quasar | c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09

Analysis

max time kernel
148s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
15-11-2024 12:17

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General

Target

MODEST MENU.exe
Size

3.1MB
MD5

dbe6648163a38bf88d16cd46cba60725
SHA1

8e6456d6eb5a41be657e00e652685c6441e2ab9c
SHA256

c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09
SHA512

81629676796e90b62ef26013318e1969148b7cf5e1e4cfe5456a84fa775f40b55fe7bb8ce47157beb91ecc6595f9128296c94cc05c4f2f77e508b6b0f014829f
SSDEEP

49152:GvyI22SsaNYfdPBldt698dBcjHTUaEEak2k/mF6oGdwGTHHB72eh2NT:Gvf22SsaNYfdPBldt6+dBcjHTUamEg

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.29.147:4782

Mutex

7b6a0219-487d-4153-aef3-d8965465527b

Attributes

encryption_key
C56BB8ACD2D4627CA39E0620C2CCEBAD8A4F4FF8
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/1360-1-0x0000000000780000-0x0000000000AA4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb2-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
3024	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
3316	schtasks.exe
4964	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

MODEST MENU.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	1360	MODEST MENU.exe
Token: SeDebugPrivilege	3024	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
3024	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

MODEST MENU.exeClient.exe

description	pid	Process	procid_target
PID 1360 wrote to memory of 4964	1360	MODEST MENU.exe	83
PID 1360 wrote to memory of 4964	1360	MODEST MENU.exe	83
PID 1360 wrote to memory of 3024	1360	MODEST MENU.exe	86
PID 1360 wrote to memory of 3024	1360	MODEST MENU.exe	86
PID 3024 wrote to memory of 3316	3024	Client.exe	89
PID 3024 wrote to memory of 3316	3024	Client.exe	89

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\MODEST MENU.exe
"C:\Users\Admin\AppData\Local\Temp\MODEST MENU.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1360
- 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:4964
- 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:3024
- - 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:3316

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
dbe6648163a38bf88d16cd46cba60725

SHA1
8e6456d6eb5a41be657e00e652685c6441e2ab9c

SHA256
c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09

SHA512
81629676796e90b62ef26013318e1969148b7cf5e1e4cfe5456a84fa775f40b55fe7bb8ce47157beb91ecc6595f9128296c94cc05c4f2f77e508b6b0f014829f

Download Submit
memory/1360-0-0x00007FFD9D8C3000-0x00007FFD9D8C5000-memory.dmp

Filesize
8KB

Download
memory/1360-1-0x0000000000780000-0x0000000000AA4000-memory.dmp

Filesize
3.1MB

Download
memory/1360-2-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/1360-10-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/3024-9-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/3024-11-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/3024-12-0x0000000002EC0000-0x0000000002F10000-memory.dmp

Filesize
320KB

Download
memory/3024-13-0x000000001C370000-0x000000001C422000-memory.dmp

Filesize
712KB

Download
memory/3024-14-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download