quasar | d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e

Reason

Machine shutdown

General

Target

d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.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

C2

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
behavioral2/memory/4760-1-0x0000000000DD0000-0x0000000000E5C000-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
behavioral2/memory/4760-1-0x0000000000DD0000-0x0000000000E5C000-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

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4760-1-0x0000000000DD0000-0x0000000000E5C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4760-1-0x0000000000DD0000-0x0000000000E5C000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing artifacts associated with disabling Widnows Defender 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4760-1-0x0000000000DD0000-0x0000000000E5C000-memory.dmp	INDICATOR_SUSPICIOUS_DisableWinDefender

Detects executables embedding registry key / value combination indicative of disabling Windows Defender features 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4760-1-0x0000000000DD0000-0x0000000000E5C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_RegKeyComb_DisableWinDefender

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:

d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe

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
8	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	procid_target
448	4760	WerFault.exe	80

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
3672	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1796	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe

description	pid	Process
Token: SeDebugPrivilege	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe
Token: SeDebugPrivilege	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe

pid	Process
4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.execmd.exe

description	pid	Process	procid_target
PID 4760 wrote to memory of 3672	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe	85
PID 4760 wrote to memory of 3672	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe	85
PID 4760 wrote to memory of 3672	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe	85
PID 4760 wrote to memory of 3768	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe	87
PID 4760 wrote to memory of 3768	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe	87
PID 4760 wrote to memory of 3768	4760	d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe	87
PID 3768 wrote to memory of 2024	3768	cmd.exe	91
PID 3768 wrote to memory of 2024	3768	cmd.exe	91
PID 3768 wrote to memory of 2024	3768	cmd.exe	91
PID 3768 wrote to memory of 1796	3768	cmd.exe	92
PID 3768 wrote to memory of 1796	3768	cmd.exe	92
PID 3768 wrote to memory of 1796	3768	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe
"C:\Users\Admin\AppData\Local\Temp\d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4760
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3672
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\xWe02TGtX6sm.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3768
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2024
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4760 -s 2136
  2⤵
  - Program crash
  PID:448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4760 -ip 4760
1⤵
PID:1072

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\xWe02TGtX6sm.bat

Filesize
261B

MD5
bd87eab8960314fc7f8f0a776a116980

SHA1
820393d44c6841975d2b1242220174639eb9a4e6

SHA256
f0bede6fae6327d4a7d74519c6f10d2e41ca895bf624e8636fcdbaae32bd8390

SHA512
295b6895e5179072bb5974866b5db2c00cc425498e27f8ca4bf0aca4a93059ebd1628e230c71bf683de0aa78d1702689d72f810d4944528193bd4c227c096efd

Download Submit
memory/4760-0-0x0000000074FCE000-0x0000000074FCF000-memory.dmp

Filesize
4KB

Download
memory/4760-1-0x0000000000DD0000-0x0000000000E5C000-memory.dmp

Filesize
560KB

Download
memory/4760-2-0x0000000005D10000-0x00000000062B4000-memory.dmp

Filesize
5.6MB

Download
memory/4760-3-0x0000000005800000-0x0000000005892000-memory.dmp

Filesize
584KB

Download
memory/4760-4-0x0000000074FC0000-0x0000000075770000-memory.dmp

Filesize
7.7MB

Download
memory/4760-5-0x0000000005760000-0x00000000057C6000-memory.dmp

Filesize
408KB

Download
memory/4760-6-0x0000000005CA0000-0x0000000005CB2000-memory.dmp

Filesize
72KB

Download
memory/4760-7-0x0000000006AA0000-0x0000000006ADC000-memory.dmp

Filesize
240KB

Download
memory/4760-9-0x0000000006DF0000-0x0000000006DFA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads