quasar | e864d7a6f0e27540456778b7f8dd2d0b290cd2566c57912aa6aa224e6af8e90f

General

Target

Velocity.exe
Size

3.2MB
MD5

537055d2d528bfbe39b4ed23f981bc3f
SHA1

d1779f003cc53b6b62aad0aa569d159fcfff481e
SHA256

e864d7a6f0e27540456778b7f8dd2d0b290cd2566c57912aa6aa224e6af8e90f
SHA512

eace66995f8d17d8f3e83f27a9dd0cfda1774c680cb5b1e912d6fbc96b395aa58d048cc06ac1aae3742bf782e863c0255a77e7e8d980b544e85a7031af87f4dd
SSDEEP

49152:pvnI22SsaNYfdPBldt698dBcjH7jZUHBeMuoidXTHHB72eh2NTw:pvI22SsaNYfdPBldt6+dBcjH7VUwv

Score

10^/10

quasar office4 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office4

C2

192.168.70.183:4782

Mutex

1b6fc605-bba5-4ddc-971f-36e190d34bce

Attributes

encryption_key
B87D07BD2442C5166BC5075BBDF32026912B9388
install_name
Velocity.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RobloxPlayerBeta
subdirectory
.minecraft

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/3324-1-0x00000000001F0000-0x0000000000520000-memory.dmp	family_quasar
behavioral2/files/0x001a00000002b242-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3520	Velocity.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
4544	schtasks.exe
5492	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3324	Velocity.exe
Token: SeDebugPrivilege	3520	Velocity.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3520	Velocity.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3520	Velocity.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3520	Velocity.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3324 wrote to memory of 4544	3324	Velocity.exe	78
PID 3324 wrote to memory of 4544	3324	Velocity.exe	78
PID 3324 wrote to memory of 3520	3324	Velocity.exe	80
PID 3324 wrote to memory of 3520	3324	Velocity.exe	80
PID 3520 wrote to memory of 5492	3520	Velocity.exe	81
PID 3520 wrote to memory of 5492	3520	Velocity.exe	81

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\Velocity.exe
"C:\Users\Admin\AppData\Local\Temp\Velocity.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3324
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RobloxPlayerBeta" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\.minecraft\Velocity.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4544
- C:\Users\Admin\AppData\Roaming\.minecraft\Velocity.exe
  "C:\Users\Admin\AppData\Roaming\.minecraft\Velocity.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:3520
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RobloxPlayerBeta" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\.minecraft\Velocity.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5492

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Velocity.exe.log

Filesize
1KB

MD5
b4e91d2e5f40d5e2586a86cf3bb4df24

SHA1
31920b3a41aa4400d4a0230a7622848789b38672

SHA256
5d8af3c7519874ed42a0d74ee559ae30d9cc6930aef213079347e2b47092c210

SHA512
968751b79a98961f145de48d425ea820fd1875bae79a725adf35fc8f4706c103ee0c7babd4838166d8a0dda9fbce3728c0265a04c4b37f335ec4eaa110a2b319

Download Submit
C:\Users\Admin\AppData\Roaming\.minecraft\Velocity.exe

Filesize
3.2MB

MD5
537055d2d528bfbe39b4ed23f981bc3f

SHA1
d1779f003cc53b6b62aad0aa569d159fcfff481e

SHA256
e864d7a6f0e27540456778b7f8dd2d0b290cd2566c57912aa6aa224e6af8e90f

SHA512
eace66995f8d17d8f3e83f27a9dd0cfda1774c680cb5b1e912d6fbc96b395aa58d048cc06ac1aae3742bf782e863c0255a77e7e8d980b544e85a7031af87f4dd

Download Submit
memory/3324-0-0x00007FFFAA8D3000-0x00007FFFAA8D5000-memory.dmp

Filesize
8KB

Download
memory/3324-1-0x00000000001F0000-0x0000000000520000-memory.dmp

Filesize
3.2MB

Download
memory/3324-2-0x00007FFFAA8D0000-0x00007FFFAB392000-memory.dmp

Filesize
10.8MB

Download
memory/3324-11-0x00007FFFAA8D0000-0x00007FFFAB392000-memory.dmp

Filesize
10.8MB

Download
memory/3520-10-0x00007FFFAA8D0000-0x00007FFFAB392000-memory.dmp

Filesize
10.8MB

Download
memory/3520-12-0x00007FFFAA8D0000-0x00007FFFAB392000-memory.dmp

Filesize
10.8MB

Download
memory/3520-13-0x000000001BE90000-0x000000001BEE0000-memory.dmp

Filesize
320KB

Download
memory/3520-14-0x000000001CBF0000-0x000000001CCA2000-memory.dmp

Filesize
712KB

Download
memory/3520-15-0x00007FFFAA8D0000-0x00007FFFAB392000-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