amadey | 17cd3ca10dac74d91fec42c4ba91f36da04085f6ea6c3a0142a47028dae7750e

Modify Existing Service

T1031

Disabling Security Tools

T1089

Processes:

ns3773SK.exepy65IL51.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	ns3773SK.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	ns3773SK.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableIOAVProtection = "1"	ns3773SK.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	py65IL51.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableIOAVProtection = "1"	py65IL51.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	py65IL51.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	ns3773SK.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	ns3773SK.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	ns3773SK.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	py65IL51.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	py65IL51.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	py65IL51.exe

RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

Processes:

ry83nx03.exelegenda.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	ry83nx03.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	legenda.exe

Executes dropped EXE 8 IoCs

Processes:

will8337.exewill8869.exens3773SK.exepy65IL51.exeqs4818om.exery83nx03.exelegenda.exelegenda.exe

pid process

4616 will8337.exe
3432 will8869.exe
4120 ns3773SK.exe
3672 py65IL51.exe
4764 qs4818om.exe
1044 ry83nx03.exe
3728 legenda.exe
4380 legenda.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

4908 rundll32.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

pid	process
4616	will8337.exe
3432	will8869.exe
4120	ns3773SK.exe
3672	py65IL51.exe
4764	qs4818om.exe
1044	ry83nx03.exe
3728	legenda.exe
4380	legenda.exe

pid	process
4908	rundll32.exe

Windows security modification 2 TTPs 3 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

Processes:

ns3773SK.exepy65IL51.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features\TamperProtection = "0"	ns3773SK.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	py65IL51.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	py65IL51.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

will8869.exe02a28c37fd718954b067cde7574670eb.exewill8337.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	will8869.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup2 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP002.TMP\\\""	will8869.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	02a28c37fd718954b067cde7574670eb.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	02a28c37fd718954b067cde7574670eb.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	will8337.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup1 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP001.TMP\\\""	will8337.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in System32 directory 2 IoCs

Processes:

svchost.exe

description	ioc	process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{2B440ABC-6759-47F3-BE46-268E7044DFB1}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{A6FA3B27-539B-4607-8318-EC2CE753BBDD}.catalogItem	svchost.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3164 3672 WerFault.exe py65IL51.exe

pid	pid_target	process	target process
3164	3672	WerFault.exe	py65IL51.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

svchost.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

768 schtasks.exe

pid	process
768	schtasks.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

Processes:

svchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

ns3773SK.exepy65IL51.exeqs4818om.exe

pid process

4120 ns3773SK.exe
4120 ns3773SK.exe
3672 py65IL51.exe
3672 py65IL51.exe
4764 qs4818om.exe
4764 qs4818om.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

ns3773SK.exepy65IL51.exeqs4818om.exe

description pid process

Token: SeDebugPrivilege 4120 ns3773SK.exe
Token: SeDebugPrivilege 3672 py65IL51.exe
Token: SeDebugPrivilege 4764 qs4818om.exe

pid	process
4120	ns3773SK.exe
4120	ns3773SK.exe
3672	py65IL51.exe
3672	py65IL51.exe
4764	qs4818om.exe
4764	qs4818om.exe

description	pid	process
Token: SeDebugPrivilege	4120	ns3773SK.exe
Token: SeDebugPrivilege	3672	py65IL51.exe
Token: SeDebugPrivilege	4764	qs4818om.exe

Suspicious use of WriteProcessMemory 47 IoCs

Processes:

