quasar | d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e

General

Target
WINDOWS SECURITY.EXE.exe
Size 534KB
Sample240613-b89cpszenc
SHA256 d53df5b6b080ba24773ca16c7a8b70eeb783ead278712e0c5b44abc84805e60e
MD5 9e14775490cee79c73cb45c2f24f7a73
SHA1 ddd6c7485a5e64a66a0a7598777abdafa7a63950
SHA512 1c0aec61a64400bcf18f6f0e5a950c68b7a25492b07290e3793a759f616c1b361ed6472d260d0f379b691567216a1f9e53af53b2dc89711df618a4463c8d0317
SSDEEP 12288:ijxIhDXIsMzz2ze1gejMd3mD88i2i3PdjfAag06:i9+IsM55O3glgPO
MD5 SHA1 SHA512 SSDEEP

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.

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

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.

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

pid	pid_target	Process	procid_target
2688	2080	WerFault.exe	27

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

pid	Process
2632	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2704	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2840	WINDOWS SECURITY.EXE.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

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

pid	Process
2080	WINDOWS SECURITY.EXE.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	29
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	29
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	29
PID 2080 wrote to memory of 2632	2080	WINDOWS SECURITY.EXE.exe	29
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	31
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	31
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	31
PID 2080 wrote to memory of 2684	2080	WINDOWS SECURITY.EXE.exe	31
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	33
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	33
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	33
PID 2080 wrote to memory of 2688	2080	WINDOWS SECURITY.EXE.exe	33
PID 2684 wrote to memory of 2724	2684	cmd.exe	34
PID 2684 wrote to memory of 2724	2684	cmd.exe	34
PID 2684 wrote to memory of 2724	2684	cmd.exe	34
PID 2684 wrote to memory of 2724	2684	cmd.exe	34
PID 2684 wrote to memory of 2704	2684	cmd.exe	35
PID 2684 wrote to memory of 2704	2684	cmd.exe	35
PID 2684 wrote to memory of 2704	2684	cmd.exe	35
PID 2684 wrote to memory of 2704	2684	cmd.exe	35
PID 2684 wrote to memory of 2840	2684	cmd.exe	36
PID 2684 wrote to memory of 2840	2684	cmd.exe	36
PID 2684 wrote to memory of 2840	2684	cmd.exe	36
PID 2684 wrote to memory of 2840	2684	cmd.exe	36

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 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

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

8PQM7BX4hSHP.bat

Path C:\Users\Admin\AppData\Local\Temp\8PQM7BX4hSHP.bat
Size 217B
SHA256 4024f58141259550abb94ff31a87c308258e348aa8783b8f6e5050412c8363a0
MD5 a9d82e3266ea6b66e6f9e57c8aad17ff
SHA1 1a01fb71858fba525a3c7ee31dd13c5317d92ab6
SHA512 2f53676abe80893d6bae92111db3bfabd777b45a2c3557b432e01ecc6c7c3bb475ee9cb485b4be7d636822b7b47d2c05b6b63c9d688c9ba464903a4d7d84b2b3
MD5 SHA1 SHA512

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

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

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

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

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

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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