quasar | 4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d

Analysis

max time kernel
150s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-12-2024 22:15

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General

Target

4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe
Size

3.1MB
MD5

952c395d389a3bdc237c944bf1331b60
SHA1

5fc20754fdd26e2f115dfe13b88762131fe8533f
SHA256

4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d
SHA512

8b486a2dce469638dc8e355b1581af65d109406eb1df015125b350f94cf8c2f83b6c91ba9f46decb67b6650a4d011236e212a41b1220d6aedde7070c5a8ee824
SSDEEP

49152:Vvht62XlaSFNWPjljiFa2RoUYIdqWhybRjPLoGddJfTHHB72eh2NTv:VvL62XlaSFNWPjljiFXRoUYIdqWhWTO

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.17:5555

Mutex

3b1732e2-6a81-44bb-8d99-4472451b1cf3

Attributes

encryption_key
871AD53C1EE1C8F197D53D3E1DCA45CC62B82B8D
install_name
javaconfig.exe
log_directory
Logs
reconnect_delay
3000
startup_key
JavaUpdater
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
behavioral2/memory/2940-1-0x00000000008F0000-0x0000000000C16000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b78-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5020	javaconfig.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
1868	schtasks.exe
3040	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe
Token: SeDebugPrivilege	5020	javaconfig.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5020	javaconfig.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
5020	javaconfig.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5020	javaconfig.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 3040	2940	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe	83
PID 2940 wrote to memory of 3040	2940	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe	83
PID 2940 wrote to memory of 5020	2940	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe	85
PID 2940 wrote to memory of 5020	2940	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe	85
PID 5020 wrote to memory of 1868	5020	javaconfig.exe	86
PID 5020 wrote to memory of 1868	5020	javaconfig.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\4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe
"C:\Users\Admin\AppData\Local\Temp\4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3040
- C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5020
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1868

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\javaconfig.exe

Filesize
3.1MB

MD5
952c395d389a3bdc237c944bf1331b60

SHA1
5fc20754fdd26e2f115dfe13b88762131fe8533f

SHA256
4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d

SHA512
8b486a2dce469638dc8e355b1581af65d109406eb1df015125b350f94cf8c2f83b6c91ba9f46decb67b6650a4d011236e212a41b1220d6aedde7070c5a8ee824

Download Submit
memory/2940-0-0x00007FFB290C3000-0x00007FFB290C5000-memory.dmp

Filesize
8KB

Download
memory/2940-1-0x00000000008F0000-0x0000000000C16000-memory.dmp

Filesize
3.1MB

Download
memory/2940-2-0x00007FFB290C0000-0x00007FFB29B81000-memory.dmp

Filesize
10.8MB

Download
memory/2940-9-0x00007FFB290C0000-0x00007FFB29B81000-memory.dmp

Filesize
10.8MB

Download
memory/5020-10-0x00007FFB290C0000-0x00007FFB29B81000-memory.dmp

Filesize
10.8MB

Download
memory/5020-11-0x00007FFB290C0000-0x00007FFB29B81000-memory.dmp

Filesize
10.8MB

Download
memory/5020-12-0x000000001C3C0000-0x000000001C410000-memory.dmp

Filesize
320KB

Download
memory/5020-13-0x000000001C4D0000-0x000000001C582000-memory.dmp

Filesize
712KB

Download
memory/5020-14-0x00007FFB290C0000-0x00007FFB29B81000-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