quasar | a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6

Analysis

max time kernel
140s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
23-06-2024 19:02

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General

Target

a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe
Size

3.1MB
MD5

3a52e34c074990eee6ed67e3237c4c9c
SHA1

b7df84535c4d8002cdd7675866617cf9884455c6
SHA256

a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6
SHA512

1553aa7e90b404f715c9b025937da6a4941fd287de9a69afe52e970731c48b3a6e62ae898a4e16164fa57e20183ff86999b37c7ff9c9f77fa0a85bce3916b19c
SSDEEP

49152:MvHI22SsaNYfdPBldt698dBcjHuZvgGoGnVvTHHB72eh2NT:Mvo22SsaNYfdPBldt6+dBcjHuZvF

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

94.228.166.40:4782

Mutex

172a89d7-b9b2-4d82-b5ed-6beb5326f544

Attributes

encryption_key
7970C2029EDBB83E6BD65073BE18684AC9FF3F48
install_name
KR6nDu9fLhop1bFe.exe
log_directory
Logs
reconnect_delay
3000
startup_key
defender.proces
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar payload 2 IoCs

Processes:

resource yara_rule

behavioral1/memory/60-1-0x00000000000B0000-0x00000000003D4000-memory.dmp family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe family_quasar
Executes dropped EXE 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

3728 KR6nDu9fLhop1bFe.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

Processes:

schtasks.exeschtasks.exe

pid process

1008 schtasks.exe
5004 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exeKR6nDu9fLhop1bFe.exe

description pid process

Token: SeDebugPrivilege 60 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe
Token: SeDebugPrivilege 3728 KR6nDu9fLhop1bFe.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

3728 KR6nDu9fLhop1bFe.exe
3728 KR6nDu9fLhop1bFe.exe
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

3728 KR6nDu9fLhop1bFe.exe
3728 KR6nDu9fLhop1bFe.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

3728 KR6nDu9fLhop1bFe.exe

resource	yara_rule
behavioral1/memory/60-1-0x00000000000B0000-0x00000000003D4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	family_quasar

pid	process
3728	KR6nDu9fLhop1bFe.exe

pid	process
1008	schtasks.exe
5004	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	60	a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe
Token: SeDebugPrivilege	3728	KR6nDu9fLhop1bFe.exe

pid	process
3728	KR6nDu9fLhop1bFe.exe
3728	KR6nDu9fLhop1bFe.exe

pid	process
3728	KR6nDu9fLhop1bFe.exe
3728	KR6nDu9fLhop1bFe.exe

pid	process
3728	KR6nDu9fLhop1bFe.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exeKR6nDu9fLhop1bFe.exe

description	pid	process	target process
PID 60 wrote to memory of 1008	60	a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe	schtasks.exe
PID 60 wrote to memory of 1008	60	a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe	schtasks.exe
PID 60 wrote to memory of 3728	60	a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe	KR6nDu9fLhop1bFe.exe
PID 60 wrote to memory of 3728	60	a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe	KR6nDu9fLhop1bFe.exe
PID 3728 wrote to memory of 5004	3728	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 3728 wrote to memory of 5004	3728	KR6nDu9fLhop1bFe.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\a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe
"C:\Users\Admin\AppData\Local\Temp\a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:60

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:1008

C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
"C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.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:3728

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:5004

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
Filesize
3.1MB

MD5
3a52e34c074990eee6ed67e3237c4c9c

SHA1
b7df84535c4d8002cdd7675866617cf9884455c6

SHA256
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6

SHA512
1553aa7e90b404f715c9b025937da6a4941fd287de9a69afe52e970731c48b3a6e62ae898a4e16164fa57e20183ff86999b37c7ff9c9f77fa0a85bce3916b19c

Download Submit
memory/60-0-0x00007FFE2F983000-0x00007FFE2F985000-memory.dmp

Filesize
8KB

Download
memory/60-1-0x00000000000B0000-0x00000000003D4000-memory.dmp

Filesize
3.1MB

Download
memory/60-2-0x00007FFE2F980000-0x00007FFE30441000-memory.dmp

Filesize
10.8MB

Download
memory/60-9-0x00007FFE2F980000-0x00007FFE30441000-memory.dmp

Filesize
10.8MB

Download
memory/3728-10-0x00007FFE2F980000-0x00007FFE30441000-memory.dmp

Filesize
10.8MB

Download
memory/3728-11-0x00007FFE2F980000-0x00007FFE30441000-memory.dmp

Filesize
10.8MB

Download
memory/3728-12-0x000000001C060000-0x000000001C0B0000-memory.dmp

Filesize
320KB

Download
memory/3728-13-0x000000001C170000-0x000000001C222000-memory.dmp

Filesize
712KB

Download
memory/3728-16-0x000000001C0F0000-0x000000001C102000-memory.dmp

Filesize
72KB

Download
memory/3728-17-0x000000001CC70000-0x000000001CCAC000-memory.dmp

Filesize
240KB

Download
memory/3728-18-0x00007FFE2F980000-0x00007FFE30441000-memory.dmp

Filesize
10.8MB

Download