oski | cd986b32c220cc04c9feb5e42a393fb34efc884d176e6d8d266e54ac4840cfa3

Analysis

max time kernel
27s
max time network
29s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-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 3 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
behavioral1/memory/1820-16-0x0000000000E10000-0x0000000000E9C000-memory.dmp	disable_win_def
behavioral1/memory/4108-137-0x0000000001320000-0x0000000001330000-memory.dmp	disable_win_def

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

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

Windows Security.exe

description	ioc	process
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
behavioral1/memory/1820-16-0x0000000000E10000-0x0000000000E9C000-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

1820 Windows Security.exe
4108 Oski Cracked.exe
4724 Windows Defender Security.exe

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows Security.exe	family_quasar
behavioral1/memory/1820-16-0x0000000000E10000-0x0000000000E9C000-memory.dmp	family_quasar

pid	process
1820	Windows Security.exe
4108	Oski Cracked.exe
4724	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

96 schtasks.exe
4132 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

3528 PING.EXE

flow	ioc
1	ip-api.com

pid	process
96	schtasks.exe
4132	schtasks.exe

pid	process
3528	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exeWindows Security.exe

pid	process
2164	powershell.exe
2164	powershell.exe
2164	powershell.exe
1820	Windows Security.exe
1820	Windows Security.exe
1820	Windows Security.exe
1820	Windows Security.exe
1820	Windows Security.exe
1820	Windows Security.exe
1820	Windows Security.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Windows Security.exepowershell.exeWindows Defender Security.exe

description	pid	process
Token: SeDebugPrivilege	1820	Windows Security.exe
Token: SeDebugPrivilege	2164	powershell.exe
Token: SeDebugPrivilege	4724	Windows Defender Security.exe
Token: SeDebugPrivilege	4724	Windows Defender Security.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Defender Security.exe

pid process

4724 Windows Defender Security.exe

pid	process
4724	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 1716 wrote to memory of 1820	1716	Oski Cracked.exe	Windows Security.exe
PID 1716 wrote to memory of 1820	1716	Oski Cracked.exe	Windows Security.exe
PID 1716 wrote to memory of 1820	1716	Oski Cracked.exe	Windows Security.exe
PID 1716 wrote to memory of 4108	1716	Oski Cracked.exe	Oski Cracked.exe
PID 1716 wrote to memory of 4108	1716	Oski Cracked.exe	Oski Cracked.exe
PID 1820 wrote to memory of 96	1820	Windows Security.exe	schtasks.exe
PID 1820 wrote to memory of 96	1820	Windows Security.exe	schtasks.exe
PID 1820 wrote to memory of 96	1820	Windows Security.exe	schtasks.exe
PID 1820 wrote to memory of 4724	1820	Windows Security.exe	Windows Defender Security.exe
PID 1820 wrote to memory of 4724	1820	Windows Security.exe	Windows Defender Security.exe
PID 1820 wrote to memory of 4724	1820	Windows Security.exe	Windows Defender Security.exe
PID 1820 wrote to memory of 2164	1820	Windows Security.exe	powershell.exe
PID 1820 wrote to memory of 2164	1820	Windows Security.exe	powershell.exe
PID 1820 wrote to memory of 2164	1820	Windows Security.exe	powershell.exe
PID 4724 wrote to memory of 4132	4724	Windows Defender Security.exe	schtasks.exe
PID 4724 wrote to memory of 4132	4724	Windows Defender Security.exe	schtasks.exe
PID 4724 wrote to memory of 4132	4724	Windows Defender Security.exe	schtasks.exe
PID 1820 wrote to memory of 2936	1820	Windows Security.exe	cmd.exe
PID 1820 wrote to memory of 2936	1820	Windows Security.exe	cmd.exe
PID 1820 wrote to memory of 2936	1820	Windows Security.exe	cmd.exe
PID 2936 wrote to memory of 2300	2936	cmd.exe	cmd.exe
PID 2936 wrote to memory of 2300	2936	cmd.exe	cmd.exe
PID 2936 wrote to memory of 2300	2936	cmd.exe	cmd.exe
PID 1820 wrote to memory of 4404	1820	Windows Security.exe	cmd.exe
PID 1820 wrote to memory of 4404	1820	Windows Security.exe	cmd.exe
PID 1820 wrote to memory of 4404	1820	Windows Security.exe	cmd.exe
PID 4404 wrote to memory of 1524	4404	cmd.exe	chcp.com
PID 4404 wrote to memory of 1524	4404	cmd.exe	chcp.com
PID 4404 wrote to memory of 1524	4404	cmd.exe	chcp.com
PID 4404 wrote to memory of 3528	4404	cmd.exe	PING.EXE
PID 4404 wrote to memory of 3528	4404	cmd.exe	PING.EXE
PID 4404 wrote to memory of 3528	4404	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:1716

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:1820

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:96

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:4724

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:4132

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2164

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:2936

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
4⤵
PID:2300

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\mMqW1TOAohNa.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:4404

C:\Windows\SysWOW64\chcp.com
chcp 65001
4⤵
PID:1524

C:\Windows\SysWOW64\PING.EXE
ping -n 10 localhost
4⤵
- Runs ping.exe
PID:3528

C:\Users\Admin\AppData\Roaming\Oski Cracked.exe
"C:\Users\Admin\AppData\Roaming\Oski Cracked.exe"
2⤵
- Executes dropped EXE
PID:4108

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jv220bje.rdq.ps1
Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
C:\Users\Admin\AppData\Local\Temp\mMqW1TOAohNa.bat
Filesize
210B

