quasar | e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5

General

Target

e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe
Size

3.1MB
MD5

8a86375d4afaad3b3784efe30144a978
SHA1

20b26de7d75461d01d01bb025c67bff370301655
SHA256

e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5
SHA512

126979671be90d7712e340f4c70aff968c7570a3abdb794a8f964c81f3830a2da9f0d5755dd9a0c84435232381b835deef74b67775fc2a6c1a789ad398ff53d5
SSDEEP

49152:7v/lL26AaNeWgPhlmVqvMQ7XSKd74wvMfY8oGdahZTHHB72eh2NTh:7vNL26AaNeWgPhlmVqkQ7XSKd74wIz

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

resource	yara_rule
behavioral2/memory/4236-1-0x0000000000DF0000-0x0000000001114000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b72-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1508	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\a7	RuntimeBroker.exe
File created	C:\Windows\system32\a7\RuntimeBroker.exe	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe
File opened for modification	C:\Windows\system32\a7	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	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
4624	schtasks.exe
3588	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4236	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe
Token: SeDebugPrivilege	1508	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1508	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 3588	4236	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	85
PID 4236 wrote to memory of 3588	4236	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	85
PID 4236 wrote to memory of 1508	4236	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	87
PID 4236 wrote to memory of 1508	4236	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	87
PID 1508 wrote to memory of 4624	1508	RuntimeBroker.exe	89
PID 1508 wrote to memory of 4624	1508	RuntimeBroker.exe	89

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\e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe
"C:\Users\Admin\AppData\Local\Temp\e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4236
- 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:3588
- 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:1508
- - 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:4624

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
8a86375d4afaad3b3784efe30144a978

SHA1
20b26de7d75461d01d01bb025c67bff370301655

SHA256
e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5

SHA512
126979671be90d7712e340f4c70aff968c7570a3abdb794a8f964c81f3830a2da9f0d5755dd9a0c84435232381b835deef74b67775fc2a6c1a789ad398ff53d5

Download Submit
memory/1508-9-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/1508-11-0x000000001D650000-0x000000001D6A0000-memory.dmp

Filesize
320KB

Download
memory/1508-12-0x000000001D760000-0x000000001D812000-memory.dmp

Filesize
712KB

Download
memory/1508-13-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/4236-0-0x00007FFC30343000-0x00007FFC30345000-memory.dmp

Filesize
8KB

Download
memory/4236-1-0x0000000000DF0000-0x0000000001114000-memory.dmp

Filesize
3.1MB

Download
memory/4236-2-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/4236-10-0x00007FFC30340000-0x00007FFC30E01000-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