quasar | f58e7f0c990786066a2493513c11087fdd4680fb2053b9f52ec60d1d2dde6921

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-12-2024 02:45

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General

Target

Client-built.exe
Size

3.1MB
MD5

87fc10d30af8b4a98378dd9acc263a0d
SHA1

c52b9efa351750c2118fea4445af84548700c7f0
SHA256

f58e7f0c990786066a2493513c11087fdd4680fb2053b9f52ec60d1d2dde6921
SHA512

3b1deda5b20bfee5a14a886ca149da4248e01f7e06ff81cb8e886ba85b654fa47af44a82b9406df5fc13190a035245fa723c7f884c088dff3de781d5acb1f2d7
SSDEEP

49152:CvyI22SsaNYfdPBldt698dBcjHyq4a95bQZk/xLoGdpeTHHB72eh2NT:Cvf22SsaNYfdPBldt6+dBcjHYazZ

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.0.0.132:4782

Mutex

0d8449ad-bc65-4692-bc2e-440d227260cb

Attributes

encryption_key
2070844D17065869428344B78D6D5F7002ED90BD
install_name
shot.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

resource	yara_rule
behavioral2/memory/1388-1-0x00000000004F0000-0x0000000000814000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b85-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2952	shot.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
4904	schtasks.exe
4836	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1388	Client-built.exe
Token: SeDebugPrivilege	2952	shot.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2952	shot.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 4904	1388	Client-built.exe	83
PID 1388 wrote to memory of 4904	1388	Client-built.exe	83
PID 1388 wrote to memory of 2952	1388	Client-built.exe	85
PID 1388 wrote to memory of 2952	1388	Client-built.exe	85
PID 2952 wrote to memory of 4836	2952	shot.exe	86
PID 2952 wrote to memory of 4836	2952	shot.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\shot.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4904
- C:\Users\Admin\AppData\Roaming\SubDir\shot.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\shot.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2952
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\shot.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4836

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\shot.exe

Filesize
3.1MB

MD5
87fc10d30af8b4a98378dd9acc263a0d

SHA1
c52b9efa351750c2118fea4445af84548700c7f0

SHA256
f58e7f0c990786066a2493513c11087fdd4680fb2053b9f52ec60d1d2dde6921

SHA512
3b1deda5b20bfee5a14a886ca149da4248e01f7e06ff81cb8e886ba85b654fa47af44a82b9406df5fc13190a035245fa723c7f884c088dff3de781d5acb1f2d7

Download Submit
memory/1388-0-0x00007FFB5E6D3000-0x00007FFB5E6D5000-memory.dmp

Filesize
8KB

Download
memory/1388-1-0x00000000004F0000-0x0000000000814000-memory.dmp

Filesize
3.1MB

Download
memory/1388-2-0x00007FFB5E6D0000-0x00007FFB5F191000-memory.dmp

Filesize
10.8MB

Download
memory/1388-9-0x00007FFB5E6D0000-0x00007FFB5F191000-memory.dmp

Filesize
10.8MB

Download
memory/2952-10-0x00007FFB5E6D0000-0x00007FFB5F191000-memory.dmp

Filesize
10.8MB

Download
memory/2952-11-0x00007FFB5E6D0000-0x00007FFB5F191000-memory.dmp

Filesize
10.8MB

Download
memory/2952-12-0x000000001CF70000-0x000000001CFC0000-memory.dmp

Filesize
320KB

Download
memory/2952-13-0x000000001D080000-0x000000001D132000-memory.dmp

Filesize
712KB

Download
memory/2952-14-0x00007FFB5E6D0000-0x00007FFB5F191000-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