quasar | ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed

Analysis

max time kernel
144s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 06:34

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General

Target

svhost.exe
Size

3.1MB
MD5

c80f9809068b2d6af93f3f30d8e5bd6d
SHA1

c1f5e71198cfcc328acf4c2b62d7782f15ebe55c
SHA256

ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed
SHA512

10bfa7c1398822252a094890a1d6b6c27d0c80a36614fb7e2d258337e697732424a47541e2f2007d01eff91a5b4c3b39f7677d03232706b307f9fad1aa24ed9c
SSDEEP

49152:SvbI22SsaNYfdPBldt698dBcjHmZ/g8dB0KoBdW/THHB72eh2NT:Svk22SsaNYfdPBldt6+dBcjHm9g0Z

Score

10^/10

quasar windows client spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Windows Client

148.163.102.170:4782

Mutex

4c18e02c-7c39-4a5e-bbef-16fe13828101

Attributes

encryption_key
73B0A3AC50C78E243EA93BF9E60C9BC63D63CA26
install_name
Sever Startup.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Startup
subdirectory
Windows Startup

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/3880-1-0x00000000007B0000-0x0000000000AD4000-memory.dmp	family_quasar
behavioral2/files/0x000300000001e5b2-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3092	Sever Startup.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
3416	schtasks.exe
1436	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3880	svhost.exe
Token: SeDebugPrivilege	3092	Sever Startup.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3092	Sever Startup.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3092	Sever Startup.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3092	Sever Startup.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 3416	3880	svhost.exe	85
PID 3880 wrote to memory of 3416	3880	svhost.exe	85
PID 3880 wrote to memory of 3092	3880	svhost.exe	87
PID 3880 wrote to memory of 3092	3880	svhost.exe	87
PID 3092 wrote to memory of 1436	3092	Sever Startup.exe	88
PID 3092 wrote to memory of 1436	3092	Sever Startup.exe	88

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\svhost.exe
"C:\Users\Admin\AppData\Local\Temp\svhost.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3880
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3416
- C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe
  "C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3092
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1436

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\Windows Startup\Sever Startup.exe

Filesize
3.1MB

MD5
c80f9809068b2d6af93f3f30d8e5bd6d

SHA1
c1f5e71198cfcc328acf4c2b62d7782f15ebe55c

SHA256
ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed

SHA512
10bfa7c1398822252a094890a1d6b6c27d0c80a36614fb7e2d258337e697732424a47541e2f2007d01eff91a5b4c3b39f7677d03232706b307f9fad1aa24ed9c

Download Submit
memory/3092-10-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/3092-11-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/3092-12-0x000000001B200000-0x000000001B250000-memory.dmp

Filesize
320KB

Download
memory/3092-13-0x000000001BBA0000-0x000000001BC52000-memory.dmp

Filesize
712KB

Download
memory/3092-14-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/3880-0-0x00007FFAF29E3000-0x00007FFAF29E5000-memory.dmp

Filesize
8KB

Download
memory/3880-1-0x00000000007B0000-0x0000000000AD4000-memory.dmp

Filesize
3.1MB

Download
memory/3880-2-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/3880-9-0x00007FFAF29E0000-0x00007FFAF34A1000-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