quasar | cf95927605e9b7230e921caf5f16a2156e89ba825a5fd8ed3e810871ed203589

Analysis

max time kernel
32s
max time network
46s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
04-02-2025 00:01

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General

Target

generator.exe
Size

3.1MB
MD5

47eceb1c646cad2bfb2b4d38a42cec11
SHA1

a946a09e81f81c687f4e9862c37a4b29aad7d8c2
SHA256

cf95927605e9b7230e921caf5f16a2156e89ba825a5fd8ed3e810871ed203589
SHA512

18ccc94522287ff97562fea6fa32346ff101b9d8da8a90c6bf1e66c0dcdff208967b7b0cfa579534dc6ea54343c4f43488df0b8cc003752f87bba129925f25f7
SSDEEP

49152:Hv+I22SsaNYfdPBldt698dBcjH1zvNhXoGdPTHHB72eh2NT:Hvz22SsaNYfdPBldt6+dBcjH1zvN5

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.145:4782

Mutex

1f5853e7-48da-4942-8523-25d8ea275879

Attributes

encryption_key
F4CE6D33F7B9AE4FA08ABCD067A34357091A0172
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 3 IoCs

resource	yara_rule
behavioral1/memory/1268-1-0x0000000000180000-0x00000000004A4000-memory.dmp	family_quasar
behavioral1/files/0x0030000000019326-6.dat	family_quasar
behavioral1/memory/2964-8-0x0000000000EC0000-0x00000000011E4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2964	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

description	pid	Process
Token: SeDebugPrivilege	1268	generator.exe
Token: SeDebugPrivilege	2964	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2964	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2964	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2964	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1268 wrote to memory of 2964	1268	generator.exe	29
PID 1268 wrote to memory of 2964	1268	generator.exe	29
PID 1268 wrote to memory of 2964	1268	generator.exe	29

C:\Users\Admin\AppData\Local\Temp\generator.exe
"C:\Users\Admin\AppData\Local\Temp\generator.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1268
- 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
  - Suspicious use of SetWindowsHookEx
  PID:2964

Network

MITRE ATT&CK Enterprise v15

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

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
47eceb1c646cad2bfb2b4d38a42cec11

SHA1
a946a09e81f81c687f4e9862c37a4b29aad7d8c2

SHA256
cf95927605e9b7230e921caf5f16a2156e89ba825a5fd8ed3e810871ed203589

SHA512
18ccc94522287ff97562fea6fa32346ff101b9d8da8a90c6bf1e66c0dcdff208967b7b0cfa579534dc6ea54343c4f43488df0b8cc003752f87bba129925f25f7

Download Submit
memory/1268-0-0x000007FEF6253000-0x000007FEF6254000-memory.dmp

Filesize
4KB

Download
memory/1268-1-0x0000000000180000-0x00000000004A4000-memory.dmp

Filesize
3.1MB

Download
memory/1268-2-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/1268-11-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2964-9-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2964-8-0x0000000000EC0000-0x00000000011E4000-memory.dmp

Filesize
3.1MB

Download
memory/2964-10-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2964-12-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download