quasar | 9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2024 06:12

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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

Processes:

resource	yara_rule
behavioral2/memory/4440-1-0x0000000000CD0000-0x0000000000FF4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b78-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
3028	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
2072	schtasks.exe
4616	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Installer.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	4440	Installer.exe
Token: SeDebugPrivilege	3028	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
3028	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Installer.exeClient.exe

description	pid	Process	procid_target
PID 4440 wrote to memory of 2072	4440	Installer.exe	82
PID 4440 wrote to memory of 2072	4440	Installer.exe	82
PID 4440 wrote to memory of 3028	4440	Installer.exe	84
PID 4440 wrote to memory of 3028	4440	Installer.exe	84
PID 3028 wrote to memory of 4616	3028	Client.exe	85
PID 3028 wrote to memory of 4616	3028	Client.exe	85

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:4440
- 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:2072
- 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:3028
- - 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:4616

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
19570d471b4f795bf854b8f8951d28f0

SHA1
9d43a2c713ca6d8d7ecf2b9546b24add96612994

SHA256
9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18

SHA512
f3f059d81f29f3e3607f9837be54226a5a82f83d64c812b01b6a3200abc3e3a41360a931dfe143c07359df5bb07bcb5dc695882a715ccf635c3ab5a54bb59298

Download Submit
memory/3028-11-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

Filesize
10.8MB

Download
memory/3028-10-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

Filesize
10.8MB

Download
memory/3028-13-0x000000001BEE0000-0x000000001BF92000-memory.dmp

Filesize
712KB

Download
memory/3028-12-0x000000001B2F0000-0x000000001B340000-memory.dmp

Filesize
320KB

Download
memory/3028-16-0x000000001B3A0000-0x000000001B3B2000-memory.dmp

Filesize
72KB

Download
memory/3028-17-0x000000001BE60000-0x000000001BE9C000-memory.dmp

Filesize
240KB

Download
memory/3028-18-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

Filesize
10.8MB

Download
memory/3028-19-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

Filesize
10.8MB

Download
memory/4440-2-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

Filesize
10.8MB

Download
memory/4440-1-0x0000000000CD0000-0x0000000000FF4000-memory.dmp

Filesize
3.1MB

Download
memory/4440-9-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

Filesize
10.8MB

Download
memory/4440-0-0x00007FFF96933000-0x00007FFF96935000-memory.dmp

Filesize
8KB

Download