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 3 IoCs

resource	yara_rule
behavioral1/memory/2640-1-0x00000000012A0000-0x00000000015C4000-memory.dmp	family_quasar
behavioral1/files/0x00330000000164de-6.dat	family_quasar
behavioral1/memory/2656-10-0x0000000000280000-0x00000000005A4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2656	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
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
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
2708	schtasks.exe
2808	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2640	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe
Token: SeDebugPrivilege	2656	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2656	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2640 wrote to memory of 2808	2640	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	30
PID 2640 wrote to memory of 2808	2640	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	30
PID 2640 wrote to memory of 2808	2640	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	30
PID 2640 wrote to memory of 2656	2640	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	32
PID 2640 wrote to memory of 2656	2640	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	32
PID 2640 wrote to memory of 2656	2640	e533ec44e0fbee8057cf1b3ad4782b277a5801eb02eab57082634f34bb6cfcc5.exe	32
PID 2656 wrote to memory of 2708	2656	RuntimeBroker.exe	33
PID 2656 wrote to memory of 2708	2656	RuntimeBroker.exe	33
PID 2656 wrote to memory of 2708	2656	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\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:2640
- 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:2808
- 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:2656
- - 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:2708

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/2640-0-0x000007FEF5DF3000-0x000007FEF5DF4000-memory.dmp

Filesize
4KB

Download
memory/2640-1-0x00000000012A0000-0x00000000015C4000-memory.dmp

Filesize
3.1MB

Download
memory/2640-2-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

Filesize
9.9MB

Download
memory/2640-8-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

Filesize
9.9MB

Download
memory/2656-9-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

Filesize
9.9MB

Download
memory/2656-10-0x0000000000280000-0x00000000005A4000-memory.dmp

Filesize
3.1MB

Download
memory/2656-11-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

Filesize
9.9MB

Download
memory/2656-12-0x000007FEF5DF0000-0x000007FEF67DC000-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