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 2 IoCs

resource	yara_rule
behavioral2/memory/552-1-0x0000000000F50000-0x0000000001274000-memory.dmp	family_quasar
behavioral2/files/0x000e000000023bba-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4932	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
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
File created	C:\Windows\system32\a7\RuntimeBroker.exe	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.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
1152	schtasks.exe
3540	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	552	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe
Token: SeDebugPrivilege	4932	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4932	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 552 wrote to memory of 1152	552	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	82
PID 552 wrote to memory of 1152	552	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	82
PID 552 wrote to memory of 4932	552	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	84
PID 552 wrote to memory of 4932	552	9764bc832bfa8a9f3d7af1ea6747e7376774bd903e9cc545d9998f2657e97fa3.exe	84
PID 4932 wrote to memory of 3540	4932	RuntimeBroker.exe	85
PID 4932 wrote to memory of 3540	4932	RuntimeBroker.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\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:552
- 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:1152
- 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:4932
- - 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:3540

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/552-0-0x00007FFCD91D3000-0x00007FFCD91D5000-memory.dmp

Filesize
8KB

Download
memory/552-1-0x0000000000F50000-0x0000000001274000-memory.dmp

Filesize
3.1MB

Download
memory/552-2-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/552-9-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/4932-10-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/4932-11-0x000000001EE70000-0x000000001EEC0000-memory.dmp

Filesize
320KB

Download
memory/4932-12-0x000000001EF80000-0x000000001F032000-memory.dmp

Filesize
712KB

Download
memory/4932-13-0x00007FFCD91D0000-0x00007FFCD9C91000-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