quasar | 24870912ebadfaf5657f71f068767c1ad98f3fc973b313dec17f170808c33293

Analysis

max time kernel
119s
max time network
127s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02-06-2024 23:53

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General

Target

Client-built.exe
Size

3.1MB
MD5

c7120916a9fb4b558f1e36da622fb7b2
SHA1

88689f5e3eec43a9839cbae46b8b295ac88645cc
SHA256

d5b9c9a4f3587ab74c78cc9631306dc577663ce4ce7b1619597a82c036c0b63b
SHA512

93f9a94ada80ad66fa8c8d67ee3b3fe3c035404e67a73548161a12833ae27beb6c4b9b50d9fb5b859b01a1cbe0d8b3e6b10c27dadd6a79a55b43e6083194ec1d
SSDEEP

49152:2v5Jo21JaEW0kPnlodHoSpSrApeu+g8jhtUoGdbxTHHB72eh2NT:2vTo21JaEW0kPnlodH5pSrAEu+gn

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.1:4782

88.98.207.207:4782

192.168.1.211:4782

192.168.0.132:4782

2a01:4b00:b31a:3e00:d4a4:5f88:ab8:cc7d:4782

fd00::1617:c634:9b0b:2a22:4782

2a01:4b00:b31a:3e00:c7a:623f:eb1:3db6:4782

fd00::c7a:623f:eb1:3db6:4782

fe80::19ef:ec1a:f41f:39a5%5:4782

192.168.1.211:52859

2a01:4b00:b31a:3e00:d4a4:5f88:ab8:cc7d:52859

Mutex

6d19d2f9-1235-4b10-a1dd-486dc3edd052

Attributes

encryption_key
12AE26995FE0F312DC3ADA3C8CD142053AD088CA
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 payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2808-1-0x0000000000280000-0x00000000005A4000-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/Job
T1053

Processes:

schtasks.exe

pid process

1496 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Client-built.exe

description pid process

Token: SeDebugPrivilege 2808 Client-built.exe

pid	process
1496	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2808	Client-built.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Client-built.exe

description	pid	process	target process
PID 2808 wrote to memory of 1496	2808	Client-built.exe	schtasks.exe
PID 2808 wrote to memory of 1496	2808	Client-built.exe	schtasks.exe
PID 2808 wrote to memory of 1496	2808	Client-built.exe	schtasks.exe

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2808

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1496

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

memory/2808-0-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

Filesize
4KB

Download
memory/2808-1-0x0000000000280000-0x00000000005A4000-memory.dmp

Filesize
3.1MB

Download
memory/2808-2-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

Filesize
9.9MB

Download
memory/2808-4-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

Filesize
4KB

Download
memory/2808-5-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads