quasar | a3c253b9f12724dd49f22f7e2f111a6a0e4287720aeacb27bd82972340bafbd5

Analysis

max time kernel
17s
max time network
13s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-01-2025 03:11

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General

Target

Spoofer.exe
Size

3.1MB
MD5

eeb9030f12d05fe972d17b4c8f1e4d81
SHA1

08d59c0a50e25ef04bc1e4aa679e142ff1404f60
SHA256

a3c253b9f12724dd49f22f7e2f111a6a0e4287720aeacb27bd82972340bafbd5
SHA512

ed941abf3bfe4bbf684cb595dfb31b987c8416082e450b47936964b22edaee78e4b4e8a40fb8b45a87382d0e6b4f5b7cf7075e9e09eeb3cac7b29cb6e68299c9
SSDEEP

49152:/veI22SsaNYfdPBldt698dBcjHtyRJ6dbR3LoGdiiyTHHB72eh2NT:/vT22SsaNYfdPBldt6+dBcjHtyRJ6v

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.251:4782

Mutex

264addfa-0a06-4ba0-acee-229ad6bbba67

Attributes

encryption_key
75E2416D3C71CA793E6D1DD93AC978C2967ABC7A
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java updater.exe
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/4868-1-0x00000000009E0000-0x0000000000D04000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b64-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3760	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
5052	schtasks.exe
4572	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4868	Spoofer.exe
Token: SeDebugPrivilege	3760	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3760	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3760	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3760	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4868 wrote to memory of 5052	4868	Spoofer.exe	84
PID 4868 wrote to memory of 5052	4868	Spoofer.exe	84
PID 4868 wrote to memory of 3760	4868	Spoofer.exe	86
PID 4868 wrote to memory of 3760	4868	Spoofer.exe	86
PID 3760 wrote to memory of 4572	3760	Client.exe	90
PID 3760 wrote to memory of 4572	3760	Client.exe	90

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\Spoofer.exe
"C:\Users\Admin\AppData\Local\Temp\Spoofer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4868
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Java updater.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5052
- 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:3760
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Java updater.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4572

C:\Windows\system32\notepad.exe
"C:\Windows\system32\notepad.exe"
1⤵
PID:1384

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
eeb9030f12d05fe972d17b4c8f1e4d81

SHA1
08d59c0a50e25ef04bc1e4aa679e142ff1404f60

SHA256
a3c253b9f12724dd49f22f7e2f111a6a0e4287720aeacb27bd82972340bafbd5

SHA512
ed941abf3bfe4bbf684cb595dfb31b987c8416082e450b47936964b22edaee78e4b4e8a40fb8b45a87382d0e6b4f5b7cf7075e9e09eeb3cac7b29cb6e68299c9

Download Submit
memory/3760-9-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/3760-10-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/3760-11-0x000000001C050000-0x000000001C0A0000-memory.dmp

Filesize
320KB

Download
memory/3760-12-0x000000001C160000-0x000000001C212000-memory.dmp

Filesize
712KB

Download
memory/3760-13-0x000000001C950000-0x000000001CE78000-memory.dmp

Filesize
5.2MB

Download
memory/3760-14-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/3760-15-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/4868-0-0x00007FFAC9043000-0x00007FFAC9045000-memory.dmp

Filesize
8KB

Download
memory/4868-1-0x00000000009E0000-0x0000000000D04000-memory.dmp

Filesize
3.1MB

Download
memory/4868-2-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/4868-8-0x00007FFAC9040000-0x00007FFAC9B01000-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