quasar | 4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675

General

Target

4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe
Size

3.1MB
MD5

69b4286cd2963d3c89f35fdec630576c
SHA1

ea2a6274c2b8b866e91b72c3baa8f3162db92388
SHA256

4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675
SHA512

2e6b0952e08af312a56b355fd1f24384162c54dd0e9c091d476311642c6321184f586695955a879be9e118b9ace3ce77e629fac94b480c37b2da26845c059841
SSDEEP

49152:av/lL26AaNeWgPhlmVqvMQ7XSKPHgMtDw48coGdMTHHB72eh2NT6:avNL26AaNeWgPhlmVqkQ7XSKPAMJY

Score

10^/10

quasar database spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

database

C2

91.160.181.237:4782

91.160.181.237:4783

Mutex

bcda0faa-47b1-4e7d-be7c-8ff6fbc69a61

Attributes

encryption_key
65940F11374651C87E8131C4328E542AEFE6F05D
install_name
Runtlme Broker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Runtlme Broker
subdirectory
Runtlme Broker

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/3708-1-0x0000000000C20000-0x0000000000F44000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023ca5-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1504	Runtlme Broker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe
File opened for modification	C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe
File opened for modification	C:\Windows\system32\Runtlme Broker	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe
File opened for modification	C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe	Runtlme Broker.exe
File opened for modification	C:\Windows\system32\Runtlme Broker	Runtlme Broker.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
2516	schtasks.exe
5064	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3708	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe
Token: SeDebugPrivilege	1504	Runtlme Broker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1504	Runtlme Broker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3708 wrote to memory of 2516	3708	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe	83
PID 3708 wrote to memory of 2516	3708	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe	83
PID 3708 wrote to memory of 1504	3708	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe	85
PID 3708 wrote to memory of 1504	3708	4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe	85
PID 1504 wrote to memory of 5064	1504	Runtlme Broker.exe	86
PID 1504 wrote to memory of 5064	1504	Runtlme Broker.exe	86

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\4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe
"C:\Users\Admin\AppData\Local\Temp\4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3708
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Runtlme Broker" /sc ONLOGON /tr "C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2516
- C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe
  "C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1504
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Runtlme Broker" /sc ONLOGON /tr "C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5064

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\Runtlme Broker\Runtlme Broker.exe

Filesize
3.1MB

MD5
69b4286cd2963d3c89f35fdec630576c

SHA1
ea2a6274c2b8b866e91b72c3baa8f3162db92388

SHA256
4aa3e2e4f7c2d657bcbebe307a15ab4dee819e3d70fec4e92b78fd483690e675

SHA512
2e6b0952e08af312a56b355fd1f24384162c54dd0e9c091d476311642c6321184f586695955a879be9e118b9ace3ce77e629fac94b480c37b2da26845c059841

Download Submit
memory/1504-9-0x00007FFF26820000-0x00007FFF272E1000-memory.dmp

Filesize
10.8MB

Download
memory/1504-11-0x00007FFF26820000-0x00007FFF272E1000-memory.dmp

Filesize
10.8MB

Download
memory/1504-12-0x000000001C1D0000-0x000000001C220000-memory.dmp

Filesize
320KB

Download
memory/1504-13-0x000000001C2E0000-0x000000001C392000-memory.dmp

Filesize
712KB

Download
memory/1504-14-0x00007FFF26820000-0x00007FFF272E1000-memory.dmp

Filesize
10.8MB

Download
memory/3708-0-0x00007FFF26823000-0x00007FFF26825000-memory.dmp

Filesize
8KB

Download
memory/3708-1-0x0000000000C20000-0x0000000000F44000-memory.dmp

Filesize
3.1MB

Download
memory/3708-2-0x00007FFF26820000-0x00007FFF272E1000-memory.dmp

Filesize
10.8MB

Download
memory/3708-10-0x00007FFF26820000-0x00007FFF272E1000-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