quasar | 3864d360423959f1c229abd6db2a8b94c197910296c20661c4736102a388112f

Resubmissions

17-01-2025 17:18

250117-vvaf1ayjcm 10

14-01-2025 16:41

250114-t7d5aavpck 10

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-01-2025 16:41

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General

Target

voidware_loader.exe
Size

3.1MB
MD5

d0d7ab7998eee34f17c5299b2e5369d8
SHA1

6c1d3438adeb0b7f21be3c881be8fbee01b4e4f4
SHA256

3864d360423959f1c229abd6db2a8b94c197910296c20661c4736102a388112f
SHA512

fcec45df80bbe966817e468d3a4b56fb5d67d3472bc60f49cc25e86099b91f566ed1627e4f33b1ee037726e431af11c267bdd6d22518daf4489b6272f0d29304
SSDEEP

49152:SvnI22SsaNYfdPBldt698dBcjHp2RJ6EbR3LoGdQRZTHHB72eh2NT:SvI22SsaNYfdPBldt6+dBcjHp2RJ6O

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

other-little.gl.at.ply.gg:11758

Mutex

fbbc34bd-7320-405e-aebb-d4c666ee475f

Attributes

encryption_key
FEA99DED4EFE826DE2850621FD7919E62525FD26
install_name
DirectX111.exe
log_directory
Logs
reconnect_delay
3000
startup_key
DirectX
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2136-1-0x00000000008B0000-0x0000000000BD4000-memory.dmp	family_quasar
behavioral1/files/0x000800000001743a-6.dat	family_quasar
behavioral1/memory/1360-9-0x0000000000050000-0x0000000000374000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1360	DirectX111.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
2740	schtasks.exe
1340	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2136	voidware_loader.exe
Token: SeDebugPrivilege	1360	DirectX111.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 1340	2136	voidware_loader.exe	30
PID 2136 wrote to memory of 1340	2136	voidware_loader.exe	30
PID 2136 wrote to memory of 1340	2136	voidware_loader.exe	30
PID 2136 wrote to memory of 1360	2136	voidware_loader.exe	32
PID 2136 wrote to memory of 1360	2136	voidware_loader.exe	32
PID 2136 wrote to memory of 1360	2136	voidware_loader.exe	32
PID 1360 wrote to memory of 2740	1360	DirectX111.exe	33
PID 1360 wrote to memory of 2740	1360	DirectX111.exe	33
PID 1360 wrote to memory of 2740	1360	DirectX111.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\voidware_loader.exe
"C:\Users\Admin\AppData\Local\Temp\voidware_loader.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "DirectX" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\DirectX111.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1340
- C:\Users\Admin\AppData\Roaming\SubDir\DirectX111.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\DirectX111.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1360
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "DirectX" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\DirectX111.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2740

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\DirectX111.exe

Filesize
3.1MB

MD5
d0d7ab7998eee34f17c5299b2e5369d8

SHA1
6c1d3438adeb0b7f21be3c881be8fbee01b4e4f4

SHA256
3864d360423959f1c229abd6db2a8b94c197910296c20661c4736102a388112f

SHA512
fcec45df80bbe966817e468d3a4b56fb5d67d3472bc60f49cc25e86099b91f566ed1627e4f33b1ee037726e431af11c267bdd6d22518daf4489b6272f0d29304

Download Submit
memory/1360-10-0x000007FEF5AA0000-0x000007FEF648C000-memory.dmp

Filesize
9.9MB

Download
memory/1360-9-0x0000000000050000-0x0000000000374000-memory.dmp

Filesize
3.1MB

Download
memory/1360-11-0x000007FEF5AA0000-0x000007FEF648C000-memory.dmp

Filesize
9.9MB

Download
memory/1360-12-0x000007FEF5AA0000-0x000007FEF648C000-memory.dmp

Filesize
9.9MB

Download
memory/2136-0-0x000007FEF5AA3000-0x000007FEF5AA4000-memory.dmp

Filesize
4KB

Download
memory/2136-1-0x00000000008B0000-0x0000000000BD4000-memory.dmp

Filesize
3.1MB

Download
memory/2136-2-0x000007FEF5AA0000-0x000007FEF648C000-memory.dmp

Filesize
9.9MB

Download
memory/2136-8-0x000007FEF5AA0000-0x000007FEF648C000-memory.dmp

Filesize
9.9MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads