quasar | d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
13-06-2024 01:50

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General

Target

WINDOWS SECURITY.EXE.exe
Size

534KB
MD5

9e14775490cee79c73cb45c2f24f7a73
SHA1

ddd6c7485a5e64a66a0a7598777abdafa7a63950
SHA256

d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e
SHA512

1c0aec61a64400bcf18f6f0e5a950c68b7a25492b07290e3793a759f616c1b361ed6472d260d0f379b691567216a1f9e53af53b2dc89711df618a4463c8d0317
SSDEEP

12288:ijxIhDXIsMzz2ze1gejMd3mD88i2i3PdjfAag06:i9+IsM55O3glgPO

Score

10^/10

quasar venomrat windows security rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

windows security

quasarrat220-24487.portmap.io:24487

Mutex

VNM_MUTEX_mOPqShedZxvAqgLrWL

Attributes

encryption_key
7mvA2TfKjvMIY0zZeMKF
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Venom Client Startup
subdirectory
SubDir

Signatures

Contains code to disable Windows Defender 1 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource yara_rule

behavioral1/memory/2080-1-0x00000000002A0000-0x000000000032C000-memory.dmp disable_win_def
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar payload 1 IoCs

Processes:

resource yara_rule

behavioral1/memory/2080-1-0x00000000002A0000-0x000000000032C000-memory.dmp family_quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2688 2080 WerFault.exe WINDOWS SECURITY.EXE.exe
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

2632 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2704 PING.EXE
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

WINDOWS SECURITY.EXE.exe

pid process

2840 WINDOWS SECURITY.EXE.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WINDOWS SECURITY.EXE.exeWINDOWS SECURITY.EXE.exe

description pid process

Token: SeDebugPrivilege 2080 WINDOWS SECURITY.EXE.exe
Token: SeDebugPrivilege 2080 WINDOWS SECURITY.EXE.exe
Token: SeDebugPrivilege 2840 WINDOWS SECURITY.EXE.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

WINDOWS SECURITY.EXE.exe

pid process

2080 WINDOWS SECURITY.EXE.exe

resource	yara_rule
behavioral1/memory/2080-1-0x00000000002A0000-0x000000000032C000-memory.dmp	disable_win_def

resource	yara_rule
behavioral1/memory/2080-1-0x00000000002A0000-0x000000000032C000-memory.dmp	family_quasar

flow	ioc
2	ip-api.com

pid	pid_target	process	target process
2688	2080	WerFault.exe	WINDOWS SECURITY.EXE.exe

pid	process
2632	schtasks.exe

pid	process
2704	PING.EXE

pid	process
2840	WINDOWS SECURITY.EXE.exe

description	pid	process
Token: SeDebugPrivilege	2080	WINDOWS SECURITY.EXE.exe
Token: SeDebugPrivilege	2080	WINDOWS SECURITY.EXE.exe
Token: SeDebugPrivilege	2840	WINDOWS SECURITY.EXE.exe

pid	process
2080	WINDOWS SECURITY.EXE.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

WINDOWS SECURITY.EXE.execmd.exe

description	pid	process	target process
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	schtasks.exe
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	schtasks.exe
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	schtasks.exe
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	schtasks.exe
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	cmd.exe
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	cmd.exe
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	cmd.exe
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	cmd.exe
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	WerFault.exe
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	WerFault.exe
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	WerFault.exe
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	WerFault.exe
PID 2684 wrote to memory of 2724	2684	cmd.exe	chcp.com
PID 2684 wrote to memory of 2724	2684	cmd.exe	chcp.com
PID 2684 wrote to memory of 2724	2684	cmd.exe	chcp.com
PID 2684 wrote to memory of 2724	2684	cmd.exe	chcp.com
PID 2684 wrote to memory of 2704	2684	cmd.exe	PING.EXE
PID 2684 wrote to memory of 2704	2684	cmd.exe	PING.EXE
PID 2684 wrote to memory of 2704	2684	cmd.exe	PING.EXE
PID 2684 wrote to memory of 2704	2684	cmd.exe	PING.EXE
PID 2684 wrote to memory of 2840	2684	cmd.exe	WINDOWS SECURITY.EXE.exe
PID 2684 wrote to memory of 2840	2684	cmd.exe	WINDOWS SECURITY.EXE.exe
PID 2684 wrote to memory of 2840	2684	cmd.exe	WINDOWS SECURITY.EXE.exe
PID 2684 wrote to memory of 2840	2684	cmd.exe	WINDOWS SECURITY.EXE.exe

C:\Users\Admin\AppData\Local\Temp\WINDOWS SECURITY.EXE.exe
"C:\Users\Admin\AppData\Local\Temp\WINDOWS SECURITY.EXE.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2080

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\WINDOWS SECURITY.EXE.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2632

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\8PQM7BX4hSHP.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:2684

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:2724

C:\Windows\SysWOW64\PING.EXE
ping -n 10 localhost
3⤵
- Runs ping.exe
PID:2704

C:\Users\Admin\AppData\Local\Temp\WINDOWS SECURITY.EXE.exe
"C:\Users\Admin\AppData\Local\Temp\WINDOWS SECURITY.EXE.exe"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2080 -s 1432
2⤵
- Program crash
PID:2688

Network

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

System Information Discovery

T1082

Remote System Discovery

T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\8PQM7BX4hSHP.bat
Filesize
217B

MD5
a9d82e3266ea6b66e6f9e57c8aad17ff

SHA1
1a01fb71858fba525a3c7ee31dd13c5317d92ab6

SHA256
4024f58141259550abb94ff31a87c308258e348aa8783b8f6e5050412c8363a0

SHA512
2f53676abe80893d6bae92111db3bfabd777b45a2c3557b432e01ecc6c7c3bb475ee9cb485b4be7d636822b7b47d2c05b6b63c9d688c9ba464903a4d7d84b2b3

Download Submit
memory/2080-0-0x00000000742CE000-0x00000000742CF000-memory.dmp

Filesize
4KB

Download
memory/2080-1-0x00000000002A0000-0x000000000032C000-memory.dmp

Filesize
560KB

Download
memory/2080-2-0x00000000742C0000-0x00000000749AE000-memory.dmp

Filesize
6.9MB

Download
memory/2080-13-0x00000000742CE000-0x00000000742CF000-memory.dmp

Filesize
4KB

Download
memory/2080-14-0x00000000742C0000-0x00000000749AE000-memory.dmp

Filesize
6.9MB

Download