quasar | 492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000c

Analysis

max time kernel
119s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-11-2024 04:48

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General

Target

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe
Size

3.1MB
MD5

b77d847b1d41cde07f81168c7addbb10
SHA1

2d5c614efdef7ab59fa5fb665d6ed1a79502b97f
SHA256

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000c
SHA512

6fff7c253c543e370dcb459f0cc66003f57fbc35f40af5744deca97a2c593bf0881f96c845bbc15963e9eb81a652aec78a500ea41f2d1af5fbb5f0ec04c6c9f6
SSDEEP

49152:nvelL26AaNeWgPhlmVqvMQ7XSKqaRJ61bR3LoGdEjTHHB72eh2NT:nvOL26AaNeWgPhlmVqkQ7XSKqaRJ6H

Score

10^/10

quasar runtimebroker spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RuntimeBroker

siembonik-44853.portmap.host:44853

Mutex

df483a08-855b-4bf5-bdcb-174788919889

Attributes

encryption_key
A8573AD4438B1D5F6207F7C03CCC7F1E2D4B13DF
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RuntimeBroker
subdirectory
am1

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1216-1-0x0000000000200000-0x0000000000524000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cc7-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

RuntimeBroker.exe

pid	Process
944	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

Processes:

schtasks.exeschtasks.exe

pid	Process
1108	schtasks.exe
4464	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exeRuntimeBroker.exe

description	pid	Process
Token: SeDebugPrivilege	1216	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe
Token: SeDebugPrivilege	944	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RuntimeBroker.exe

pid	Process
944	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exeRuntimeBroker.exe

description	pid	Process	procid_target
PID 1216 wrote to memory of 1108	1216	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	85
PID 1216 wrote to memory of 1108	1216	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	85
PID 1216 wrote to memory of 944	1216	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	87
PID 1216 wrote to memory of 944	1216	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	87
PID 944 wrote to memory of 4464	944	RuntimeBroker.exe	91
PID 944 wrote to memory of 4464	944	RuntimeBroker.exe	91

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\492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe
"C:\Users\Admin\AppData\Local\Temp\492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1216
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1108
- C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe
  "C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:944
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4464

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\am1\RuntimeBroker.exe

Filesize
3.1MB

MD5
b77d847b1d41cde07f81168c7addbb10

SHA1
2d5c614efdef7ab59fa5fb665d6ed1a79502b97f

SHA256
492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000c

SHA512
6fff7c253c543e370dcb459f0cc66003f57fbc35f40af5744deca97a2c593bf0881f96c845bbc15963e9eb81a652aec78a500ea41f2d1af5fbb5f0ec04c6c9f6

Download Submit
memory/944-10-0x00007FF887D10000-0x00007FF8887D1000-memory.dmp

Filesize
10.8MB

Download
memory/944-11-0x000000001D600000-0x000000001D650000-memory.dmp

Filesize
320KB

Download
memory/944-12-0x000000001D710000-0x000000001D7C2000-memory.dmp

Filesize
712KB

Download
memory/944-13-0x00007FF887D10000-0x00007FF8887D1000-memory.dmp

Filesize
10.8MB

Download
memory/1216-0-0x00007FF887D13000-0x00007FF887D15000-memory.dmp

Filesize
8KB

Download
memory/1216-1-0x0000000000200000-0x0000000000524000-memory.dmp

Filesize
3.1MB

Download
memory/1216-2-0x00007FF887D10000-0x00007FF8887D1000-memory.dmp

Filesize
10.8MB

Download
memory/1216-9-0x00007FF887D10000-0x00007FF8887D1000-memory.dmp

Filesize
10.8MB

Download