quasar | 6be1cae3cc032014e34c3a79e24aafd051639b807db79ea56d493d9203c2ac89

Resubmissions

30-10-2024 11:53

241030-n2cflstqfl 10

Analysis

max time kernel
26s
max time network
23s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-10-2024 11:53

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General

Target

rezprivwoofer/TempWoofpriv.exe
Size

3.1MB
MD5

b9aee7a92f002f80a6b04c252b05bb29
SHA1

4e186ba6d401d5e45627ac789d3cf22d19698b8c
SHA256

72f27c509e27de2edbe9d98fa9258624260d3cabd7b9932636dceb610180d7ef
SHA512

b3f899e279c6f72cb8517160b747bcd44339909b61a82e4304d1e29e9e5da9506acdde8531d25ed3a3506781743c74427437dcfc6981bc992fdb5d83652cb6cd
SSDEEP

49152:6vWI22SsaNYfdPBldt698dBcjHRwn85kbRULoGdWiTHHB72eh2NT:6v722SsaNYfdPBldt6+dBcjHRwn85XG

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.28:4782

Mutex

d77230bf-9913-4330-a1f9-b2094453e604

Attributes

encryption_key
954674A032C3A24E1CEB078DEAC16D915B41486D
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

Processes:

resource	yara_rule
behavioral2/memory/1060-1-0x0000000000130000-0x0000000000454000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c8a-4.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
1868	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

Processes:

schtasks.exeschtasks.exe

pid	Process
1392	schtasks.exe
448	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

TempWoofpriv.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	1060	TempWoofpriv.exe
Token: SeDebugPrivilege	1868	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
1868	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

TempWoofpriv.exeClient.exe

description	pid	Process	procid_target
PID 1060 wrote to memory of 1392	1060	TempWoofpriv.exe	86
PID 1060 wrote to memory of 1392	1060	TempWoofpriv.exe	86
PID 1060 wrote to memory of 1868	1060	TempWoofpriv.exe	89
PID 1060 wrote to memory of 1868	1060	TempWoofpriv.exe	89
PID 1868 wrote to memory of 448	1868	Client.exe	95
PID 1868 wrote to memory of 448	1868	Client.exe	95

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\rezprivwoofer\TempWoofpriv.exe
"C:\Users\Admin\AppData\Local\Temp\rezprivwoofer\TempWoofpriv.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1060
- 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:1392
- 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:1868
- - 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:448

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
b9aee7a92f002f80a6b04c252b05bb29

SHA1
4e186ba6d401d5e45627ac789d3cf22d19698b8c

SHA256
72f27c509e27de2edbe9d98fa9258624260d3cabd7b9932636dceb610180d7ef

SHA512
b3f899e279c6f72cb8517160b747bcd44339909b61a82e4304d1e29e9e5da9506acdde8531d25ed3a3506781743c74427437dcfc6981bc992fdb5d83652cb6cd

Download Submit
memory/1060-0-0x00007FFFFDBF3000-0x00007FFFFDBF5000-memory.dmp

Filesize
8KB

Download
memory/1060-1-0x0000000000130000-0x0000000000454000-memory.dmp

Filesize
3.1MB

Download
memory/1060-2-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/1060-8-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/1868-9-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/1868-10-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/1868-11-0x000000001BC30000-0x000000001BC80000-memory.dmp

Filesize
320KB

Download
memory/1868-12-0x000000001C470000-0x000000001C522000-memory.dmp

Filesize
712KB

Download
memory/1868-13-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download