quasar | 705a6a49aa16e995ea92d6f866a61c5d4e7b9eb4ec9986af35ce5b488c45fbb9

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-01-2025 17:55

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

9f21cf43d032fc842837ef4b192140aa
SHA1

20464f746717ef1d9e7d4424a489bb07f9e0fc43
SHA256

705a6a49aa16e995ea92d6f866a61c5d4e7b9eb4ec9986af35ce5b488c45fbb9
SHA512

30ebc041afb9ca8990787a60bb3be189926e61c42897e99dd1b1a05a87a1a1679c0a60466670e3be0bf485d5aadf5898e993e1b883cdd924d7bfec56b0f9ad6f
SSDEEP

49152:CvIt62XlaSFNWPjljiFa2RoUYIL5zapoGBXTHHB72eh2NT:CvE62XlaSFNWPjljiFXRoUYIL5z2

Score

10^/10

quasar client spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Client

45.202.32.36:1111

Mutex

30f39ce2-55fb-4edc-9531-3fb9e6ba4912

Attributes

encryption_key
9ABAA568E3BFACC1828658EB883F521748218E8E
install_name
Updaterr.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Updater
subdirectory
Discord

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/4468-1-0x00000000006C0000-0x00000000009E4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b91-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4500	Updaterr.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
2880	schtasks.exe
4832	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4468	Client-built.exe
Token: SeDebugPrivilege	4500	Updaterr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4468 wrote to memory of 2880	4468	Client-built.exe	83
PID 4468 wrote to memory of 2880	4468	Client-built.exe	83
PID 4468 wrote to memory of 4500	4468	Client-built.exe	85
PID 4468 wrote to memory of 4500	4468	Client-built.exe	85
PID 4500 wrote to memory of 4832	4500	Updaterr.exe	86
PID 4500 wrote to memory of 4832	4500	Updaterr.exe	86

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4468
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2880
- C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe
  "C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4500
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4832

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\Discord\Updaterr.exe

Filesize
3.1MB

MD5
9f21cf43d032fc842837ef4b192140aa

SHA1
20464f746717ef1d9e7d4424a489bb07f9e0fc43

SHA256
705a6a49aa16e995ea92d6f866a61c5d4e7b9eb4ec9986af35ce5b488c45fbb9

SHA512
30ebc041afb9ca8990787a60bb3be189926e61c42897e99dd1b1a05a87a1a1679c0a60466670e3be0bf485d5aadf5898e993e1b883cdd924d7bfec56b0f9ad6f

Download Submit
memory/4468-0-0x00007FFCD9873000-0x00007FFCD9875000-memory.dmp

Filesize
8KB

Download
memory/4468-1-0x00000000006C0000-0x00000000009E4000-memory.dmp

Filesize
3.1MB

Download
memory/4468-2-0x00007FFCD9870000-0x00007FFCDA331000-memory.dmp

Filesize
10.8MB

Download
memory/4468-10-0x00007FFCD9870000-0x00007FFCDA331000-memory.dmp

Filesize
10.8MB

Download
memory/4500-9-0x00007FFCD9870000-0x00007FFCDA331000-memory.dmp

Filesize
10.8MB

Download
memory/4500-11-0x00007FFCD9870000-0x00007FFCDA331000-memory.dmp

Filesize
10.8MB

Download
memory/4500-12-0x000000001BB50000-0x000000001BBA0000-memory.dmp

Filesize
320KB

Download
memory/4500-13-0x000000001C270000-0x000000001C322000-memory.dmp

Filesize
712KB

Download
memory/4500-14-0x00007FFCD9870000-0x00007FFCDA331000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads