quasar | 9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3

General

Target

9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe
Size

3.1MB
MD5

57145c33045ce67e1c1fe7c763438ab1
SHA1

2a83ecef8bbe640577a2cc3f6602bbd8e7d6c847
SHA256

9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3
SHA512

7ce3d6dbd3c3b05ff6fe1ac57888123cf5e01e890c5b5e7204859b361841d15fdb8a460626355236b9c3df58824cb1979c187f34fa6d7d282517023f3a26a112
SSDEEP

49152:uvHI22SsaNYfdPBldt698dBcjH/N/9oGduTHHB72eh2NT:uvo22SsaNYfdPBldt6+dBcjH/Nl

Score

10^/10

quasar runtimebroker spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RuntimeBroker

C2

qrpn9be.localto.net:2810

Mutex

fc5edab1-6e8f-4963-98aa-bd077e08750f

Attributes

encryption_key
F749DCAC94A1FC3102D2B0CFBBFCB76086F86568
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 3 IoCs

resource	yara_rule
behavioral1/memory/644-1-0x0000000000A40000-0x0000000000D64000-memory.dmp	family_quasar
behavioral1/files/0x000700000001930d-6.dat	family_quasar
behavioral1/memory/2496-10-0x0000000000BE0000-0x0000000000F04000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2496	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\a7\RuntimeBroker.exe	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe
File opened for modification	C:\Windows\system32\a7	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.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

pid	Process
2432	schtasks.exe
2844	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	644	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe
Token: SeDebugPrivilege	2496	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2496	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 644 wrote to memory of 2432	644	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	30
PID 644 wrote to memory of 2432	644	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	30
PID 644 wrote to memory of 2432	644	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	30
PID 644 wrote to memory of 2496	644	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	32
PID 644 wrote to memory of 2496	644	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	32
PID 644 wrote to memory of 2496	644	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	32
PID 2496 wrote to memory of 2844	2496	RuntimeBroker.exe	33
PID 2496 wrote to memory of 2844	2496	RuntimeBroker.exe	33
PID 2496 wrote to memory of 2844	2496	RuntimeBroker.exe	33

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\9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe
"C:\Users\Admin\AppData\Local\Temp\9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:644
- 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:2432
- 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:2496
- - 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:2844

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
57145c33045ce67e1c1fe7c763438ab1

SHA1
2a83ecef8bbe640577a2cc3f6602bbd8e7d6c847

SHA256
9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3

SHA512
7ce3d6dbd3c3b05ff6fe1ac57888123cf5e01e890c5b5e7204859b361841d15fdb8a460626355236b9c3df58824cb1979c187f34fa6d7d282517023f3a26a112

Download Submit
memory/644-0-0x000007FEF5C83000-0x000007FEF5C84000-memory.dmp

Filesize
4KB

Download
memory/644-1-0x0000000000A40000-0x0000000000D64000-memory.dmp

Filesize
3.1MB

Download
memory/644-2-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download
memory/644-8-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-9-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-10-0x0000000000BE0000-0x0000000000F04000-memory.dmp

Filesize
3.1MB

Download
memory/2496-11-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-12-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads