quasar | ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed

General

Target

svhost.exe
Size

3.1MB
MD5

c80f9809068b2d6af93f3f30d8e5bd6d
SHA1

c1f5e71198cfcc328acf4c2b62d7782f15ebe55c
SHA256

ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed
SHA512

10bfa7c1398822252a094890a1d6b6c27d0c80a36614fb7e2d258337e697732424a47541e2f2007d01eff91a5b4c3b39f7677d03232706b307f9fad1aa24ed9c
SSDEEP

49152:SvbI22SsaNYfdPBldt698dBcjHmZ/g8dB0KoBdW/THHB72eh2NT:Svk22SsaNYfdPBldt6+dBcjHm9g0Z

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/2244-1-0x00000000012C0000-0x00000000015E4000-memory.dmp	family_quasar
behavioral1/files/0x0031000000018bbf-6.dat	family_quasar
behavioral1/memory/2948-9-0x0000000000A40000-0x0000000000D64000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2948	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
2876	schtasks.exe
3012	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	svhost.exe
Token: SeDebugPrivilege	2948	Sever Startup.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2948	Sever Startup.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2948	Sever Startup.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2948	Sever Startup.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2876	2244	svhost.exe	30
PID 2244 wrote to memory of 2876	2244	svhost.exe	30
PID 2244 wrote to memory of 2876	2244	svhost.exe	30
PID 2244 wrote to memory of 2948	2244	svhost.exe	32
PID 2244 wrote to memory of 2948	2244	svhost.exe	32
PID 2244 wrote to memory of 2948	2244	svhost.exe	32
PID 2948 wrote to memory of 3012	2948	Sever Startup.exe	33
PID 2948 wrote to memory of 3012	2948	Sever Startup.exe	33
PID 2948 wrote to memory of 3012	2948	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\svhost.exe
"C:\Users\Admin\AppData\Local\Temp\svhost.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2244
- 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:2876
- 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:2948
- - 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:3012

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
3.1MB

MD5
c80f9809068b2d6af93f3f30d8e5bd6d

SHA1
c1f5e71198cfcc328acf4c2b62d7782f15ebe55c

SHA256
ded57e1b9960e3bb53db62cfc1539d91179a6eb2b1d16e8eca2e6903205caeed

SHA512
10bfa7c1398822252a094890a1d6b6c27d0c80a36614fb7e2d258337e697732424a47541e2f2007d01eff91a5b4c3b39f7677d03232706b307f9fad1aa24ed9c

Download Submit
memory/2244-0-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

Filesize
4KB

Download
memory/2244-1-0x00000000012C0000-0x00000000015E4000-memory.dmp

Filesize
3.1MB

Download
memory/2244-2-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-8-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-9-0x0000000000A40000-0x0000000000D64000-memory.dmp

Filesize
3.1MB

Download
memory/2948-10-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-11-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-12-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads