quasar | 57da36748503ef806ae7bc812dc416dea9d97747dc50749d61fa7f835b85db1e

Analysis

max time kernel
126s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-12-2024 00:04

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General

Target

Client-built.exe
Size

3.1MB
MD5

3da9b1a1a9bc8d62b14a16f61d9b0d79
SHA1

7a83070e35994f8ec7afed51577df75ba1bbfdb0
SHA256

57da36748503ef806ae7bc812dc416dea9d97747dc50749d61fa7f835b85db1e
SHA512

e83e0742c0ec0da2be36ecf81072891ba4e4f22f5f8fb10d73534250db63c8233678c0c0d1980960f4f05997476da1135e0427270c512f7c5f8e848263004a03
SSDEEP

49152:DvnI22SsaNYfdPBldt698dBcjHU9RJ6ibR3LoGdJTHHB72eh2NT:DvI22SsaNYfdPBldt6+dBcjHU9RJ6c

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.41:4782

Mutex

68c72d56-7c01-4752-8b16-99645c1898fc

Attributes

encryption_key
6A865538EA2172CEA230F0158FFB3F9E7FC36141
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 2 IoCs

resource	yara_rule
behavioral2/memory/4116-1-0x00000000003D0000-0x00000000006F4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b91-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4756	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	4116	Client-built.exe
Token: SeDebugPrivilege	4756	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4756	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4756	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4756	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4116 wrote to memory of 4756	4116	Client-built.exe	83
PID 4116 wrote to memory of 4756	4116	Client-built.exe	83

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4116
- 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:4756

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

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
3da9b1a1a9bc8d62b14a16f61d9b0d79

SHA1
7a83070e35994f8ec7afed51577df75ba1bbfdb0

SHA256
57da36748503ef806ae7bc812dc416dea9d97747dc50749d61fa7f835b85db1e

SHA512
e83e0742c0ec0da2be36ecf81072891ba4e4f22f5f8fb10d73534250db63c8233678c0c0d1980960f4f05997476da1135e0427270c512f7c5f8e848263004a03

Download Submit
memory/4116-0-0x00007FFA3CB73000-0x00007FFA3CB75000-memory.dmp

Filesize
8KB

Download
memory/4116-1-0x00000000003D0000-0x00000000006F4000-memory.dmp

Filesize
3.1MB

Download
memory/4116-2-0x00007FFA3CB70000-0x00007FFA3D631000-memory.dmp

Filesize
10.8MB

Download
memory/4116-8-0x00007FFA3CB70000-0x00007FFA3D631000-memory.dmp

Filesize
10.8MB

Download
memory/4756-9-0x00007FFA3CB70000-0x00007FFA3D631000-memory.dmp

Filesize
10.8MB

Download
memory/4756-10-0x00007FFA3CB70000-0x00007FFA3D631000-memory.dmp

Filesize
10.8MB

Download
memory/4756-11-0x000000001C2E0000-0x000000001C330000-memory.dmp

Filesize
320KB

Download
memory/4756-12-0x000000001C3F0000-0x000000001C4A2000-memory.dmp

Filesize
712KB

Download
memory/4756-13-0x00007FFA3CB70000-0x00007FFA3D631000-memory.dmp

Filesize
10.8MB

Download