quasar | bfb28a852b12a795fb4d21fbe2b2f4c56e9742cbeace1cf9564b97bda1d08e55

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 04:27

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General

Target

Bootstrapper.exe
Size

3.1MB
MD5

972d7bcd3eb4daaa0ef69215d91e41d9
SHA1

d3bcc25f8585405642a113ae6bae503648a765a2
SHA256

bfb28a852b12a795fb4d21fbe2b2f4c56e9742cbeace1cf9564b97bda1d08e55
SHA512

17433b55a5f0f61b0db42e22f975c4fa96298bc79a7a15b34d5342057bbf97a5229b23a7a12cc4a02afb48e485a2ae4ff05892b132ef19d145f2997814885cf0
SSDEEP

49152:bvblL26AaNeWgPhlmVqvMQ7XSKjBOEEqk7k/8FFoGdRnggTHHB72eh2NT:bvBL26AaNeWgPhlmVqkQ7XSKjBOjT

Score

10^/10

quasar rat client spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

rat client

AMNSALKSamongus-47679.portmap.host:4782

Mutex

d3bc3858-ff4a-4aa8-97ec-67721ddcdeeb

Attributes

encryption_key
C8D618C9B5D2F91FFC94B6E9C868ECF80EB774F8
install_name
Client.exe
log_directory
ratted client
reconnect_delay
3000
startup_key
RedTiger Tool v6.1
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/4380-1-0x00000000000F0000-0x0000000000414000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb6-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4700	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
1008	schtasks.exe
2800	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4380	Bootstrapper.exe
Token: SeDebugPrivilege	4700	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4700	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4700	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4700	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 1008	4380	Bootstrapper.exe	82
PID 4380 wrote to memory of 1008	4380	Bootstrapper.exe	82
PID 4380 wrote to memory of 4700	4380	Bootstrapper.exe	84
PID 4380 wrote to memory of 4700	4380	Bootstrapper.exe	84
PID 4700 wrote to memory of 2800	4700	Client.exe	85
PID 4700 wrote to memory of 2800	4700	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\Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RedTiger Tool v6.1" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1008
- 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:4700
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RedTiger Tool v6.1" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2800

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
972d7bcd3eb4daaa0ef69215d91e41d9

SHA1
d3bcc25f8585405642a113ae6bae503648a765a2

SHA256
bfb28a852b12a795fb4d21fbe2b2f4c56e9742cbeace1cf9564b97bda1d08e55

SHA512
17433b55a5f0f61b0db42e22f975c4fa96298bc79a7a15b34d5342057bbf97a5229b23a7a12cc4a02afb48e485a2ae4ff05892b132ef19d145f2997814885cf0

Download Submit
memory/4380-0-0x00007FFC2E373000-0x00007FFC2E375000-memory.dmp

Filesize
8KB

Download
memory/4380-1-0x00000000000F0000-0x0000000000414000-memory.dmp

Filesize
3.1MB

Download
memory/4380-2-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/4380-8-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-9-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-10-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-11-0x000000001DC80000-0x000000001DCD0000-memory.dmp

Filesize
320KB

Download
memory/4700-12-0x000000001DD90000-0x000000001DE42000-memory.dmp

Filesize
712KB

Download
memory/4700-13-0x00007FFC2E370000-0x00007FFC2EE31000-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