quasar | 9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18

Analysis

max time kernel
416s
max time network
1051s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
29-11-2024 03:14

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Installer.exe
Size

3.1MB
MD5

19570d471b4f795bf854b8f8951d28f0
SHA1

9d43a2c713ca6d8d7ecf2b9546b24add96612994
SHA256

9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18
SHA512

f3f059d81f29f3e3607f9837be54226a5a82f83d64c812b01b6a3200abc3e3a41360a931dfe143c07359df5bb07bcb5dc695882a715ccf635c3ab5a54bb59298
SSDEEP

49152:3vyI22SsaNYfdPBldt698dBcjHAD6eCLogoGdGfTHHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjHAD63W

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

azxq0ap.localto.net:3425

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

resource	yara_rule
behavioral1/memory/5056-1-0x00000000008D0000-0x0000000000BF4000-memory.dmp	family_quasar
behavioral1/files/0x002a00000004511a-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1668	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
4336	schtasks.exe
544	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5056	Installer.exe
Token: SeDebugPrivilege	1668	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1668	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5056 wrote to memory of 4336	5056	Installer.exe	81
PID 5056 wrote to memory of 4336	5056	Installer.exe	81
PID 5056 wrote to memory of 1668	5056	Installer.exe	83
PID 5056 wrote to memory of 1668	5056	Installer.exe	83
PID 1668 wrote to memory of 544	1668	Client.exe	86
PID 1668 wrote to memory of 544	1668	Client.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\Installer.exe
"C:\Users\Admin\AppData\Local\Temp\Installer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5056
- 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:4336
- 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:1668
- - 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:544

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
19570d471b4f795bf854b8f8951d28f0

SHA1
9d43a2c713ca6d8d7ecf2b9546b24add96612994

SHA256
9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18

SHA512
f3f059d81f29f3e3607f9837be54226a5a82f83d64c812b01b6a3200abc3e3a41360a931dfe143c07359df5bb07bcb5dc695882a715ccf635c3ab5a54bb59298

Download Submit
memory/1668-6-0x00007FFB13E30000-0x00007FFB148F2000-memory.dmp

Filesize
10.8MB

Download
memory/1668-7-0x00007FFB13E30000-0x00007FFB148F2000-memory.dmp

Filesize
10.8MB

Download
memory/1668-8-0x000000001C7D0000-0x000000001C820000-memory.dmp

Filesize
320KB

Download
memory/1668-9-0x000000001C8E0000-0x000000001C992000-memory.dmp

Filesize
712KB

Download
memory/1668-12-0x000000001C870000-0x000000001C882000-memory.dmp

Filesize
72KB

Download
memory/1668-13-0x000000001CFE0000-0x000000001D01C000-memory.dmp

Filesize
240KB

Download
memory/1668-14-0x00007FFB13E30000-0x00007FFB148F2000-memory.dmp

Filesize
10.8MB

Download
memory/5056-0-0x00007FFB13E33000-0x00007FFB13E35000-memory.dmp

Filesize
8KB

Download
memory/5056-1-0x00000000008D0000-0x0000000000BF4000-memory.dmp

Filesize
3.1MB

Download
memory/5056-2-0x00007FFB13E30000-0x00007FFB148F2000-memory.dmp

Filesize
10.8MB

Download
memory/5056-5-0x00007FFB13E30000-0x00007FFB148F2000-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