quasar | b88778620ae5d78d22ebd16c16f92f02e3102f076f485f15636ee7b9f1357b6c

Analysis

max time kernel
35s
max time network
39s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 13:15

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General

Target

jjsploits.exe
Size

1.7MB
MD5

2d225cd9a4e9a9f60997596fe0352730
SHA1

b7de45d930dd5ee2f0995e9d733a8699f67945d7
SHA256

b88778620ae5d78d22ebd16c16f92f02e3102f076f485f15636ee7b9f1357b6c
SHA512

5e0c3ee82703675563ccc998033c472502d65f8f0b087c773e331ca98a4d6ea5c61fdc442501f8e3748c07119d2907175785f0c7a1917e8267531f4f73f02bee
SSDEEP

49152:ENWHH/MpBPjSl6r2aJh82RjsoeCm9fHQIzZU9:ENOfuSrMS0srF9dS9

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.56.1:4782

Mutex

720cb9d9-4048-4d3e-932e-6f9cd3ceb802

Attributes

encryption_key
767E88DA40E4C28501E7DF4CF7F3D9BD448C27E7
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WIndowsUpdSys
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
behavioral2/files/0x0009000000023bcf-6.dat	family_quasar
behavioral2/memory/2628-15-0x0000000000A00000-0x0000000000D24000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

jjsploits.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	jjsploits.exe

Executes dropped EXE 1 IoCs

Processes:

QuasarVPn.exe

pid	Process
2628	QuasarVPn.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
3968	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

QuasarVPn.exe

description	pid	Process
Token: SeDebugPrivilege	2628	QuasarVPn.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

QuasarVPn.exe

pid	Process
2628	QuasarVPn.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

jjsploits.exeQuasarVPn.exe

description	pid	Process	procid_target
PID 2204 wrote to memory of 2628	2204	jjsploits.exe	85
PID 2204 wrote to memory of 2628	2204	jjsploits.exe	85
PID 2628 wrote to memory of 3968	2628	QuasarVPn.exe	88
PID 2628 wrote to memory of 3968	2628	QuasarVPn.exe	88

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\jjsploits.exe
"C:\Users\Admin\AppData\Local\Temp\jjsploits.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\QuasarVPn.exe
  "C:\Users\Admin\AppData\Local\Temp\QuasarVPn.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2628
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WIndowsUpdSys" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3968

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\QuasarVPn.exe

Filesize
3.1MB

MD5
c0dd6cbc81e62211d33a7ace6689df29

SHA1
6d9a53ebefa08723e9e894fd551fbed18920348b

SHA256
35f9adc3cb2f89c4ae5e97a1ecbc3c7dfac4d3af85e87025f543db329cbb97c7

SHA512
7fe205e5b185fe5baed3e5ce5f89a4cdbd2a6d46111c8d813c89080ecca60010d3a4ce9a35d8433e48c8a5a7e5b2dd737d52ae66b9795eb320c52746ecd5265f

Download Submit
memory/2628-14-0x00007FF908483000-0x00007FF908485000-memory.dmp

Filesize
8KB

Download
memory/2628-15-0x0000000000A00000-0x0000000000D24000-memory.dmp

Filesize
3.1MB

Download
memory/2628-16-0x00007FF908480000-0x00007FF908F41000-memory.dmp

Filesize
10.8MB

Download
memory/2628-17-0x000000001C090000-0x000000001C0E0000-memory.dmp

Filesize
320KB

Download
memory/2628-18-0x000000001C1A0000-0x000000001C252000-memory.dmp

Filesize
712KB

Download
memory/2628-19-0x00007FF908483000-0x00007FF908485000-memory.dmp

Filesize
8KB

Download
memory/2628-20-0x00007FF908480000-0x00007FF908F41000-memory.dmp

Filesize
10.8MB

Download