quasar | bc9d7ab160ae768a0d7cddd828e23c7d97dacae1f0adf71f86f3157931c2575c

Analysis

max time kernel
143s
max time network
150s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
04/11/2024, 05:07

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

0e3a741ba36201716079c915282ce457
SHA1

0b46da777889b26338525adcc5f1a0fc2c1f27e3
SHA256

bc9d7ab160ae768a0d7cddd828e23c7d97dacae1f0adf71f86f3157931c2575c
SHA512

1beeb0fe665b0a236a142132f47d2d248f2b825d9e600e8d9a3ad5f3691aa982a93dc7828c4b06ee84e7fe40b6447c79da887f98e200304a04ef1f103ff7237c
SSDEEP

49152:bv2I22SsaNYfdPBldt698dBcjHkhCmYmzUloGdYITHHB72eh2NT:bvb22SsaNYfdPBldt6+dBcjHkhCmA

Score

10^/10

quasar víctima spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Víctima

crismulticuenta-30512.portmap.host:30512

Mutex

d7480f6f-e85f-4b68-8813-8279e2e6cb96

Attributes

encryption_key
8497DDBEB7064872EF356A0D1A58DE488578E1E0
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Updater
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/4292-1-0x0000000000590000-0x00000000008B4000-memory.dmp	family_quasar
behavioral1/files/0x0028000000045053-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4512	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
3112	schtasks.exe
868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4512	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4292	Client-built.exe
Token: SeDebugPrivilege	4512	Client.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
4512	Client.exe
4512	Client.exe
4512	Client.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4512	Client.exe
4512	Client.exe
4512	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 3112	4292	Client-built.exe	83
PID 4292 wrote to memory of 3112	4292	Client-built.exe	83
PID 4292 wrote to memory of 4512	4292	Client-built.exe	85
PID 4292 wrote to memory of 4512	4292	Client-built.exe	85
PID 4512 wrote to memory of 868	4512	Client.exe	86
PID 4512 wrote to memory of 868	4512	Client.exe	86

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3112
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:868

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
0e3a741ba36201716079c915282ce457

SHA1
0b46da777889b26338525adcc5f1a0fc2c1f27e3

SHA256
bc9d7ab160ae768a0d7cddd828e23c7d97dacae1f0adf71f86f3157931c2575c

SHA512
1beeb0fe665b0a236a142132f47d2d248f2b825d9e600e8d9a3ad5f3691aa982a93dc7828c4b06ee84e7fe40b6447c79da887f98e200304a04ef1f103ff7237c

Download Submit
memory/4292-6-0x00007FF8C2610000-0x00007FF8C30D2000-memory.dmp

Filesize
10.8MB

Download
memory/4292-1-0x0000000000590000-0x00000000008B4000-memory.dmp

Filesize
3.1MB

Download
memory/4292-2-0x00007FF8C2610000-0x00007FF8C30D2000-memory.dmp

Filesize
10.8MB

Download
memory/4292-0-0x00007FF8C2613000-0x00007FF8C2615000-memory.dmp

Filesize
8KB

Download
memory/4512-7-0x00007FF8C2610000-0x00007FF8C30D2000-memory.dmp

Filesize
10.8MB

Download
memory/4512-5-0x00007FF8C2610000-0x00007FF8C30D2000-memory.dmp

Filesize
10.8MB

Download
memory/4512-8-0x000000001C660000-0x000000001C6B0000-memory.dmp

Filesize
320KB

Download
memory/4512-9-0x000000001C770000-0x000000001C822000-memory.dmp

Filesize
712KB

Download
memory/4512-12-0x000000001C6B0000-0x000000001C6C2000-memory.dmp

Filesize
72KB

Download
memory/4512-13-0x000000001C710000-0x000000001C74C000-memory.dmp

Filesize
240KB

Download
memory/4512-14-0x00007FF8C2610000-0x00007FF8C30D2000-memory.dmp

Filesize
10.8MB

Download
memory/4512-15-0x000000001D070000-0x000000001D16F000-memory.dmp

Filesize
1020KB

Download
memory/4512-16-0x00007FF8C2610000-0x00007FF8C30D2000-memory.dmp

Filesize
10.8MB

Download