quasar | a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6

Analysis

max time kernel
14s
max time network
20s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
23-06-2024 19:01

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

KR6nDu9fLhop1bFe.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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3008-1-0x0000000000D00000-0x0000000001024000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	family_quasar
behavioral1/memory/2600-9-0x00000000002E0000-0x0000000000604000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

2600 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

2152 schtasks.exe
2700 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

KR6nDu9fLhop1bFe.exeKR6nDu9fLhop1bFe.exe

description pid process

Token: SeDebugPrivilege 3008 KR6nDu9fLhop1bFe.exe
Token: SeDebugPrivilege 2600 KR6nDu9fLhop1bFe.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

2600 KR6nDu9fLhop1bFe.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

2600 KR6nDu9fLhop1bFe.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

2600 KR6nDu9fLhop1bFe.exe

pid	process
2600	KR6nDu9fLhop1bFe.exe

pid	process
2152	schtasks.exe
2700	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3008	KR6nDu9fLhop1bFe.exe
Token: SeDebugPrivilege	2600	KR6nDu9fLhop1bFe.exe

pid	process
2600	KR6nDu9fLhop1bFe.exe

pid	process
2600	KR6nDu9fLhop1bFe.exe

pid	process
2600	KR6nDu9fLhop1bFe.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

KR6nDu9fLhop1bFe.exeKR6nDu9fLhop1bFe.exe

description	pid	process	target process
PID 3008 wrote to memory of 2152	3008	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 3008 wrote to memory of 2152	3008	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 3008 wrote to memory of 2152	3008	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 3008 wrote to memory of 2600	3008	KR6nDu9fLhop1bFe.exe	KR6nDu9fLhop1bFe.exe
PID 3008 wrote to memory of 2600	3008	KR6nDu9fLhop1bFe.exe	KR6nDu9fLhop1bFe.exe
PID 3008 wrote to memory of 2600	3008	KR6nDu9fLhop1bFe.exe	KR6nDu9fLhop1bFe.exe
PID 2600 wrote to memory of 2700	2600	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 2600 wrote to memory of 2700	2600	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 2600 wrote to memory of 2700	2600	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\KR6nDu9fLhop1bFe.exe
"C:\Users\Admin\AppData\Local\Temp\KR6nDu9fLhop1bFe.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3008

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:2152

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:2600

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:2700

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads

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

MD5
3a52e34c074990eee6ed67e3237c4c9c

SHA1
b7df84535c4d8002cdd7675866617cf9884455c6

SHA256
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6

SHA512
1553aa7e90b404f715c9b025937da6a4941fd287de9a69afe52e970731c48b3a6e62ae898a4e16164fa57e20183ff86999b37c7ff9c9f77fa0a85bce3916b19c

Download Submit
memory/2600-9-0x00000000002E0000-0x0000000000604000-memory.dmp

Filesize
3.1MB

Download
memory/2600-8-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2600-11-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/3008-0-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

Filesize
4KB

Download
memory/3008-1-0x0000000000D00000-0x0000000001024000-memory.dmp

Filesize
3.1MB

Download
memory/3008-2-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/3008-10-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download