quasar | e25691712b6dd0ed09c02159c0833d5dba232d02e0a12fbdf4788fdd4634e9fb

Analysis

max time kernel
31s
max time network
32s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-11-2024 19:58

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General

Target

Scarrryy.exe
Size

3.2MB
MD5

4f2d9af5e6f1891b5ffd4ff60e87235c
SHA1

3c423bcc4afe0d3cca963890f3f79e3650aedb9d
SHA256

e25691712b6dd0ed09c02159c0833d5dba232d02e0a12fbdf4788fdd4634e9fb
SHA512

15e5e89482130f50ff4a2ea44c00f784dc2ab4e4a16f715fd11147faf11c1c1f37c39e85eab74d308c60a8e26b567b2e887765253a790caa6b43e14af3a1dced
SSDEEP

49152:Yvkt62XlaSFNWPjljiFa2RoUYIpFkimz+poGdTTHHB72eh2NTw:Yv462XlaSFNWPjljiFXRoUYI/k6v

Score

10^/10

quasar system spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

System

9pos-34249.portmap.host:34249

Mutex

5a5ad719-5e12-4e45-afca-8518ea7cdfc7

Attributes

encryption_key
B5E5A954A4B31BE8EAAB08BEE8C15292BCEF3668
install_name
System.exe
log_directory
Logs
reconnect_delay
3000
startup_key
System
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/3004-1-0x00000000007C0000-0x0000000000AF4000-memory.dmp	family_quasar
behavioral1/files/0x0007000000023c9c-5.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

System.exe

pid	Process
1588	System.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
4332	schtasks.exe
4004	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Scarrryy.exeSystem.exe

description	pid	Process
Token: SeDebugPrivilege	3004	Scarrryy.exe
Token: SeDebugPrivilege	1588	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

System.exe

pid	Process
1588	System.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Scarrryy.exeSystem.exe

description	pid	Process	procid_target
PID 3004 wrote to memory of 4332	3004	Scarrryy.exe	86
PID 3004 wrote to memory of 4332	3004	Scarrryy.exe	86
PID 3004 wrote to memory of 1588	3004	Scarrryy.exe	88
PID 3004 wrote to memory of 1588	3004	Scarrryy.exe	88
PID 1588 wrote to memory of 4004	1588	System.exe	90
PID 1588 wrote to memory of 4004	1588	System.exe	90

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\Scarrryy.exe
"C:\Users\Admin\AppData\Local\Temp\Scarrryy.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4332
- C:\Users\Admin\AppData\Roaming\SubDir\System.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\System.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1588
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4004

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\System.exe

Filesize
3.2MB

MD5
4f2d9af5e6f1891b5ffd4ff60e87235c

SHA1
3c423bcc4afe0d3cca963890f3f79e3650aedb9d

SHA256
e25691712b6dd0ed09c02159c0833d5dba232d02e0a12fbdf4788fdd4634e9fb

SHA512
15e5e89482130f50ff4a2ea44c00f784dc2ab4e4a16f715fd11147faf11c1c1f37c39e85eab74d308c60a8e26b567b2e887765253a790caa6b43e14af3a1dced

Download Submit
memory/1588-9-0x00007FFA395E0000-0x00007FFA3A0A1000-memory.dmp

Filesize
10.8MB

Download
memory/1588-11-0x00007FFA395E0000-0x00007FFA3A0A1000-memory.dmp

Filesize
10.8MB

Download
memory/1588-12-0x000000001B900000-0x000000001B950000-memory.dmp

Filesize
320KB

Download
memory/1588-13-0x000000001C130000-0x000000001C1E2000-memory.dmp

Filesize
712KB

Download
memory/1588-14-0x00007FFA395E0000-0x00007FFA3A0A1000-memory.dmp

Filesize
10.8MB

Download
memory/3004-0-0x00007FFA395E3000-0x00007FFA395E5000-memory.dmp

Filesize
8KB

Download
memory/3004-1-0x00000000007C0000-0x0000000000AF4000-memory.dmp

Filesize
3.2MB

Download
memory/3004-2-0x00007FFA395E0000-0x00007FFA3A0A1000-memory.dmp

Filesize
10.8MB

Download
memory/3004-10-0x00007FFA395E0000-0x00007FFA3A0A1000-memory.dmp

Filesize
10.8MB

Download