quasar | 28174e01123c6a52e6d47655dfa108384a81d0cccdbd94843689ba08be928453

Analysis

max time kernel
34s
max time network
44s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
12-05-2024 13:10

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General

Target

Rat.exe
Size

3.1MB
MD5

9fb2e5556886a91ed7805b9d835defd2
SHA1

4b54c11066f327c76f09b8de64715fee3f02fd34
SHA256

28174e01123c6a52e6d47655dfa108384a81d0cccdbd94843689ba08be928453
SHA512

e9dd5e7b7c0ff5406ca23c17bf6451c717391b0f8fc5ff54809ed552b41a1e7d71bbd6128cbf570976b2a48299cc72625d6d485960256009df33a6d80810ba54
SSDEEP

49152:OvIt62XlaSFNWPjljiFa2RoUYInIxNESE8k/iRLoGdRTHHB72eh2NT:OvE62XlaSFNWPjljiFXRoUYIIxDh

Score

10^/10

quasar 1 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

192.168.178.159:4782

Mutex

f9476288-ca6f-4357-825f-b24fff8428a1

Attributes

encryption_key
5B16BA8922577B4F360F28D3FADAD0E8E87825EE
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
x64
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral3/memory/3308-1-0x0000000000B30000-0x0000000000E54000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

3948 Client.exe
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

3656 schtasks.exe
4628 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Rat.exeClient.exe

description pid process

Token: SeDebugPrivilege 3308 Rat.exe
Token: SeDebugPrivilege 3948 Client.exe

pid	process
3948	Client.exe

pid	process
3656	schtasks.exe
4628	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3308	Rat.exe
Token: SeDebugPrivilege	3948	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Rat.exeClient.exe

description	pid	process	target process
PID 3308 wrote to memory of 3656	3308	Rat.exe	schtasks.exe
PID 3308 wrote to memory of 3656	3308	Rat.exe	schtasks.exe
PID 3308 wrote to memory of 3948	3308	Rat.exe	Client.exe
PID 3308 wrote to memory of 3948	3308	Rat.exe	Client.exe
PID 3948 wrote to memory of 4628	3948	Client.exe	schtasks.exe
PID 3948 wrote to memory of 4628	3948	Client.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\Rat.exe
"C:\Users\Admin\AppData\Local\Temp\Rat.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3308

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "x64" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:3656

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3948

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "x64" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:4628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

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\Client.exe

Filesize
3.1MB

MD5
9fb2e5556886a91ed7805b9d835defd2

SHA1
4b54c11066f327c76f09b8de64715fee3f02fd34

SHA256
28174e01123c6a52e6d47655dfa108384a81d0cccdbd94843689ba08be928453

SHA512
e9dd5e7b7c0ff5406ca23c17bf6451c717391b0f8fc5ff54809ed552b41a1e7d71bbd6128cbf570976b2a48299cc72625d6d485960256009df33a6d80810ba54

Download Submit
memory/3308-0-0x00007FFF0D8F3000-0x00007FFF0D8F5000-memory.dmp

Filesize
8KB

Download
memory/3308-1-0x0000000000B30000-0x0000000000E54000-memory.dmp

Filesize
3.1MB

Download
memory/3308-2-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3308-9-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3948-10-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3948-11-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3948-12-0x000000001B7D0000-0x000000001B820000-memory.dmp

Filesize
320KB

Download
memory/3948-13-0x000000001C310000-0x000000001C3C2000-memory.dmp

Filesize
712KB

Download
memory/3948-14-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download