quasar | a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043

General

Target

a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe
Size

3.1MB
MD5

b29de0d04753ec41025d33b6c305b91d
SHA1

1fbb9cfbda8c550a142a80cef83706923af87cd8
SHA256

a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043
SHA512

cfa6f06cb7e2a8e1ff888fc783e0271f61db39251350423432d4be829188c98cd744e946595ccc01c9ad2b03053a10efa13312ce70c80f837293b6785c215816
SSDEEP

49152:zvHI22SsaNYfdPBldt698dBcjHOd/mBx3LoGdbTHHB72eh2NT:zvo22SsaNYfdPBldt6+dBcjHQ/e

Score

10^/10

quasar windows client spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Windows Client

C2

148.163.102.170:4782

Mutex

4c18e02c-7c39-4a5e-bbef-16fe13828101

Attributes

encryption_key
73B0A3AC50C78E243EA93BF9E60C9BC63D63CA26
install_name
Sever Startup.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Startup
subdirectory
Windows Startup

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/2592-9-0x0000000000B10000-0x0000000000E34000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016c66-7.dat	family_quasar
behavioral1/memory/2556-1-0x00000000010F0000-0x0000000001414000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2592	Sever Startup.exe

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
2580	schtasks.exe
2248	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2556	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe
Token: SeDebugPrivilege	2592	Sever Startup.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2592	Sever Startup.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2592	Sever Startup.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2592	Sever Startup.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2556 wrote to memory of 2580	2556	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	30
PID 2556 wrote to memory of 2580	2556	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	30
PID 2556 wrote to memory of 2580	2556	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	30
PID 2556 wrote to memory of 2592	2556	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	32
PID 2556 wrote to memory of 2592	2556	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	32
PID 2556 wrote to memory of 2592	2556	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	32
PID 2592 wrote to memory of 2248	2592	Sever Startup.exe	33
PID 2592 wrote to memory of 2248	2592	Sever Startup.exe	33
PID 2592 wrote to memory of 2248	2592	Sever Startup.exe	33

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\a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe
"C:\Users\Admin\AppData\Local\Temp\a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2556
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Windows Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2580
- C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe
  "C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.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:2592
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Windows Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2248

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Windows Startup\Sever Startup.exe

Filesize
3.1MB

MD5
b29de0d04753ec41025d33b6c305b91d

SHA1
1fbb9cfbda8c550a142a80cef83706923af87cd8

SHA256
a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043

SHA512
cfa6f06cb7e2a8e1ff888fc783e0271f61db39251350423432d4be829188c98cd744e946595ccc01c9ad2b03053a10efa13312ce70c80f837293b6785c215816

Download Submit
memory/2556-10-0x000007FEF53A0000-0x000007FEF5D8C000-memory.dmp

Filesize
9.9MB

Download
memory/2556-2-0x000007FEF53A0000-0x000007FEF5D8C000-memory.dmp

Filesize
9.9MB

Download
memory/2556-1-0x00000000010F0000-0x0000000001414000-memory.dmp

Filesize
3.1MB

Download
memory/2556-0-0x000007FEF53A3000-0x000007FEF53A4000-memory.dmp

Filesize
4KB

Download
memory/2592-11-0x000007FEF53A0000-0x000007FEF5D8C000-memory.dmp

Filesize
9.9MB

Download
memory/2592-9-0x0000000000B10000-0x0000000000E34000-memory.dmp

Filesize
3.1MB

Download
memory/2592-8-0x000007FEF53A0000-0x000007FEF5D8C000-memory.dmp

Filesize
9.9MB

Download
memory/2592-12-0x000007FEF53A0000-0x000007FEF5D8C000-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