quasar | 9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18

Analysis

max time kernel
115s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-12-2024 02:56

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General

Target

9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.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
behavioral2/memory/1488-1-0x00000000005A0000-0x00000000008C4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c67-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
116	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
2996	schtasks.exe
628	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1488	9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.exe
Token: SeDebugPrivilege	116	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
116	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1488 wrote to memory of 2996	1488	9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.exe	84
PID 1488 wrote to memory of 2996	1488	9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.exe	84
PID 1488 wrote to memory of 116	1488	9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.exe	86
PID 1488 wrote to memory of 116	1488	9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.exe	86
PID 116 wrote to memory of 628	116	Client.exe	87
PID 116 wrote to memory of 628	116	Client.exe	87

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\9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.exe
"C:\Users\Admin\AppData\Local\Temp\9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18N.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488
- 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:2996
- 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:116
- - 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:628

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
19570d471b4f795bf854b8f8951d28f0

SHA1
9d43a2c713ca6d8d7ecf2b9546b24add96612994

SHA256
9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18

SHA512
f3f059d81f29f3e3607f9837be54226a5a82f83d64c812b01b6a3200abc3e3a41360a931dfe143c07359df5bb07bcb5dc695882a715ccf635c3ab5a54bb59298

Download Submit
memory/116-10-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/116-11-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/116-12-0x000000001C4E0000-0x000000001C530000-memory.dmp

Filesize
320KB

Download
memory/116-13-0x000000001C5F0000-0x000000001C6A2000-memory.dmp

Filesize
712KB

Download
memory/116-14-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/1488-0-0x00007FFD8D673000-0x00007FFD8D675000-memory.dmp

Filesize
8KB

Download
memory/1488-1-0x00000000005A0000-0x00000000008C4000-memory.dmp

Filesize
3.1MB

Download
memory/1488-2-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/1488-9-0x00007FFD8D670000-0x00007FFD8E131000-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