MD5
9f5128c4bb2f76198f79ca9378287470

SHA1
73538f93429f074bff36aeae91c9486b3fdcd9f1

SHA256
a9b0a9a5e45996b4e789e9a1dafa482b9bbb98f2b103a7769fdc2456530f07b5

SHA512
92b21db8d3403a7dd36e05fa9fa5840e6dcfaa315a263a51d73f3cc304919809fe91382a6166353f5771ed6536ef19771a24a8224bf19d5c17364a76eb265edf

Download Submit
C:\Users\Admin\AppData\Roaming\Oski Cracked.exe
Filesize
3.6MB

MD5
41757a1965930d01d532c3f096fd8f56

SHA1
928249b731f23905cf63986d50d675b08a4b5852

SHA256
a8c6516cfc92d008e36c1ae1c9d15723e0d67f5c6c9070e2536d216f0d3058e1

SHA512
b80cebff985922c10f30dfa2ceb7b78d15927cb226bc440434bdcba15e6727b460889c9cb2583757596022b0707a59e2cf730f6fcd943b699c29ae75f6dafb88

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Security.exe
Filesize
534KB

MD5
deb0b7c057e00267baf93d2be0fd5e9f

SHA1
0938426efa7763dde948ce903b46bc88c7f8bf04

SHA256
401d7686d9400875f1ee068006e7142c1bdc1108d4ddb3113924dddb312be7d5

SHA512
e9d5986b49339fb99703d34743fec5a6522e4c2d05a81a818d58c9f15a1144d338058ebdb3076f5a683cd5bf03d01ac50156f2063450d4955f7cf854b2d1869e

Download Submit
memory/1716-18-0x00000000733D0000-0x0000000073980000-memory.dmp

Filesize
5.7MB

Download
memory/1716-1-0x00000000733D0000-0x0000000073980000-memory.dmp

Filesize
5.7MB

Download
memory/1716-3-0x00000000733D0000-0x0000000073980000-memory.dmp

Filesize
5.7MB

Download
memory/1716-0-0x00000000733D1000-0x00000000733D2000-memory.dmp

Filesize
4KB

Download
memory/1820-20-0x0000000005780000-0x0000000005812000-memory.dmp

Filesize
584KB

Download
memory/1820-286-0x0000000005750000-0x0000000005760000-memory.dmp

Filesize
64KB

Download
memory/1820-22-0x0000000005750000-0x0000000005760000-memory.dmp

Filesize
64KB

Download
memory/1820-283-0x0000000070E3E000-0x0000000070E3F000-memory.dmp

Filesize
4KB

Download
memory/1820-19-0x0000000005C80000-0x000000000617E000-memory.dmp

Filesize
5.0MB

Download
memory/1820-10-0x0000000070E3E000-0x0000000070E3F000-memory.dmp

Filesize
4KB

Download
memory/1820-23-0x0000000005820000-0x0000000005886000-memory.dmp

Filesize
408KB

Download
memory/1820-24-0x0000000006380000-0x0000000006392000-memory.dmp

Filesize
72KB

Download
memory/1820-25-0x0000000006770000-0x00000000067AE000-memory.dmp

Filesize
248KB

Download
memory/1820-16-0x0000000000E10000-0x0000000000E9C000-memory.dmp

Filesize
560KB

Download
memory/2164-37-0x0000000008240000-0x0000000008590000-memory.dmp

Filesize
3.3MB

Download
memory/2164-262-0x0000000009D10000-0x0000000009D2A000-memory.dmp

Filesize
104KB

Download
memory/2164-34-0x0000000007950000-0x0000000007F78000-memory.dmp

Filesize
6.2MB

Download
memory/2164-35-0x00000000078E0000-0x0000000007902000-memory.dmp

Filesize
136KB

Download
memory/2164-40-0x00000000081A0000-0x00000000081BC000-memory.dmp

Filesize
112KB

Download
memory/2164-41-0x00000000086D0000-0x000000000871B000-memory.dmp

Filesize
300KB

Download
memory/2164-267-0x0000000009D00000-0x0000000009D08000-memory.dmp

Filesize
32KB

Download
memory/2164-42-0x00000000089D0000-0x0000000008A46000-memory.dmp

Filesize
472KB

Download
memory/2164-33-0x00000000071E0000-0x0000000007216000-memory.dmp

Filesize
216KB

Download
memory/2164-61-0x0000000009A30000-0x0000000009A4E000-memory.dmp

Filesize
120KB

Download
memory/2164-60-0x000000006F370000-0x000000006F3BB000-memory.dmp

Filesize
300KB

Download
memory/2164-66-0x0000000009B90000-0x0000000009C35000-memory.dmp

Filesize
660KB

Download
memory/2164-59-0x0000000009A50000-0x0000000009A83000-memory.dmp

Filesize
204KB

Download
memory/2164-67-0x0000000009D60000-0x0000000009DF4000-memory.dmp

Filesize
592KB

Download
memory/2164-36-0x00000000081D0000-0x0000000008236000-memory.dmp

Filesize
408KB

Download
memory/4108-137-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/4108-134-0x000000001B730000-0x000000001BB4C000-memory.dmp

Filesize
4.1MB

Download
memory/4108-17-0x0000000000720000-0x0000000000B16000-memory.dmp

Filesize
4.0MB

Download
memory/4108-284-0x00007FFE1D623000-0x00007FFE1D624000-memory.dmp

Filesize
4KB

Download
memory/4108-285-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp

Filesize
9.9MB

Download
memory/4108-21-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp

Filesize
9.9MB

Download
memory/4108-15-0x00007FFE1D623000-0x00007FFE1D624000-memory.dmp

Filesize
4KB

Download
memory/4108-292-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/4724-39-0x00000000065F0000-0x00000000065FA000-memory.dmp

Filesize
40KB

Download