quasar | 569da6bbe85c8810e6f9cf1b884be9257a227d4c29c4c81888999c0e583cba80

Analysis

max time kernel
126s
max time network
136s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-11-2024 22:08

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General

Target

porfaaa.exe
Size

3.1MB
MD5

6a0e509826fa8bbebabe5f79ace2ef27
SHA1

aec54ebce312edce5ba80335aebcc7b599383166
SHA256

569da6bbe85c8810e6f9cf1b884be9257a227d4c29c4c81888999c0e583cba80
SHA512

442653aa58c5287131e7d4ac90609c4f05a92992e44d9efadd06bed60e25bd1f7eb2f89588b792243dc4b70cd1f64e2f017874e1a6b38b9807de2c90c9afcfaf
SSDEEP

49152:3vyI22SsaNYfdPBldt698dBcjH7bRJ65bR3LoGd4BTHHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjH7bRJ67I

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.9:139

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 3 IoCs

resource	yara_rule
behavioral1/memory/2780-1-0x0000000001260000-0x0000000001584000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015ed2-6.dat	family_quasar
behavioral1/memory/1792-9-0x0000000001320000-0x0000000001644000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1792	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

pid	Process
2708	schtasks.exe
2716	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2780	porfaaa.exe
Token: SeDebugPrivilege	1792	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1792	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 2716	2780	porfaaa.exe	31
PID 2780 wrote to memory of 2716	2780	porfaaa.exe	31
PID 2780 wrote to memory of 2716	2780	porfaaa.exe	31
PID 2780 wrote to memory of 1792	2780	porfaaa.exe	33
PID 2780 wrote to memory of 1792	2780	porfaaa.exe	33
PID 2780 wrote to memory of 1792	2780	porfaaa.exe	33
PID 1792 wrote to memory of 2708	1792	Client.exe	34
PID 1792 wrote to memory of 2708	1792	Client.exe	34
PID 1792 wrote to memory of 2708	1792	Client.exe	34

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\porfaaa.exe
"C:\Users\Admin\AppData\Local\Temp\porfaaa.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2780
- 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:2716
- 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:1792
- - 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:2708

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
6a0e509826fa8bbebabe5f79ace2ef27

SHA1
aec54ebce312edce5ba80335aebcc7b599383166

SHA256
569da6bbe85c8810e6f9cf1b884be9257a227d4c29c4c81888999c0e583cba80

SHA512
442653aa58c5287131e7d4ac90609c4f05a92992e44d9efadd06bed60e25bd1f7eb2f89588b792243dc4b70cd1f64e2f017874e1a6b38b9807de2c90c9afcfaf

Download Submit
memory/1792-10-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/1792-9-0x0000000001320000-0x0000000001644000-memory.dmp

Filesize
3.1MB

Download
memory/1792-11-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/1792-12-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2780-0-0x000007FEF5BB3000-0x000007FEF5BB4000-memory.dmp

Filesize
4KB

Download
memory/2780-1-0x0000000001260000-0x0000000001584000-memory.dmp

Filesize
3.1MB

Download
memory/2780-2-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2780-8-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads