quasar | eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7v20201028
submitted
09/11/2020, 20:45

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General

Target

eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
Size

534KB
MD5

13efb4a917e73740050da354d95b760b
SHA1

e2e0f2b32c1794169a66cee6eda2b36ee4814f9f
SHA256

eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c
SHA512

c442cf4a4cca8a4c11cf90d0636d9211efd0ee0b69ed85b9fc427671f8e5693e8edff12df3d62c6b24060b6482c41c7c375b671b8111a598917881b09a40afea

Score

10^/10

quasar venomrat evasion rat rootkit spyware stealer trojan

Malware Config

Signatures

Contains code to disable Windows Defender 3 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/files/0x0005000000013102-4.dat	disable_win_def
behavioral1/files/0x0005000000013102-6.dat	disable_win_def
behavioral1/files/0x0005000000013102-7.dat	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat

Executes dropped EXE 1 IoCs

pid	Process
316	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.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.

flow	ioc
4	ip-api.com

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1292	schtasks.exe
588	schtasks.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1388	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1520	powershell.exe
1520	powershell.exe
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
1060	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
Token: SeDebugPrivilege	316	Client.exe
Token: SeDebugPrivilege	1520	powershell.exe
Token: SeDebugPrivilege	316	Client.exe
Token: SeDebugPrivilege	1060	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
316	Client.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1320 wrote to memory of 1292	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	30
PID 1320 wrote to memory of 1292	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	30
PID 1320 wrote to memory of 1292	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	30
PID 1320 wrote to memory of 1292	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	30
PID 1320 wrote to memory of 316	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	32
PID 1320 wrote to memory of 316	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	32
PID 1320 wrote to memory of 316	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	32
PID 1320 wrote to memory of 316	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	32
PID 1320 wrote to memory of 1520	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	33
PID 1320 wrote to memory of 1520	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	33
PID 1320 wrote to memory of 1520	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	33
PID 1320 wrote to memory of 1520	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	33
PID 316 wrote to memory of 588	316	Client.exe	35
PID 316 wrote to memory of 588	316	Client.exe	35
PID 316 wrote to memory of 588	316	Client.exe	35
PID 316 wrote to memory of 588	316	Client.exe	35
PID 1320 wrote to memory of 1604	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	37
PID 1320 wrote to memory of 1604	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	37
PID 1320 wrote to memory of 1604	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	37
PID 1320 wrote to memory of 1604	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	37
PID 1604 wrote to memory of 1312	1604	cmd.exe	39
PID 1604 wrote to memory of 1312	1604	cmd.exe	39
PID 1604 wrote to memory of 1312	1604	cmd.exe	39
PID 1604 wrote to memory of 1312	1604	cmd.exe	39
PID 1320 wrote to memory of 1484	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	40
PID 1320 wrote to memory of 1484	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	40
PID 1320 wrote to memory of 1484	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	40
PID 1320 wrote to memory of 1484	1320	eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe	40
PID 1484 wrote to memory of 616	1484	cmd.exe	42
PID 1484 wrote to memory of 616	1484	cmd.exe	42
PID 1484 wrote to memory of 616	1484	cmd.exe	42
PID 1484 wrote to memory of 616	1484	cmd.exe	42
PID 1484 wrote to memory of 1388	1484	cmd.exe	43
PID 1484 wrote to memory of 1388	1484	cmd.exe	43
PID 1484 wrote to memory of 1388	1484	cmd.exe	43
PID 1484 wrote to memory of 1388	1484	cmd.exe	43
PID 1484 wrote to memory of 1060	1484	cmd.exe	44
PID 1484 wrote to memory of 1060	1484	cmd.exe	44
PID 1484 wrote to memory of 1060	1484	cmd.exe	44
PID 1484 wrote to memory of 1060	1484	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
"C:\Users\Admin\AppData\Local\Temp\eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1320
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "VenomTest" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1292
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:316
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "VenomTest" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:588
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1604
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1312
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\OKvZb3qkZmCh.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1484
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:616
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1388
- - C:\Users\Admin\AppData\Local\Temp\eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe
    "C:\Users\Admin\AppData\Local\Temp\eee05be1f50efe61ec62eee4af8bca29e1b37115e0e7d23221bbde4471a6258c.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1060

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/316-8-0x0000000074570000-0x0000000074C5E000-memory.dmp

Filesize
6.9MB

Download
memory/316-10-0x0000000000030000-0x0000000000031000-memory.dmp

Filesize
4KB

Download
memory/1060-59-0x0000000074570000-0x0000000074C5E000-memory.dmp

Filesize
6.9MB

Download
memory/1320-0-0x0000000074570000-0x0000000074C5E000-memory.dmp

Filesize
6.9MB

Download
memory/1320-1-0x0000000000C90000-0x0000000000C91000-memory.dmp

Filesize
4KB

Download
memory/1520-26-0x0000000006210000-0x0000000006211000-memory.dmp

Filesize
4KB

Download
memory/1520-20-0x00000000056A0000-0x00000000056A1000-memory.dmp

Filesize
4KB

Download
memory/1520-48-0x0000000006320000-0x0000000006321000-memory.dmp

Filesize
4KB

Download
memory/1520-49-0x0000000006330000-0x0000000006331000-memory.dmp

Filesize
4KB

Download
memory/1520-17-0x0000000005260000-0x0000000005261000-memory.dmp

Filesize
4KB

Download
memory/1520-33-0x00000000061A0000-0x00000000061A1000-memory.dmp

Filesize
4KB

Download
memory/1520-16-0x0000000002550000-0x0000000002551000-memory.dmp

Filesize
4KB

Download
memory/1520-25-0x00000000056E0000-0x00000000056E1000-memory.dmp

Filesize
4KB

Download
memory/1520-14-0x00000000047C0000-0x00000000047C1000-memory.dmp

Filesize
4KB

Download
memory/1520-13-0x00000000022D0000-0x00000000022D1000-memory.dmp

Filesize
4KB

Download
memory/1520-34-0x00000000055F0000-0x00000000055F1000-memory.dmp

Filesize
4KB

Download
memory/1520-12-0x0000000074570000-0x0000000074C5E000-memory.dmp

Filesize
6.9MB

Download