quasar | 7b718d668fa3aed991ee8b9fc8f76fed543e5045f411369df659ee4cf09a0413

Analysis

max time kernel
104s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
01/04/2025, 17:05

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General

Target

Clientv2.exe
Size

3.2MB
MD5

f312e5b89c544d808859a09fbf8e6e9a
SHA1

917b95dc9c0f5ca7f089ad645c99395419914f37
SHA256

7b718d668fa3aed991ee8b9fc8f76fed543e5045f411369df659ee4cf09a0413
SHA512

2f894bb5f89e403fd22c2b2437043b8e79092f4d019a10fe13db3b89689374c6379af7372723bd343095b1b036b773d8ee3e1b95b955a452c46e0dac74c51b5b
SSDEEP

49152:wvdt62XlaSFNWPjljiFa2RoUYIzlRJ6MbR3LoGdkTHHB72eh2NT:wvf62XlaSFNWPjljiFXRoUYIzlRJ6W

Score

10^/10

quasar quasarv2 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Quasarv2

178.83.80.11:4782

Mutex

01be4b22-353e-48a7-a4fc-41ed4d3b5081

Attributes

encryption_key
B729697B6EECAC23F05DCF0A1F0857B793DF22A5
install_name
WinStart.exe
log_directory
TempLogs
reconnect_delay
3000
startup_key
WinStart
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
behavioral1/memory/3216-1-0x0000000000A20000-0x0000000000D54000-memory.dmp	family_quasar
behavioral1/files/0x00080000000242da-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
6132	WinStart.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
2656	schtasks.exe
984	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3216	Clientv2.exe
Token: SeDebugPrivilege	6132	WinStart.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
6132	WinStart.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3216 wrote to memory of 2656	3216	Clientv2.exe	87
PID 3216 wrote to memory of 2656	3216	Clientv2.exe	87
PID 3216 wrote to memory of 6132	3216	Clientv2.exe	90
PID 3216 wrote to memory of 6132	3216	Clientv2.exe	90
PID 6132 wrote to memory of 984	6132	WinStart.exe	92
PID 6132 wrote to memory of 984	6132	WinStart.exe	92

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\Clientv2.exe
"C:\Users\Admin\AppData\Local\Temp\Clientv2.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3216
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WinStart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WinStart.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2656
- C:\Users\Admin\AppData\Roaming\SubDir\WinStart.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\WinStart.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:6132
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WinStart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WinStart.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:984

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\WinStart.exe

Filesize
3.2MB

MD5
f312e5b89c544d808859a09fbf8e6e9a

SHA1
917b95dc9c0f5ca7f089ad645c99395419914f37

SHA256
7b718d668fa3aed991ee8b9fc8f76fed543e5045f411369df659ee4cf09a0413

SHA512
2f894bb5f89e403fd22c2b2437043b8e79092f4d019a10fe13db3b89689374c6379af7372723bd343095b1b036b773d8ee3e1b95b955a452c46e0dac74c51b5b

Download Submit
memory/3216-0-0x00007FFA841D3000-0x00007FFA841D5000-memory.dmp

Filesize
8KB

Download
memory/3216-1-0x0000000000A20000-0x0000000000D54000-memory.dmp

Filesize
3.2MB

Download
memory/3216-2-0x00007FFA841D0000-0x00007FFA84C91000-memory.dmp

Filesize
10.8MB

Download
memory/3216-9-0x00007FFA841D0000-0x00007FFA84C91000-memory.dmp

Filesize
10.8MB

Download
memory/6132-10-0x00007FFA841D0000-0x00007FFA84C91000-memory.dmp

Filesize
10.8MB

Download
memory/6132-11-0x00007FFA841D0000-0x00007FFA84C91000-memory.dmp

Filesize
10.8MB

Download
memory/6132-12-0x0000000002EC0000-0x0000000002F10000-memory.dmp

Filesize
320KB

Download
memory/6132-13-0x000000001C1D0000-0x000000001C282000-memory.dmp

Filesize
712KB

Download
memory/6132-16-0x000000001B950000-0x000000001B962000-memory.dmp

Filesize
72KB

Download
memory/6132-17-0x000000001C8D0000-0x000000001C90C000-memory.dmp

Filesize
240KB

Download
memory/6132-18-0x00007FFA841D0000-0x00007FFA84C91000-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