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 3 IoCs

resource	yara_rule
behavioral1/memory/752-1-0x00000000001B0000-0x00000000004D4000-memory.dmp	family_quasar
behavioral1/files/0x000800000001941b-6.dat	family_quasar
behavioral1/memory/2520-9-0x0000000000A10000-0x0000000000D34000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2520	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	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

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
484	schtasks.exe
2332	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	752	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe
Token: SeDebugPrivilege	2520	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2520	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 752 wrote to memory of 484	752	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	31
PID 752 wrote to memory of 484	752	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	31
PID 752 wrote to memory of 484	752	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	31
PID 752 wrote to memory of 2520	752	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	33
PID 752 wrote to memory of 2520	752	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	33
PID 752 wrote to memory of 2520	752	f575fa2dd2b1745a20c2ad55dcdc08ad8423f7c6c224a5f241e7d144e18f31b0N.exe	33
PID 2520 wrote to memory of 2332	2520	RuntimeBroker.exe	34
PID 2520 wrote to memory of 2332	2520	RuntimeBroker.exe	34
PID 2520 wrote to memory of 2332	2520	RuntimeBroker.exe	34

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:752
- 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:484
- 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:2520
- - 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:2332

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/752-0-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

Filesize
4KB

Download
memory/752-1-0x00000000001B0000-0x00000000004D4000-memory.dmp

Filesize
3.1MB

Download
memory/752-2-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/752-11-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-8-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-9-0x0000000000A10000-0x0000000000D34000-memory.dmp

Filesize
3.1MB

Download
memory/2520-10-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-12-0x000007FEF5B10000-0x000007FEF64FC000-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