quasar | 56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac

Analysis

max time kernel
150s
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
17-12-2024 02:47

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General

Target

56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe
Size

3.1MB
MD5

29de30606fa3cd9024d87066016d0351
SHA1

32af15b435a5f26655947612fe30da89b5a29370
SHA256

56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac
SHA512

6fbe73cddab8a943d1ce060da1a3d26832616aefad76fe3b1dbd71991e4412a591133aee34df6a467a15acce8c587ea1420ca2f0dc4c8c77d54b8712a00a9355
SSDEEP

49152:KvyI22SsaNYfdPBldt698dBcjHwCV1JupoGdaELTHHB72eh2NT:Kvf22SsaNYfdPBldt6+dBcjHwC8

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.100.18:4782

Mutex

2cbe985c-9a4f-4f1f-a761-cd05d5feff4b

Attributes

encryption_key
9493303F9F1D303190787B3D987F2DCB2BAF3CFD
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/3764-1-0x00000000002D0000-0x00000000005F4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b6b-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4632	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
2560	schtasks.exe
3976	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3764	56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe
Token: SeDebugPrivilege	4632	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4632	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3764 wrote to memory of 3976	3764	56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe	82
PID 3764 wrote to memory of 3976	3764	56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe	82
PID 3764 wrote to memory of 4632	3764	56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe	84
PID 3764 wrote to memory of 4632	3764	56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe	84
PID 4632 wrote to memory of 2560	4632	Client.exe	85
PID 4632 wrote to memory of 2560	4632	Client.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\56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe
"C:\Users\Admin\AppData\Local\Temp\56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3764
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3976
- 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:4632
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2560

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
29de30606fa3cd9024d87066016d0351

SHA1
32af15b435a5f26655947612fe30da89b5a29370

SHA256
56a35f9bcb582449d44a4bed4fa36dcb140f04961f0f1fec1d96385569f72cac

SHA512
6fbe73cddab8a943d1ce060da1a3d26832616aefad76fe3b1dbd71991e4412a591133aee34df6a467a15acce8c587ea1420ca2f0dc4c8c77d54b8712a00a9355

Download Submit
memory/3764-0-0x00007FFBD2923000-0x00007FFBD2925000-memory.dmp

Filesize
8KB

Download
memory/3764-1-0x00000000002D0000-0x00000000005F4000-memory.dmp

Filesize
3.1MB

Download
memory/3764-2-0x00007FFBD2920000-0x00007FFBD33E1000-memory.dmp

Filesize
10.8MB

Download
memory/3764-10-0x00007FFBD2920000-0x00007FFBD33E1000-memory.dmp

Filesize
10.8MB

Download
memory/4632-9-0x00007FFBD2920000-0x00007FFBD33E1000-memory.dmp

Filesize
10.8MB

Download
memory/4632-11-0x00007FFBD2920000-0x00007FFBD33E1000-memory.dmp

Filesize
10.8MB

Download
memory/4632-12-0x000000001D240000-0x000000001D290000-memory.dmp

Filesize
320KB

Download
memory/4632-13-0x000000001D350000-0x000000001D402000-memory.dmp

Filesize
712KB

Download
memory/4632-14-0x00007FFBD2920000-0x00007FFBD33E1000-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