quasar | 31ed17172ea2671002cc33bf0c07fbb3ceb5ebb416fd4bcee42719135a350e85

Analysis

max time kernel
18s
max time network
20s
platform
windows11-21h2_x64
resource
win11-20250313-en
resource tags

arch:x64arch:x86image:win11-20250313-enlocale:en-usos:windows11-21h2-x64system
submitted
27/03/2025, 21:32

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General

Target

Oracle spoofer.exe
Size

3.1MB
MD5

e47d068fa84e2ff877753866ba4a5d9c
SHA1

48fd362187a67ad329ae5e746e3008c22ea18533
SHA256

31ed17172ea2671002cc33bf0c07fbb3ceb5ebb416fd4bcee42719135a350e85
SHA512

300bf313b46fae7d0f7a9a9b6f7f9e5639e1b697aea9744ea8a1bf575824c52ecf2371b1e3284bc1a498f06e195447ad29c00b961e2767f143819e166bf1301c
SSDEEP

49152:3v7I22SsaNYfdPBldt698dBcjHdORJ6ebR3LoGdsVmTHHB72eh2NT:3vE22SsaNYfdPBldt6+dBcjHdORJ6Y8

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

91.163.205.232:4782

Mutex

98f4b3ae-dba3-4988-8eaa-78cd6af41e17

Attributes

encryption_key
4AB43FE7E3CD8EE4B14A97A301476935A04E9384
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/124-1-0x0000000000680000-0x00000000009A4000-memory.dmp	family_quasar
behavioral1/files/0x001900000002b0e7-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3524	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
2584	schtasks.exe
3520	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	124	Oracle spoofer.exe
Token: SeDebugPrivilege	3524	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3524	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3524	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3524	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 124 wrote to memory of 3520	124	Oracle spoofer.exe	82
PID 124 wrote to memory of 3520	124	Oracle spoofer.exe	82
PID 124 wrote to memory of 3524	124	Oracle spoofer.exe	84
PID 124 wrote to memory of 3524	124	Oracle spoofer.exe	84
PID 3524 wrote to memory of 2584	3524	Client.exe	85
PID 3524 wrote to memory of 2584	3524	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\Oracle spoofer.exe
"C:\Users\Admin\AppData\Local\Temp\Oracle spoofer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:124
- 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:3520
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3524
- - 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:2584

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

System Information Discovery

T1082

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
e47d068fa84e2ff877753866ba4a5d9c

SHA1
48fd362187a67ad329ae5e746e3008c22ea18533

SHA256
31ed17172ea2671002cc33bf0c07fbb3ceb5ebb416fd4bcee42719135a350e85

SHA512
300bf313b46fae7d0f7a9a9b6f7f9e5639e1b697aea9744ea8a1bf575824c52ecf2371b1e3284bc1a498f06e195447ad29c00b961e2767f143819e166bf1301c

Download Submit
memory/124-0-0x00007FFB62613000-0x00007FFB62615000-memory.dmp

Filesize
8KB

Download
memory/124-1-0x0000000000680000-0x00000000009A4000-memory.dmp

Filesize
3.1MB

Download
memory/124-2-0x00007FFB62610000-0x00007FFB630D2000-memory.dmp

Filesize
10.8MB

Download
memory/124-9-0x00007FFB62610000-0x00007FFB630D2000-memory.dmp

Filesize
10.8MB

Download
memory/3524-10-0x00007FFB62610000-0x00007FFB630D2000-memory.dmp

Filesize
10.8MB

Download
memory/3524-11-0x00007FFB62610000-0x00007FFB630D2000-memory.dmp

Filesize
10.8MB

Download
memory/3524-12-0x000000001BFC0000-0x000000001C010000-memory.dmp

Filesize
320KB

Download
memory/3524-13-0x000000001C0D0000-0x000000001C182000-memory.dmp

Filesize
712KB

Download
memory/3524-14-0x00007FFB62610000-0x00007FFB630D2000-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