quasar | f58e7f0c990786066a2493513c11087fdd4680fb2053b9f52ec60d1d2dde6921

Analysis

max time kernel
126s
max time network
135s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
09-12-2024 02:45

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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 3 IoCs

resource	yara_rule
behavioral1/memory/1668-1-0x00000000000F0000-0x0000000000414000-memory.dmp	family_quasar
behavioral1/files/0x000800000001876a-6.dat	family_quasar
behavioral1/memory/2564-9-0x00000000000E0000-0x0000000000404000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2564	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
792	schtasks.exe
1780	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	Client-built.exe
Token: SeDebugPrivilege	2564	shot.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2564	shot.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 792	1668	Client-built.exe	31
PID 1668 wrote to memory of 792	1668	Client-built.exe	31
PID 1668 wrote to memory of 792	1668	Client-built.exe	31
PID 1668 wrote to memory of 2564	1668	Client-built.exe	33
PID 1668 wrote to memory of 2564	1668	Client-built.exe	33
PID 1668 wrote to memory of 2564	1668	Client-built.exe	33
PID 2564 wrote to memory of 1780	2564	shot.exe	34
PID 2564 wrote to memory of 1780	2564	shot.exe	34
PID 2564 wrote to memory of 1780	2564	shot.exe	34

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:1668
- 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:792
- 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:2564
- - 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:1780

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\shot.exe

Filesize
3.1MB

MD5
87fc10d30af8b4a98378dd9acc263a0d

SHA1
c52b9efa351750c2118fea4445af84548700c7f0

SHA256
f58e7f0c990786066a2493513c11087fdd4680fb2053b9f52ec60d1d2dde6921

SHA512
3b1deda5b20bfee5a14a886ca149da4248e01f7e06ff81cb8e886ba85b654fa47af44a82b9406df5fc13190a035245fa723c7f884c088dff3de781d5acb1f2d7

Download Submit
memory/1668-0-0x000007FEF51C3000-0x000007FEF51C4000-memory.dmp

Filesize
4KB

Download
memory/1668-1-0x00000000000F0000-0x0000000000414000-memory.dmp

Filesize
3.1MB

Download
memory/1668-2-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/1668-10-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2564-8-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2564-11-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2564-9-0x00000000000E0000-0x0000000000404000-memory.dmp

Filesize
3.1MB

Download
memory/2564-12-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads