quasar | 6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd

Analysis

max time kernel
135s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31/10/2024, 00:33

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General

Target

6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe
Size

3.1MB
MD5

8e2f41a8da48ee3bb6d533d7de12d621
SHA1

4b4f1bbfc8e8570668b55f1157791879fc272a6b
SHA256

6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd
SHA512

fb78fabf6e4b4e52b375f63b687ea6758efa05a7a1b67c2df5c18cdbb9382bb34f768d340cb8386432a8b52fc7893d807409dd4857c3f46cdec54bc5745224d0
SSDEEP

49152:CvyI22SsaNYfdPBldt698dBcjHmIxNESEHk/inLoGdxTHHB72eh2NT:Cvf22SsaNYfdPBldt6+dBcjHdxWL

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.116:4782

Mutex

7bcc4347-f38d-44cb-b66e-2a087c7e915f

Attributes

encryption_key
84ADCD6EA0C9BEC44FAF54AEA226EC9015B89296
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Services
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/2340-1-0x0000000000ED0000-0x00000000011F4000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b8d-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4836	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
2096	schtasks.exe
4088	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2340	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe
Token: SeDebugPrivilege	4836	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4836	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 2096	2340	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	87
PID 2340 wrote to memory of 2096	2340	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	87
PID 2340 wrote to memory of 4836	2340	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	89
PID 2340 wrote to memory of 4836	2340	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	89
PID 4836 wrote to memory of 4088	4836	Client.exe	90
PID 4836 wrote to memory of 4088	4836	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\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe
"C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Services" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2096
- 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:4836
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Services" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4088

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\Client.exe

Filesize
3.1MB

MD5
8e2f41a8da48ee3bb6d533d7de12d621

SHA1
4b4f1bbfc8e8570668b55f1157791879fc272a6b

SHA256
6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd

SHA512
fb78fabf6e4b4e52b375f63b687ea6758efa05a7a1b67c2df5c18cdbb9382bb34f768d340cb8386432a8b52fc7893d807409dd4857c3f46cdec54bc5745224d0

Download Submit
memory/2340-0-0x00007FFA8A943000-0x00007FFA8A945000-memory.dmp

Filesize
8KB

Download
memory/2340-1-0x0000000000ED0000-0x00000000011F4000-memory.dmp

Filesize
3.1MB

Download
memory/2340-2-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/2340-9-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/4836-10-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/4836-11-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/4836-12-0x000000001B6C0000-0x000000001B710000-memory.dmp

Filesize
320KB

Download
memory/4836-13-0x000000001C000000-0x000000001C0B2000-memory.dmp

Filesize
712KB

Download
memory/4836-14-0x00007FFA8A940000-0x00007FFA8B401000-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