quasar | 5a3b284cfc49a72f3a28b91aad715c0181c13c10672433323569e92f15afa0c1

Analysis

max time kernel
30s
max time network
31s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
13-12-2024 06:53

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General

Target

IMVUDineroIlimitado.exe
Size

3.3MB
MD5

507321e95801a8d7833c15613d60fa6f
SHA1

b5805546dbdff837b9a0f6c6e619ef660bb23b97
SHA256

5a3b284cfc49a72f3a28b91aad715c0181c13c10672433323569e92f15afa0c1
SHA512

bd3edf014ed1aed2aac6331307c07997dba8a5fe631cb1209eea7a3f72deb7901cc8175b73832142c9552a510f0e9d9d2cbf65008c961c4e26e992daab4c1dba
SSDEEP

49152:lvSI22SsaNYfdPBldt698dBcjHXkG/PBxAHoGdvTHHB72eh2NTfHj:lv/22SsaNYfdPBldt6+dBcjHF/UU

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/3088-1-0x0000000000620000-0x0000000000972000-memory.dmp	family_quasar
behavioral1/files/0x0028000000046126-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5068	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
3592	schtasks.exe
3764	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3088	IMVUDineroIlimitado.exe
Token: SeDebugPrivilege	5068	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5068	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3088 wrote to memory of 3592	3088	IMVUDineroIlimitado.exe	83
PID 3088 wrote to memory of 3592	3088	IMVUDineroIlimitado.exe	83
PID 3088 wrote to memory of 5068	3088	IMVUDineroIlimitado.exe	85
PID 3088 wrote to memory of 5068	3088	IMVUDineroIlimitado.exe	85
PID 5068 wrote to memory of 3764	5068	WindowsUpdate.exe	86
PID 5068 wrote to memory of 3764	5068	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\IMVUDineroIlimitado.exe
"C:\Users\Admin\AppData\Local\Temp\IMVUDineroIlimitado.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3088
- 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:3592
- 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:5068
- - 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:3764

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\WindowsUpdate.exe

Filesize
3.3MB

MD5
507321e95801a8d7833c15613d60fa6f

SHA1
b5805546dbdff837b9a0f6c6e619ef660bb23b97

SHA256
5a3b284cfc49a72f3a28b91aad715c0181c13c10672433323569e92f15afa0c1

SHA512
bd3edf014ed1aed2aac6331307c07997dba8a5fe631cb1209eea7a3f72deb7901cc8175b73832142c9552a510f0e9d9d2cbf65008c961c4e26e992daab4c1dba

Download Submit
memory/3088-5-0x00007FFC50F70000-0x00007FFC51A32000-memory.dmp

Filesize
10.8MB

Download
memory/3088-1-0x0000000000620000-0x0000000000972000-memory.dmp

Filesize
3.3MB

Download
memory/3088-2-0x00007FFC50F70000-0x00007FFC51A32000-memory.dmp

Filesize
10.8MB

Download
memory/3088-0-0x00007FFC50F73000-0x00007FFC50F75000-memory.dmp

Filesize
8KB

Download
memory/5068-7-0x00007FFC50F70000-0x00007FFC51A32000-memory.dmp

Filesize
10.8MB

Download
memory/5068-6-0x00007FFC50F70000-0x00007FFC51A32000-memory.dmp

Filesize
10.8MB

Download
memory/5068-8-0x000000001E140000-0x000000001E190000-memory.dmp

Filesize
320KB

Download
memory/5068-9-0x000000001E250000-0x000000001E302000-memory.dmp

Filesize
712KB

Download
memory/5068-10-0x000000001E1D0000-0x000000001E1E2000-memory.dmp

Filesize
72KB

Download
memory/5068-11-0x000000001E950000-0x000000001E98C000-memory.dmp

Filesize
240KB

Download
memory/5068-12-0x00007FFC50F70000-0x00007FFC51A32000-memory.dmp

Filesize
10.8MB

Download
memory/5068-13-0x00007FFC50F70000-0x00007FFC51A32000-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