quasar | ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d

General

Target

a.exe
Size

3.1MB
MD5

cc3ea796575dfcf9944dc2b100b88030
SHA1

1af5febda7a5380c9be9b56d9552b38427a1b3a4
SHA256

ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d
SHA512

3c97296a50022b5d8ff7ab1811521d1da02a47691197ea1fb3a61160c02f19658f051216bcd81bbaf6e4929a9643e96451febdcc34e4d4c85430fb3572f964aa
SSDEEP

49152:uv0t62XlaSFNWPjljiFa2RoUYIFxPEak5k/LCtoGdNTHHB72eh2NT:uvo62XlaSFNWPjljiFXRoUYIFxbo

Score

10^/10

quasar 1st spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

1st

C2

172.234.16.71:4444

Mutex

0af47b97-43c7-4ab0-95a1-8d9a9a8f797f

Attributes

encryption_key
B60DF71C950D2BE72D00A583D2E2E6202680FD45
install_name
Client.exe
log_directory
Logs
reconnect_delay
10
startup_key
gg
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4656-0-0x0000000000860000-0x0000000000B84000-memory.dmp	family_quasar
C:\Windows\System32\SubDir\Client.exe	family_quasar
C:\Windows\system32\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

3816 Client.exe
Drops file in System32 directory 2 IoCs

Processes:

a.exe

description ioc process

File created C:\Windows\system32\SubDir\Client.exe a.exe
File opened for modification C:\Windows\system32\SubDir\Client.exe a.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

932 schtasks.exe
3048 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

a.exeClient.exe

description pid process

Token: SeDebugPrivilege 4656 a.exe
Token: SeDebugPrivilege 3816 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

3816 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

3816 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

3816 Client.exe

pid	process
3816	Client.exe

description	ioc	process
File created	C:\Windows\system32\SubDir\Client.exe	a.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	a.exe

pid	process
932	schtasks.exe
3048	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4656	a.exe
Token: SeDebugPrivilege	3816	Client.exe

pid	process
3816	Client.exe

pid	process
3816	Client.exe

pid	process
3816	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

a.exeClient.exe

description	pid	process	target process
PID 4656 wrote to memory of 932	4656	a.exe	schtasks.exe
PID 4656 wrote to memory of 932	4656	a.exe	schtasks.exe
PID 4656 wrote to memory of 3816	4656	a.exe	Client.exe
PID 4656 wrote to memory of 3816	4656	a.exe	Client.exe
PID 3816 wrote to memory of 3048	3816	Client.exe	schtasks.exe
PID 3816 wrote to memory of 3048	3816	Client.exe	schtasks.exe

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\a.exe
"C:\Users\Admin\AppData\Local\Temp\a.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4656

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "gg" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:932

C:\Windows\system32\SubDir\Client.exe
"C:\Windows\system32\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:3816

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "gg" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:3048

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\System32\SubDir\Client.exe
Filesize
3.1MB

MD5
cc3ea796575dfcf9944dc2b100b88030

SHA1
1af5febda7a5380c9be9b56d9552b38427a1b3a4

SHA256
ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d

SHA512
3c97296a50022b5d8ff7ab1811521d1da02a47691197ea1fb3a61160c02f19658f051216bcd81bbaf6e4929a9643e96451febdcc34e4d4c85430fb3572f964aa

Download Submit
C:\Windows\system32\SubDir\Client.exe
Filesize
3.1MB

MD5
cc3ea796575dfcf9944dc2b100b88030

SHA1
1af5febda7a5380c9be9b56d9552b38427a1b3a4

SHA256
ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d

SHA512
3c97296a50022b5d8ff7ab1811521d1da02a47691197ea1fb3a61160c02f19658f051216bcd81bbaf6e4929a9643e96451febdcc34e4d4c85430fb3572f964aa

Download Submit
memory/3816-9-0x00007FFB76B40000-0x00007FFB77601000-memory.dmp

Filesize
10.8MB

Download
memory/3816-10-0x000000001AF60000-0x000000001AF70000-memory.dmp

Filesize
64KB

Download
memory/3816-11-0x000000001BC80000-0x000000001BCD0000-memory.dmp

Filesize
320KB

Download
memory/3816-12-0x000000001BD90000-0x000000001BE42000-memory.dmp

Filesize
712KB

Download
memory/3816-13-0x00007FFB76B40000-0x00007FFB77601000-memory.dmp

Filesize
10.8MB

Download
memory/3816-14-0x000000001AF60000-0x000000001AF70000-memory.dmp

Filesize
64KB

Download
memory/4656-0-0x0000000000860000-0x0000000000B84000-memory.dmp

Filesize
3.1MB

Download
memory/4656-1-0x00007FFB76B40000-0x00007FFB77601000-memory.dmp

Filesize
10.8MB

Download
memory/4656-2-0x000000001B810000-0x000000001B820000-memory.dmp

Filesize
64KB

Download
memory/4656-8-0x00007FFB76B40000-0x00007FFB77601000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads