quasar | 815ce2d6945fa3d5b5e7ea7d7c4b65d318255e700aa503ae70fa347217114b65

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-12-2024 16:47

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General

Target

Client-built.exe
Size

3.1MB
MD5

987547ab64e63245ed07964daef37f3b
SHA1

ea23278cfefdd48b9da3dd07ebb94e1194817587
SHA256

815ce2d6945fa3d5b5e7ea7d7c4b65d318255e700aa503ae70fa347217114b65
SHA512

2648df67c0e6654327539d00ce27ff79fdf4e357072ad82c5624eb74c9d53bc90ee91017d27ed31d9577fb9e5439a2ea8e2f27e0a934afee58b98c9de56a4e25
SSDEEP

49152:rvHG42pda6D+/PjlLOlg6yQipV8KRJ6ebR3LoGduTHHB72eh2NT:rvm42pda6D+/PjlLOlZyQipV8KRJ6Y

Score

10^/10

quasar thecoolfile spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

thecoolfile

dfsgmnhsrf23456623423456-51636.portmap.host:51636

Mutex

372f3f9f-1eba-429d-9b98-7c94499b8dbf

Attributes

encryption_key
B42CE86AEBA4D8818352F4D811EA7BBB472E229A
install_name
windows defender.exe
log_directory
Logs
reconnect_delay
3000
startup_key
discord
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/4524-1-0x0000000000D70000-0x0000000001094000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c96-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3968	windows defender.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
3380	schtasks.exe
3032	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4524	Client-built.exe
Token: SeDebugPrivilege	3968	windows defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3968	windows defender.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4524 wrote to memory of 3032	4524	Client-built.exe	83
PID 4524 wrote to memory of 3032	4524	Client-built.exe	83
PID 4524 wrote to memory of 3968	4524	Client-built.exe	85
PID 4524 wrote to memory of 3968	4524	Client-built.exe	85
PID 3968 wrote to memory of 3380	3968	windows defender.exe	86
PID 3968 wrote to memory of 3380	3968	windows defender.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4524
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3032
- C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3968
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3380

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\windows defender.exe

Filesize
3.1MB

MD5
987547ab64e63245ed07964daef37f3b

SHA1
ea23278cfefdd48b9da3dd07ebb94e1194817587

SHA256
815ce2d6945fa3d5b5e7ea7d7c4b65d318255e700aa503ae70fa347217114b65

SHA512
2648df67c0e6654327539d00ce27ff79fdf4e357072ad82c5624eb74c9d53bc90ee91017d27ed31d9577fb9e5439a2ea8e2f27e0a934afee58b98c9de56a4e25

Download Submit
memory/3968-9-0x00007FF940650000-0x00007FF941111000-memory.dmp

Filesize
10.8MB

Download
memory/3968-11-0x00007FF940650000-0x00007FF941111000-memory.dmp

Filesize
10.8MB

Download
memory/3968-12-0x0000000002860000-0x00000000028B0000-memory.dmp

Filesize
320KB

Download
memory/3968-13-0x000000001BC00000-0x000000001BCB2000-memory.dmp

Filesize
712KB

Download
memory/3968-14-0x00007FF940650000-0x00007FF941111000-memory.dmp

Filesize
10.8MB

Download
memory/4524-0-0x00007FF940653000-0x00007FF940655000-memory.dmp

Filesize
8KB

Download
memory/4524-1-0x0000000000D70000-0x0000000001094000-memory.dmp

Filesize
3.1MB

Download
memory/4524-2-0x00007FF940650000-0x00007FF941111000-memory.dmp

Filesize
10.8MB

Download
memory/4524-10-0x00007FF940650000-0x00007FF941111000-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