quasar | 3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b

Analysis

max time kernel
150s
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
14-01-2025 20:52

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General

Target

3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe
Size

3.1MB
MD5

e69d5c216f6cf59c3b71b0bf3444803e
SHA1

e18de0fa930ed0ad786bd3e22c699762d93d3e95
SHA256

3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b
SHA512

92ee6e7c5145b4281aaad5bdbe8f7a90c71ac247918112fbdb7f92256e9c562cdeeb15bb4716ee0dec168db96c1d7631023181ab7e932196effc653b8cb00527
SSDEEP

49152:nvkI22SsaNYfdPBldt698dBcjHfqDybRcboGdj/mTHHB72eh2NT:nvJ22SsaNYfdPBldt6+dBcjHfqDV

Score

10^/10

quasar 客户 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

客户

121.36.102.48:1111

Mutex

043c1c13-ad0b-4e54-a900-6308db7e18c0

Attributes

encryption_key
CBC848F0E8EC6B1B06081D6FFA1D98A8EAB2442E
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
Microsofl

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/1164-1-0x0000000000570000-0x0000000000894000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023caf-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3120	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
1336	schtasks.exe
3052	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1164	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe
Token: SeDebugPrivilege	3120	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3120	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1164 wrote to memory of 1336	1164	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	83
PID 1164 wrote to memory of 1336	1164	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	83
PID 1164 wrote to memory of 3120	1164	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	85
PID 1164 wrote to memory of 3120	1164	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	85
PID 3120 wrote to memory of 3052	3120	Client.exe	86
PID 3120 wrote to memory of 3052	3120	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\3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe
"C:\Users\Admin\AppData\Local\Temp\3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1164
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1336
- C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe
  "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3120
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3052

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\Microsofl\Client.exe

Filesize
3.1MB

MD5
e69d5c216f6cf59c3b71b0bf3444803e

SHA1
e18de0fa930ed0ad786bd3e22c699762d93d3e95

SHA256
3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b

SHA512
92ee6e7c5145b4281aaad5bdbe8f7a90c71ac247918112fbdb7f92256e9c562cdeeb15bb4716ee0dec168db96c1d7631023181ab7e932196effc653b8cb00527

Download Submit
memory/1164-0-0x00007FFA13EF3000-0x00007FFA13EF5000-memory.dmp

Filesize
8KB

Download
memory/1164-1-0x0000000000570000-0x0000000000894000-memory.dmp

Filesize
3.1MB

Download
memory/1164-2-0x00007FFA13EF0000-0x00007FFA149B1000-memory.dmp

Filesize
10.8MB

Download
memory/1164-9-0x00007FFA13EF0000-0x00007FFA149B1000-memory.dmp

Filesize
10.8MB

Download
memory/3120-10-0x00007FFA13EF0000-0x00007FFA149B1000-memory.dmp

Filesize
10.8MB

Download
memory/3120-11-0x00007FFA13EF0000-0x00007FFA149B1000-memory.dmp

Filesize
10.8MB

Download
memory/3120-12-0x000000001BC70000-0x000000001BCC0000-memory.dmp

Filesize
320KB

Download
memory/3120-13-0x000000001C5F0000-0x000000001C6A2000-memory.dmp

Filesize
712KB

Download
memory/3120-14-0x00007FFA13EF0000-0x00007FFA149B1000-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