quasar | 6be1cae3cc032014e34c3a79e24aafd051639b807db79ea56d493d9203c2ac89

Resubmissions

30-10-2024 11:53

241030-n2cflstqfl 10

Analysis

max time kernel
127s
max time network
138s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2260-1-0x0000000000B10000-0x0000000000E34000-memory.dmp	family_quasar
behavioral1/files/0x0035000000016334-5.dat	family_quasar
behavioral1/memory/2852-8-0x0000000000380000-0x00000000006A4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
2852	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
2676	schtasks.exe
2872	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

TempWoofpriv.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	2260	TempWoofpriv.exe
Token: SeDebugPrivilege	2852	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2852	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

TempWoofpriv.exeClient.exe

description	pid	Process	procid_target
PID 2260 wrote to memory of 2676	2260	TempWoofpriv.exe	30
PID 2260 wrote to memory of 2676	2260	TempWoofpriv.exe	30
PID 2260 wrote to memory of 2676	2260	TempWoofpriv.exe	30
PID 2260 wrote to memory of 2852	2260	TempWoofpriv.exe	32
PID 2260 wrote to memory of 2852	2260	TempWoofpriv.exe	32
PID 2260 wrote to memory of 2852	2260	TempWoofpriv.exe	32
PID 2852 wrote to memory of 2872	2852	Client.exe	33
PID 2852 wrote to memory of 2872	2852	Client.exe	33
PID 2852 wrote to memory of 2872	2852	Client.exe	33

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:2260
- 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:2676
- 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:2852
- - 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:2872

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
b9aee7a92f002f80a6b04c252b05bb29

SHA1
4e186ba6d401d5e45627ac789d3cf22d19698b8c

SHA256
72f27c509e27de2edbe9d98fa9258624260d3cabd7b9932636dceb610180d7ef

SHA512
b3f899e279c6f72cb8517160b747bcd44339909b61a82e4304d1e29e9e5da9506acdde8531d25ed3a3506781743c74427437dcfc6981bc992fdb5d83652cb6cd

Download Submit
memory/2260-0-0x000007FEF6163000-0x000007FEF6164000-memory.dmp

Filesize
4KB

Download
memory/2260-1-0x0000000000B10000-0x0000000000E34000-memory.dmp

Filesize
3.1MB

Download
memory/2260-2-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2260-7-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2852-9-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2852-8-0x0000000000380000-0x00000000006A4000-memory.dmp

Filesize
3.1MB

Download
memory/2852-10-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2852-11-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download