quasar | 7f0fce9d1d75bff354d35566d4a0eedc0ee9104633fd859b3566cf9bfa2a711b

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-11-2024 18:15

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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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2388-1-0x00000000001D0000-0x00000000004F4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015d0e-6.dat	family_quasar
behavioral1/memory/3060-10-0x0000000001190000-0x00000000014B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
3060	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
2376	schtasks.exe
2924	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	2388	Client-built.exe
Token: SeDebugPrivilege	3060	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
3060	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Client-built.exeClient.exe

description	pid	Process	procid_target
PID 2388 wrote to memory of 2376	2388	Client-built.exe	30
PID 2388 wrote to memory of 2376	2388	Client-built.exe	30
PID 2388 wrote to memory of 2376	2388	Client-built.exe	30
PID 2388 wrote to memory of 3060	2388	Client-built.exe	32
PID 2388 wrote to memory of 3060	2388	Client-built.exe	32
PID 2388 wrote to memory of 3060	2388	Client-built.exe	32
PID 3060 wrote to memory of 2924	3060	Client.exe	33
PID 3060 wrote to memory of 2924	3060	Client.exe	33
PID 3060 wrote to memory of 2924	3060	Client.exe	33

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:2388
- 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:2376
- 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:3060
- - 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:2924

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
20f05826273f12162fa4c07fd0c522ab

SHA1
eb45020a2a4a44128aa5805b34801ad4ae45cdc0

SHA256
7f0fce9d1d75bff354d35566d4a0eedc0ee9104633fd859b3566cf9bfa2a711b

SHA512
25c567a345f3fbcf0e18003d1d53cb34f3e7a7c37c628f0f4b2093a04b78c5fec994032e37b1bc1358bd0ba8beff221458e2ff0cdbe431560dfb2d60aac0c636

Download Submit
memory/2388-0-0x000007FEF55A3000-0x000007FEF55A4000-memory.dmp

Filesize
4KB

Download
memory/2388-1-0x00000000001D0000-0x00000000004F4000-memory.dmp

Filesize
3.1MB

Download
memory/2388-2-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-8-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-9-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-10-0x0000000001190000-0x00000000014B4000-memory.dmp

Filesize
3.1MB

Download
memory/3060-11-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-12-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download