quasar | 13db2b7d1a27240835fa508fedcfce9ec31f70f9c602260ac028d40c3185b6aa

General

Target

Client-built.exe
Size

3.1MB
MD5

4f64eac42f35da5bc722e9a490ed9634
SHA1

4367e4fc0003764d72152f2beb15c57f7d584143
SHA256

13db2b7d1a27240835fa508fedcfce9ec31f70f9c602260ac028d40c3185b6aa
SHA512

3e27569395107a0f84be223c5366ab0804ad3a096d84267549134957194d28a9fa358e1f149abd0d70617813ac1ea1d6a8d8c986808ca7c2d00cdac24292eeaf
SSDEEP

49152:Dv3I22SsaNYfdPBldt698dBcjHkW4w9HarHhoGdSGTHHB72eh2NT:Dv422SsaNYfdPBldt6+dBcjHt9+

Score

10^/10

quasar first spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

first

C2

ZyloX-37288.portmap.host:37288

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/2264-1-0x0000000000FE0000-0x0000000001304000-memory.dmp	family_quasar
behavioral1/files/0x00150000000170f8-5.dat	family_quasar
behavioral1/memory/276-8-0x0000000001250000-0x0000000001574000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
276	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
2568	schtasks.exe
2888	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2264	Client-built.exe
Token: SeDebugPrivilege	276	Calculator.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
276	Calculator.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
276	Calculator.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 2568	2264	Client-built.exe	29
PID 2264 wrote to memory of 2568	2264	Client-built.exe	29
PID 2264 wrote to memory of 2568	2264	Client-built.exe	29
PID 2264 wrote to memory of 276	2264	Client-built.exe	31
PID 2264 wrote to memory of 276	2264	Client-built.exe	31
PID 2264 wrote to memory of 276	2264	Client-built.exe	31
PID 276 wrote to memory of 2888	276	Calculator.exe	32
PID 276 wrote to memory of 2888	276	Calculator.exe	32
PID 276 wrote to memory of 2888	276	Calculator.exe	32

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:2264
- 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:2568
- 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:276
- - 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

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Downloads

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

Filesize
3.1MB

MD5
4f64eac42f35da5bc722e9a490ed9634

SHA1
4367e4fc0003764d72152f2beb15c57f7d584143

SHA256
13db2b7d1a27240835fa508fedcfce9ec31f70f9c602260ac028d40c3185b6aa

SHA512
3e27569395107a0f84be223c5366ab0804ad3a096d84267549134957194d28a9fa358e1f149abd0d70617813ac1ea1d6a8d8c986808ca7c2d00cdac24292eeaf

Download Submit
memory/276-8-0x0000000001250000-0x0000000001574000-memory.dmp

Filesize
3.1MB

Download
memory/276-9-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/276-10-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/276-11-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2264-0-0x000007FEF64B3000-0x000007FEF64B4000-memory.dmp

Filesize
4KB

Download
memory/2264-1-0x0000000000FE0000-0x0000000001304000-memory.dmp

Filesize
3.1MB

Download
memory/2264-2-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2264-7-0x000007FEF64B0000-0x000007FEF6E9C000-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