quasar | ca3111848c23a14de0a9b6074f952c195ae1adaccaa768889c6f84cdfb044baa

Analysis

max time kernel
28s
max time network
30s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
06-11-2024 22:02

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Creo.exe
Size

3.1MB
MD5

03aa151b986c25898130caa67cfc881d
SHA1

7248b1c0d26266ccf348ba2a21fd1ece572202b7
SHA256

ca3111848c23a14de0a9b6074f952c195ae1adaccaa768889c6f84cdfb044baa
SHA512

41bebb66e465b2e62ae144e0b095654906d8826751cce0c833de0f35b41a9caaf90b39de74e775e3af419269c2e941499562d59de3a0a8a5e9bec40d181f7c9f
SSDEEP

49152:uvyI22SsaNYfdPBldt698dBcjHLLjflEmLrk/znLZGdTLITHHB72eh2NT:uvf22SsaNYfdPBldt6+dBcjHnjfCLoL

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.9:62767

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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

Processes:

resource	yara_rule
behavioral1/memory/4256-1-0x0000000000F60000-0x0000000001284000-memory.dmp	family_quasar
behavioral1/files/0x0029000000045040-3.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
2100	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

Processes:

schtasks.exeschtasks.exe

pid	Process
3644	schtasks.exe
4060	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Creo.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	4256	Creo.exe
Token: SeDebugPrivilege	2100	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2100	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Creo.exeClient.exe

description	pid	Process	procid_target
PID 4256 wrote to memory of 3644	4256	Creo.exe	84
PID 4256 wrote to memory of 3644	4256	Creo.exe	84
PID 4256 wrote to memory of 2100	4256	Creo.exe	86
PID 4256 wrote to memory of 2100	4256	Creo.exe	86
PID 2100 wrote to memory of 4060	2100	Client.exe	87
PID 2100 wrote to memory of 4060	2100	Client.exe	87

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\Creo.exe
"C:\Users\Admin\AppData\Local\Temp\Creo.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4256
- 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:3644
- 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:2100
- - 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:4060

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
03aa151b986c25898130caa67cfc881d

SHA1
7248b1c0d26266ccf348ba2a21fd1ece572202b7

SHA256
ca3111848c23a14de0a9b6074f952c195ae1adaccaa768889c6f84cdfb044baa

SHA512
41bebb66e465b2e62ae144e0b095654906d8826751cce0c833de0f35b41a9caaf90b39de74e775e3af419269c2e941499562d59de3a0a8a5e9bec40d181f7c9f

Download Submit
memory/2100-5-0x00007FF96E5B0000-0x00007FF96F072000-memory.dmp

Filesize
10.8MB

Download
memory/2100-7-0x00007FF96E5B0000-0x00007FF96F072000-memory.dmp

Filesize
10.8MB

Download
memory/2100-8-0x000000001BE30000-0x000000001BE80000-memory.dmp

Filesize
320KB

Download
memory/2100-9-0x000000001D2F0000-0x000000001D3A2000-memory.dmp

Filesize
712KB

Download
memory/2100-10-0x00007FF96E5B0000-0x00007FF96F072000-memory.dmp

Filesize
10.8MB

Download
memory/4256-0-0x00007FF96E5B3000-0x00007FF96E5B5000-memory.dmp

Filesize
8KB

Download
memory/4256-1-0x0000000000F60000-0x0000000001284000-memory.dmp

Filesize
3.1MB

Download
memory/4256-2-0x00007FF96E5B0000-0x00007FF96F072000-memory.dmp

Filesize
10.8MB

Download
memory/4256-6-0x00007FF96E5B0000-0x00007FF96F072000-memory.dmp

Filesize
10.8MB

Download