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 2 IoCs

resource	yara_rule
behavioral2/memory/5108-1-0x00000000005C0000-0x00000000008E4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b96-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1476	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
1864	schtasks.exe
2652	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5108	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe
Token: SeDebugPrivilege	1476	Sever Startup.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1476	Sever Startup.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1476	Sever Startup.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1476	Sever Startup.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5108 wrote to memory of 1864	5108	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	82
PID 5108 wrote to memory of 1864	5108	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	82
PID 5108 wrote to memory of 1476	5108	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	84
PID 5108 wrote to memory of 1476	5108	a4cbe08b12caf091cec50234d9a2d54ffbbd308b4e3c76ef5394c21a35d0e043.exe	84
PID 1476 wrote to memory of 2652	1476	Sever Startup.exe	85
PID 1476 wrote to memory of 2652	1476	Sever Startup.exe	85

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:5108
- 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:1864
- 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:1476
- - 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:2652

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/1476-9-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/1476-11-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/1476-12-0x000000001BFE0000-0x000000001C030000-memory.dmp

Filesize
320KB

Download
memory/1476-13-0x000000001DFF0000-0x000000001E0A2000-memory.dmp

Filesize
712KB

Download
memory/1476-14-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/5108-0-0x00007FF868443000-0x00007FF868445000-memory.dmp

Filesize
8KB

Download
memory/5108-1-0x00000000005C0000-0x00000000008E4000-memory.dmp

Filesize
3.1MB

Download
memory/5108-2-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/5108-10-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads