quasar | f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0

General

Target

f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe
Size

3.1MB
MD5

15ac9a2e7aa9fba93576ca6efe92f960
SHA1

38cea1bad1bcc254ffaec2ec38afaf6e43c7a9eb
SHA256

f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0
SHA512

b195a2ed477b2b0f20543982a27426ac04097e3a7134fe12b273cabd2da52002ff933155f7c8aa511dabc29c4173fb7a1a2aa997f626725250acd6427af2109a
SSDEEP

49152:7v/lL26AaNeWgPhlmVqvMQ7XSKd74wvMfY8oGdahZTHHB72eh2NT:7vNL26AaNeWgPhlmVqkQ7XSKd74wI

Score

10^/10

quasar runtimebroker spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RuntimeBroker

C2

anonam39-41248.portmap.io:41248

Mutex

bcabad1b-b1a9-478b-a187-3607b6476fd1

Attributes

encryption_key
479AF86B7B3A0AC9CE19AAE974A681BB6EE1949C
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RuntimeBroker
subdirectory
a7

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/1188-1-0x00000000005E0000-0x0000000000904000-memory.dmp	family_quasar
C:\Windows\system32\a7\RuntimeBroker.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

RuntimeBroker.exe

pid process

2524 RuntimeBroker.exe

pid	process
2524	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

Processes:

f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exeRuntimeBroker.exe

description	ioc	process
File created	C:\Windows\system32\a7\RuntimeBroker.exe	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe
File opened for modification	C:\Windows\system32\a7	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	RuntimeBroker.exe
File opened for modification	C:\Windows\system32\a7	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

3240 schtasks.exe
4180 schtasks.exe

pid	process
3240	schtasks.exe
4180	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exeRuntimeBroker.exe

description	pid	process
Token: SeDebugPrivilege	1188	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe
Token: SeDebugPrivilege	2524	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RuntimeBroker.exe

pid process

2524 RuntimeBroker.exe

pid	process
2524	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exeRuntimeBroker.exe

description	pid	process	target process
PID 1188 wrote to memory of 3240	1188	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	schtasks.exe
PID 1188 wrote to memory of 3240	1188	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	schtasks.exe
PID 1188 wrote to memory of 2524	1188	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	RuntimeBroker.exe
PID 1188 wrote to memory of 2524	1188	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	RuntimeBroker.exe
PID 2524 wrote to memory of 4180	2524	RuntimeBroker.exe	schtasks.exe
PID 2524 wrote to memory of 4180	2524	RuntimeBroker.exe	schtasks.exe

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\f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe
"C:\Users\Admin\AppData\Local\Temp\f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\a7\RuntimeBroker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3240
- C:\Windows\system32\a7\RuntimeBroker.exe
  "C:\Windows\system32\a7\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2524
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\a7\RuntimeBroker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4180

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\system32\a7\RuntimeBroker.exe

Filesize
3.1MB

MD5
15ac9a2e7aa9fba93576ca6efe92f960

SHA1
38cea1bad1bcc254ffaec2ec38afaf6e43c7a9eb

SHA256
f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0

SHA512
b195a2ed477b2b0f20543982a27426ac04097e3a7134fe12b273cabd2da52002ff933155f7c8aa511dabc29c4173fb7a1a2aa997f626725250acd6427af2109a

Download Submit
memory/1188-0-0x00007FFFFDBF3000-0x00007FFFFDBF5000-memory.dmp

Filesize
8KB

Download
memory/1188-1-0x00000000005E0000-0x0000000000904000-memory.dmp

Filesize
3.1MB

Download
memory/1188-2-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/1188-10-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2524-9-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2524-11-0x000000001C390000-0x000000001C3E0000-memory.dmp

Filesize
320KB

Download
memory/2524-12-0x000000001CDC0000-0x000000001CE72000-memory.dmp

Filesize
712KB

Download
memory/2524-13-0x00007FFFFDBF0000-0x00007FFFFE6B1000-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