quasar | 3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b

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

C2

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 3 IoCs

resource	yara_rule
behavioral1/memory/604-1-0x0000000000970000-0x0000000000C94000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015fa6-6.dat	family_quasar
behavioral1/memory/2308-10-0x0000000000F10000-0x0000000001234000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2308	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
1668	schtasks.exe
856	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	604	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe
Token: SeDebugPrivilege	2308	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2308	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 604 wrote to memory of 1668	604	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	31
PID 604 wrote to memory of 1668	604	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	31
PID 604 wrote to memory of 1668	604	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	31
PID 604 wrote to memory of 2308	604	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	33
PID 604 wrote to memory of 2308	604	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	33
PID 604 wrote to memory of 2308	604	3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b.exe	33
PID 2308 wrote to memory of 856	2308	Client.exe	34
PID 2308 wrote to memory of 856	2308	Client.exe	34
PID 2308 wrote to memory of 856	2308	Client.exe	34

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:604
- 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:1668
- 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:2308
- - 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:856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

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/604-0-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

Filesize
4KB

Download
memory/604-1-0x0000000000970000-0x0000000000C94000-memory.dmp

Filesize
3.1MB

Download
memory/604-2-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/604-9-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-8-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-10-0x0000000000F10000-0x0000000001234000-memory.dmp

Filesize
3.1MB

Download
memory/2308-11-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-12-0x000007FEF55F0000-0x000007FEF5FDC000-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