quasar | dbd77fcf6dbd2f136713cfe6b28d7f79d1f5f9cdbb77b4431d3c1f5ed9a487a2

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
25-12-2024 19:03

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General

Target

clienbt.exe
Size

3.1MB
MD5

94f7204cc10fd667deb7368911210228
SHA1

93c8e0d5b2194b1ae39537bfd3fe8ebd687c2e23
SHA256

dbd77fcf6dbd2f136713cfe6b28d7f79d1f5f9cdbb77b4431d3c1f5ed9a487a2
SHA512

1724176ea2e394f829b78db21831481696ee612c4bea3daba4c4e86ddd3e3dc6de1a77a901ed28e416f9869a135bf0f18d705fea650c177cb0160eccf5a4f2d0
SSDEEP

49152:nvwhBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkaf7zboGdOTHHB72eh2NT:nvit2d5aKCuVPzlEmVQ0wvwff7H

Score

10^/10

quasar minecraft_updater spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

minecraft_updater

192.168.7.110:631

Mutex

182d06ff-972f-4a96-b344-59a01694d374

Attributes

encryption_key
C5904FDD788EA00F921C538B9FE80C0B0A0DE728
install_name
MinecraftUpdater.exe
log_directory
Logs
reconnect_delay
3000
startup_key
MinecraftUpdater
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/904-1-0x0000000000E60000-0x0000000001184000-memory.dmp	family_quasar
behavioral2/files/0x001b00000002ab7c-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3920	MinecraftUpdater.exe

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
4576	schtasks.exe
1460	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	904	clienbt.exe
Token: SeDebugPrivilege	3920	MinecraftUpdater.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3920	MinecraftUpdater.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 4576	904	clienbt.exe	77
PID 904 wrote to memory of 4576	904	clienbt.exe	77
PID 904 wrote to memory of 3920	904	clienbt.exe	79
PID 904 wrote to memory of 3920	904	clienbt.exe	79
PID 3920 wrote to memory of 1460	3920	MinecraftUpdater.exe	80
PID 3920 wrote to memory of 1460	3920	MinecraftUpdater.exe	80

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\clienbt.exe
"C:\Users\Admin\AppData\Local\Temp\clienbt.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:904
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "MinecraftUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MinecraftUpdater.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4576
- C:\Users\Admin\AppData\Roaming\SubDir\MinecraftUpdater.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\MinecraftUpdater.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3920
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "MinecraftUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MinecraftUpdater.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1460

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
94f7204cc10fd667deb7368911210228

SHA1
93c8e0d5b2194b1ae39537bfd3fe8ebd687c2e23

SHA256
dbd77fcf6dbd2f136713cfe6b28d7f79d1f5f9cdbb77b4431d3c1f5ed9a487a2

SHA512
1724176ea2e394f829b78db21831481696ee612c4bea3daba4c4e86ddd3e3dc6de1a77a901ed28e416f9869a135bf0f18d705fea650c177cb0160eccf5a4f2d0

Download Submit
memory/904-0-0x00007FFA94BD3000-0x00007FFA94BD5000-memory.dmp

Filesize
8KB

Download
memory/904-1-0x0000000000E60000-0x0000000001184000-memory.dmp

Filesize
3.1MB

Download
memory/904-2-0x00007FFA94BD0000-0x00007FFA95692000-memory.dmp

Filesize
10.8MB

Download
memory/904-9-0x00007FFA94BD0000-0x00007FFA95692000-memory.dmp

Filesize
10.8MB

Download
memory/3920-10-0x00007FFA94BD0000-0x00007FFA95692000-memory.dmp

Filesize
10.8MB

Download
memory/3920-11-0x00007FFA94BD0000-0x00007FFA95692000-memory.dmp

Filesize
10.8MB

Download
memory/3920-12-0x000000001B500000-0x000000001B550000-memory.dmp

Filesize
320KB

Download
memory/3920-13-0x000000001BE60000-0x000000001BF12000-memory.dmp

Filesize
712KB

Download
memory/3920-14-0x00007FFA94BD0000-0x00007FFA95692000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads