quasar | 6e32a831742951b814f3826c7377094db7ea20f81508043b946e3e4df6c5b162

General

Target

Client-built.exe
Size

3.1MB
MD5

5722eb2897c6a41e56fcc3173d9adf78
SHA1

a1fa064390fbe44cf7fb1eef8a4e68f26d4a5ef3
SHA256

6e32a831742951b814f3826c7377094db7ea20f81508043b946e3e4df6c5b162
SHA512

5ca756e5079b2a7498c6dba25da3717a467437fee713642dabafa8417040728b0531450a877a736ba3a248c7a6b33e317b7e795e437a5cc81cb6ad9e3a0227a7
SSDEEP

49152:Kv3I22SsaNYfdPBldt698dBcjHDxM/doGdq1THHB72eh2NT:Kv422SsaNYfdPBldt6+dBcjHDxMVa

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/1672-1-0x0000000000A80000-0x0000000000DA4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016cc9-5.dat	family_quasar
behavioral1/memory/2568-7-0x0000000001270000-0x0000000001594000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2568	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
1644	schtasks.exe
2820	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1672	Client-built.exe
Token: SeDebugPrivilege	2568	Calculator.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2568	Calculator.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2568	Calculator.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1644	1672	Client-built.exe	31
PID 1672 wrote to memory of 1644	1672	Client-built.exe	31
PID 1672 wrote to memory of 1644	1672	Client-built.exe	31
PID 1672 wrote to memory of 2568	1672	Client-built.exe	33
PID 1672 wrote to memory of 2568	1672	Client-built.exe	33
PID 1672 wrote to memory of 2568	1672	Client-built.exe	33
PID 2568 wrote to memory of 2820	2568	Calculator.exe	34
PID 2568 wrote to memory of 2820	2568	Calculator.exe	34
PID 2568 wrote to memory of 2820	2568	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:1672
- 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:1644
- 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:2568
- - 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:2820

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
5722eb2897c6a41e56fcc3173d9adf78

SHA1
a1fa064390fbe44cf7fb1eef8a4e68f26d4a5ef3

SHA256
6e32a831742951b814f3826c7377094db7ea20f81508043b946e3e4df6c5b162

SHA512
5ca756e5079b2a7498c6dba25da3717a467437fee713642dabafa8417040728b0531450a877a736ba3a248c7a6b33e317b7e795e437a5cc81cb6ad9e3a0227a7

Download Submit
memory/1672-0-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/1672-1-0x0000000000A80000-0x0000000000DA4000-memory.dmp

Filesize
3.1MB

Download
memory/1672-2-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/1672-8-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2568-9-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2568-10-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2568-7-0x0000000001270000-0x0000000001594000-memory.dmp

Filesize
3.1MB

Download
memory/2568-11-0x000007FEF6080000-0x000007FEF6A6C000-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