quasar | e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05

Analysis

max time kernel
161s
max time network
165s
platform
windows7_x64
resource
win7-en
submitted
08-09-2021 09:07

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General

Target

e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
Size

814KB
MD5

303ea82c0a37e377879a61a6d403ab48
SHA1

f3f542e801ae5a7689864d974e1b4776468acbe2
SHA256

e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05
SHA512

d280e0e59a51135a78cf7699c89317768f8a045441a20990ab286a48be9e20c93ef1eea85f18d9517654f28218c960d21f2ececbe0baa3c8a2790e1304c7c279

Score

10^/10

quasar venomrat client evasion rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Client

spicy-scissors.auto.playit.gg:40602

Mutex

VNM_MUTEX_ZPezzH7q77HhYvgQHf

Attributes

encryption_key
qDSGWka1LfDTYuj2fN6F
install_name
GNU.exe
log_directory
Logs
reconnect_delay
2500
startup_key
Windows Security
subdirectory
Ubuntu

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/0x0002000000012f1e-57.dat	disable_win_def
behavioral1/files/0x0002000000012f1e-60.dat	disable_win_def
behavioral1/files/0x0002000000012f1e-59.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 Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x0002000000012f1e-57.dat	family_quasar
behavioral1/files/0x0002000000012f1e-60.dat	family_quasar
behavioral1/files/0x0002000000012f1e-59.dat	family_quasar

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
112	GNU.exe

Loads dropped DLL 1 IoCs

pid	Process
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.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	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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
276	schtasks.exe
1084	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	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1032	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1756	powershell.exe
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
556	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
Token: SeDebugPrivilege	1756	powershell.exe
Token: SeDebugPrivilege	112	GNU.exe
Token: SeDebugPrivilege	112	GNU.exe
Token: SeDebugPrivilege	556	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
112	GNU.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 852 wrote to memory of 276	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	30
PID 852 wrote to memory of 276	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	30
PID 852 wrote to memory of 276	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	30
PID 852 wrote to memory of 276	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	30
PID 852 wrote to memory of 112	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	32
PID 852 wrote to memory of 112	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	32
PID 852 wrote to memory of 112	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	32
PID 852 wrote to memory of 112	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	32
PID 852 wrote to memory of 1756	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	33
PID 852 wrote to memory of 1756	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	33
PID 852 wrote to memory of 1756	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	33
PID 852 wrote to memory of 1756	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	33
PID 112 wrote to memory of 1084	112	GNU.exe	35
PID 112 wrote to memory of 1084	112	GNU.exe	35
PID 112 wrote to memory of 1084	112	GNU.exe	35
PID 112 wrote to memory of 1084	112	GNU.exe	35
PID 852 wrote to memory of 1992	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	37
PID 852 wrote to memory of 1992	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	37
PID 852 wrote to memory of 1992	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	37
PID 852 wrote to memory of 1992	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	37
PID 1992 wrote to memory of 1700	1992	cmd.exe	39
PID 1992 wrote to memory of 1700	1992	cmd.exe	39
PID 1992 wrote to memory of 1700	1992	cmd.exe	39
PID 1992 wrote to memory of 1700	1992	cmd.exe	39
PID 852 wrote to memory of 436	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	40
PID 852 wrote to memory of 436	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	40
PID 852 wrote to memory of 436	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	40
PID 852 wrote to memory of 436	852	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	40
PID 436 wrote to memory of 840	436	cmd.exe	42
PID 436 wrote to memory of 840	436	cmd.exe	42
PID 436 wrote to memory of 840	436	cmd.exe	42
PID 436 wrote to memory of 840	436	cmd.exe	42
PID 436 wrote to memory of 1032	436	cmd.exe	43
PID 436 wrote to memory of 1032	436	cmd.exe	43
PID 436 wrote to memory of 1032	436	cmd.exe	43
PID 436 wrote to memory of 1032	436	cmd.exe	43
PID 436 wrote to memory of 556	436	cmd.exe	44
PID 436 wrote to memory of 556	436	cmd.exe	44
PID 436 wrote to memory of 556	436	cmd.exe	44
PID 436 wrote to memory of 556	436	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
"C:\Users\Admin\AppData\Local\Temp\e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:852
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:276
- C:\Users\Admin\AppData\Roaming\Ubuntu\GNU.exe
  "C:\Users\Admin\AppData\Roaming\Ubuntu\GNU.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:112
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Ubuntu\GNU.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1084
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1756
- 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:1992
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1700
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\20rsZbkZzL24.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:436
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:840
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1032
- - C:\Users\Admin\AppData\Local\Temp\e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
    "C:\Users\Admin\AppData\Local\Temp\e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:556

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/112-65-0x0000000000500000-0x0000000000501000-memory.dmp

Filesize
4KB

Download
memory/112-62-0x0000000000BA0000-0x0000000000BA1000-memory.dmp

Filesize
4KB

Download
memory/556-79-0x0000000000C10000-0x0000000000C11000-memory.dmp

Filesize
4KB

Download
memory/852-53-0x0000000000D20000-0x0000000000D21000-memory.dmp

Filesize
4KB

Download
memory/852-55-0x0000000000CC0000-0x0000000000CC1000-memory.dmp

Filesize
4KB

Download
memory/1756-64-0x0000000075B51000-0x0000000075B53000-memory.dmp

Filesize
8KB

Download
memory/1756-69-0x0000000001E82000-0x0000000001E84000-memory.dmp

Filesize
8KB

Download
memory/1756-68-0x0000000001E81000-0x0000000001E82000-memory.dmp

Filesize
4KB

Download
memory/1756-66-0x0000000001E80000-0x0000000001E81000-memory.dmp

Filesize
4KB

Download