quasar | f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31/10/2024, 06:54

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General

Target

Client-built3.exe
Size

3.1MB
MD5

0ba12b4cf0e785325ef57b8addc70899
SHA1

6ebc9ef072f738e0d89a286f08e359ceacff0095
SHA256

f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
SHA512

5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889
SSDEEP

49152:WvcG42pda6D+/PjlLOlg6yQipVnVmcmzgHoGdMTHHB72eh2NT:Wvn42pda6D+/PjlLOlZyQipVnVm2

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.127.0.200:4782

Mutex

fffe048b-d25a-4851-bd46-4583f63bcae9

Attributes

encryption_key
433895AE7B4C5D8EF94D36D167293A1C1914DBFB
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/632-1-0x00000000006E0000-0x0000000000A04000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cba-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
384	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
1240	schtasks.exe
1764	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	632	Client-built3.exe
Token: SeDebugPrivilege	384	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
384	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
384	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 632 wrote to memory of 1240	632	Client-built3.exe	87
PID 632 wrote to memory of 1240	632	Client-built3.exe	87
PID 632 wrote to memory of 384	632	Client-built3.exe	89
PID 632 wrote to memory of 384	632	Client-built3.exe	89
PID 384 wrote to memory of 1764	384	Client.exe	90
PID 384 wrote to memory of 1764	384	Client.exe	90

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-built3.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built3.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:632
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1240
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:384
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1764

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
0ba12b4cf0e785325ef57b8addc70899

SHA1
6ebc9ef072f738e0d89a286f08e359ceacff0095

SHA256
f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be

SHA512
5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889

Download Submit
memory/384-9-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

Filesize
10.8MB

Download
memory/384-10-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

Filesize
10.8MB

Download
memory/384-11-0x000000001C3E0000-0x000000001C430000-memory.dmp

Filesize
320KB

Download
memory/384-12-0x000000001C4F0000-0x000000001C5A2000-memory.dmp

Filesize
712KB

Download
memory/384-13-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

Filesize
10.8MB

Download
memory/632-0-0x00007FF95A713000-0x00007FF95A715000-memory.dmp

Filesize
8KB

Download
memory/632-1-0x00000000006E0000-0x0000000000A04000-memory.dmp

Filesize
3.1MB

Download
memory/632-2-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

Filesize
10.8MB

Download
memory/632-8-0x00007FF95A710000-0x00007FF95B1D1000-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