quasar | eaa4c2ef6a75906268f1ab8747ac150393f6487b0f6f57572536925481e00a73

Analysis

max time kernel
150s
max time network
147s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
11/01/2025, 22:19

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

7d9c6de47c31429b7cf08f07627add9f
SHA1

956c88efb80cd32f927bb9b5b25cfc9003b3dffa
SHA256

eaa4c2ef6a75906268f1ab8747ac150393f6487b0f6f57572536925481e00a73
SHA512

6ed87cde8eef630d9262817a6cab8c8af5163a12cef18dc21a5717386861c611f9e393a7993750dda128284bf1d1ffc1b4748a6e1f1d3569d4fbea877e23e12e
SSDEEP

49152:uviI22SsaNYfdPBldt698dBcjH4Ge2EGHBk/uV+oGdJTTHHB72eh2NT:uvv22SsaNYfdPBldt6+dBcjH4GewI

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

193.161.193.99:1194

Mutex

971d5aa2-233d-46c4-98c1-1812990742ad

Attributes

encryption_key
151D6A9E126EFB6E3B926F9127D87D6BF4A4C605
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
SecurityHealthSystray.exe
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/2380-1-0x00000000012A0000-0x00000000015C4000-memory.dmp	family_quasar

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2840	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	Client-built.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2380	Client-built.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2380	Client-built.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2840	2380	Client-built.exe	30
PID 2380 wrote to memory of 2840	2380	Client-built.exe	30
PID 2380 wrote to memory of 2840	2380	Client-built.exe	30

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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "SecurityHealthSystray.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2840

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2380-0-0x000007FEF6003000-0x000007FEF6004000-memory.dmp

Filesize
4KB

Download
memory/2380-1-0x00000000012A0000-0x00000000015C4000-memory.dmp

Filesize
3.1MB

Download
memory/2380-2-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download
memory/2380-3-0x000007FEF6003000-0x000007FEF6004000-memory.dmp

Filesize
4KB

Download
memory/2380-4-0x000007FEF6000000-0x000007FEF69EC000-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