quasar | 65603e83477ef928bedc7aa918d3b1dee61896f602fa3313a74188fbcb965596

Analysis

max time kernel
149s
max time network
151s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
04-12-2024 06:27

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General

Target

Pulse.exe
Size

3.2MB
MD5

535322149244cd68409b0993ae2a754c
SHA1

2853957fbf35d1a52eabf3e8a795f76d385d60bd
SHA256

65603e83477ef928bedc7aa918d3b1dee61896f602fa3313a74188fbcb965596
SHA512

18d31f91ebbf934daec9f887359088f5702efb8438e100d054a1009c14a614d38611e8fcc7562c9b81d0069a83439c58f40d5883abfd3005e9241be4ce4a2fc3
SSDEEP

49152:TvEt62XlaSFNWPjljiFa2RoUYIkCn1JyLoGdMTHHB72eh2NT:TvY62XlaSFNWPjljiFXRoUYIkCE

Score

10^/10

quasar enigma spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Enigma

192.168.1.86:4782

Mutex

bd83f1df-b3b7-42d7-8445-4f609db2329e

Attributes

encryption_key
F3A4FE9327E3E026CF9F5187588DCA6A20115433
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
host.exe
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/540-1-0x00000000006A0000-0x00000000009CE000-memory.dmp	family_quasar
behavioral1/files/0x0028000000045052-3.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
4176	Client.exe

Drops file in System32 directory 5 IoCs

Processes:

Pulse.exeClient.exe

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	Pulse.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Pulse.exe
File opened for modification	C:\Windows\system32\SubDir	Pulse.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client.exe
File opened for modification	C:\Windows\system32\SubDir	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
3128	schtasks.exe
4844	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Pulse.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	540	Pulse.exe
Token: SeDebugPrivilege	4176	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid	Process
4176	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid	Process
4176	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
4176	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Pulse.exeClient.exe

description	pid	Process	procid_target
PID 540 wrote to memory of 3128	540	Pulse.exe	82
PID 540 wrote to memory of 3128	540	Pulse.exe	82
PID 540 wrote to memory of 4176	540	Pulse.exe	84
PID 540 wrote to memory of 4176	540	Pulse.exe	84
PID 4176 wrote to memory of 4844	4176	Client.exe	85
PID 4176 wrote to memory of 4844	4176	Client.exe	85

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\Pulse.exe
"C:\Users\Admin\AppData\Local\Temp\Pulse.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:540
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "host.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3128
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4176
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "host.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4844

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4272

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:\Windows\System32\SubDir\Client.exe

Filesize
3.2MB

MD5
535322149244cd68409b0993ae2a754c

SHA1
2853957fbf35d1a52eabf3e8a795f76d385d60bd

SHA256
65603e83477ef928bedc7aa918d3b1dee61896f602fa3313a74188fbcb965596

SHA512
18d31f91ebbf934daec9f887359088f5702efb8438e100d054a1009c14a614d38611e8fcc7562c9b81d0069a83439c58f40d5883abfd3005e9241be4ce4a2fc3

Download Submit
memory/540-0-0x00007FFE5A503000-0x00007FFE5A505000-memory.dmp

Filesize
8KB

Download
memory/540-1-0x00000000006A0000-0x00000000009CE000-memory.dmp

Filesize
3.2MB

Download
memory/540-2-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/540-9-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/4176-5-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/4176-6-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/4176-7-0x000000001B900000-0x000000001B950000-memory.dmp

Filesize
320KB

Download
memory/4176-8-0x000000001CA60000-0x000000001CB12000-memory.dmp

Filesize
712KB

Download
memory/4176-10-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/4176-11-0x000000001D390000-0x000000001D8B8000-memory.dmp

Filesize
5.2MB

Download