quasar | 90f39464d539842cc2f378743c0c9cd499b96a3f1deaeb629b7815c76c808d97

Analysis

max time kernel
3s
max time network
3s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2025 04:04

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General

Target

UniversalFree_Crypted.exe
Size

4.2MB
MD5

edc97f15907d91c7855029db32ab3f1b
SHA1

33ab23c9d6a9f267a8e67d6d8bef539c02649220
SHA256

90f39464d539842cc2f378743c0c9cd499b96a3f1deaeb629b7815c76c808d97
SHA512

e74ce0a6c711bb137ce49f0af1ba51f05aa022a8a94a104884a4765095e268c024eb8f57656f2bbeecd9c36883ad8c270e4b758be560a81a46542560a117f124
SSDEEP

49152:I2Dz4ir0dsj6RA9snP7wtoCiZtI7+h1zKyMNIcSEe7jk8AzYiOdornUkEUuUnY:K

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

127.0.0.1:4782

Mutex

b0a3a901-70c7-4331-bc54-4c2f60c774c7

Attributes

encryption_key
CBFA1F5BBBA35BB09E64850568E8730F58DCF089
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/1908-2-0x0000000006AB0000-0x0000000006DD4000-memory.dmp	family_quasar

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4284	1908	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	UniversalFree_Crypted.exe

C:\Users\Admin\AppData\Local\Temp\UniversalFree_Crypted.exe
"C:\Users\Admin\AppData\Local\Temp\UniversalFree_Crypted.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1908
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1908 -s 904
  2⤵
  - Program crash
  PID:4284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1908 -ip 1908
1⤵
PID:1892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1908-0-0x00007FFCE5210000-0x00007FFCE5405000-memory.dmp

Filesize
2.0MB

Download
memory/1908-1-0x0000000000ED0000-0x0000000000EDA000-memory.dmp

Filesize
40KB

Download
memory/1908-2-0x0000000006AB0000-0x0000000006DD4000-memory.dmp

Filesize
3.1MB

Download