quasar | 4bddfdcba09c9f9e59fda803daa9ec70f752eb0184845c998858fda6ae6db7fc

Analysis

max time kernel
124s
max time network
140s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
07-12-2024 14:10

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General

Target

virus.exe
Size

3.1MB
MD5

73b5cbd365dd4c4f8d79f90ad2f39a04
SHA1

c4b793be677c7d741483b50165424197582f62a5
SHA256

4bddfdcba09c9f9e59fda803daa9ec70f752eb0184845c998858fda6ae6db7fc
SHA512

41182462081f190f94c71fc1c1cf94e6737b39c05d21c1c5ceb933ec851cae8c756ee2823f6858b2a141e54913f86ad7a07a0d622d302331cd5f087a32759bdf
SSDEEP

49152:KvelL26AaNeWgPhlmVqvMQ7XSK2C5F1vSLo4dUGTHHB72eh2NT:KvOL26AaNeWgPhlmVqkQ7XSK2C5c

Score

10^/10

quasar roar spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

roar

fojeweb571-59953.portmap.host:59953

Mutex

be18500e-48e3-4692-8887-f0261df08045

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/5072-1-0x00000000008F0000-0x0000000000C14000-memory.dmp	family_quasar
behavioral2/files/0x001c00000002aa81-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4084	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
2812	schtasks.exe
4568	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5072	virus.exe
Token: SeDebugPrivilege	4084	windows defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4084	windows defender.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5072 wrote to memory of 2812	5072	virus.exe	77
PID 5072 wrote to memory of 2812	5072	virus.exe	77
PID 5072 wrote to memory of 4084	5072	virus.exe	79
PID 5072 wrote to memory of 4084	5072	virus.exe	79
PID 4084 wrote to memory of 4568	4084	windows defender.exe	80
PID 4084 wrote to memory of 4568	4084	windows defender.exe	80

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\virus.exe
"C:\Users\Admin\AppData\Local\Temp\virus.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5072
- 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:2812
- 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:4084
- - 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:4568

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
73b5cbd365dd4c4f8d79f90ad2f39a04

SHA1
c4b793be677c7d741483b50165424197582f62a5

SHA256
4bddfdcba09c9f9e59fda803daa9ec70f752eb0184845c998858fda6ae6db7fc

SHA512
41182462081f190f94c71fc1c1cf94e6737b39c05d21c1c5ceb933ec851cae8c756ee2823f6858b2a141e54913f86ad7a07a0d622d302331cd5f087a32759bdf

Download Submit
memory/4084-9-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/4084-11-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/4084-12-0x000000001B4E0000-0x000000001B530000-memory.dmp

Filesize
320KB

Download
memory/4084-13-0x000000001BD20000-0x000000001BDD2000-memory.dmp

Filesize
712KB

Download
memory/4084-16-0x000000001BC60000-0x000000001BC72000-memory.dmp

Filesize
72KB

Download
memory/4084-17-0x000000001BCC0000-0x000000001BCFC000-memory.dmp

Filesize
240KB

Download
memory/4084-18-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/5072-0-0x00007FFEC3A73000-0x00007FFEC3A75000-memory.dmp

Filesize
8KB

Download
memory/5072-1-0x00000000008F0000-0x0000000000C14000-memory.dmp

Filesize
3.1MB

Download
memory/5072-2-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/5072-10-0x00007FFEC3A70000-0x00007FFEC4532000-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