quasar | 6f53594dbef2a88901782608ddfde6508429b8836eb9895ac2fef53cd014cd53

Analysis

max time kernel
33s
max time network
37s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-01-2025 23:56

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General

Target

Testing.exe
Size

3.1MB
MD5

db959977d9acce58e61aa4ef12821dce
SHA1

7e50e26cef4f9a717401d84d8550958bb074ba76
SHA256

21938faab3c33d56e889851cb0f81046154d14be56847374948879b6a19fb4a7
SHA512

f52ac84c3eddf50deed156fcfa291dde981c4179aea1b72984791332389d8add9b68d541a47bfdc3632fdf745d6f0e1465c74187a9057ee5cb570a63e2b7955f
SSDEEP

49152:WvtG42pda6D+/PjlLOlg6yQipVG8azxEhKvJqFoGdlTHHB72eh2NT:WvE42pda6D+/PjlLOlZyQipVVhr

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.40.122:4782

rayanneaa-47070.portmap.host:47070

Mutex

f1780d6b-a6ee-4632-9816-f23bb146f81e

Attributes

encryption_key
F38746D956F52C2D74C5EA46908D0B22D4BB8A0C
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

resource	yara_rule
behavioral4/memory/3620-1-0x0000000000B40000-0x0000000000E64000-memory.dmp	family_quasar
behavioral4/files/0x0007000000023c8c-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
68	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
5072	schtasks.exe
952	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3620	Testing.exe
Token: SeDebugPrivilege	68	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
68	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3620 wrote to memory of 5072	3620	Testing.exe	82
PID 3620 wrote to memory of 5072	3620	Testing.exe	82
PID 3620 wrote to memory of 68	3620	Testing.exe	84
PID 3620 wrote to memory of 68	3620	Testing.exe	84
PID 68 wrote to memory of 952	68	Client.exe	85
PID 68 wrote to memory of 952	68	Client.exe	85

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\Testing.exe
"C:\Users\Admin\AppData\Local\Temp\Testing.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3620
- 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:5072
- 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:68
- - 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:952

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
db959977d9acce58e61aa4ef12821dce

SHA1
7e50e26cef4f9a717401d84d8550958bb074ba76

SHA256
21938faab3c33d56e889851cb0f81046154d14be56847374948879b6a19fb4a7

SHA512
f52ac84c3eddf50deed156fcfa291dde981c4179aea1b72984791332389d8add9b68d541a47bfdc3632fdf745d6f0e1465c74187a9057ee5cb570a63e2b7955f

Download Submit
memory/68-10-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/68-11-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/68-12-0x000000001D540000-0x000000001D590000-memory.dmp

Filesize
320KB

Download
memory/68-13-0x000000001D650000-0x000000001D702000-memory.dmp

Filesize
712KB

Download
memory/68-14-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/3620-0-0x00007FFCC6063000-0x00007FFCC6065000-memory.dmp

Filesize
8KB

Download
memory/3620-1-0x0000000000B40000-0x0000000000E64000-memory.dmp

Filesize
3.1MB

Download
memory/3620-2-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/3620-9-0x00007FFCC6060000-0x00007FFCC6B21000-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