quasar | 8b227695aca3b38ba8c88ecaade8ef7cf197270b2f423b992cdce647308e586d

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
01/04/2025, 16:30

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General

Target

4R04Y_RuntimeBroker.exe
Size

3.1MB
MD5

613989e76e4428defcb477aa032ff26b
SHA1

11f3147ebd49c20bd957c6b1b0255ffe2382d24c
SHA256

8b227695aca3b38ba8c88ecaade8ef7cf197270b2f423b992cdce647308e586d
SHA512

8a6b3450fab0e4af69fe7f285cd507f25d65f3264e27f79e1de1c713383620e71a1dd60d47e041ae1b66961847551736fad92abe1af51865b47766e4c8d2eaf1
SSDEEP

49152:PvSe821/aQWl8P0lSk3aKA3Z+nvTw3uarXLoGdzTHHB72eh2NT:Pvp821/aQWl8P0lSk3DA3Z+nc3j

Score

10^/10

quasar virgen spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

VIRGEN

holefo2785-22820.portmap.host:22820

Mutex

c423e76a-260b-4d6a-90d7-cf71bdc4af8b

Attributes

encryption_key
14B98F14C8A2574E32B0396E72660E0C80B14AC2
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
1000
startup_key
Runtime Broker
subdirectory
migration

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/1824-1-0x0000000000630000-0x0000000000954000-memory.dmp	family_quasar
behavioral1/files/0x0009000000024255-4.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4652	RuntimeBroker.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\migration\RuntimeBroker.exe	4R04Y_RuntimeBroker.exe
File opened for modification	C:\Windows\system32\migration\RuntimeBroker.exe	4R04Y_RuntimeBroker.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
4400	schtasks.exe
4748	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1824	4R04Y_RuntimeBroker.exe
Token: SeDebugPrivilege	4652	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 4400	1824	4R04Y_RuntimeBroker.exe	88
PID 1824 wrote to memory of 4400	1824	4R04Y_RuntimeBroker.exe	88
PID 1824 wrote to memory of 4652	1824	4R04Y_RuntimeBroker.exe	90
PID 1824 wrote to memory of 4652	1824	4R04Y_RuntimeBroker.exe	90
PID 4652 wrote to memory of 4748	4652	RuntimeBroker.exe	94
PID 4652 wrote to memory of 4748	4652	RuntimeBroker.exe	94

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\4R04Y_RuntimeBroker.exe
"C:\Users\Admin\AppData\Local\Temp\4R04Y_RuntimeBroker.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\migration\RuntimeBroker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4400
- C:\Windows\system32\migration\RuntimeBroker.exe
  "C:\Windows\system32\migration\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4652
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\migration\RuntimeBroker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4748

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:\Windows\System32\migration\RuntimeBroker.exe

Filesize
3.1MB

MD5
613989e76e4428defcb477aa032ff26b

SHA1
11f3147ebd49c20bd957c6b1b0255ffe2382d24c

SHA256
8b227695aca3b38ba8c88ecaade8ef7cf197270b2f423b992cdce647308e586d

SHA512
8a6b3450fab0e4af69fe7f285cd507f25d65f3264e27f79e1de1c713383620e71a1dd60d47e041ae1b66961847551736fad92abe1af51865b47766e4c8d2eaf1

Download Submit
memory/1824-1-0x0000000000630000-0x0000000000954000-memory.dmp

Filesize
3.1MB

Download
memory/1824-0-0x00007FFC63F03000-0x00007FFC63F05000-memory.dmp

Filesize
8KB

Download
memory/1824-2-0x00007FFC63F00000-0x00007FFC649C1000-memory.dmp

Filesize
10.8MB

Download
memory/1824-8-0x00007FFC63F00000-0x00007FFC649C1000-memory.dmp

Filesize
10.8MB

Download
memory/4652-9-0x00007FFC63F00000-0x00007FFC649C1000-memory.dmp

Filesize
10.8MB

Download
memory/4652-10-0x000000001B970000-0x000000001B9C0000-memory.dmp

Filesize
320KB

Download
memory/4652-11-0x000000001BEC0000-0x000000001BF72000-memory.dmp

Filesize
712KB

Download
memory/4652-12-0x00007FFC63F00000-0x00007FFC649C1000-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