quasar | 5e66f2e25b980485b49cbaaccf16eb6b39495e356eea2d4a9e51c3a81ca15f4b

Analysis

max time kernel
14s
max time network
17s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
28-12-2024 08:17

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Licencia XHXX.exe
Size

3.1MB
MD5

16656861d60be66d91ef29c455276669
SHA1

8d21d8e02398f67be2abd30d6162b9c990c9da44
SHA256

5e66f2e25b980485b49cbaaccf16eb6b39495e356eea2d4a9e51c3a81ca15f4b
SHA512

0bd5138730a6cc7fbc56271d9364ef3104c24b5442b7549b59b3ea662e918897ab79e510eb764315c0cec7e576250391ae43cc9754c6199bcef379ddb60a389a
SSDEEP

49152:6vSI22SsaNYfdPBldt698dBcjHr6+n8yhLoGdb8+THHB72eh2NT:6v/22SsaNYfdPBldt6+dBcjHr6+Lr8

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
WindowsUpdate.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsUpdate
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
behavioral1/memory/1504-1-0x0000000000080000-0x00000000003A6000-memory.dmp	family_quasar
behavioral1/files/0x0028000000046194-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3396	WindowsUpdate.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
852	schtasks.exe
4620	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1504	Licencia XHXX.exe
Token: SeDebugPrivilege	3396	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3396	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 4620	1504	Licencia XHXX.exe	85
PID 1504 wrote to memory of 4620	1504	Licencia XHXX.exe	85
PID 1504 wrote to memory of 3396	1504	Licencia XHXX.exe	87
PID 1504 wrote to memory of 3396	1504	Licencia XHXX.exe	87
PID 3396 wrote to memory of 852	3396	WindowsUpdate.exe	88
PID 3396 wrote to memory of 852	3396	WindowsUpdate.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\Licencia XHXX.exe
"C:\Users\Admin\AppData\Local\Temp\Licencia XHXX.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4620
- C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3396
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:852

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

Loading Replay Monitor...

Downloads

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

Filesize
3.1MB

MD5
16656861d60be66d91ef29c455276669

SHA1
8d21d8e02398f67be2abd30d6162b9c990c9da44

SHA256
5e66f2e25b980485b49cbaaccf16eb6b39495e356eea2d4a9e51c3a81ca15f4b

SHA512
0bd5138730a6cc7fbc56271d9364ef3104c24b5442b7549b59b3ea662e918897ab79e510eb764315c0cec7e576250391ae43cc9754c6199bcef379ddb60a389a

Download Submit
memory/1504-0-0x00007FFC7DB03000-0x00007FFC7DB05000-memory.dmp

Filesize
8KB

Download
memory/1504-1-0x0000000000080000-0x00000000003A6000-memory.dmp

Filesize
3.1MB

Download
memory/1504-2-0x00007FFC7DB00000-0x00007FFC7E5C2000-memory.dmp

Filesize
10.8MB

Download
memory/1504-5-0x00007FFC7DB00000-0x00007FFC7E5C2000-memory.dmp

Filesize
10.8MB

Download
memory/3396-7-0x00007FFC7DB00000-0x00007FFC7E5C2000-memory.dmp

Filesize
10.8MB

Download
memory/3396-6-0x00007FFC7DB00000-0x00007FFC7E5C2000-memory.dmp

Filesize
10.8MB

Download
memory/3396-8-0x000000001B830000-0x000000001B880000-memory.dmp

Filesize
320KB

Download
memory/3396-9-0x000000001C990000-0x000000001CA42000-memory.dmp

Filesize
712KB

Download
memory/3396-12-0x000000001C900000-0x000000001C912000-memory.dmp

Filesize
72KB

Download
memory/3396-13-0x000000001D490000-0x000000001D4CC000-memory.dmp

Filesize
240KB

Download
memory/3396-14-0x00007FFC7DB00000-0x00007FFC7E5C2000-memory.dmp

Filesize
10.8MB

Download
memory/3396-15-0x00007FFC7DB00000-0x00007FFC7E5C2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads