quasar | e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05

Analysis

max time kernel
160s
max time network
166s
platform
windows10_x64
resource
win10-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 2 IoCs

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

resource	yara_rule
behavioral2/files/0x000400000001aaf0-125.dat	disable_win_def
behavioral2/files/0x000400000001aaf0-126.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 2 IoCs

resource	yara_rule
behavioral2/files/0x000400000001aaf0-125.dat	family_quasar
behavioral2/files/0x000400000001aaf0-126.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
3184	GNU.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
13	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
3584	schtasks.exe
4084	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1284	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2108	powershell.exe
2108	powershell.exe
2108	powershell.exe
3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
1476	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
Token: SeDebugPrivilege	2108	powershell.exe
Token: SeDebugPrivilege	3184	GNU.exe
Token: SeDebugPrivilege	3184	GNU.exe
Token: SeDebugPrivilege	1476	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3184	GNU.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3692 wrote to memory of 3584	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	76
PID 3692 wrote to memory of 3584	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	76
PID 3692 wrote to memory of 3584	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	76
PID 3692 wrote to memory of 3184	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	78
PID 3692 wrote to memory of 3184	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	78
PID 3692 wrote to memory of 3184	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	78
PID 3692 wrote to memory of 2108	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	79
PID 3692 wrote to memory of 2108	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	79
PID 3692 wrote to memory of 2108	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	79
PID 3184 wrote to memory of 4084	3184	GNU.exe	81
PID 3184 wrote to memory of 4084	3184	GNU.exe	81
PID 3184 wrote to memory of 4084	3184	GNU.exe	81
PID 3692 wrote to memory of 2508	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	86
PID 3692 wrote to memory of 2508	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	86
PID 3692 wrote to memory of 2508	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	86
PID 2508 wrote to memory of 3884	2508	cmd.exe	88
PID 2508 wrote to memory of 3884	2508	cmd.exe	88
PID 2508 wrote to memory of 3884	2508	cmd.exe	88
PID 3692 wrote to memory of 2052	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	89
PID 3692 wrote to memory of 2052	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	89
PID 3692 wrote to memory of 2052	3692	e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe	89
PID 2052 wrote to memory of 2520	2052	cmd.exe	91
PID 2052 wrote to memory of 2520	2052	cmd.exe	91
PID 2052 wrote to memory of 2520	2052	cmd.exe	91
PID 2052 wrote to memory of 1284	2052	cmd.exe	92
PID 2052 wrote to memory of 1284	2052	cmd.exe	92
PID 2052 wrote to memory of 1284	2052	cmd.exe	92
PID 2052 wrote to memory of 1476	2052	cmd.exe	93
PID 2052 wrote to memory of 1476	2052	cmd.exe	93
PID 2052 wrote to memory of 1476	2052	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe
"C:\Users\Admin\AppData\Local\Temp\e9235af1531343351a94508e6795d9fdc05bb06b334e8368dc39f0fe12c46f05.exe"
1⤵
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3692
- 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:3584
- 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:3184
- - 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:4084
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2108
- 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:2508
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:3884
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\egLDFswknq7E.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2520
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1284
- - 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:1476

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

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1476-399-0x00000000055E0000-0x0000000005ADE000-memory.dmp

Filesize
5.0MB

Download
memory/2108-143-0x0000000007BC0000-0x0000000007BC1000-memory.dmp

Filesize
4KB

Download
memory/2108-158-0x0000000009410000-0x0000000009443000-memory.dmp

Filesize
204KB

Download
memory/2108-372-0x00000000096C0000-0x00000000096C1000-memory.dmp

Filesize
4KB

Download
memory/2108-366-0x00000000096D0000-0x00000000096D1000-memory.dmp

Filesize
4KB

Download
memory/2108-136-0x0000000004970000-0x0000000004971000-memory.dmp

Filesize
4KB

Download
memory/2108-134-0x0000000004980000-0x0000000004981000-memory.dmp

Filesize
4KB

Download
memory/2108-137-0x0000000004972000-0x0000000004973000-memory.dmp

Filesize
4KB

Download
memory/2108-138-0x0000000007380000-0x0000000007381000-memory.dmp

Filesize
4KB

Download
memory/2108-139-0x00000000079F0000-0x00000000079F1000-memory.dmp

Filesize
4KB

Download
memory/2108-140-0x0000000007A90000-0x0000000007A91000-memory.dmp

Filesize
4KB

Download
memory/2108-142-0x0000000007DC0000-0x0000000007DC1000-memory.dmp

Filesize
4KB

Download
memory/2108-241-0x0000000004973000-0x0000000004974000-memory.dmp

Filesize
4KB

Download
memory/2108-144-0x0000000008680000-0x0000000008681000-memory.dmp

Filesize
4KB

Download
memory/2108-172-0x0000000009740000-0x0000000009741000-memory.dmp

Filesize
4KB

Download
memory/2108-149-0x0000000008460000-0x0000000008461000-memory.dmp

Filesize
4KB

Download
memory/2108-171-0x0000000009560000-0x0000000009561000-memory.dmp

Filesize
4KB

Download
memory/2108-170-0x000000007F070000-0x000000007F071000-memory.dmp

Filesize
4KB

Download
memory/2108-165-0x00000000093F0000-0x00000000093F1000-memory.dmp

Filesize
4KB

Download
memory/3184-150-0x0000000006A60000-0x0000000006A61000-memory.dmp

Filesize
4KB

Download
memory/3184-135-0x0000000005520000-0x0000000005521000-memory.dmp

Filesize
4KB

Download
memory/3692-115-0x0000000000BC0000-0x0000000000BC1000-memory.dmp

Filesize
4KB

Download
memory/3692-122-0x0000000006640000-0x0000000006641000-memory.dmp

Filesize
4KB

Download
memory/3692-121-0x0000000006270000-0x0000000006271000-memory.dmp

Filesize
4KB

Download
memory/3692-120-0x0000000005710000-0x0000000005711000-memory.dmp

Filesize
4KB

Download
memory/3692-119-0x0000000005540000-0x0000000005541000-memory.dmp

Filesize
4KB

Download
memory/3692-118-0x0000000005570000-0x0000000005571000-memory.dmp

Filesize
4KB

Download
memory/3692-117-0x0000000005A70000-0x0000000005A71000-memory.dmp

Filesize
4KB

Download