quasar | 1bbc7b17fd0b5666d5e800834141137d104a9834708e0b2c48094b140f6307b9

Analysis

max time kernel
63s
max time network
69s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
17-11-2024 01:26

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General

Target

uff cine.exe
Size

3.1MB
MD5

a4e1729d53177b9a9f5df91789ec2656
SHA1

88123088de9992ebdcdf13169cdf95311a741e35
SHA256

1bbc7b17fd0b5666d5e800834141137d104a9834708e0b2c48094b140f6307b9
SHA512

410ee3cdc72deac82e1fb573f57a49e6bad12c1b6944d5b0b8426f93726c5987c4d3661e57352f25157624d2b854fed711823b83fd997d1e800d6f718bb0c412
SSDEEP

49152:evyI22SsaNYfdPBldt698dBcjH5Cs1JoLoGdPhhTHHB72eh2NT:evf22SsaNYfdPBldt6+dBcjH5CpJ

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

azxq0ap.localto.net:3425

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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
behavioral1/memory/3480-1-0x00000000004B0000-0x00000000007D4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

936 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

2724 schtasks.exe
4496 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

uff cine.exeClient.exe

description pid process

Token: SeDebugPrivilege 3480 uff cine.exe
Token: SeDebugPrivilege 936 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

936 Client.exe

pid	process
936	Client.exe

pid	process
2724	schtasks.exe
4496	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3480	uff cine.exe
Token: SeDebugPrivilege	936	Client.exe

pid	process
936	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

uff cine.exeClient.exe

description	pid	process	target process
PID 3480 wrote to memory of 2724	3480	uff cine.exe	schtasks.exe
PID 3480 wrote to memory of 2724	3480	uff cine.exe	schtasks.exe
PID 3480 wrote to memory of 936	3480	uff cine.exe	Client.exe
PID 3480 wrote to memory of 936	3480	uff cine.exe	Client.exe
PID 936 wrote to memory of 4496	936	Client.exe	schtasks.exe
PID 936 wrote to memory of 4496	936	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\uff cine.exe
"C:\Users\Admin\AppData\Local\Temp\uff cine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3480
- 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:2724
- 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:936
- - 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:4496

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

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
a4e1729d53177b9a9f5df91789ec2656

SHA1
88123088de9992ebdcdf13169cdf95311a741e35

SHA256
1bbc7b17fd0b5666d5e800834141137d104a9834708e0b2c48094b140f6307b9

SHA512
410ee3cdc72deac82e1fb573f57a49e6bad12c1b6944d5b0b8426f93726c5987c4d3661e57352f25157624d2b854fed711823b83fd997d1e800d6f718bb0c412

Download Submit
memory/936-5-0x00007FFFA5890000-0x00007FFFA6352000-memory.dmp

Filesize
10.8MB

Download
memory/936-7-0x00007FFFA5890000-0x00007FFFA6352000-memory.dmp

Filesize
10.8MB

Download
memory/936-8-0x000000001CFA0000-0x000000001CFF0000-memory.dmp

Filesize
320KB

Download
memory/936-9-0x000000001D0B0000-0x000000001D162000-memory.dmp

Filesize
712KB

Download
memory/936-12-0x000000001D030000-0x000000001D042000-memory.dmp

Filesize
72KB

Download
memory/936-13-0x000000001DBB0000-0x000000001DBEC000-memory.dmp

Filesize
240KB

Download
memory/936-14-0x00007FFFA5890000-0x00007FFFA6352000-memory.dmp

Filesize
10.8MB

Download
memory/3480-0-0x00007FFFA5893000-0x00007FFFA5895000-memory.dmp

Filesize
8KB

Download
memory/3480-1-0x00000000004B0000-0x00000000007D4000-memory.dmp

Filesize
3.1MB

Download
memory/3480-2-0x00007FFFA5890000-0x00007FFFA6352000-memory.dmp

Filesize
10.8MB

Download
memory/3480-6-0x00007FFFA5890000-0x00007FFFA6352000-memory.dmp

Filesize
10.8MB

Download