quasar | e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

Analysis

max time kernel
127s
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
16-12-2024 06:28

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General

Target

discord.exe
Size

3.1MB
MD5

6a0bb84dcd837e83638f4292180bf5ab
SHA1

20e31ccffe1ac806e75ea839ea90b4c91e4322c5
SHA256

e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4
SHA512

d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5
SSDEEP

49152:Ovkt62XlaSFNWPjljiFa2RoUYIUOzML6oGd4y/THHB72eh2NT:Ov462XlaSFNWPjljiFXRoUYIpzMG

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.43.241:4782

Mutex

0517af80-95f0-4a6d-a904-5b7ee8faa157

Attributes

encryption_key
6095BF6D5D58D02597F98370DFD1CCEB782F1EDD
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svhost
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/1344-1-0x00000000008B0000-0x0000000000BD4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb5-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3564	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
2092	schtasks.exe
2140	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1344	discord.exe
Token: SeDebugPrivilege	3564	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3564	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1344 wrote to memory of 2092	1344	discord.exe	83
PID 1344 wrote to memory of 2092	1344	discord.exe	83
PID 1344 wrote to memory of 3564	1344	discord.exe	85
PID 1344 wrote to memory of 3564	1344	discord.exe	85
PID 3564 wrote to memory of 2140	3564	Client.exe	86
PID 3564 wrote to memory of 2140	3564	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\discord.exe
"C:\Users\Admin\AppData\Local\Temp\discord.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1344
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2092
- 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:3564
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2140

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
6a0bb84dcd837e83638f4292180bf5ab

SHA1
20e31ccffe1ac806e75ea839ea90b4c91e4322c5

SHA256
e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

SHA512
d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5

Download Submit
memory/1344-0-0x00007FFBE9023000-0x00007FFBE9025000-memory.dmp

Filesize
8KB

Download
memory/1344-1-0x00000000008B0000-0x0000000000BD4000-memory.dmp

Filesize
3.1MB

Download
memory/1344-2-0x00007FFBE9020000-0x00007FFBE9AE1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-9-0x00007FFBE9020000-0x00007FFBE9AE1000-memory.dmp

Filesize
10.8MB

Download
memory/3564-10-0x00007FFBE9020000-0x00007FFBE9AE1000-memory.dmp

Filesize
10.8MB

Download
memory/3564-11-0x00007FFBE9020000-0x00007FFBE9AE1000-memory.dmp

Filesize
10.8MB

Download
memory/3564-12-0x000000001B940000-0x000000001B990000-memory.dmp

Filesize
320KB

Download
memory/3564-13-0x000000001BA50000-0x000000001BB02000-memory.dmp

Filesize
712KB

Download
memory/3564-14-0x00007FFBE9020000-0x00007FFBE9AE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads