quasar | 5800caf82a36637733bfcbf94ff7d84a94b9aed9219e379f8a7fd0fdb9ba2f65

Analysis

max time kernel
95s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
15-06-2024 04:33

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General

Target

server.exe
Size

3.1MB
MD5

07dccd8779b74ad4a54626bcd2cb3bef
SHA1

f433850738d4a26367da7596b73003200053362c
SHA256

5800caf82a36637733bfcbf94ff7d84a94b9aed9219e379f8a7fd0fdb9ba2f65
SHA512

4c9c9c9801f62fc8ad811e0e0f46eed808fb2085470f6ba82e1d8319f27459731ef8a77db8cc4be389c452816156bcdcf1a0e0e709b5559b0a072601e9f65cbc
SSDEEP

49152:3vGlL26AaNeWgPhlmVqvMQ7XSKZoRJ64bR3LoGdZtTHHB72eh2NT:3vGL26AaNeWgPhlmVqkQ7XSKZoRJ6SJ

Score

10^/10

quasar @123 spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

@123

mother-amanda.gl.at.ply.gg:21734

Mutex

9e934c1b-08a6-4685-bb6a-de27a875f421

Attributes

encryption_key
8E8D64935A72F87FC7C5AD95C61A6C59BC55CDA1
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/1844-1-0x00000000008A0000-0x0000000000BC4000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

server.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2080292272-204036150-2159171770-1000\Control Panel\International\Geo\Nation server.exe
Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1360 PING.EXE
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

server.exe

description pid process

Token: SeDebugPrivilege 1844 server.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

server.exe

pid process

1844 server.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2080292272-204036150-2159171770-1000\Control Panel\International\Geo\Nation	server.exe

pid	process
1360	PING.EXE

description	pid	process
Token: SeDebugPrivilege	1844	server.exe

pid	process
1844	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

server.execmd.exe

description	pid	process	target process
PID 1844 wrote to memory of 5104	1844	server.exe	cmd.exe
PID 1844 wrote to memory of 5104	1844	server.exe	cmd.exe
PID 5104 wrote to memory of 2988	5104	cmd.exe	chcp.com
PID 5104 wrote to memory of 2988	5104	cmd.exe	chcp.com
PID 5104 wrote to memory of 1360	5104	cmd.exe	PING.EXE
PID 5104 wrote to memory of 1360	5104	cmd.exe	PING.EXE

C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1844

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\5nQSobDSnm4Q.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:5104

C:\Windows\system32\chcp.com
chcp 65001
3⤵
PID:2988

C:\Windows\system32\PING.EXE
ping -n 10 localhost
3⤵
- Runs ping.exe
PID:1360

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

Query Registry

T1012

System Information Discovery

T1082

Remote System Discovery

T1018

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\5nQSobDSnm4Q.bat
Filesize
207B

MD5
921e455f26e61d7135292ac764c30902

SHA1
8d995a29d6b0fc7901de52e69b507fbfedf0504c

SHA256
e1518a3cf8f245934c2e80a29b46708b343ea3951738ffab8aac2894075da841

SHA512
d31135eca5d069e1694e119ef52f7b13af723dbbf1fcb18886e91a0f4d39bd0b7ab20900dfbcf210752de23de6dc56d6d76a6738ba81af88c525468b70ac91c5

Download Submit
memory/1844-0-0x00007FFCF9A73000-0x00007FFCF9A75000-memory.dmp

Filesize
8KB

Download
memory/1844-1-0x00000000008A0000-0x0000000000BC4000-memory.dmp

Filesize
3.1MB

Download
memory/1844-2-0x00007FFCF9A70000-0x00007FFCFA531000-memory.dmp

Filesize
10.8MB

Download
memory/1844-3-0x000000001B740000-0x000000001B790000-memory.dmp

Filesize
320KB

Download
memory/1844-4-0x000000001BF80000-0x000000001C032000-memory.dmp

Filesize
712KB

Download
memory/1844-5-0x000000001B7B0000-0x000000001B7C2000-memory.dmp

Filesize
72KB

Download
memory/1844-6-0x000000001B930000-0x000000001B96C000-memory.dmp

Filesize
240KB

Download
memory/1844-7-0x00007FFCF9A73000-0x00007FFCF9A75000-memory.dmp

Filesize
8KB

Download
memory/1844-8-0x00007FFCF9A70000-0x00007FFCFA531000-memory.dmp

Filesize
10.8MB

Download
memory/1844-13-0x00007FFCF9A70000-0x00007FFCFA531000-memory.dmp

Filesize
10.8MB

Download