quasar | fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67

Analysis

max time kernel
27s
max time network
28s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-01-2025 13:38

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General

Target

EZFN op cheats.exe
Size

3.1MB
MD5

ef4d8a6e9965bc6bb50cc1dfc5afde69
SHA1

22dc66b0dec9e655fc049063eb9ed1ac40163d63
SHA256

fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67
SHA512

681ee20aebd9e6c39004cf79c25a06c88f969ed2891dc46323314d9fedbe99799894deb88a4df3175f93787c37b5b2037050becf04280669b5499c649a25c9e9
SSDEEP

49152:+vIt62XlaSFNWPjljiFa2RoUYICH/aEfpKk/YFsoGdzbTHHB72eh2NT:+vE62XlaSFNWPjljiFXRoUYICH/umj

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.137.1:4782

Mutex

c9e46391-a513-481f-850c-0575d9434d9b

Attributes

encryption_key
08BB821083C178CF94367793848CD70209AA4A6C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
cheats
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/1728-1-0x0000000001010000-0x0000000001334000-memory.dmp	family_quasar
behavioral1/files/0x000700000001868b-5.dat	family_quasar
behavioral1/memory/1476-9-0x0000000000AA0000-0x0000000000DC4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1476	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
2232	schtasks.exe
3052	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	EZFN op cheats.exe
Token: SeDebugPrivilege	1476	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1476	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 3052	1728	EZFN op cheats.exe	31
PID 1728 wrote to memory of 3052	1728	EZFN op cheats.exe	31
PID 1728 wrote to memory of 3052	1728	EZFN op cheats.exe	31
PID 1728 wrote to memory of 1476	1728	EZFN op cheats.exe	33
PID 1728 wrote to memory of 1476	1728	EZFN op cheats.exe	33
PID 1728 wrote to memory of 1476	1728	EZFN op cheats.exe	33
PID 1476 wrote to memory of 2232	1476	Client.exe	34
PID 1476 wrote to memory of 2232	1476	Client.exe	34
PID 1476 wrote to memory of 2232	1476	Client.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\EZFN op cheats.exe
"C:\Users\Admin\AppData\Local\Temp\EZFN op cheats.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "cheats" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3052
- 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:1476
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "cheats" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2232

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
ef4d8a6e9965bc6bb50cc1dfc5afde69

SHA1
22dc66b0dec9e655fc049063eb9ed1ac40163d63

SHA256
fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67

SHA512
681ee20aebd9e6c39004cf79c25a06c88f969ed2891dc46323314d9fedbe99799894deb88a4df3175f93787c37b5b2037050becf04280669b5499c649a25c9e9

Download Submit
memory/1476-7-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download
memory/1476-9-0x0000000000AA0000-0x0000000000DC4000-memory.dmp

Filesize
3.1MB

Download
memory/1476-10-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download
memory/1476-11-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download
memory/1728-0-0x000007FEF5FD3000-0x000007FEF5FD4000-memory.dmp

Filesize
4KB

Download
memory/1728-1-0x0000000001010000-0x0000000001334000-memory.dmp

Filesize
3.1MB

Download
memory/1728-2-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download
memory/1728-8-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads