quasar | 6c67a1bf1d558b31a790e4bdcef062c9b49f00a1b3d7361dfc8308d55b87bc5d

Analysis

max time kernel
32s
max time network
38s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
01/12/2024, 09:20

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General

Target

Panel Ejecutador MTA 3.14.exe
Size

3.3MB
MD5

5791d405ca0a97a89eeaeb4f2be628be
SHA1

a012d40aaaa01db12a83b0e4408d012fd383dd0b
SHA256

6c67a1bf1d558b31a790e4bdcef062c9b49f00a1b3d7361dfc8308d55b87bc5d
SHA512

3971447d6a5f1ffe51bb1acc0d2525aa5bca521358c67828e6bd983d68e8c22dfa83ab49109575bc113e13de861682af563a3ed21e5ef48cce1bfcdb8f1f2afd
SSDEEP

49152:ovSI22SsaNYfdPBldt698dBcjH3xcEf8Kk/Ja1oGd58THHB72eh2NT:ov/22SsaNYfdPBldt6+dBcjH3xa8

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/1212-1-0x00000000006D0000-0x0000000000A26000-memory.dmp	family_quasar
behavioral1/files/0x0029000000045024-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4648	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
3300	schtasks.exe
4312	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1212	Panel Ejecutador MTA 3.14.exe
Token: SeDebugPrivilege	4648	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4648	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1212 wrote to memory of 3300	1212	Panel Ejecutador MTA 3.14.exe	82
PID 1212 wrote to memory of 3300	1212	Panel Ejecutador MTA 3.14.exe	82
PID 1212 wrote to memory of 4648	1212	Panel Ejecutador MTA 3.14.exe	84
PID 1212 wrote to memory of 4648	1212	Panel Ejecutador MTA 3.14.exe	84
PID 4648 wrote to memory of 4312	4648	WindowsUpdate.exe	85
PID 4648 wrote to memory of 4312	4648	WindowsUpdate.exe	85

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\Panel Ejecutador MTA 3.14.exe
"C:\Users\Admin\AppData\Local\Temp\Panel Ejecutador MTA 3.14.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1212
- 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:3300
- 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:4648
- - 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
5791d405ca0a97a89eeaeb4f2be628be

SHA1
a012d40aaaa01db12a83b0e4408d012fd383dd0b

SHA256
6c67a1bf1d558b31a790e4bdcef062c9b49f00a1b3d7361dfc8308d55b87bc5d

SHA512
3971447d6a5f1ffe51bb1acc0d2525aa5bca521358c67828e6bd983d68e8c22dfa83ab49109575bc113e13de861682af563a3ed21e5ef48cce1bfcdb8f1f2afd

Download Submit
memory/1212-0-0x00007FFFB4863000-0x00007FFFB4865000-memory.dmp

Filesize
8KB

Download
memory/1212-1-0x00000000006D0000-0x0000000000A26000-memory.dmp

Filesize
3.3MB

Download
memory/1212-2-0x00007FFFB4860000-0x00007FFFB5322000-memory.dmp

Filesize
10.8MB

Download
memory/1212-5-0x00007FFFB4860000-0x00007FFFB5322000-memory.dmp

Filesize
10.8MB

Download
memory/4648-6-0x00007FFFB4860000-0x00007FFFB5322000-memory.dmp

Filesize
10.8MB

Download
memory/4648-7-0x00007FFFB4860000-0x00007FFFB5322000-memory.dmp

Filesize
10.8MB

Download
memory/4648-8-0x00000000025E0000-0x0000000002630000-memory.dmp

Filesize
320KB

Download
memory/4648-9-0x000000001B200000-0x000000001B2B2000-memory.dmp

Filesize
712KB

Download
memory/4648-12-0x00000000027B0000-0x00000000027C2000-memory.dmp

Filesize
72KB

Download
memory/4648-13-0x000000001CD10000-0x000000001CD4C000-memory.dmp

Filesize
240KB

Download
memory/4648-14-0x00007FFFB4860000-0x00007FFFB5322000-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