quasar | b7c453f42f905823c106e6348871c9ad4b78e04e8bff7c3315d784797275687f

Analysis

max time kernel
31s
max time network
31s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
11-08-2024 04:08

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General

Target

test.exe
Size

3.1MB
MD5

ec2648334be2e631b82b1382a8940603
SHA1

12403c9ce6e026583d74ebf9a81b208103060bce
SHA256

b7c453f42f905823c106e6348871c9ad4b78e04e8bff7c3315d784797275687f
SHA512

eeb57f3af0b498e581c4c5704e6cf7603cbab4b754320717225394aa215a5575f1015de8831725a2da2f5d3dee7ac3499efae728a5082c25d7dd268d30558787
SSDEEP

49152:Pvht62XlaSFNWPjljiFa2RoUYIFlxNESEKk/i1LoGdfqXlTHHB72eh2NT:PvL62XlaSFNWPjljiFXRoUYIfxhNyX

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.2.51:65535

Mutex

196fbb22-4fc3-4d2e-9e30-bd3ff8496cbf

Attributes

encryption_key
62C0EDEB268B3897916B9C300A334C032152A1EA
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Python Updater
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/4588-1-0x0000000000270000-0x0000000000594000-memory.dmp	family_quasar
behavioral2/files/0x000700000002350f-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3076	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
1384	schtasks.exe
1236	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4588	test.exe
Token: SeDebugPrivilege	3076	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3076	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3076	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3076	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4588 wrote to memory of 1384	4588	test.exe	89
PID 4588 wrote to memory of 1384	4588	test.exe	89
PID 4588 wrote to memory of 3076	4588	test.exe	91
PID 4588 wrote to memory of 3076	4588	test.exe	91
PID 3076 wrote to memory of 1236	3076	Client.exe	93
PID 3076 wrote to memory of 1236	3076	Client.exe	93

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\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4588
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Python Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1384
- 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:3076
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Python Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1236

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

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Downloads

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

Filesize
3.1MB

MD5
ec2648334be2e631b82b1382a8940603

SHA1
12403c9ce6e026583d74ebf9a81b208103060bce

SHA256
b7c453f42f905823c106e6348871c9ad4b78e04e8bff7c3315d784797275687f

SHA512
eeb57f3af0b498e581c4c5704e6cf7603cbab4b754320717225394aa215a5575f1015de8831725a2da2f5d3dee7ac3499efae728a5082c25d7dd268d30558787

Download Submit
memory/3076-9-0x00007FFBAA3D0000-0x00007FFBAAE91000-memory.dmp

Filesize
10.8MB

Download
memory/3076-11-0x00007FFBAA3D0000-0x00007FFBAAE91000-memory.dmp

Filesize
10.8MB

Download
memory/3076-12-0x000000001C6C0000-0x000000001C710000-memory.dmp

Filesize
320KB

Download
memory/3076-13-0x000000001C7D0000-0x000000001C882000-memory.dmp

Filesize
712KB

Download
memory/3076-14-0x00007FFBAA3D0000-0x00007FFBAAE91000-memory.dmp

Filesize
10.8MB

Download
memory/4588-1-0x0000000000270000-0x0000000000594000-memory.dmp

Filesize
3.1MB

Download
memory/4588-0-0x00007FFBAA3D3000-0x00007FFBAA3D5000-memory.dmp

Filesize
8KB

Download
memory/4588-2-0x00007FFBAA3D0000-0x00007FFBAAE91000-memory.dmp

Filesize
10.8MB

Download
memory/4588-10-0x00007FFBAA3D0000-0x00007FFBAAE91000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads