quasar | 370e43173ca787e6fdb25e366832b962e7361842a8c935275ea10e996a1e65dc

Analysis

max time kernel
126s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2025, 23:35

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General

Target

Dynastyn.exe
Size

3.1MB
MD5

7278f8e052dfce0ab3b0e26342df90c7
SHA1

b8e1a85020c3bc897bee6d2dfa2b0b7a0066a877
SHA256

370e43173ca787e6fdb25e366832b962e7361842a8c935275ea10e996a1e65dc
SHA512

d8dfc255717d1756ae67720e17d21098c20ea62ddf2fd4ecc2eb45ce228c12bce655b7754879a834850b9ff831fa58b66daed54d69f869983473b20fbacd11f4
SSDEEP

49152:evBt62XlaSFNWPjljiFa2RoUYI/US21J/+oGdo7THHB72eh2NT:evr62XlaSFNWPjljiFXRoUYI/USf4

Score

10^/10

quasar dynasty spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Dynasty

192.168.1.15:6811

Mutex

1874328e-c44e-4a21-9487-360438f0be06

Attributes

encryption_key
A293A810C06D86E5BF7959B54E0B6A129843E485
install_name
System.exe
log_directory
Dynasty
reconnect_delay
3000
startup_key
System.exe
subdirectory
system64x

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/3004-1-0x0000000000910000-0x0000000000C34000-memory.dmp	family_quasar
behavioral1/files/0x00070000000242c6-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5524	System.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\system64x	Dynastyn.exe
File opened for modification	C:\Windows\system32\system64x\System.exe	System.exe
File opened for modification	C:\Windows\system32\system64x	System.exe
File created	C:\Windows\system32\system64x\System.exe	Dynastyn.exe
File opened for modification	C:\Windows\system32\system64x\System.exe	Dynastyn.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
1844	schtasks.exe
6076	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3004	Dynastyn.exe
Token: SeDebugPrivilege	5524	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5524	System.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 1844	3004	Dynastyn.exe	88
PID 3004 wrote to memory of 1844	3004	Dynastyn.exe	88
PID 3004 wrote to memory of 5524	3004	Dynastyn.exe	90
PID 3004 wrote to memory of 5524	3004	Dynastyn.exe	90
PID 5524 wrote to memory of 6076	5524	System.exe	93
PID 5524 wrote to memory of 6076	5524	System.exe	93

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\Dynastyn.exe
"C:\Users\Admin\AppData\Local\Temp\Dynastyn.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "System.exe" /sc ONLOGON /tr "C:\Windows\system32\system64x\System.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1844
- C:\Windows\system32\system64x\System.exe
  "C:\Windows\system32\system64x\System.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5524
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "System.exe" /sc ONLOGON /tr "C:\Windows\system32\system64x\System.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:6076

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:468

Network

MITRE ATT&CK Enterprise v16

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:\Windows\System32\system64x\System.exe

Filesize
3.1MB

MD5
7278f8e052dfce0ab3b0e26342df90c7

SHA1
b8e1a85020c3bc897bee6d2dfa2b0b7a0066a877

SHA256
370e43173ca787e6fdb25e366832b962e7361842a8c935275ea10e996a1e65dc

SHA512
d8dfc255717d1756ae67720e17d21098c20ea62ddf2fd4ecc2eb45ce228c12bce655b7754879a834850b9ff831fa58b66daed54d69f869983473b20fbacd11f4

Download Submit
memory/3004-0-0x00007FFC9C953000-0x00007FFC9C955000-memory.dmp

Filesize
8KB

Download
memory/3004-1-0x0000000000910000-0x0000000000C34000-memory.dmp

Filesize
3.1MB

Download
memory/3004-2-0x00007FFC9C950000-0x00007FFC9D411000-memory.dmp

Filesize
10.8MB

Download
memory/3004-9-0x00007FFC9C950000-0x00007FFC9D411000-memory.dmp

Filesize
10.8MB

Download
memory/5524-10-0x00007FFC9C950000-0x00007FFC9D411000-memory.dmp

Filesize
10.8MB

Download
memory/5524-11-0x00007FFC9C950000-0x00007FFC9D411000-memory.dmp

Filesize
10.8MB

Download
memory/5524-12-0x000000001B2E0000-0x000000001B330000-memory.dmp

Filesize
320KB

Download
memory/5524-13-0x000000001BB30000-0x000000001BBE2000-memory.dmp

Filesize
712KB

Download
memory/5524-14-0x00007FFC9C950000-0x00007FFC9D411000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads