quasar | aef4fc9260304e3a2ab4da2abe82a732b3d41881a7a50a11b4fb93f5254439ce

General

Target

Client-built.exe
Size

3.1MB
MD5

007d68229a59ff99219af5cf03cface3
SHA1

6f38fb49e049b41c83792ef5f36f169a31a2b0ca
SHA256

aef4fc9260304e3a2ab4da2abe82a732b3d41881a7a50a11b4fb93f5254439ce
SHA512

9a1eb07013fcacf437e223f2bb713cd370fa4a0d54c3f5084313a2d0e25045e85f1d10ef4f78c3153e3aa5bfef5a6ccfa57a0bdfec422a899f7187d72ad16724
SSDEEP

49152:Cvkt62XlaSFNWPjljiFa2RoUYIpQrhfmztnoGdy/THHB72eh2NT:Cv462XlaSFNWPjljiFXRoUYImrhm

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

slave

C2

192.168.0.192:4782

Mutex

fe472357-144d-4a3a-8e1d-9ef513643cc1

Attributes

encryption_key
5E806E3CE72868F0BCCBB7C901531979B646D78D
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
quasar
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/2724-1-0x00000000011E0000-0x0000000001504000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015d75-5.dat	family_quasar
behavioral1/memory/2600-7-0x0000000001390000-0x00000000016B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2600	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
2852	schtasks.exe
1976	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2724	Client-built.exe
Token: SeDebugPrivilege	2600	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2600	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2600	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2600	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2724 wrote to memory of 2852	2724	Client-built.exe	30
PID 2724 wrote to memory of 2852	2724	Client-built.exe	30
PID 2724 wrote to memory of 2852	2724	Client-built.exe	30
PID 2724 wrote to memory of 2600	2724	Client-built.exe	32
PID 2724 wrote to memory of 2600	2724	Client-built.exe	32
PID 2724 wrote to memory of 2600	2724	Client-built.exe	32
PID 2600 wrote to memory of 1976	2600	Client.exe	33
PID 2600 wrote to memory of 1976	2600	Client.exe	33
PID 2600 wrote to memory of 1976	2600	Client.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2724
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "quasar" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2852
- 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:2600
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "quasar" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1976

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
007d68229a59ff99219af5cf03cface3

SHA1
6f38fb49e049b41c83792ef5f36f169a31a2b0ca

SHA256
aef4fc9260304e3a2ab4da2abe82a732b3d41881a7a50a11b4fb93f5254439ce

SHA512
9a1eb07013fcacf437e223f2bb713cd370fa4a0d54c3f5084313a2d0e25045e85f1d10ef4f78c3153e3aa5bfef5a6ccfa57a0bdfec422a899f7187d72ad16724

Download Submit
memory/2600-7-0x0000000001390000-0x00000000016B4000-memory.dmp

Filesize
3.1MB

Download
memory/2600-10-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2600-8-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2600-11-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2724-0-0x000007FEF4E83000-0x000007FEF4E84000-memory.dmp

Filesize
4KB

Download
memory/2724-1-0x00000000011E0000-0x0000000001504000-memory.dmp

Filesize
3.1MB

Download
memory/2724-2-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2724-9-0x000007FEF4E80000-0x000007FEF586C000-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