quasar | f0992e9e2ea5d5796c8c5c622f7da893d8151d14c46de8b1847a62d7afd08c6d

Analysis

max time kernel
132s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 05:05

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

84f03f8b89bb599361ebf000c3fd13ce
SHA1

5507081e72e26ec9bc2d25dec2a14714f7b03318
SHA256

f0992e9e2ea5d5796c8c5c622f7da893d8151d14c46de8b1847a62d7afd08c6d
SHA512

09e5bc0b31a2980a3f1e51dc5964c67147aa16bc7124a5f06e237f79b5436810868f7326afbb35ab25ee1559c531ca15e10f8262aa1a061ac45737a42599f464
SSDEEP

49152:b+KL12toaDsbQPUl+DvccTzVPWj1GTiQjq3Q8Z4IoGtpTHHB72eh2NTd:b+Y12toaDsbQPUl+DvZzVPWjQS7Zl

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Slave

85.209.133.13:111

Mutex

ec2a0662-37ce-47bc-80e5-416bb4627d9b

Attributes

encryption_key
D55A711D57A556B5F8341D90111BDC78FB07B322
install_name
System.exe
log_directory
Logs
reconnect_delay
3000
startup_key
system
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/3292-1-0x0000000000B30000-0x0000000000E52000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023ccb-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
972	System.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
880	schtasks.exe
5016	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3292	Client-built.exe
Token: SeDebugPrivilege	972	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
972	System.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3292 wrote to memory of 880	3292	Client-built.exe	82
PID 3292 wrote to memory of 880	3292	Client-built.exe	82
PID 3292 wrote to memory of 972	3292	Client-built.exe	84
PID 3292 wrote to memory of 972	3292	Client-built.exe	84
PID 972 wrote to memory of 5016	972	System.exe	85
PID 972 wrote to memory of 5016	972	System.exe	85

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3292
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:880
- C:\Users\Admin\AppData\Roaming\SubDir\System.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\System.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:972
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5016

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\System.exe

Filesize
3.1MB

MD5
84f03f8b89bb599361ebf000c3fd13ce

SHA1
5507081e72e26ec9bc2d25dec2a14714f7b03318

SHA256
f0992e9e2ea5d5796c8c5c622f7da893d8151d14c46de8b1847a62d7afd08c6d

SHA512
09e5bc0b31a2980a3f1e51dc5964c67147aa16bc7124a5f06e237f79b5436810868f7326afbb35ab25ee1559c531ca15e10f8262aa1a061ac45737a42599f464

Download Submit
memory/972-9-0x00007FFD67D60000-0x00007FFD68821000-memory.dmp

Filesize
10.8MB

Download
memory/972-10-0x00007FFD67D60000-0x00007FFD68821000-memory.dmp

Filesize
10.8MB

Download
memory/972-11-0x000000001AF00000-0x000000001AF50000-memory.dmp

Filesize
320KB

Download
memory/972-12-0x000000001BC00000-0x000000001BCB2000-memory.dmp

Filesize
712KB

Download
memory/972-13-0x00007FFD67D60000-0x00007FFD68821000-memory.dmp

Filesize
10.8MB

Download
memory/3292-0-0x00007FFD67D63000-0x00007FFD67D65000-memory.dmp

Filesize
8KB

Download
memory/3292-1-0x0000000000B30000-0x0000000000E52000-memory.dmp

Filesize
3.1MB

Download
memory/3292-2-0x00007FFD67D60000-0x00007FFD68821000-memory.dmp

Filesize
10.8MB

Download
memory/3292-8-0x00007FFD67D60000-0x00007FFD68821000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads