oski | cd986b32c220cc04c9feb5e42a393fb34efc884d176e6d8d266e54ac4840cfa3

Analysis

max time kernel
29s
max time network
31s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
16-05-2024 17:48

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General

Target

Oski Cracked.exe
Size

4.5MB
MD5

a52baa5b64635eec7c7b888bff016aac
SHA1

a86b895b483df3c657553f498ebcd9c97b89415f
SHA256

cd986b32c220cc04c9feb5e42a393fb34efc884d176e6d8d266e54ac4840cfa3
SHA512

bed140ed03ed4b5da82edf1139eced7c84a56fe75f5a8926002414ed0b8f25fbb6cbf9e3111ff6d9b5d942382be331a674f17cf10b2150f171f32276ad4b3980
SSDEEP

98304:iJCbuSMburCaMZh0yEKj+WRvrY1dcZ048HV/bFy8jJ7APB:8mMbuQZlFY7KsZPNA

Score

10^/10

oski quasar venomrat vilva v3 evasion infostealer rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

VILVA V3

67.213.221.18:7812

Mutex

VNM_MUTEX_DR6NAzaayWgRGuLNpp

Attributes

encryption_key
izGdDJVzqIzRDlXcooB4
install_name
Windows Defender Security.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Service
subdirectory
WindowsDir

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.

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows Security.exe	disable_win_def
behavioral4/memory/3908-23-0x0000000000010000-0x000000000009C000-memory.dmp	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

Windows Security.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	Windows Security.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	Windows Security.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	Windows Security.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	Windows Security.exe

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows Security.exe	family_quasar
behavioral4/memory/3908-23-0x0000000000010000-0x000000000009C000-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
Executes dropped EXE 3 IoCs

Processes:

Windows Security.exeOski Cracked.exeWindows Defender Security.exe

pid process

3908 Windows Security.exe
2380 Oski Cracked.exe
3700 Windows Defender Security.exe

pid	process
3908	Windows Security.exe
2380	Oski Cracked.exe
3700	Windows Defender Security.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

Windows Security.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	Windows Security.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	Windows Security.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

1 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

2636 schtasks.exe
3600 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1444 PING.EXE

flow	ioc
1	ip-api.com

pid	process
2636	schtasks.exe
3600	schtasks.exe

pid	process
1444	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exeWindows Security.exe

pid	process
2544	powershell.exe
2544	powershell.exe
3908	Windows Security.exe
3908	Windows Security.exe
3908	Windows Security.exe
3908	Windows Security.exe
3908	Windows Security.exe
3908	Windows Security.exe
3908	Windows Security.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Windows Security.exepowershell.exeWindows Defender Security.exe

description	pid	process
Token: SeDebugPrivilege	3908	Windows Security.exe
Token: SeDebugPrivilege	2544	powershell.exe
Token: SeDebugPrivilege	3700	Windows Defender Security.exe
Token: SeDebugPrivilege	3700	Windows Defender Security.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Defender Security.exe

pid process

3700 Windows Defender Security.exe

pid	process
3700	Windows Defender Security.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

Oski Cracked.exeWindows Security.exeWindows Defender Security.execmd.execmd.exe

description	pid	process	target process
PID 2732 wrote to memory of 3908	2732	Oski Cracked.exe	Windows Security.exe
PID 2732 wrote to memory of 3908	2732	Oski Cracked.exe	Windows Security.exe
PID 2732 wrote to memory of 3908	2732	Oski Cracked.exe	Windows Security.exe
PID 2732 wrote to memory of 2380	2732	Oski Cracked.exe	Oski Cracked.exe
PID 2732 wrote to memory of 2380	2732	Oski Cracked.exe	Oski Cracked.exe
PID 3908 wrote to memory of 2636	3908	Windows Security.exe	schtasks.exe
PID 3908 wrote to memory of 2636	3908	Windows Security.exe	schtasks.exe
PID 3908 wrote to memory of 2636	3908	Windows Security.exe	schtasks.exe
PID 3908 wrote to memory of 3700	3908	Windows Security.exe	Windows Defender Security.exe
PID 3908 wrote to memory of 3700	3908	Windows Security.exe	Windows Defender Security.exe
PID 3908 wrote to memory of 3700	3908	Windows Security.exe	Windows Defender Security.exe
PID 3908 wrote to memory of 2544	3908	Windows Security.exe	powershell.exe
PID 3908 wrote to memory of 2544	3908	Windows Security.exe	powershell.exe
PID 3908 wrote to memory of 2544	3908	Windows Security.exe	powershell.exe
PID 3700 wrote to memory of 3600	3700	Windows Defender Security.exe	schtasks.exe
PID 3700 wrote to memory of 3600	3700	Windows Defender Security.exe	schtasks.exe
PID 3700 wrote to memory of 3600	3700	Windows Defender Security.exe	schtasks.exe
PID 3908 wrote to memory of 3336	3908	Windows Security.exe	cmd.exe
PID 3908 wrote to memory of 3336	3908	Windows Security.exe	cmd.exe
PID 3908 wrote to memory of 3336	3908	Windows Security.exe	cmd.exe
PID 3336 wrote to memory of 3132	3336	cmd.exe	cmd.exe
PID 3336 wrote to memory of 3132	3336	cmd.exe	cmd.exe
PID 3336 wrote to memory of 3132	3336	cmd.exe	cmd.exe
PID 3908 wrote to memory of 424	3908	Windows Security.exe	cmd.exe
PID 3908 wrote to memory of 424	3908	Windows Security.exe	cmd.exe
PID 3908 wrote to memory of 424	3908	Windows Security.exe	cmd.exe
PID 424 wrote to memory of 1472	424	cmd.exe	chcp.com
PID 424 wrote to memory of 1472	424	cmd.exe	chcp.com
PID 424 wrote to memory of 1472	424	cmd.exe	chcp.com
PID 424 wrote to memory of 1444	424	cmd.exe	PING.EXE
PID 424 wrote to memory of 1444	424	cmd.exe	PING.EXE
PID 424 wrote to memory of 1444	424	cmd.exe	PING.EXE

C:\Users\Admin\AppData\Local\Temp\Oski Cracked.exe
"C:\Users\Admin\AppData\Local\Temp\Oski Cracked.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2732

C:\Users\Admin\AppData\Roaming\Windows Security.exe
"C:\Users\Admin\AppData\Roaming\Windows Security.exe"
2⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3908

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Security.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2636

C:\Users\Admin\AppData\Roaming\WindowsDir\Windows Defender Security.exe
"C:\Users\Admin\AppData\Roaming\WindowsDir\Windows Defender Security.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3700

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsDir\Windows Defender Security.exe" /rl HIGHEST /f
4⤵
- Creates scheduled task(s)
PID:3600

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2544

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3336

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
4⤵
PID:3132

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\xIbRP2Lt18p3.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:424

C:\Windows\SysWOW64\chcp.com
chcp 65001
4⤵
PID:1472

C:\Windows\SysWOW64\PING.EXE
ping -n 10 localhost
4⤵
- Runs ping.exe
PID:1444

C:\Users\Admin\AppData\Roaming\Oski Cracked.exe
"C:\Users\Admin\AppData\Roaming\Oski Cracked.exe"
2⤵
- Executes dropped EXE
PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

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

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sezxnufm.jkc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\xIbRP2Lt18p3.bat

Filesize
210B

MD5
328a970a3f96203abd421155b31d6cf9

SHA1
d9c26b7a9860d863878ea1523dd24dc327e1bacd

SHA256
9b02ecf138bac892f91ed13d5d34355e7eb475e584827925927a6256a65c38b2

SHA512
13aa5d4353fd8253fcf741f280692012b6673b8f5fcd204165c053cd9afd9194f0ee49431d3cfdaadf2092db4422f620f9cb5bc7e41b958acc797b0ed897f680

Download Submit
C:\Users\Admin\AppData\Roaming\Oski Cracked.exe

Filesize
3.9MB

MD5
2bd0e61c45d352697c5e16437d8055b0

SHA1
0b9b24d396a50c2dc13d73e1f2d57c1891de3f31

SHA256
71efc8fc1dede4f96e837043ad3cbd38a65bd530ce71ae4d44ddc29843fab70b

SHA512
80044d4ece73637328e9b456c3127be02ecc9cea4b12fee65a884fed0266187aec58e6906c652face3b6125d59b9fa10303f02e1d8bfa33dbccb62fd2bc2b73d

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Security.exe

Filesize
534KB

MD5
deb0b7c057e00267baf93d2be0fd5e9f

SHA1
0938426efa7763dde948ce903b46bc88c7f8bf04

SHA256
401d7686d9400875f1ee068006e7142c1bdc1108d4ddb3113924dddb312be7d5

SHA512
e9d5986b49339fb99703d34743fec5a6522e4c2d05a81a818d58c9f15a1144d338058ebdb3076f5a683cd5bf03d01ac50156f2063450d4955f7cf854b2d1869e

