quasar | 712401528a5a7c45ae924bce9505e4e6bdb8ea4382c9c83ab8d29be7fc6f2784

Analysis

max time kernel
1027s
max time network
1053s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
06-11-2024 23:43

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General

Target

Se han detectado 34859 amenazas.exe
Size

3.1MB
MD5

b566a6a837a5ddf24e5f7fe9836de58e
SHA1

ea8991d3acebb5c6f7dec221cdff6ff3c06ea9ef
SHA256

712401528a5a7c45ae924bce9505e4e6bdb8ea4382c9c83ab8d29be7fc6f2784
SHA512

31090893431008e29edb82a79564ede4031d4d36a1c1c8404b8cda2e2826e9d9f952f5b637bceee5f4f56b1ed23c01f706d42e48fe162c01c56fe8d9ed6618e7
SSDEEP

49152:rvyI22SsaNYfdPBldt698dBcjHr9xNESEKk/iPLoGdxzTHHB72eh2NT:rvf22SsaNYfdPBldt6+dBcjHBxxT

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.9:4782

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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/5048-1-0x0000000000C90000-0x0000000000FB4000-memory.dmp	family_quasar
behavioral1/files/0x0028000000045087-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3992	Client.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
4436	schtasks.exe
1652	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5048	Se han detectado 34859 amenazas.exe
Token: SeDebugPrivilege	3992	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3992	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 4436	5048	Se han detectado 34859 amenazas.exe	81
PID 5048 wrote to memory of 4436	5048	Se han detectado 34859 amenazas.exe	81
PID 5048 wrote to memory of 3992	5048	Se han detectado 34859 amenazas.exe	83
PID 5048 wrote to memory of 3992	5048	Se han detectado 34859 amenazas.exe	83
PID 3992 wrote to memory of 1652	3992	Client.exe	86
PID 3992 wrote to memory of 1652	3992	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\Se han detectado 34859 amenazas.exe
"C:\Users\Admin\AppData\Local\Temp\Se han detectado 34859 amenazas.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5048
- 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:4436
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3992
- - 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:1652

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

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
b566a6a837a5ddf24e5f7fe9836de58e

SHA1
ea8991d3acebb5c6f7dec221cdff6ff3c06ea9ef

SHA256
712401528a5a7c45ae924bce9505e4e6bdb8ea4382c9c83ab8d29be7fc6f2784

SHA512
31090893431008e29edb82a79564ede4031d4d36a1c1c8404b8cda2e2826e9d9f952f5b637bceee5f4f56b1ed23c01f706d42e48fe162c01c56fe8d9ed6618e7

Download Submit
memory/3992-5-0x00007FFA34270000-0x00007FFA34D32000-memory.dmp

Filesize
10.8MB

Download
memory/3992-7-0x00007FFA34270000-0x00007FFA34D32000-memory.dmp

Filesize
10.8MB

Download
memory/3992-8-0x000000001BDC0000-0x000000001BE10000-memory.dmp

Filesize
320KB

Download
memory/3992-9-0x000000001CF40000-0x000000001CFF2000-memory.dmp

Filesize
712KB

Download
memory/3992-10-0x00007FFA34270000-0x00007FFA34D32000-memory.dmp

Filesize
10.8MB

Download
memory/3992-11-0x00007FFA34270000-0x00007FFA34D32000-memory.dmp

Filesize
10.8MB

Download
memory/5048-0-0x00007FFA34273000-0x00007FFA34275000-memory.dmp

Filesize
8KB

Download
memory/5048-1-0x0000000000C90000-0x0000000000FB4000-memory.dmp

Filesize
3.1MB

Download
memory/5048-2-0x00007FFA34270000-0x00007FFA34D32000-memory.dmp

Filesize
10.8MB

Download
memory/5048-6-0x00007FFA34270000-0x00007FFA34D32000-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