quasar | aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

Analysis

max time kernel
1798s
max time network
1803s
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 21:53

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General

Target

PORQUEPUTASYANOSIRVE.exe
Size

3.1MB
MD5

73565f33ed4d8741291cbb30409f1727
SHA1

4d3a54b28f3ea80f884a25905e27165bdc353109
SHA256

aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de
SHA512

d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583
SSDEEP

49152:uvyI22SsaNYfdPBldt698dBcjHdtRJ6CbR3LoGd7THHB72eh2NT:uvf22SsaNYfdPBldt6+dBcjHdtRJ68

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/1532-1-0x0000000000F80000-0x00000000012A4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

4336 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

5952 schtasks.exe
5480 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PORQUEPUTASYANOSIRVE.exeClient.exe

description pid process

Token: SeDebugPrivilege 1532 PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege 4336 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

4336 Client.exe

pid	process
4336	Client.exe

pid	process
5952	schtasks.exe
5480	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1532	PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege	4336	Client.exe

pid	process
4336	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

PORQUEPUTASYANOSIRVE.exeClient.exe

description	pid	process	target process
PID 1532 wrote to memory of 5952	1532	PORQUEPUTASYANOSIRVE.exe	schtasks.exe
PID 1532 wrote to memory of 5952	1532	PORQUEPUTASYANOSIRVE.exe	schtasks.exe
PID 1532 wrote to memory of 4336	1532	PORQUEPUTASYANOSIRVE.exe	Client.exe
PID 1532 wrote to memory of 4336	1532	PORQUEPUTASYANOSIRVE.exe	Client.exe
PID 4336 wrote to memory of 5480	4336	Client.exe	schtasks.exe
PID 4336 wrote to memory of 5480	4336	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\PORQUEPUTASYANOSIRVE.exe
"C:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1532
- 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:5952
- 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:4336
- - 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:5480

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\Client.exe

Filesize
3.1MB

MD5
73565f33ed4d8741291cbb30409f1727

SHA1
4d3a54b28f3ea80f884a25905e27165bdc353109

SHA256
aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

SHA512
d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

Download Submit
memory/1532-0-0x00007FF9B5113000-0x00007FF9B5115000-memory.dmp

Filesize
8KB

Download
memory/1532-1-0x0000000000F80000-0x00000000012A4000-memory.dmp

Filesize
3.1MB

Download
memory/1532-2-0x00007FF9B5110000-0x00007FF9B5BD2000-memory.dmp

Filesize
10.8MB

Download
memory/1532-9-0x00007FF9B5110000-0x00007FF9B5BD2000-memory.dmp

Filesize
10.8MB

Download
memory/4336-5-0x00007FF9B5110000-0x00007FF9B5BD2000-memory.dmp

Filesize
10.8MB

Download
memory/4336-6-0x00007FF9B5110000-0x00007FF9B5BD2000-memory.dmp

Filesize
10.8MB

Download
memory/4336-7-0x000000001BFE0000-0x000000001C030000-memory.dmp

Filesize
320KB

Download
memory/4336-8-0x000000001C0F0000-0x000000001C1A2000-memory.dmp

Filesize
712KB

Download
memory/4336-10-0x00007FF9B5110000-0x00007FF9B5BD2000-memory.dmp

Filesize
10.8MB

Download