quasar | 5cc228520e77d8d98a9737e6ed9e560e7766bee0d3986593e6d78b3f62254ebf

Analysis

max time kernel
132s
max time network
141s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 3 IoCs

resource	yara_rule
behavioral1/memory/1712-1-0x0000000000060000-0x0000000000384000-memory.dmp	family_quasar
behavioral1/files/0x0007000000019273-6.dat	family_quasar
behavioral1/memory/2924-9-0x0000000000EE0000-0x0000000001204000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2924	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
1796	schtasks.exe
2888	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1712	EKX36_Client-built.exe
Token: SeDebugPrivilege	2924	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2924	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 1796	1712	EKX36_Client-built.exe	30
PID 1712 wrote to memory of 1796	1712	EKX36_Client-built.exe	30
PID 1712 wrote to memory of 1796	1712	EKX36_Client-built.exe	30
PID 1712 wrote to memory of 2924	1712	EKX36_Client-built.exe	32
PID 1712 wrote to memory of 2924	1712	EKX36_Client-built.exe	32
PID 1712 wrote to memory of 2924	1712	EKX36_Client-built.exe	32
PID 2924 wrote to memory of 2888	2924	Client.exe	33
PID 2924 wrote to memory of 2888	2924	Client.exe	33
PID 2924 wrote to memory of 2888	2924	Client.exe	33

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:1712
- 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:1796
- 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:2924
- - 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:2888

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/1712-0-0x000007FEF5F93000-0x000007FEF5F94000-memory.dmp

Filesize
4KB

Download
memory/1712-1-0x0000000000060000-0x0000000000384000-memory.dmp

Filesize
3.1MB

Download
memory/1712-2-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download
memory/1712-8-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download
memory/2924-10-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download
memory/2924-9-0x0000000000EE0000-0x0000000001204000-memory.dmp

Filesize
3.1MB

Download
memory/2924-11-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download
memory/2924-12-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads