quasar | 8101bcb9ab9320c0c812fc5b73a04abb20018c7bf5451be56e008e3a053727ab

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2836-1-0x0000000000EB0000-0x00000000011D4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral1/memory/2904-9-0x0000000000A40000-0x0000000000D64000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2904 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 2836 68cfc044a88d5737918a455410ff84cb.exe
Token: SeDebugPrivilege 2904 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

2904 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

2904 Client.exe

pid	process
2904	Client.exe

description	pid	process
Token: SeDebugPrivilege	2836	68cfc044a88d5737918a455410ff84cb.exe
Token: SeDebugPrivilege	2904	Client.exe

pid	process
2904	Client.exe

pid	process
2904	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

68cfc044a88d5737918a455410ff84cb.exe

description	pid	process	target process
PID 2836 wrote to memory of 2904	2836	68cfc044a88d5737918a455410ff84cb.exe	Client.exe
PID 2836 wrote to memory of 2904	2836	68cfc044a88d5737918a455410ff84cb.exe	Client.exe
PID 2836 wrote to memory of 2904	2836	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:2836

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:2904

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/2836-0-0x000007FEF5AF3000-0x000007FEF5AF4000-memory.dmp

Filesize
4KB

Download
memory/2836-1-0x0000000000EB0000-0x00000000011D4000-memory.dmp

Filesize
3.1MB

Download
memory/2836-2-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

Filesize
9.9MB

Download
memory/2836-7-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

Filesize
9.9MB

Download
memory/2904-9-0x0000000000A40000-0x0000000000D64000-memory.dmp

Filesize
3.1MB

Download
memory/2904-8-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

Filesize
9.9MB

Download
memory/2904-10-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

Filesize
9.9MB

Download
memory/2904-11-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

Filesize
9.9MB

Download