quasar | 76257feb8d753a419e11bd0672eac3d236ac990d8ba8baf7ec44c5f1f3eac591

Analysis

max time kernel
31s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
15/01/2023, 17:53

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General

Target

testating.exe
Size

502KB
MD5

1f8f68e7623630103601f6235e9c94a6
SHA1

3c32c376b1be12d1f9df117eb8435804548c02c8
SHA256

76257feb8d753a419e11bd0672eac3d236ac990d8ba8baf7ec44c5f1f3eac591
SHA512

c93ba03f50602919a8355334c1450fb9f57aeb432027e53c458195d7dfbdc3940d042e136eb3ace24cd76c1ffbd359be05582893fc0e53f5fe764c8c32fe6631
SSDEEP

6144:4TEgdc0YHXAGbgiIN2RSBWDR3Uz8sXKYF8MtcEnOb8F96rQ3u49JTxcTR32:4TEgdfYfbgnttr3pcreu4nTxcd2

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

192.168.1.237:1290

Mutex

0cdb9102-24f8-4ed6-ba0c-d7625d69d684

Attributes

encryption_key
63E6BFBD5330A53154091A63A8847C4FAA484D23
install_name
Client.exe
log_directory
Logs
reconnect_delay
2899
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/1992-54-0x0000000000D00000-0x0000000000D84000-memory.dmp	family_quasar

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1260	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	testating.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 1260	1992	testating.exe	29
PID 1992 wrote to memory of 1260	1992	testating.exe	29
PID 1992 wrote to memory of 1260	1992	testating.exe	29

C:\Users\Admin\AppData\Local\Temp\testating.exe
"C:\Users\Admin\AppData\Local\Temp\testating.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\testating.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1260

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1992-54-0x0000000000D00000-0x0000000000D84000-memory.dmp

Filesize
528KB

Download
memory/1992-55-0x000007FEFBDF1000-0x000007FEFBDF3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads