory.dmp

Filesize
10.8MB

Download
memory/3616-9-0x00007FFA5E940000-0x00007FFA5F401000-memory.dmp

Filesize
10.8MB

Download
memory/3616-11-0x00007FFA5E940000-0x00007FFA5F401000-memory.dmp

Filesize
10.8MB

Download
memory/3616-12-0x000000001D250000-0x000000001D2A0000-memory.dmp

Filesize
320KB

Download
memory/3616-13-0x000000001D360000-0x000000001D412000-memory.dmp

Filesize
712KB

Download
memory/3616-14-0x00007FFA5E940000-0x00007FFA5F401000-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