quasar | 4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Resubmissions

14/04/2025, 07:51

250414-jp1kfssjz9 10

14/04/2025, 07:46

250414-jl9nyssjt9 10

08/04/2025, 15:58

250408-tevasswl18 10

08/04/2025, 14:19

250408-rm2nqsvqw2 10

Analysis

max time kernel
896s
max time network
437s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2025, 15:58

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Report Analysis Logs

General

Target

fa0d8e0c80c4d5be75d4ff442d6a85ea4750bffb3526d4d2d3b2e03f3ccfb28e.exe
Size

3.1MB
MD5

0284698569314699a47d0ed2411da31d
SHA1

2013c6c44d36797c516eaefcda085494fb5595ac
SHA256

fa0d8e0c80c4d5be75d4ff442d6a85ea4750bffb3526d4d2d3b2e03f3ccfb28e
SHA512

f9d4ad9c5959680cae1b648f970fc9c7dff71731d825bf5522d658ac02ea62764dbe149b4f5360daf0200f3bd7c09885dc3de32ef6c5cdc112b82f491ff5a839
SSDEEP

49152:yvlt62XlaSFNWPjljiFa2RoUYIm5RJ6sbR3LoGdD1sTHHB72eh2NT:yvX62XlaSFNWPjljiFXRoUYIm5RJ62

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

127.0.0.1:4782

Mutex

64815557-7ace-4e24-8254-b4bfa76c68d0

Attributes

encryption_key
4C4CF51A01784F79888EFBAF8D36D0C89B0CFD16
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 family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral31/memory/4172-1-0x0000000000A90000-0x0000000000DB4000-memory.dmp	family_quasar

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4172	fa0d8e0c80c4d5be75d4ff442d6a85ea4750bffb3526d4d2d3b2e03f3ccfb28e.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4172	fa0d8e0c80c4d5be75d4ff442d6a85ea4750bffb3526d4d2d3b2e03f3ccfb28e.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4172	fa0d8e0c80c4d5be75d4ff442d6a85ea4750bffb3526d4d2d3b2e03f3ccfb28e.exe

C:\Users\Admin\AppData\Local\Temp\fa0d8e0c80c4d5be75d4ff442d6a85ea4750bffb3526d4d2d3b2e03f3ccfb28e.exe
"C:\Users\Admin\AppData\Local\Temp\fa0d8e0c80c4d5be75d4ff442d6a85ea4750bffb3526d4d2d3b2e03f3ccfb28e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4172

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4172-0-0x00007FFAE4933000-0x00007FFAE4935000-memory.dmp

Filesize
8KB

Download
memory/4172-1-0x0000000000A90000-0x0000000000DB4000-memory.dmp

Filesize
3.1MB

Download
memory/4172-2-0x00007FFAE4930000-0x00007FFAE53F1000-memory.dmp

Filesize
10.8MB

Download
memory/4172-3-0x000000001C7F0000-0x000000001C840000-memory.dmp

Filesize
320KB

Download
memory/4172-4-0x000000001C900000-0x000000001C9B2000-memory.dmp

Filesize
712KB

Download
memory/4172-5-0x00007FFAE4933000-0x00007FFAE4935000-memory.dmp

Filesize
8KB

Download
memory/4172-6-0x00007FFAE4930000-0x00007FFAE53F1000-memory.dmp

Filesize
10.8MB

Download