quasar | 10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2024 22:49

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General

Target

10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe
Size

3.1MB
MD5

f8e14830219b5f706d5be0a308d17a91
SHA1

7770bea20a180cc35e33ec74fc78cf6ba4be10a7
SHA256

10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3
SHA512

e631910f7e833894b60373cd342ccca33d8237e7f6b049b515b53f612beb827d230b0d865703f9f563a9674cb63697e6ced3623125c7b6bb307d8286391f46e6
SSDEEP

49152:XvBhBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkaOSX3varsLoGd5THHB72eh2NT:XvJt2d5aKCuVPzlEmVQ0wvwfT3V

Score

10^/10

quasar windows defender spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Windows Defender

UID2024-57338.portmap.io:57338

Mutex

492cae3d-ab2c-4ceb-af93-7e8c4a52fe41

Attributes

encryption_key
B625DA4A24D0BDCC91D89338E0FFF1CC2FADBB51
install_name
Windows Defender.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Defender
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
behavioral2/memory/4296-1-0x0000000000A10000-0x0000000000D34000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Windows Defender.exe

pid process

8 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

Processes:

schtasks.exeschtasks.exe

pid process

3184 schtasks.exe
2908 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exeWindows Defender.exe

description pid process

Token: SeDebugPrivilege 4296 10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe
Token: SeDebugPrivilege 8 Windows Defender.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Defender.exe

pid process

8 Windows Defender.exe

pid	process
8	Windows Defender.exe

pid	process
3184	schtasks.exe
2908	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4296	10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe
Token: SeDebugPrivilege	8	Windows Defender.exe

pid	process
8	Windows Defender.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exeWindows Defender.exe

description	pid	process	target process
PID 4296 wrote to memory of 2908	4296	10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe	schtasks.exe
PID 4296 wrote to memory of 2908	4296	10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe	schtasks.exe
PID 4296 wrote to memory of 8	4296	10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe	Windows Defender.exe
PID 4296 wrote to memory of 8	4296	10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe	Windows Defender.exe
PID 8 wrote to memory of 3184	8	Windows Defender.exe	schtasks.exe
PID 8 wrote to memory of 3184	8	Windows Defender.exe	schtasks.exe

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\10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe
"C:\Users\Admin\AppData\Local\Temp\10a790a9b50e4c6f915746b6794d78015c30d86f929e0.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4296
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2908
- 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:8
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3184

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
f8e14830219b5f706d5be0a308d17a91

SHA1
7770bea20a180cc35e33ec74fc78cf6ba4be10a7

SHA256
10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3

SHA512
e631910f7e833894b60373cd342ccca33d8237e7f6b049b515b53f612beb827d230b0d865703f9f563a9674cb63697e6ced3623125c7b6bb307d8286391f46e6

Download Submit
memory/8-9-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/8-11-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/8-12-0x000000001BE00000-0x000000001BE50000-memory.dmp

Filesize
320KB

Download
memory/8-13-0x000000001BF10000-0x000000001BFC2000-memory.dmp

Filesize
712KB

Download
memory/8-14-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/4296-0-0x00007FFB42953000-0x00007FFB42955000-memory.dmp

Filesize
8KB

Download
memory/4296-1-0x0000000000A10000-0x0000000000D34000-memory.dmp

Filesize
3.1MB

Download
memory/4296-2-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/4296-10-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download