quasar | 8101bcb9ab9320c0c812fc5b73a04abb20018c7bf5451be56e008e3a053727ab

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 02:04

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General

Target

68cfc044a88d5737918a455410ff84cb.exe
Size

3.1MB
MD5

68cfc044a88d5737918a455410ff84cb
SHA1

1c1d434ec87174709a5ade5d3373fa2381bfcc6b
SHA256

8101bcb9ab9320c0c812fc5b73a04abb20018c7bf5451be56e008e3a053727ab
SHA512

8a6a2a24cd651e7f90c7432b14426420d583fa5ba3a0f8434b7a4d244f33382064e05ada04b36fa064ac3bf5b9521e076269e8d7604a49367b659705b9db98f5
SSDEEP

49152:PvOI22SsaNYfdPBldt698dBcjHUC61JwLoGdRkzTHHB72eh2NT:Pvj22SsaNYfdPBldt6+dBcjHUCrB

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

147.185.221.19:33365

Mutex

ba5220e2-c4e8-4381-aad8-a85115ef955e

Attributes

encryption_key
67C139F3E9A16FF8132A3DCF42197B8BA3C38609
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Processes:

resource yara_rule

behavioral2/memory/1588-1-0x0000000000240000-0x0000000000564000-memory.dmp family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe family_quasar
Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

3784 Client.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

68cfc044a88d5737918a455410ff84cb.exeClient.exe

description pid process

Token: SeDebugPrivilege 1588 68cfc044a88d5737918a455410ff84cb.exe
Token: SeDebugPrivilege 3784 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

3784 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

3784 Client.exe

resource	yara_rule
behavioral2/memory/1588-1-0x0000000000240000-0x0000000000564000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

pid	process
3784	Client.exe

description	pid	process
Token: SeDebugPrivilege	1588	68cfc044a88d5737918a455410ff84cb.exe
Token: SeDebugPrivilege	3784	Client.exe

pid	process
3784	Client.exe

pid	process
3784	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

68cfc044a88d5737918a455410ff84cb.exe

description	pid	process	target process
PID 1588 wrote to memory of 3784	1588	68cfc044a88d5737918a455410ff84cb.exe	Client.exe
PID 1588 wrote to memory of 3784	1588	68cfc044a88d5737918a455410ff84cb.exe	Client.exe

C:\Users\Admin\AppData\Local\Temp\68cfc044a88d5737918a455410ff84cb.exe
"C:\Users\Admin\AppData\Local\Temp\68cfc044a88d5737918a455410ff84cb.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1588

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:3784

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

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

MD5
68cfc044a88d5737918a455410ff84cb

SHA1
1c1d434ec87174709a5ade5d3373fa2381bfcc6b

SHA256
8101bcb9ab9320c0c812fc5b73a04abb20018c7bf5451be56e008e3a053727ab

SHA512
8a6a2a24cd651e7f90c7432b14426420d583fa5ba3a0f8434b7a4d244f33382064e05ada04b36fa064ac3bf5b9521e076269e8d7604a49367b659705b9db98f5

Download Submit
memory/1588-0-0x00007FF94A5B3000-0x00007FF94A5B5000-memory.dmp

Filesize
8KB

Download
memory/1588-1-0x0000000000240000-0x0000000000564000-memory.dmp

Filesize
3.1MB

Download
memory/1588-2-0x00007FF94A5B0000-0x00007FF94B071000-memory.dmp

Filesize
10.8MB

Download
memory/1588-9-0x00007FF94A5B0000-0x00007FF94B071000-memory.dmp

Filesize
10.8MB

Download
memory/3784-8-0x00007FF94A5B0000-0x00007FF94B071000-memory.dmp

Filesize
10.8MB

Download
memory/3784-10-0x00007FF94A5B0000-0x00007FF94B071000-memory.dmp

Filesize
10.8MB

Download
memory/3784-11-0x000000001C950000-0x000000001C9A0000-memory.dmp

Filesize
320KB

Download
memory/3784-12-0x000000001CA60000-0x000000001CB12000-memory.dmp

Filesize
712KB

Download
memory/3784-13-0x00007FF94A5B0000-0x00007FF94B071000-memory.dmp

Filesize
10.8MB

Download
memory/3784-14-0x00007FF94A5B0000-0x00007FF94B071000-memory.dmp

Filesize
10.8MB

Download