quasar | 41bd24fe8b67e9e3cd5bb272a07640de345c39f6cb6c4057491838de95dac6d7

General

Target

Client-built.exe
Size

3.1MB
MD5

cf049d1ba0fceeb5348f71e15889fbc4
SHA1

94cc88586240456f777aed403d955027555db8d1
SHA256

41bd24fe8b67e9e3cd5bb272a07640de345c39f6cb6c4057491838de95dac6d7
SHA512

2e7a7d3415164cb453193fdceef02d46c35f9103521b33bc424c9b79659fac2e4b9deb0fe8754f0842546b51403181032b6c7a05116adfc4f2b8fd599c3ad6ed
SSDEEP

49152:avelL26AaNeWgPhlmVqvMQ7XSKIxOEMkek/JxwoGdeTHHB72eh2NT:avOL26AaNeWgPhlmVqkQ7XSKIxty

Score

10^/10

quasar rat 5 (epic verison)persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RAT 5 (EPIC VERISON)

C2

serveo.net:11453

Mutex

7a1301f7-dc6f-4847-a8ee-ca627a9efa0f

Attributes

encryption_key
3B793156AD6D884F51309D0E992DAA75D03D2783
install_name
Application Frame Host.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft
subdirectory
SubDir

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/3508-1-0x0000000000DB0000-0x00000000010D4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b63-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
888	Application Frame Host.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "\"C:\\Users\\Admin\\AppData\\Roaming\\SubDir\\Application Frame Host.exe\""	Client-built.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "\"C:\\Users\\Admin\\AppData\\Roaming\\SubDir\\Application Frame Host.exe\""	Application Frame Host.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
3964	schtasks.exe
3460	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3508	Client-built.exe
Token: SeDebugPrivilege	888	Application Frame Host.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3508 wrote to memory of 3964	3508	Client-built.exe	82
PID 3508 wrote to memory of 3964	3508	Client-built.exe	82
PID 3508 wrote to memory of 888	3508	Client-built.exe	84
PID 3508 wrote to memory of 888	3508	Client-built.exe	84
PID 888 wrote to memory of 3460	888	Application Frame Host.exe	85
PID 888 wrote to memory of 3460	888	Application Frame Host.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3508
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Microsoft" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Application Frame Host.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3964
- C:\Users\Admin\AppData\Roaming\SubDir\Application Frame Host.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Application Frame Host.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:888
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Microsoft" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Application Frame Host.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3460

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

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\Application Frame Host.exe

Filesize
3.1MB

MD5
cf049d1ba0fceeb5348f71e15889fbc4

SHA1
94cc88586240456f777aed403d955027555db8d1

SHA256
41bd24fe8b67e9e3cd5bb272a07640de345c39f6cb6c4057491838de95dac6d7

SHA512
2e7a7d3415164cb453193fdceef02d46c35f9103521b33bc424c9b79659fac2e4b9deb0fe8754f0842546b51403181032b6c7a05116adfc4f2b8fd599c3ad6ed

Download Submit
memory/888-9-0x00007FFA88830000-0x00007FFA892F1000-memory.dmp

Filesize
10.8MB

Download
memory/888-11-0x00007FFA88830000-0x00007FFA892F1000-memory.dmp

Filesize
10.8MB

Download
memory/888-13-0x000000001DA10000-0x000000001DAC2000-memory.dmp

Filesize
712KB

Download
memory/888-12-0x0000000002DB0000-0x0000000002E00000-memory.dmp

Filesize
320KB

Download
memory/888-14-0x00007FFA88830000-0x00007FFA892F1000-memory.dmp

Filesize
10.8MB

Download
memory/3508-0-0x00007FFA88833000-0x00007FFA88835000-memory.dmp

Filesize
8KB

Download
memory/3508-1-0x0000000000DB0000-0x00000000010D4000-memory.dmp

Filesize
3.1MB

Download
memory/3508-2-0x00007FFA88830000-0x00007FFA892F1000-memory.dmp

Filesize
10.8MB

Download
memory/3508-10-0x00007FFA88830000-0x00007FFA892F1000-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