quasar | 4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d

General

Target

4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe
Size

3.1MB
MD5

952c395d389a3bdc237c944bf1331b60
SHA1

5fc20754fdd26e2f115dfe13b88762131fe8533f
SHA256

4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d
SHA512

8b486a2dce469638dc8e355b1581af65d109406eb1df015125b350f94cf8c2f83b6c91ba9f46decb67b6650a4d011236e212a41b1220d6aedde7070c5a8ee824
SSDEEP

49152:Vvht62XlaSFNWPjljiFa2RoUYIdqWhybRjPLoGddJfTHHB72eh2NTv:VvL62XlaSFNWPjljiFXRoUYIdqWhWTO

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.17:5555

Mutex

3b1732e2-6a81-44bb-8d99-4472451b1cf3

Attributes

encryption_key
871AD53C1EE1C8F197D53D3E1DCA45CC62B82B8D
install_name
javaconfig.exe
log_directory
Logs
reconnect_delay
3000
startup_key
JavaUpdater
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/2372-1-0x0000000001130000-0x0000000001456000-memory.dmp	family_quasar
behavioral1/files/0x0032000000015d33-6.dat	family_quasar
behavioral1/memory/2572-10-0x00000000001E0000-0x0000000000506000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2572	javaconfig.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
2992	schtasks.exe
2808	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe
Token: SeDebugPrivilege	2572	javaconfig.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2572	javaconfig.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2572	javaconfig.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2572	javaconfig.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2808	2372	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe	30
PID 2372 wrote to memory of 2808	2372	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe	30
PID 2372 wrote to memory of 2808	2372	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe	30
PID 2372 wrote to memory of 2572	2372	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe	32
PID 2372 wrote to memory of 2572	2372	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe	32
PID 2372 wrote to memory of 2572	2372	4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe	32
PID 2572 wrote to memory of 2992	2572	javaconfig.exe	33
PID 2572 wrote to memory of 2992	2572	javaconfig.exe	33
PID 2572 wrote to memory of 2992	2572	javaconfig.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\4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe
"C:\Users\Admin\AppData\Local\Temp\4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00dN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2808
- C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.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:2572
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2992

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\SubDir\javaconfig.exe

Filesize
3.1MB

MD5
952c395d389a3bdc237c944bf1331b60

SHA1
5fc20754fdd26e2f115dfe13b88762131fe8533f

SHA256
4712eecd80b2276aa79c444d165a0e6c6a3ab0d7f535afad704efc7519bff00d

SHA512
8b486a2dce469638dc8e355b1581af65d109406eb1df015125b350f94cf8c2f83b6c91ba9f46decb67b6650a4d011236e212a41b1220d6aedde7070c5a8ee824

Download Submit
memory/2372-0-0x000007FEF6783000-0x000007FEF6784000-memory.dmp

Filesize
4KB

Download
memory/2372-1-0x0000000001130000-0x0000000001456000-memory.dmp

Filesize
3.1MB

Download
memory/2372-2-0x000007FEF6780000-0x000007FEF716C000-memory.dmp

Filesize
9.9MB

Download
memory/2372-8-0x000007FEF6780000-0x000007FEF716C000-memory.dmp

Filesize
9.9MB

Download
memory/2572-10-0x00000000001E0000-0x0000000000506000-memory.dmp

Filesize
3.1MB

Download
memory/2572-9-0x000007FEF6780000-0x000007FEF716C000-memory.dmp

Filesize
9.9MB

Download
memory/2572-11-0x000007FEF6780000-0x000007FEF716C000-memory.dmp

Filesize
9.9MB

Download
memory/2572-12-0x000007FEF6780000-0x000007FEF716C000-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