quasar | eca5d38701bc10469e0ef5419cbc0e977ec120b2de00d59db6d33e25a5af85a7

General

Target

c4e03e254f0a41469442ee067f02be60N.exe
Size

3.1MB
MD5

c4e03e254f0a41469442ee067f02be60
SHA1

1795efb978637d7e72fa15e82634bc6ba930c1c5
SHA256

eca5d38701bc10469e0ef5419cbc0e977ec120b2de00d59db6d33e25a5af85a7
SHA512

911e9718dfb71e20c3621d25f51b59271ef17abe38148f9219cadb7e0f9f1e38e193b303d86422aa98330eb11a5c81f56fa6476e7e8bb4718a0c50149e342974
SSDEEP

49152:jvSe821/aQWl8P0lSk3aKA3Z+nsiF3cvJfLoGdTpTHHB72eh2NT:jvp821/aQWl8P0lSk3DA3Z+nn3e

Score

10^/10

quasar teste spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

teste

C2

system-amendment.gl.at.ply.gg:41829

Mutex

426ebb25-3aa8-4137-bb2b-ced809dcd517

Attributes

encryption_key
EF4DECE7983D3EBE90798A972FE572E2201D67F9
install_name
Audio.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsAudioConfigs
subdirectory
Windows

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/712-1-0x0000000000340000-0x0000000000664000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016433-5.dat	family_quasar
behavioral1/memory/2112-8-0x0000000000930000-0x0000000000C54000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2112	Audio.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\Windows\Audio.exe	c4e03e254f0a41469442ee067f02be60N.exe
File opened for modification	C:\Windows\system32\Windows\Audio.exe	c4e03e254f0a41469442ee067f02be60N.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
3016	schtasks.exe
2780	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	712	c4e03e254f0a41469442ee067f02be60N.exe
Token: SeDebugPrivilege	2112	Audio.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2112	Audio.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2112	Audio.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 712 wrote to memory of 3016	712	c4e03e254f0a41469442ee067f02be60N.exe	30
PID 712 wrote to memory of 3016	712	c4e03e254f0a41469442ee067f02be60N.exe	30
PID 712 wrote to memory of 3016	712	c4e03e254f0a41469442ee067f02be60N.exe	30
PID 712 wrote to memory of 2112	712	c4e03e254f0a41469442ee067f02be60N.exe	32
PID 712 wrote to memory of 2112	712	c4e03e254f0a41469442ee067f02be60N.exe	32
PID 712 wrote to memory of 2112	712	c4e03e254f0a41469442ee067f02be60N.exe	32
PID 2112 wrote to memory of 2780	2112	Audio.exe	33
PID 2112 wrote to memory of 2780	2112	Audio.exe	33
PID 2112 wrote to memory of 2780	2112	Audio.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\c4e03e254f0a41469442ee067f02be60N.exe
"C:\Users\Admin\AppData\Local\Temp\c4e03e254f0a41469442ee067f02be60N.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:712
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "WindowsAudioConfigs" /sc ONLOGON /tr "C:\Windows\system32\Windows\Audio.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3016
- C:\Windows\system32\Windows\Audio.exe
  "C:\Windows\system32\Windows\Audio.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2112
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "WindowsAudioConfigs" /sc ONLOGON /tr "C:\Windows\system32\Windows\Audio.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2780

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:\Windows\System32\Windows\Audio.exe

Filesize
3.1MB

MD5
c4e03e254f0a41469442ee067f02be60

SHA1
1795efb978637d7e72fa15e82634bc6ba930c1c5

SHA256
eca5d38701bc10469e0ef5419cbc0e977ec120b2de00d59db6d33e25a5af85a7

SHA512
911e9718dfb71e20c3621d25f51b59271ef17abe38148f9219cadb7e0f9f1e38e193b303d86422aa98330eb11a5c81f56fa6476e7e8bb4718a0c50149e342974

Download Submit
memory/712-0-0x000007FEF6543000-0x000007FEF6544000-memory.dmp

Filesize
4KB

Download
memory/712-1-0x0000000000340000-0x0000000000664000-memory.dmp

Filesize
3.1MB

Download
memory/712-2-0x000007FEF6540000-0x000007FEF6F2C000-memory.dmp

Filesize
9.9MB

Download
memory/712-7-0x000007FEF6540000-0x000007FEF6F2C000-memory.dmp

Filesize
9.9MB

Download
memory/2112-8-0x0000000000930000-0x0000000000C54000-memory.dmp

Filesize
3.1MB

Download
memory/2112-9-0x000007FEF6540000-0x000007FEF6F2C000-memory.dmp

Filesize
9.9MB

Download
memory/2112-10-0x000007FEF6540000-0x000007FEF6F2C000-memory.dmp

Filesize
9.9MB

Download
memory/2112-11-0x000007FEF6540000-0x000007FEF6F2C000-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