quasar | 3d8d2e7e8d205f96165c848b68671b13fc419ae0429a6079999344a925f44d41 | Triage

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 19:08

Sharing

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General

Target

hopefully working.exe
Size

3.1MB
MD5

d99ad666c46f6027182170b415628651
SHA1

95e57ce111b72ea7b062e3d87165416eb6ee6141
SHA256

3d8d2e7e8d205f96165c848b68671b13fc419ae0429a6079999344a925f44d41
SHA512

af808083c25b323120bcee39189fc06391a97f54dc11724c33070dfe6bddf32dbd2fef4543a8202eec5d77a7b2d25a76dcb952de48d5c5b81bc0cae8d4bddacc
SSDEEP

49152:HvIcfX2hcawDEhPLl8r/ptXpga584hxOEMkak/Jx3oGdq7sfTHHB72eh2NT:HvBv2hcawDEhPLl8r/XXpga584hx99

Score

10^/10

quasar minecraft_updater spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

minecraft_updater

C2

98.97.12.133:631

98.97.12.133:41685

98.97.12.133:5353

98.97.12.133:34735

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
behavioral3/memory/3920-1-0x00000000009E0000-0x0000000000D04000-memory.dmp	family_quasar
behavioral3/files/0x001a00000002aab9-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4192	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

pid	Process
2316	schtasks.exe
4240	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3920	hopefully working.exe
Token: SeDebugPrivilege	4192	MinecraftUpdater.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4192	MinecraftUpdater.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3920 wrote to memory of 2316	3920	hopefully working.exe	77
PID 3920 wrote to memory of 2316	3920	hopefully working.exe	77
PID 3920 wrote to memory of 4192	3920	hopefully working.exe	79
PID 3920 wrote to memory of 4192	3920	hopefully working.exe	79
PID 4192 wrote to memory of 4240	4192	MinecraftUpdater.exe	80
PID 4192 wrote to memory of 4240	4192	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\hopefully working.exe
"C:\Users\Admin\AppData\Local\Temp\hopefully working.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- 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
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2316
- 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:4192
- - 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:4240

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Credential Access

Discovery

Query Registry

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
d99ad666c46f6027182170b415628651

SHA1
95e57ce111b72ea7b062e3d87165416eb6ee6141

SHA256
3d8d2e7e8d205f96165c848b68671b13fc419ae0429a6079999344a925f44d41

SHA512
af808083c25b323120bcee39189fc06391a97f54dc11724c33070dfe6bddf32dbd2fef4543a8202eec5d77a7b2d25a76dcb952de48d5c5b81bc0cae8d4bddacc

Download Submit
memory/3920-0-0x00007FF839FF3000-0x00007FF839FF5000-memory.dmp

Filesize
8KB

Download
memory/3920-1-0x00000000009E0000-0x0000000000D04000-memory.dmp

Filesize
3.1MB

Download
memory/3920-2-0x00007FF839FF0000-0x00007FF83AAB2000-memory.dmp

Filesize
10.8MB

Download
memory/3920-9-0x00007FF839FF0000-0x00007FF83AAB2000-memory.dmp

Filesize
10.8MB

Download
memory/4192-10-0x00007FF839FF0000-0x00007FF83AAB2000-memory.dmp

Filesize
10.8MB

Download
memory/4192-11-0x00007FF839FF0000-0x00007FF83AAB2000-memory.dmp

Filesize
10.8MB

Download
memory/4192-12-0x000000001B760000-0x000000001B7B0000-memory.dmp

Filesize
320KB

Download
memory/4192-13-0x000000001BEA0000-0x000000001BF52000-memory.dmp

Filesize
712KB

Download
memory/4192-14-0x00007FF839FF0000-0x00007FF83AAB2000-memory.dmp

Filesize
10.8MB

Download