quasar | 5cc228520e77d8d98a9737e6ed9e560e7766bee0d3986593e6d78b3f62254ebf

Analysis

max time kernel
133s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-12-2024 02:00

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General

Target

EKX36_Client-built.exe
Size

3.1MB
MD5

7979af405ec3fc618b94083c15a703f2
SHA1

a1cec10272213425b8b5a2310de229f5962b9674
SHA256

5cc228520e77d8d98a9737e6ed9e560e7766bee0d3986593e6d78b3f62254ebf
SHA512

8c66339bc802cba4dbc4caa8a4a310470b2e205a3edd7f8f2dfe10514782b8c3506d5d71618b7684a9e789d316c5da9aaf775fdbb8c1d8433a35f1aff50162ee
SSDEEP

49152:PvCI22SsaNYfdPBldt698dBcjHwx6EMkYk/JK0oGd8ITHHB72eh2NT:PvP22SsaNYfdPBldt6+dBcjHwxfBM

Score

10^/10

quasar exe spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

exe

192.168.4.70:4782

Mutex

20b94a11-6f09-4a42-b723-e2b3fc07ea20

Attributes

encryption_key
85087DC59010C3D9E4749A15AB7F44397E834804
install_name
Client.exe
log_directory
Logs
reconnect_delay
1
startup_key
Quasar Client Startup
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/1588-1-0x0000000000520000-0x0000000000844000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c9d-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3192	Client.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
1536	schtasks.exe
4288	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1588	EKX36_Client-built.exe
Token: SeDebugPrivilege	3192	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3192	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1588 wrote to memory of 4288	1588	EKX36_Client-built.exe	83
PID 1588 wrote to memory of 4288	1588	EKX36_Client-built.exe	83
PID 1588 wrote to memory of 3192	1588	EKX36_Client-built.exe	85
PID 1588 wrote to memory of 3192	1588	EKX36_Client-built.exe	85
PID 3192 wrote to memory of 1536	3192	Client.exe	86
PID 3192 wrote to memory of 1536	3192	Client.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\EKX36_Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\EKX36_Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1588
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4288
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3192
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1536

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\Client.exe

Filesize
3.1MB

MD5
7979af405ec3fc618b94083c15a703f2

SHA1
a1cec10272213425b8b5a2310de229f5962b9674

SHA256
5cc228520e77d8d98a9737e6ed9e560e7766bee0d3986593e6d78b3f62254ebf

SHA512
8c66339bc802cba4dbc4caa8a4a310470b2e205a3edd7f8f2dfe10514782b8c3506d5d71618b7684a9e789d316c5da9aaf775fdbb8c1d8433a35f1aff50162ee

Download Submit
memory/1588-0-0x00007FFBB5143000-0x00007FFBB5145000-memory.dmp

Filesize
8KB

Download
memory/1588-1-0x0000000000520000-0x0000000000844000-memory.dmp

Filesize
3.1MB

Download
memory/1588-2-0x00007FFBB5140000-0x00007FFBB5C01000-memory.dmp

Filesize
10.8MB

Download
memory/1588-9-0x00007FFBB5140000-0x00007FFBB5C01000-memory.dmp

Filesize
10.8MB

Download
memory/3192-10-0x00007FFBB5140000-0x00007FFBB5C01000-memory.dmp

Filesize
10.8MB

Download
memory/3192-11-0x00007FFBB5140000-0x00007FFBB5C01000-memory.dmp

Filesize
10.8MB

Download
memory/3192-12-0x000000001B890000-0x000000001B8E0000-memory.dmp

Filesize
320KB

Download
memory/3192-13-0x000000001B9A0000-0x000000001BA52000-memory.dmp

Filesize
712KB

Download
memory/3192-14-0x00007FFBB5140000-0x00007FFBB5C01000-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