quasar | ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed

Analysis

max time kernel
149s
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
18-12-2024 07:18

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General

Target

ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.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/1644-1-0x0000000000480000-0x00000000007A4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b7b-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
60	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
1944	schtasks.exe
3484	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1644	ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.exe
Token: SeDebugPrivilege	60	Sever Startup.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
60	Sever Startup.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
60	Sever Startup.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
60	Sever Startup.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 1944	1644	ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.exe	83
PID 1644 wrote to memory of 1944	1644	ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.exe	83
PID 1644 wrote to memory of 60	1644	ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.exe	85
PID 1644 wrote to memory of 60	1644	ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.exe	85
PID 60 wrote to memory of 3484	60	Sever Startup.exe	86
PID 60 wrote to memory of 3484	60	Sever Startup.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\ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.exe
"C:\Users\Admin\AppData\Local\Temp\ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1644
- 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:1944
- 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:60
- - 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:3484

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/60-10-0x00007FF91EF00000-0x00007FF91F9C1000-memory.dmp

Filesize
10.8MB

Download
memory/60-11-0x00007FF91EF00000-0x00007FF91F9C1000-memory.dmp

Filesize
10.8MB

Download
memory/60-12-0x000000001B6C0000-0x000000001B710000-memory.dmp

Filesize
320KB

Download
memory/60-13-0x000000001BED0000-0x000000001BF82000-memory.dmp

Filesize
712KB

Download
memory/60-14-0x00007FF91EF00000-0x00007FF91F9C1000-memory.dmp

Filesize
10.8MB

Download
memory/1644-0-0x00007FF91EF03000-0x00007FF91EF05000-memory.dmp

Filesize
8KB

Download
memory/1644-1-0x0000000000480000-0x00000000007A4000-memory.dmp

Filesize
3.1MB

Download
memory/1644-2-0x00007FF91EF00000-0x00007FF91F9C1000-memory.dmp

Filesize
10.8MB

Download
memory/1644-9-0x00007FF91EF00000-0x00007FF91F9C1000-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