quasar | 5dc04f49cc08036074442e70c96c22fe5fd2f2f0c5d1a051d4cb0a523ca5a8ef

Analysis

max time kernel
96s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-12-2024 18:20

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

56bcee0e020cd6b2722441019e94a3c1
SHA1

f3f7db5152a241e575bf18018d08c2ca75219650
SHA256

5dc04f49cc08036074442e70c96c22fe5fd2f2f0c5d1a051d4cb0a523ca5a8ef
SHA512

d29444d96f74c3584164cb147f83b1957cd9f4412399665df74ae7bbddaba799318f73e5aad120c91ecb64a6d202dd8ff7eff620539626095da5e32b28e4f877
SSDEEP

49152:PvulL26AaNeWgPhlmVqvMQ7XSKTTRJ6bbR3LoGdW4THHB72eh2NT:PveL26AaNeWgPhlmVqkQ7XSKTTRJ6t

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

paris-pixels.gl.at.ply.gg:14754

Mutex

bdf966fd-92ab-4536-9c2b-6e6c94f99130

Attributes

encryption_key
95DD5E4EAA3DC0591E2F7A87C78A608435400057
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
some 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/2756-1-0x0000000000A00000-0x0000000000D24000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b78-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3472	Client.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4952	schtasks.exe
2672	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2756	Client-built.exe
Token: SeDebugPrivilege	3472	Client.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3472	Client.exe
3472	Client.exe
3472	Client.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3472	Client.exe
3472	Client.exe
3472	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3472	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 4952	2756	Client-built.exe	82
PID 2756 wrote to memory of 4952	2756	Client-built.exe	82
PID 2756 wrote to memory of 3472	2756	Client-built.exe	84
PID 2756 wrote to memory of 3472	2756	Client-built.exe	84
PID 3472 wrote to memory of 2672	3472	Client.exe	85
PID 3472 wrote to memory of 2672	3472	Client.exe	85

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

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:2756
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "some Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4952
- 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
  - Suspicious use of WriteProcessMemory
  PID:3472
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "some Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
3.1MB

MD5
56bcee0e020cd6b2722441019e94a3c1

SHA1
f3f7db5152a241e575bf18018d08c2ca75219650

SHA256
5dc04f49cc08036074442e70c96c22fe5fd2f2f0c5d1a051d4cb0a523ca5a8ef

SHA512
d29444d96f74c3584164cb147f83b1957cd9f4412399665df74ae7bbddaba799318f73e5aad120c91ecb64a6d202dd8ff7eff620539626095da5e32b28e4f877

Download Submit
memory/2756-0-0x00007FFA2F173000-0x00007FFA2F175000-memory.dmp

Filesize
8KB

Download
memory/2756-1-0x0000000000A00000-0x0000000000D24000-memory.dmp

Filesize
3.1MB

Download
memory/2756-2-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/2756-9-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/3472-10-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/3472-11-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/3472-12-0x000000001CB70000-0x000000001CBC0000-memory.dmp

Filesize
320KB

Download
memory/3472-13-0x000000001CC80000-0x000000001CD32000-memory.dmp

Filesize
712KB

Download
memory/3472-16-0x000000001CC00000-0x000000001CC12000-memory.dmp

Filesize
72KB

Download
memory/3472-17-0x000000001D880000-0x000000001D8BC000-memory.dmp

Filesize
240KB

Download
memory/3472-18-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads