quasar | a9c9bd256079b877e5b3f85d26312900ce865127e7d91e809ad745b306ab6a76

General

Target

Client-built.exe
Size

3.1MB
MD5

351640042c68134bc37147809e764934
SHA1

d56befbdb75ad0592151d38ff5c9dc746ec4e22f
SHA256

a9c9bd256079b877e5b3f85d26312900ce865127e7d91e809ad745b306ab6a76
SHA512

250caa5035b6283e6ddabb4b37a73c127266864913d98a271d5800327cd83817fb0cdbc52723e78e69f04b6f4e9aa5f4d477c173a3021bcc7ddec8fd3b6ff532
SSDEEP

49152:Dv3I22SsaNYfdPBldt698dBcjHhiukDvJ9IoGdS1THHB72eh2NT:Dv422SsaNYfdPBldt6+dBcjHXkgC

Score

10^/10

quasar first spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

first

C2

ZyloX-52247.portmap.host: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/524-1-0x0000000000D60000-0x0000000001084000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016ace-5.dat	family_quasar
behavioral1/memory/2388-9-0x0000000000800000-0x0000000000B24000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2388	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
2892	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	524	Client-built.exe
Token: SeDebugPrivilege	2388	Calculator.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2388	Calculator.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2388	Calculator.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 524 wrote to memory of 1516	524	Client-built.exe	31
PID 524 wrote to memory of 1516	524	Client-built.exe	31
PID 524 wrote to memory of 1516	524	Client-built.exe	31
PID 524 wrote to memory of 2388	524	Client-built.exe	33
PID 524 wrote to memory of 2388	524	Client-built.exe	33
PID 524 wrote to memory of 2388	524	Client-built.exe	33
PID 2388 wrote to memory of 2892	2388	Calculator.exe	34
PID 2388 wrote to memory of 2892	2388	Calculator.exe	34
PID 2388 wrote to memory of 2892	2388	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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.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:2388
- - 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:2892

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

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Downloads

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

Filesize
3.1MB

MD5
351640042c68134bc37147809e764934

SHA1
d56befbdb75ad0592151d38ff5c9dc746ec4e22f

SHA256
a9c9bd256079b877e5b3f85d26312900ce865127e7d91e809ad745b306ab6a76

SHA512
250caa5035b6283e6ddabb4b37a73c127266864913d98a271d5800327cd83817fb0cdbc52723e78e69f04b6f4e9aa5f4d477c173a3021bcc7ddec8fd3b6ff532

Download Submit
memory/524-0-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/524-1-0x0000000000D60000-0x0000000001084000-memory.dmp

Filesize
3.1MB

Download
memory/524-2-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/524-7-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2388-8-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2388-9-0x0000000000800000-0x0000000000B24000-memory.dmp

Filesize
3.1MB

Download
memory/2388-10-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2388-11-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2388-12-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads