quasar | 545155733d81e6f53f8aaf0aa36ea26dcaf8d07ede5059a22b095050fd766c4c

Analysis

max time kernel
149s
max time network
151s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20250314-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250314-enlocale:en-usos:windows10-ltsc_2021-x64system
submitted
01/04/2025, 16:00

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General

Target

RuntimeBroker.exe
Size

3.1MB
MD5

a2f4860ad05a29d90e63f7a2f42dd1d9
SHA1

c4f6c99b7e6f895114c6e5303391f3839bc4ed7c
SHA256

545155733d81e6f53f8aaf0aa36ea26dcaf8d07ede5059a22b095050fd766c4c
SHA512

d9e82e2470cc95ebfb4eee7c466d16e52e1de2e8819b4a18b9edff476744b5cbf2233b966b22ff80cdbcf2557d704840e9aade9d83cfffa6680f54824dce3c37
SSDEEP

49152:rviG42pda6D+/PjlLOlg6yQipVA4mLmz9LoGdSTHHB72eh2NT:rvF42pda6D+/PjlLOlZyQipVA4my

Score

10^/10

quasar revershe spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

revershe

holefo2785-22820.portmap.host:22820

Mutex

3292df4f-7857-466e-995d-33740d2e756e

Attributes

encryption_key
14B98F14C8A2574E32B0396E72660E0C80B14AC2
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RuntimeBroker
subdirectory
discord\Network

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/3972-1-0x0000000000600000-0x0000000000924000-memory.dmp	family_quasar
behavioral1/files/0x00070000000281c5-2.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2720	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
2376	schtasks.exe
5544	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3972	RuntimeBroker.exe
Token: SeDebugPrivilege	2720	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 2376	3972	RuntimeBroker.exe	82
PID 3972 wrote to memory of 2376	3972	RuntimeBroker.exe	82
PID 3972 wrote to memory of 2720	3972	RuntimeBroker.exe	84
PID 3972 wrote to memory of 2720	3972	RuntimeBroker.exe	84
PID 2720 wrote to memory of 5544	2720	Client.exe	85
PID 2720 wrote to memory of 5544	2720	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\RuntimeBroker.exe
"C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\discord\Network\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2376
- C:\Users\Admin\AppData\Roaming\discord\Network\Client.exe
  "C:\Users\Admin\AppData\Roaming\discord\Network\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\discord\Network\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5544

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\discord\Network\Client.exe

Filesize
3.1MB

MD5
a2f4860ad05a29d90e63f7a2f42dd1d9

SHA1
c4f6c99b7e6f895114c6e5303391f3839bc4ed7c

SHA256
545155733d81e6f53f8aaf0aa36ea26dcaf8d07ede5059a22b095050fd766c4c

SHA512
d9e82e2470cc95ebfb4eee7c466d16e52e1de2e8819b4a18b9edff476744b5cbf2233b966b22ff80cdbcf2557d704840e9aade9d83cfffa6680f54824dce3c37

Download Submit
memory/2720-4-0x00007FFD98BE0000-0x00007FFD996A2000-memory.dmp

Filesize
10.8MB

Download
memory/2720-5-0x00007FFD98BE0000-0x00007FFD996A2000-memory.dmp

Filesize
10.8MB

Download
memory/2720-6-0x0000000002850000-0x00000000028A0000-memory.dmp

Filesize
320KB

Download
memory/2720-7-0x000000001C4D0000-0x000000001C582000-memory.dmp

Filesize
712KB

Download
memory/2720-8-0x00007FFD98BE0000-0x00007FFD996A2000-memory.dmp

Filesize
10.8MB

Download
memory/3972-0-0x00007FFD98BE3000-0x00007FFD98BE5000-memory.dmp

Filesize
8KB

Download
memory/3972-1-0x0000000000600000-0x0000000000924000-memory.dmp

Filesize
3.1MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads