quasar | 7f0fce9d1d75bff354d35566d4a0eedc0ee9104633fd859b3566cf9bfa2a711b

Analysis

max time kernel
149s
max time network
152s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
30-11-2024 18:11

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General

Target

Client-built.exe
Size

3.1MB
MD5

20f05826273f12162fa4c07fd0c522ab
SHA1

eb45020a2a4a44128aa5805b34801ad4ae45cdc0
SHA256

7f0fce9d1d75bff354d35566d4a0eedc0ee9104633fd859b3566cf9bfa2a711b
SHA512

25c567a345f3fbcf0e18003d1d53cb34f3e7a7c37c628f0f4b2093a04b78c5fec994032e37b1bc1358bd0ba8beff221458e2ff0cdbe431560dfb2d60aac0c636
SSDEEP

98304:bvf22SsaNYfdPBldt6+dBcjHNbRJ6k1A:TQ7jL9

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.3:4782

Mutex

6c1cabdf-4141-46d8-99b5-498dc096c6c6

Attributes

encryption_key
A2D3322556CF1157C720ECB23F81C201C021107D
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
SecurityHealthSystray
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/3576-1-0x0000000000390000-0x00000000006B4000-memory.dmp	family_quasar
behavioral1/files/0x002a000000045187-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2804	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
1824	schtasks.exe
1076	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3576	Client-built.exe
Token: SeDebugPrivilege	2804	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2804	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3576 wrote to memory of 1824	3576	Client-built.exe	80
PID 3576 wrote to memory of 1824	3576	Client-built.exe	80
PID 3576 wrote to memory of 2804	3576	Client-built.exe	82
PID 3576 wrote to memory of 2804	3576	Client-built.exe	82
PID 2804 wrote to memory of 1076	2804	Client.exe	83
PID 2804 wrote to memory of 1076	2804	Client.exe	83

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:3576
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "SecurityHealthSystray" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1824
- 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:2804
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "SecurityHealthSystray" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1076

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

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Downloads

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

Filesize
3.1MB

MD5
20f05826273f12162fa4c07fd0c522ab

SHA1
eb45020a2a4a44128aa5805b34801ad4ae45cdc0

SHA256
7f0fce9d1d75bff354d35566d4a0eedc0ee9104633fd859b3566cf9bfa2a711b

SHA512
25c567a345f3fbcf0e18003d1d53cb34f3e7a7c37c628f0f4b2093a04b78c5fec994032e37b1bc1358bd0ba8beff221458e2ff0cdbe431560dfb2d60aac0c636

Download Submit
memory/2804-6-0x00007FFC5E460000-0x00007FFC5EF22000-memory.dmp

Filesize
10.8MB

Download
memory/2804-7-0x00007FFC5E460000-0x00007FFC5EF22000-memory.dmp

Filesize
10.8MB

Download
memory/2804-8-0x000000001B1C0000-0x000000001B210000-memory.dmp

Filesize
320KB

Download
memory/2804-9-0x000000001C2E0000-0x000000001C392000-memory.dmp

Filesize
712KB

Download
memory/2804-10-0x00007FFC5E460000-0x00007FFC5EF22000-memory.dmp

Filesize
10.8MB

Download
memory/2804-11-0x000000001C9D0000-0x000000001CEF8000-memory.dmp

Filesize
5.2MB

Download
memory/3576-0-0x00007FFC5E463000-0x00007FFC5E465000-memory.dmp

Filesize
8KB

Download
memory/3576-1-0x0000000000390000-0x00000000006B4000-memory.dmp

Filesize
3.1MB

Download
memory/3576-2-0x00007FFC5E460000-0x00007FFC5EF22000-memory.dmp

Filesize
10.8MB

Download
memory/3576-5-0x00007FFC5E460000-0x00007FFC5EF22000-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