quasar | aef4fc9260304e3a2ab4da2abe82a732b3d41881a7a50a11b4fb93f5254439ce

Analysis

max time kernel
200s
max time network
211s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-12-2024 19:15

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General

Target

Client-built.exe
Size

3.1MB
MD5

007d68229a59ff99219af5cf03cface3
SHA1

6f38fb49e049b41c83792ef5f36f169a31a2b0ca
SHA256

aef4fc9260304e3a2ab4da2abe82a732b3d41881a7a50a11b4fb93f5254439ce
SHA512

9a1eb07013fcacf437e223f2bb713cd370fa4a0d54c3f5084313a2d0e25045e85f1d10ef4f78c3153e3aa5bfef5a6ccfa57a0bdfec422a899f7187d72ad16724
SSDEEP

49152:Cvkt62XlaSFNWPjljiFa2RoUYIpQrhfmztnoGdy/THHB72eh2NT:Cv462XlaSFNWPjljiFXRoUYImrhm

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

slave

192.168.0.192:4782

Mutex

fe472357-144d-4a3a-8e1d-9ef513643cc1

Attributes

encryption_key
5E806E3CE72868F0BCCBB7C901531979B646D78D
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
quasar
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/3972-1-0x00000000009C0000-0x0000000000CE4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b98-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3792	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
1944	schtasks.exe
1148	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3972	Client-built.exe
Token: SeDebugPrivilege	3792	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3792	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3792	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3792	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 1944	3972	Client-built.exe	85
PID 3972 wrote to memory of 1944	3972	Client-built.exe	85
PID 3972 wrote to memory of 3792	3972	Client-built.exe	87
PID 3972 wrote to memory of 3792	3972	Client-built.exe	87
PID 3792 wrote to memory of 1148	3792	Client.exe	88
PID 3792 wrote to memory of 1148	3792	Client.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "quasar" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1944
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3792
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "quasar" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1148

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
007d68229a59ff99219af5cf03cface3

SHA1
6f38fb49e049b41c83792ef5f36f169a31a2b0ca

SHA256
aef4fc9260304e3a2ab4da2abe82a732b3d41881a7a50a11b4fb93f5254439ce

SHA512
9a1eb07013fcacf437e223f2bb713cd370fa4a0d54c3f5084313a2d0e25045e85f1d10ef4f78c3153e3aa5bfef5a6ccfa57a0bdfec422a899f7187d72ad16724

Download Submit
memory/3792-9-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/3792-10-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/3792-11-0x000000001C1B0000-0x000000001C200000-memory.dmp

Filesize
320KB

Download
memory/3792-12-0x000000001C2C0000-0x000000001C372000-memory.dmp

Filesize
712KB

Download
memory/3792-13-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/3792-14-0x000000001CBF0000-0x000000001D118000-memory.dmp

Filesize
5.2MB

Download
memory/3972-0-0x00007FFEEB9B3000-0x00007FFEEB9B5000-memory.dmp

Filesize
8KB

Download
memory/3972-1-0x00000000009C0000-0x0000000000CE4000-memory.dmp

Filesize
3.1MB

Download
memory/3972-2-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/3972-8-0x00007FFEEB9B0000-0x00007FFEEC471000-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