quasar | 10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2024 02:02

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General

Target

10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.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

resource	yara_rule
behavioral2/memory/3172-1-0x00000000009C0000-0x0000000000CE4000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023cae-8.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3552	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
3204	schtasks.exe
3952	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3172	10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.exe
Token: SeDebugPrivilege	3552	Windows Defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3552	Windows Defender.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 3204	3172	10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.exe	82
PID 3172 wrote to memory of 3204	3172	10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.exe	82
PID 3172 wrote to memory of 3552	3172	10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.exe	84
PID 3172 wrote to memory of 3552	3172	10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.exe	84
PID 3552 wrote to memory of 3952	3552	Windows Defender.exe	85
PID 3552 wrote to memory of 3952	3552	Windows Defender.exe	85

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\10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.exe
"C:\Users\Admin\AppData\Local\Temp\10a790a9b50e4c6f915746b6794d78015c30d86f929e001cdb473a7d6c12bda3.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3172
- 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:3204
- 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:3552
- - 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:3952

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/3172-0-0x00007FF9D5903000-0x00007FF9D5905000-memory.dmp

Filesize
8KB

Download
memory/3172-1-0x00000000009C0000-0x0000000000CE4000-memory.dmp

Filesize
3.1MB

Download
memory/3172-2-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/3172-9-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/3552-10-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/3552-11-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/3552-12-0x000000001B4E0000-0x000000001B530000-memory.dmp

Filesize
320KB

Download
memory/3552-13-0x000000001D740000-0x000000001D7F2000-memory.dmp

Filesize
712KB

Download
memory/3552-14-0x00007FF9D5900000-0x00007FF9D63C1000-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