quasar | 47ff1dbbac79cfb9785493fa01f83c3e1ec4cb879ad2d3bb402734b97e92fe87

General

Target

rat.exe
Size

3.1MB
MD5

c4f3b1eef454c4f4f19862424484cbe5
SHA1

7ed25513276cd7199c0a8e934196c5fccf848629
SHA256

47ff1dbbac79cfb9785493fa01f83c3e1ec4cb879ad2d3bb402734b97e92fe87
SHA512

ae444abac7d15b972f16c3397ee28090fb5e94657bd4eb0a6b12ad1d58a6e76a037f3dc7eb4b72f9ef9c9726dbbdac733ef9c183c7ae5bd4b69979d765ff58cd
SSDEEP

49152:Sv3I22SsaNYfdPBldt698dBcjHQ/RJ6obR3LoGd/THHB72eh2NT:Sv422SsaNYfdPBldt6+dBcjHQ/RJ6C

Score

10^/10

quasar first spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

first

C2

192.168.1.197:4782

Mutex

44382739-6e8e-4a03-b838-6ed9f8f4bf36

Attributes

encryption_key
59DD70006F5E5424ACBA442199524AA9815F439E
install_name
Calculator.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RtkAudUService86
subdirectory
Calculator_UWP

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/524-1-0x0000000000060000-0x0000000000384000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016ace-5.dat	family_quasar
behavioral1/memory/2440-9-0x0000000000130000-0x0000000000454000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2440	Calculator.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
1516	schtasks.exe
2888	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	524	rat.exe
Token: SeDebugPrivilege	2440	Calculator.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2440	Calculator.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2440	Calculator.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 524 wrote to memory of 1516	524	rat.exe	31
PID 524 wrote to memory of 1516	524	rat.exe	31
PID 524 wrote to memory of 1516	524	rat.exe	31
PID 524 wrote to memory of 2440	524	rat.exe	33
PID 524 wrote to memory of 2440	524	rat.exe	33
PID 524 wrote to memory of 2440	524	rat.exe	33
PID 2440 wrote to memory of 2888	2440	Calculator.exe	34
PID 2440 wrote to memory of 2888	2440	Calculator.exe	34
PID 2440 wrote to memory of 2888	2440	Calculator.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\rat.exe
"C:\Users\Admin\AppData\Local\Temp\rat.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:524
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "RtkAudUService86" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1516
- C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe
  "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2440
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "RtkAudUService86" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2888

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe

Filesize
3.1MB

MD5
c4f3b1eef454c4f4f19862424484cbe5

SHA1
7ed25513276cd7199c0a8e934196c5fccf848629

SHA256
47ff1dbbac79cfb9785493fa01f83c3e1ec4cb879ad2d3bb402734b97e92fe87

SHA512
ae444abac7d15b972f16c3397ee28090fb5e94657bd4eb0a6b12ad1d58a6e76a037f3dc7eb4b72f9ef9c9726dbbdac733ef9c183c7ae5bd4b69979d765ff58cd

Download Submit
memory/524-0-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

Filesize
4KB

Download
memory/524-1-0x0000000000060000-0x0000000000384000-memory.dmp

Filesize
3.1MB

Download
memory/524-2-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/524-7-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2440-9-0x0000000000130000-0x0000000000454000-memory.dmp

Filesize
3.1MB

Download
memory/2440-10-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2440-8-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2440-11-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads