quasar | 0502a8da4a9f46a7375766b83d181aa9f38e9969b10801f80736a3598410a281

Analysis

max time kernel
142s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
05-02-2025 09:40

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General

Target

filfin1.exe
Size

3.1MB
MD5

766e053d13e4f6750e8f694efb00fad0
SHA1

2a0e1ca7711795dfe50231d03ab7d0349014df5e
SHA256

0502a8da4a9f46a7375766b83d181aa9f38e9969b10801f80736a3598410a281
SHA512

3de1970fc083d404a28827f25e0ff4f096d6b75a2c2367bff0476857f5e217da3f6c40f531c2b835b31233bde53bc51086c6784985294e97ce21523bbef2bd7f
SSDEEP

49152:jvyt62XlaSFNWPjljiFa2RoUYIMcOhyvJo3oGdFTHHB72eh2NT:jva62XlaSFNWPjljiFXRoUYIWhR

Score

10^/10

quasar githubyt spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

githubyt

87.228.57.81:4782

Mutex

cf3988ab-2fd9-4544-a16f-9faa71eb5bac

Attributes

encryption_key
19A0FAF8459F69650B5965C225752D425C429EEC
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svchoost.exe
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/1288-1-0x00000000002A0000-0x00000000005C4000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b47-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1040	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
5060	schtasks.exe
2528	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1288	filfin1.exe
Token: SeDebugPrivilege	1040	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1040	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 5060	1288	filfin1.exe	86
PID 1288 wrote to memory of 5060	1288	filfin1.exe	86
PID 1288 wrote to memory of 1040	1288	filfin1.exe	88
PID 1288 wrote to memory of 1040	1288	filfin1.exe	88
PID 1040 wrote to memory of 2528	1040	Client.exe	89
PID 1040 wrote to memory of 2528	1040	Client.exe	89

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\filfin1.exe
"C:\Users\Admin\AppData\Local\Temp\filfin1.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svchoost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5060
- 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:1040
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svchoost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2528

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
766e053d13e4f6750e8f694efb00fad0

SHA1
2a0e1ca7711795dfe50231d03ab7d0349014df5e

SHA256
0502a8da4a9f46a7375766b83d181aa9f38e9969b10801f80736a3598410a281

SHA512
3de1970fc083d404a28827f25e0ff4f096d6b75a2c2367bff0476857f5e217da3f6c40f531c2b835b31233bde53bc51086c6784985294e97ce21523bbef2bd7f

Download Submit
memory/1040-9-0x00007FFBA4A80000-0x00007FFBA5541000-memory.dmp

Filesize
10.8MB

Download
memory/1040-11-0x00007FFBA4A80000-0x00007FFBA5541000-memory.dmp

Filesize
10.8MB

Download
memory/1040-12-0x00000000030F0000-0x0000000003140000-memory.dmp

Filesize
320KB

Download
memory/1040-13-0x000000001C220000-0x000000001C2D2000-memory.dmp

Filesize
712KB

Download
memory/1040-14-0x00007FFBA4A80000-0x00007FFBA5541000-memory.dmp

Filesize
10.8MB

Download
memory/1288-0-0x00007FFBA4A83000-0x00007FFBA4A85000-memory.dmp

Filesize
8KB

Download
memory/1288-1-0x00000000002A0000-0x00000000005C4000-memory.dmp

Filesize
3.1MB

Download
memory/1288-2-0x00007FFBA4A80000-0x00007FFBA5541000-memory.dmp

Filesize
10.8MB

Download
memory/1288-10-0x00007FFBA4A80000-0x00007FFBA5541000-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