quasar | a9f6b7b95c4c09e3ef7fa35cfd86c33e8938d0829e0e553449e7a38dd103820c

Analysis

max time kernel
18s
max time network
19s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
02-01-2025 20:40

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General

Target

McMoule.exe
Size

3.1MB
MD5

b68449a1a51b159035f48ea3034964e0
SHA1

eaa568400c2b8936815d95914329907492a91169
SHA256

a9f6b7b95c4c09e3ef7fa35cfd86c33e8938d0829e0e553449e7a38dd103820c
SHA512

54c118a301ef08f13350a9acf2724aa4d1e560af4a517f9cc8601933c5413164e3a23804fa0c4cf93d7874fed7858b9cdceabba4855428c6cc133f176e6e1ccd
SSDEEP

49152:hvnI22SsaNYfdPBldt698dBcjHUAxNESEFk/ifLoGdVOlTHHB72eh2NT:hvI22SsaNYfdPBldt6+dBcjH/xcj

Score

10^/10

quasar valouzz spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Valouzz

192.168.1.34:4782

Mutex

eb21c27a-76a8-4d9b-bf47-98f413c746f5

Attributes

encryption_key
4B5EEB0652E6BEA43CC995383C7934AFE315C272
install_name
reg32.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Updater System
subdirectory
Windows Updater

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/2848-1-0x0000000000C60000-0x0000000000F88000-memory.dmp	family_quasar
behavioral1/files/0x001a00000002ab31-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4596	reg32.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
3444	schtasks.exe
4188	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	McMoule.exe
Token: SeDebugPrivilege	4596	reg32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4596	reg32.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4596	reg32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4596	reg32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 3444	2848	McMoule.exe	77
PID 2848 wrote to memory of 3444	2848	McMoule.exe	77
PID 2848 wrote to memory of 4596	2848	McMoule.exe	79
PID 2848 wrote to memory of 4596	2848	McMoule.exe	79
PID 4596 wrote to memory of 4188	4596	reg32.exe	80
PID 4596 wrote to memory of 4188	4596	reg32.exe	80

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\McMoule.exe
"C:\Users\Admin\AppData\Local\Temp\McMoule.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Updater System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Updater\reg32.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3444
- C:\Users\Admin\AppData\Roaming\Windows Updater\reg32.exe
  "C:\Users\Admin\AppData\Roaming\Windows Updater\reg32.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:4596
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Updater System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Updater\reg32.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4188

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\Windows Updater\reg32.exe

Filesize
3.1MB

MD5
b68449a1a51b159035f48ea3034964e0

SHA1
eaa568400c2b8936815d95914329907492a91169

SHA256
a9f6b7b95c4c09e3ef7fa35cfd86c33e8938d0829e0e553449e7a38dd103820c

SHA512
54c118a301ef08f13350a9acf2724aa4d1e560af4a517f9cc8601933c5413164e3a23804fa0c4cf93d7874fed7858b9cdceabba4855428c6cc133f176e6e1ccd

Download Submit
memory/2848-0-0x00007FFB5DE53000-0x00007FFB5DE55000-memory.dmp

Filesize
8KB

Download
memory/2848-1-0x0000000000C60000-0x0000000000F88000-memory.dmp

Filesize
3.2MB

Download
memory/2848-2-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/2848-9-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4596-10-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4596-11-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4596-12-0x000000001C440000-0x000000001C490000-memory.dmp

Filesize
320KB

Download
memory/4596-13-0x000000001C550000-0x000000001C602000-memory.dmp

Filesize
712KB

Download
memory/4596-14-0x000000001CC40000-0x000000001D168000-memory.dmp

Filesize
5.2MB

Download
memory/4596-15-0x00007FFB5DE50000-0x00007FFB5E912000-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