quasar | fe3d6fad8814926141da7cf0e91fc86c920b5e4a6ddf7c7d3d42c2a539421e24

Analysis

max time kernel
31s
max time network
32s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
16/12/2024, 01:11

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General

Target

Reparador MTA.exe
Size

3.3MB
MD5

7c0fac689542f00caff659cbe037186f
SHA1

a541a77e67e2c768bfa69282ff926a50ce3412a1
SHA256

fe3d6fad8814926141da7cf0e91fc86c920b5e4a6ddf7c7d3d42c2a539421e24
SHA512

e5595f74acea7171c2baa2ca4000d3d54b5b0eb6d7323a3904eab1fb98c95c92f7dba83f7059b3482279cf490d0eee52a1967ba08a3540eca2b76cc96c341df2
SSDEEP

49152:1vSI22SsaNYfdPBldt698dBcjHRCl1JLLoGdSTHHB72eh2NT:1v/22SsaNYfdPBldt6+dBcjHRCF

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/1388-1-0x0000000000730000-0x0000000000A86000-memory.dmp	family_quasar
behavioral1/files/0x00290000000461bb-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1148	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
2416	schtasks.exe
4312	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1388	Reparador MTA.exe
Token: SeDebugPrivilege	1148	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1148	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 2416	1388	Reparador MTA.exe	83
PID 1388 wrote to memory of 2416	1388	Reparador MTA.exe	83
PID 1388 wrote to memory of 1148	1388	Reparador MTA.exe	85
PID 1388 wrote to memory of 1148	1388	Reparador MTA.exe	85
PID 1148 wrote to memory of 4312	1148	WindowsUpdate.exe	86
PID 1148 wrote to memory of 4312	1148	WindowsUpdate.exe	86

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\Reparador MTA.exe
"C:\Users\Admin\AppData\Local\Temp\Reparador MTA.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1388
- 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:2416
- 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:1148
- - 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:4312

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\WindowsUpdate.exe

Filesize
3.3MB

MD5
7c0fac689542f00caff659cbe037186f

SHA1
a541a77e67e2c768bfa69282ff926a50ce3412a1

SHA256
fe3d6fad8814926141da7cf0e91fc86c920b5e4a6ddf7c7d3d42c2a539421e24

SHA512
e5595f74acea7171c2baa2ca4000d3d54b5b0eb6d7323a3904eab1fb98c95c92f7dba83f7059b3482279cf490d0eee52a1967ba08a3540eca2b76cc96c341df2

Download Submit
memory/1148-5-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp

Filesize
10.8MB

Download
memory/1148-7-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp

Filesize
10.8MB

Download
memory/1148-8-0x000000001CD50000-0x000000001CDA0000-memory.dmp

Filesize
320KB

Download
memory/1148-9-0x000000001CE60000-0x000000001CF12000-memory.dmp

Filesize
712KB

Download
memory/1148-10-0x000000001CDA0000-0x000000001CDB2000-memory.dmp

Filesize
72KB

Download
memory/1148-11-0x000000001CE00000-0x000000001CE3C000-memory.dmp

Filesize
240KB

Download
memory/1148-12-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp

Filesize
10.8MB

Download
memory/1388-0-0x00007FFAF1FF3000-0x00007FFAF1FF5000-memory.dmp

Filesize
8KB

Download
memory/1388-1-0x0000000000730000-0x0000000000A86000-memory.dmp

Filesize
3.3MB

Download
memory/1388-2-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp

Filesize
10.8MB

Download
memory/1388-6-0x00007FFAF1FF0000-0x00007FFAF2AB2000-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