quasar | ceeca3a0c28712758aaf14261e0212ca59a5341ceef72b8cb7b9194c0cac8b96

General

Target

Solara setup(disable anti virrus if not working).exe
Size

3.1MB
MD5

b54af7138ea30f052019271154f2cf27
SHA1

60abf1be2c5bc3ba182bc04da0ccda264d8b2e82
SHA256

ceeca3a0c28712758aaf14261e0212ca59a5341ceef72b8cb7b9194c0cac8b96
SHA512

21fd18a92bdba7f23e81ff5266198579b8f9bf0991c15ee64fdcdecb84ca625fddbdeac55a394d79c6b9019d8e87b32c87d7d22ac474133df2f3a5c813347bf8
SSDEEP

49152:WvHt62XlaSFNWPjljiFa2RoUYIlkRJ6ebR3LoGdFTHHB72eh2NT:WvN62XlaSFNWPjljiFXRoUYIlkRJ6Y

Score

10^/10

quasar victim persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

victim

C2

192.168.0.8:4782

Mutex

57b923c6-9eab-4306-8c4f-85ce7303d6e6

Attributes

encryption_key
DECB09D2F1BE5F9F9292D355A199E899228C4D86
install_name
Client.exe
log_directory
Logs
reconnect_delay
100
startup_key
Client Startup
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/3040-1-0x00000000012E0000-0x0000000001604000-memory.dmp	family_quasar
behavioral1/files/0x001200000001626d-6.dat	family_quasar
behavioral1/memory/2792-9-0x0000000000930000-0x0000000000C54000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2792	Client.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\ Client Startup = "\"C:\\Program Files\\SubDir\\Client.exe\""	Solara setup(disable anti virrus if not working).exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\ Client Startup = "\"C:\\Program Files\\SubDir\\Client.exe\""	Client.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\SubDir	Client.exe
File created	C:\Program Files\SubDir\Client.exe	Solara setup(disable anti virrus if not working).exe
File opened for modification	C:\Program Files\SubDir\Client.exe	Solara setup(disable anti virrus if not working).exe
File opened for modification	C:\Program Files\SubDir	Solara setup(disable anti virrus if not working).exe
File opened for modification	C:\Program Files\SubDir\Client.exe	Client.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
2744	schtasks.exe
1508	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3040	Solara setup(disable anti virrus if not working).exe
Token: SeDebugPrivilege	2792	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2792	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2744	3040	Solara setup(disable anti virrus if not working).exe	30
PID 3040 wrote to memory of 2744	3040	Solara setup(disable anti virrus if not working).exe	30
PID 3040 wrote to memory of 2744	3040	Solara setup(disable anti virrus if not working).exe	30
PID 3040 wrote to memory of 2792	3040	Solara setup(disable anti virrus if not working).exe	32
PID 3040 wrote to memory of 2792	3040	Solara setup(disable anti virrus if not working).exe	32
PID 3040 wrote to memory of 2792	3040	Solara setup(disable anti virrus if not working).exe	32
PID 2792 wrote to memory of 1508	2792	Client.exe	33
PID 2792 wrote to memory of 1508	2792	Client.exe	33
PID 2792 wrote to memory of 1508	2792	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\Solara setup(disable anti virrus if not working).exe
"C:\Users\Admin\AppData\Local\Temp\Solara setup(disable anti virrus if not working).exe"
1⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn " Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2744
- C:\Program Files\SubDir\Client.exe
  "C:\Program Files\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn " Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1508

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:\Program Files\SubDir\Client.exe

Filesize
3.1MB

MD5
b54af7138ea30f052019271154f2cf27

SHA1
60abf1be2c5bc3ba182bc04da0ccda264d8b2e82

SHA256
ceeca3a0c28712758aaf14261e0212ca59a5341ceef72b8cb7b9194c0cac8b96

SHA512
21fd18a92bdba7f23e81ff5266198579b8f9bf0991c15ee64fdcdecb84ca625fddbdeac55a394d79c6b9019d8e87b32c87d7d22ac474133df2f3a5c813347bf8

Download Submit
memory/2792-9-0x0000000000930000-0x0000000000C54000-memory.dmp

Filesize
3.1MB

Download
memory/2792-11-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2792-10-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2792-12-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/3040-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/3040-1-0x00000000012E0000-0x0000000001604000-memory.dmp

Filesize
3.1MB

Download
memory/3040-2-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/3040-8-0x000007FEF5EB0000-0x000007FEF689C000-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