quasar | 28caba9b2461231879877a8d8f9138e81144b657ebccfa3fbd57974aec9ef0d9

General

Target

Bootstrapper.exe
Size

3.1MB
MD5

a2986ce26c027866cd7014d2eac00650
SHA1

eb2f8daa042072e19eecb20f1f88ed38c0bbd901
SHA256

28caba9b2461231879877a8d8f9138e81144b657ebccfa3fbd57974aec9ef0d9
SHA512

51794da0b1fc9cc18b93bee836df04ea1299aecae98c260018601261a6f19b84f0b86f746480da872d53e376497160a1556bb5498a52418a44588c6aae72a31c
SSDEEP

49152:GvFt62XlaSFNWPjljiFa2RoUYIcVeQVxmGduWTHHB72eh2NT:Gv362XlaSFNWPjljiFXRoUYIOeQz

Score

10^/10

quasar rat spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Rat

C2

services-pos.gl.at.ply.gg:1234

Mutex

d3bc3858-ff4a-4aa8-97ec-67721ddcdeeb

Attributes

encryption_key
C8D618C9B5D2F91FFC94B6E9C868ECF80EB774F8
install_name
Client.exe
log_directory
ratted client
reconnect_delay
3000
startup_key
hello son
subdirectory
SubDir

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/1548-1-0x0000000000E60000-0x0000000001184000-memory.dmp	family_quasar
behavioral1/files/0x0035000000015cd1-5.dat	family_quasar
behavioral1/memory/2316-9-0x0000000000ED0000-0x00000000011F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2316	Client.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
2724	schtasks.exe
2588	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1548	Bootstrapper.exe
Token: SeDebugPrivilege	2316	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2316	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2316	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2316	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1548 wrote to memory of 2724	1548	Bootstrapper.exe	28
PID 1548 wrote to memory of 2724	1548	Bootstrapper.exe	28
PID 1548 wrote to memory of 2724	1548	Bootstrapper.exe	28
PID 1548 wrote to memory of 2316	1548	Bootstrapper.exe	30
PID 1548 wrote to memory of 2316	1548	Bootstrapper.exe	30
PID 1548 wrote to memory of 2316	1548	Bootstrapper.exe	30
PID 2316 wrote to memory of 2588	2316	Client.exe	31
PID 2316 wrote to memory of 2588	2316	Client.exe	31
PID 2316 wrote to memory of 2588	2316	Client.exe	31

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\Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1548
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "hello son " /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2724
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2316
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "hello son " /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2588

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\SubDir\Client.exe

Filesize
3.1MB

MD5
a2986ce26c027866cd7014d2eac00650

SHA1
eb2f8daa042072e19eecb20f1f88ed38c0bbd901

SHA256
28caba9b2461231879877a8d8f9138e81144b657ebccfa3fbd57974aec9ef0d9

SHA512
51794da0b1fc9cc18b93bee836df04ea1299aecae98c260018601261a6f19b84f0b86f746480da872d53e376497160a1556bb5498a52418a44588c6aae72a31c

Download Submit
memory/1548-0-0x000007FEF6163000-0x000007FEF6164000-memory.dmp

Filesize
4KB

Download
memory/1548-1-0x0000000000E60000-0x0000000001184000-memory.dmp

Filesize
3.1MB

Download
memory/1548-2-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/1548-8-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2316-7-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2316-9-0x0000000000ED0000-0x00000000011F4000-memory.dmp

Filesize
3.1MB

Download
memory/2316-10-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2316-11-0x000007FEF6160000-0x000007FEF6B4C000-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