Download Submit
memory/2380-75-0x00007FFC70E80000-0x00007FFC70F3D000-memory.dmp

Filesize
756KB

Download
memory/2380-33-0x0000000000370000-0x0000000000766000-memory.dmp

Filesize
4.0MB

Download
memory/2380-92-0x00007FFC70E80000-0x00007FFC70F3D000-memory.dmp

Filesize
756KB

Download
memory/2380-86-0x00007FFC626A3000-0x00007FFC626A5000-memory.dmp

Filesize
8KB

Download
memory/2380-30-0x00007FFC626A3000-0x00007FFC626A5000-memory.dmp

Filesize
8KB

Download
memory/2380-74-0x00007FFC70E9E000-0x00007FFC70E9F000-memory.dmp

Filesize
4KB

Download
memory/2380-71-0x000000001B4E0000-0x000000001B8FC000-memory.dmp

Filesize
4.1MB

Download
memory/2544-77-0x0000000006FA0000-0x0000000007036000-memory.dmp

Filesize
600KB

Download
memory/2544-70-0x0000000006BC0000-0x0000000006C64000-memory.dmp

Filesize
656KB

Download
memory/2544-82-0x0000000007040000-0x0000000007048000-memory.dmp

Filesize
32KB

Download
memory/2544-81-0x0000000007060000-0x000000000707A000-memory.dmp

Filesize
104KB

Download
memory/2544-80-0x0000000006F50000-0x0000000006F65000-memory.dmp

Filesize
84KB

Download
memory/2544-42-0x00000000021A0000-0x00000000021D6000-memory.dmp

Filesize
216KB

Download
memory/2544-43-0x0000000004C70000-0x000000000529A000-memory.dmp

Filesize
6.2MB

Download
memory/2544-49-0x0000000004C00000-0x0000000004C22000-memory.dmp

Filesize
136KB

Download
memory/2544-79-0x0000000006F40000-0x0000000006F4E000-memory.dmp

Filesize
56KB

Download
memory/2544-50-0x00000000053D0000-0x0000000005436000-memory.dmp

Filesize
408KB

Download
memory/2544-54-0x00000000054B0000-0x0000000005807000-memory.dmp

Filesize
3.3MB

Download
memory/2544-55-0x00000000059A0000-0x00000000059BE000-memory.dmp

Filesize
120KB

Download
memory/2544-56-0x00000000059E0000-0x0000000005A2C000-memory.dmp

Filesize
304KB

Download
memory/2544-78-0x0000000006F10000-0x0000000006F21000-memory.dmp

Filesize
68KB

Download
memory/2544-60-0x0000000073250000-0x000000007329C000-memory.dmp

Filesize
304KB

Download
memory/2544-76-0x0000000006D70000-0x0000000006D7A000-memory.dmp

Filesize
40KB

Download
memory/2544-59-0x0000000006B60000-0x0000000006B94000-memory.dmp

Filesize
208KB

Download
memory/2544-69-0x0000000006BA0000-0x0000000006BBE000-memory.dmp

Filesize
120KB

Download
memory/2544-73-0x0000000006D00000-0x0000000006D1A000-memory.dmp

Filesize
104KB

Download
memory/2544-72-0x0000000007340000-0x00000000079BA000-memory.dmp

Filesize
6.5MB

Download
memory/2732-3-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/2732-32-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/2732-0-0x00000000753F1000-0x00000000753F2000-memory.dmp

Filesize
4KB

Download
memory/2732-1-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/3700-58-0x0000000007000000-0x000000000700A000-memory.dmp

Filesize
40KB

Download
memory/3908-29-0x0000000004A90000-0x0000000004B22000-memory.dmp

Filesize
584KB

Download
memory/3908-26-0x0000000005040000-0x00000000055E6000-memory.dmp

Filesize
5.6MB

Download
memory/3908-36-0x0000000005C80000-0x0000000005CBC000-memory.dmp

Filesize
240KB

Download
memory/3908-35-0x0000000005730000-0x0000000005742000-memory.dmp

Filesize
72KB

Download
memory/3908-34-0x0000000004B30000-0x0000000004B96000-memory.dmp

Filesize
408KB

Download
memory/3908-85-0x00000000724FE000-0x00000000724FF000-memory.dmp

Filesize
4KB

Download
memory/3908-22-0x00000000724FE000-0x00000000724FF000-memory.dmp

Filesize
4KB

Download
memory/3908-31-0x0000000004A20000-0x0000000004A30000-memory.dmp

Filesize
64KB

Download
memory/3908-23-0x0000000000010000-0x000000000009C000-memory.dmp

Filesize
560KB

Download