quasar | 815ce2d6945fa3d5b5e7ea7d7c4b65d318255e700aa503ae70fa347217114b65

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 3 IoCs

resource	yara_rule
behavioral1/memory/2508-1-0x0000000000EA0000-0x00000000011C4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016bfc-6.dat	family_quasar
behavioral1/memory/1864-9-0x00000000013D0000-0x00000000016F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1864	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
2560	schtasks.exe
2228	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2508	Client-built.exe
Token: SeDebugPrivilege	1864	windows defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1864	windows defender.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2508 wrote to memory of 2560	2508	Client-built.exe	30
PID 2508 wrote to memory of 2560	2508	Client-built.exe	30
PID 2508 wrote to memory of 2560	2508	Client-built.exe	30
PID 2508 wrote to memory of 1864	2508	Client-built.exe	32
PID 2508 wrote to memory of 1864	2508	Client-built.exe	32
PID 2508 wrote to memory of 1864	2508	Client-built.exe	32
PID 1864 wrote to memory of 2228	1864	windows defender.exe	33
PID 1864 wrote to memory of 2228	1864	windows defender.exe	33
PID 1864 wrote to memory of 2228	1864	windows defender.exe	33

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:2508
- 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:2560
- 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:1864
- - 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:2228

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/1864-8-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/1864-9-0x00000000013D0000-0x00000000016F4000-memory.dmp

Filesize
3.1MB

Download
memory/1864-11-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/1864-12-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/2508-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

Filesize
4KB

Download
memory/2508-1-0x0000000000EA0000-0x00000000011C4000-memory.dmp

Filesize
3.1MB

Download
memory/2508-2-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/2508-10-0x000007FEF5B00000-0x000007FEF64EC000-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