quasar | fd5b712e067c1089aed9df7588844adef501a2c9742107a564a408965fb87c12

Analysis

max time kernel
33s
max time network
37s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-11-2024 15:14

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General

Target

Prestige-Injector(3).exe
Size

3.1MB
MD5

d1675434eee067b0a023a3c31cf7ba75
SHA1

baf38fe44bfea1a3f4ef5c387b71d2e08e7edc29
SHA256

fd5b712e067c1089aed9df7588844adef501a2c9742107a564a408965fb87c12
SHA512

2316bc1b93a8b816963c5199f2fecaabaaef355bd8047af3c3b432250ae92e3010db45887a57176d1a639849f70c9c16fdec5b28c3f9ab9a166456fb003657ec
SSDEEP

49152:rvyI22SsaNYfdPBldt698dBcjH7CD2a95fQ7k/PLoGdNTHHB72eh2NT:rvf22SsaNYfdPBldt6+dBcjHe6aD

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.83:4782

Mutex

20eb3b08-32c9-45df-9d5a-fb58af454c08

Attributes

encryption_key
22C1A62E3E9EE906C0C8F9D30DA34D63B8A197BA
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

Processes:

resource	yara_rule
behavioral2/memory/384-1-0x0000000000290000-0x00000000005B4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

3560 Client.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

Processes:

schtasks.exeschtasks.exe

pid process

3404 schtasks.exe
2696 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Prestige-Injector(3).exeClient.exe

description pid process

Token: SeDebugPrivilege 384 Prestige-Injector(3).exe
Token: SeDebugPrivilege 3560 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

3560 Client.exe

pid	process
3560	Client.exe

pid	process
3404	schtasks.exe
2696	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	384	Prestige-Injector(3).exe
Token: SeDebugPrivilege	3560	Client.exe

pid	process
3560	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Prestige-Injector(3).exeClient.exe

description	pid	process	target process
PID 384 wrote to memory of 3404	384	Prestige-Injector(3).exe	schtasks.exe
PID 384 wrote to memory of 3404	384	Prestige-Injector(3).exe	schtasks.exe
PID 384 wrote to memory of 3560	384	Prestige-Injector(3).exe	Client.exe
PID 384 wrote to memory of 3560	384	Prestige-Injector(3).exe	Client.exe
PID 3560 wrote to memory of 2696	3560	Client.exe	schtasks.exe
PID 3560 wrote to memory of 2696	3560	Client.exe	schtasks.exe

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\Prestige-Injector(3).exe
"C:\Users\Admin\AppData\Local\Temp\Prestige-Injector(3).exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- 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
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3404
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3560
- - 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:2696

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\SubDir\Client.exe

Filesize
3.1MB

MD5
d1675434eee067b0a023a3c31cf7ba75

SHA1
baf38fe44bfea1a3f4ef5c387b71d2e08e7edc29

SHA256
fd5b712e067c1089aed9df7588844adef501a2c9742107a564a408965fb87c12

SHA512
2316bc1b93a8b816963c5199f2fecaabaaef355bd8047af3c3b432250ae92e3010db45887a57176d1a639849f70c9c16fdec5b28c3f9ab9a166456fb003657ec

Download Submit
memory/384-0-0x00007FF857523000-0x00007FF857525000-memory.dmp

Filesize
8KB

Download
memory/384-1-0x0000000000290000-0x00000000005B4000-memory.dmp

Filesize
3.1MB

Download
memory/384-2-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/384-9-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/3560-10-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/3560-11-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/3560-12-0x000000001B020000-0x000000001B070000-memory.dmp

Filesize
320KB

Download
memory/3560-13-0x000000001D0D0000-0x000000001D182000-memory.dmp

Filesize
712KB

Download
memory/3560-14-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download