quasar | e864d7a6f0e27540456778b7f8dd2d0b290cd2566c57912aa6aa224e6af8e90f

Analysis

max time kernel
125s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2025, 12:34

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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

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/2524-1-0x00000000003B0000-0x00000000006E0000-memory.dmp	family_quasar
behavioral2/files/0x0008000000024191-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5408	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
736	schtasks.exe
4828	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2524	Velocity.exe
Token: SeDebugPrivilege	5408	Velocity.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5408	Velocity.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
5408	Velocity.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5408	Velocity.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 736	2524	Velocity.exe	87
PID 2524 wrote to memory of 736	2524	Velocity.exe	87
PID 2524 wrote to memory of 5408	2524	Velocity.exe	89
PID 2524 wrote to memory of 5408	2524	Velocity.exe	89
PID 5408 wrote to memory of 4828	5408	Velocity.exe	93
PID 5408 wrote to memory of 4828	5408	Velocity.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\Velocity.exe
"C:\Users\Admin\AppData\Local\Temp\Velocity.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2524
- 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:736
- 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:5408
- - 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:4828

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\Local\Microsoft\CLR_v4.0\UsageLogs\Velocity.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

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

Filesize
3.2MB

MD5
537055d2d528bfbe39b4ed23f981bc3f

SHA1
d1779f003cc53b6b62aad0aa569d159fcfff481e

SHA256
e864d7a6f0e27540456778b7f8dd2d0b290cd2566c57912aa6aa224e6af8e90f

SHA512
eace66995f8d17d8f3e83f27a9dd0cfda1774c680cb5b1e912d6fbc96b395aa58d048cc06ac1aae3742bf782e863c0255a77e7e8d980b544e85a7031af87f4dd

Download Submit
memory/2524-0-0x00007FFDC2403000-0x00007FFDC2405000-memory.dmp

Filesize
8KB

Download
memory/2524-1-0x00000000003B0000-0x00000000006E0000-memory.dmp

Filesize
3.2MB

Download
memory/2524-2-0x00007FFDC2400000-0x00007FFDC2EC1000-memory.dmp

Filesize
10.8MB

Download
memory/2524-10-0x00007FFDC2400000-0x00007FFDC2EC1000-memory.dmp

Filesize
10.8MB

Download
memory/5408-11-0x00007FFDC2400000-0x00007FFDC2EC1000-memory.dmp

Filesize
10.8MB

Download
memory/5408-12-0x00007FFDC2400000-0x00007FFDC2EC1000-memory.dmp

Filesize
10.8MB

Download
memory/5408-13-0x000000001B610000-0x000000001B660000-memory.dmp

Filesize
320KB

Download
memory/5408-14-0x000000001BF60000-0x000000001C012000-memory.dmp

Filesize
712KB

Download
memory/5408-15-0x00007FFDC2400000-0x00007FFDC2EC1000-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