quasar | 3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
30/01/2025, 07:56

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General

Target

3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
Size

3.1MB
MD5

fbb44da2d0860af30fc45116529832df
SHA1

44377732b9959172cdb261d366069801adafd52a
SHA256

3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31
SHA512

b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909
SSDEEP

49152:Pvyt62XlaSFNWPjljiFa2RoUYIonF7KoGd1GKuTHHB72eh2NT:Pva62XlaSFNWPjljiFXRoUYIonFW

Score

10^/10

quasar svhost32 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svhost32

87.228.57.81:4782

Mutex

47b71fc0-b2c4-4112-b97a-39385a5399c1

Attributes

encryption_key
19A0FAF8459F69650B5965C225752D425C429EEC
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svhost32
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/4784-1-0x0000000000380000-0x00000000006A4000-memory.dmp	family_quasar
behavioral2/files/0x0011000000023a6a-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3832	Client.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
2972	schtasks.exe
3824	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4784	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
Token: SeDebugPrivilege	3832	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3832	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 2972	4784	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	85
PID 4784 wrote to memory of 2972	4784	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	85
PID 4784 wrote to memory of 3832	4784	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	87
PID 4784 wrote to memory of 3832	4784	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	87
PID 3832 wrote to memory of 3824	3832	Client.exe	88
PID 3832 wrote to memory of 3824	3832	Client.exe	88

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\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
"C:\Users\Admin\AppData\Local\Temp\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2972
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3832
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3824

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\Client.exe

Filesize
3.1MB

MD5
fbb44da2d0860af30fc45116529832df

SHA1
44377732b9959172cdb261d366069801adafd52a

SHA256
3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31

SHA512
b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909

Download Submit
memory/3832-10-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

Filesize
10.8MB

Download
memory/3832-11-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

Filesize
10.8MB

Download
memory/3832-12-0x000000001B580000-0x000000001B5D0000-memory.dmp

Filesize
320KB

Download
memory/3832-13-0x000000001BEE0000-0x000000001BF92000-memory.dmp

Filesize
712KB

Download
memory/3832-14-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

Filesize
10.8MB

Download
memory/4784-0-0x00007FFCAD173000-0x00007FFCAD175000-memory.dmp

Filesize
8KB

Download
memory/4784-1-0x0000000000380000-0x00000000006A4000-memory.dmp

Filesize
3.1MB

Download
memory/4784-2-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

Filesize
10.8MB

Download
memory/4784-9-0x00007FFCAD170000-0x00007FFCADC31000-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