02a28c37fd718954b067cde7574670eb.exewill8337.exewill8869.exery83nx03.exelegenda.execmd.exe

description	pid	process	target process
PID 2364 wrote to memory of 4616	2364	02a28c37fd718954b067cde7574670eb.exe	will8337.exe
PID 2364 wrote to memory of 4616	2364	02a28c37fd718954b067cde7574670eb.exe	will8337.exe
PID 2364 wrote to memory of 4616	2364	02a28c37fd718954b067cde7574670eb.exe	will8337.exe
PID 4616 wrote to memory of 3432	4616	will8337.exe	will8869.exe
PID 4616 wrote to memory of 3432	4616	will8337.exe	will8869.exe
PID 4616 wrote to memory of 3432	4616	will8337.exe	will8869.exe
PID 3432 wrote to memory of 4120	3432	will8869.exe	ns3773SK.exe
PID 3432 wrote to memory of 4120	3432	will8869.exe	ns3773SK.exe
PID 3432 wrote to memory of 3672	3432	will8869.exe	py65IL51.exe
PID 3432 wrote to memory of 3672	3432	will8869.exe	py65IL51.exe
PID 3432 wrote to memory of 3672	3432	will8869.exe	py65IL51.exe
PID 4616 wrote to memory of 4764	4616	will8337.exe	qs4818om.exe
PID 4616 wrote to memory of 4764	4616	will8337.exe	qs4818om.exe
PID 4616 wrote to memory of 4764	4616	will8337.exe	qs4818om.exe
PID 2364 wrote to memory of 1044	2364	02a28c37fd718954b067cde7574670eb.exe	ry83nx03.exe
PID 2364 wrote to memory of 1044	2364	02a28c37fd718954b067cde7574670eb.exe	ry83nx03.exe
PID 2364 wrote to memory of 1044	2364	02a28c37fd718954b067cde7574670eb.exe	ry83nx03.exe
PID 1044 wrote to memory of 3728	1044	ry83nx03.exe	legenda.exe
PID 1044 wrote to memory of 3728	1044	ry83nx03.exe	legenda.exe
PID 1044 wrote to memory of 3728	1044	ry83nx03.exe	legenda.exe
PID 3728 wrote to memory of 768	3728	legenda.exe	schtasks.exe
PID 3728 wrote to memory of 768	3728	legenda.exe	schtasks.exe
PID 3728 wrote to memory of 768	3728	legenda.exe	schtasks.exe
PID 3728 wrote to memory of 384	3728	legenda.exe	cmd.exe
PID 3728 wrote to memory of 384	3728	legenda.exe	cmd.exe
PID 3728 wrote to memory of 384	3728	legenda.exe	cmd.exe
PID 384 wrote to memory of 5112	384	cmd.exe	cmd.exe
PID 384 wrote to memory of 5112	384	cmd.exe	cmd.exe
PID 384 wrote to memory of 5112	384	cmd.exe	cmd.exe
PID 384 wrote to memory of 1660	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 1660	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 1660	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 552	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 552	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 552	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 3860	384	cmd.exe	cmd.exe
PID 384 wrote to memory of 3860	384	cmd.exe	cmd.exe
PID 384 wrote to memory of 3860	384	cmd.exe	cmd.exe
PID 384 wrote to memory of 4708	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 4708	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 4708	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 3176	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 3176	384	cmd.exe	cacls.exe
PID 384 wrote to memory of 3176	384	cmd.exe	cacls.exe
PID 3728 wrote to memory of 4908	3728	legenda.exe	rundll32.exe
PID 3728 wrote to memory of 4908	3728	legenda.exe	rundll32.exe
PID 3728 wrote to memory of 4908	3728	legenda.exe	rundll32.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\02a28c37fd718954b067cde7574670eb.exe
"C:\Users\Admin\AppData\Local\Temp\02a28c37fd718954b067cde7574670eb.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2364

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\will8337.exe
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\will8337.exe
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4616

C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\will8869.exe
C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\will8869.exe
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3432

C:\Users\Admin\AppData\Local\Temp\IXP002.TMP\ns3773SK.exe
C:\Users\Admin\AppData\Local\Temp\IXP002.TMP\ns3773SK.exe
4⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4120

C:\Users\Admin\AppData\Local\Temp\IXP002.TMP\py65IL51.exe
C:\Users\Admin\AppData\Local\Temp\IXP002.TMP\py65IL51.exe
4⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3672 -s 1084
5⤵
- Program crash
PID:3164

C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\qs4818om.exe
C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\qs4818om.exe
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4764

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\ry83nx03.exe
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\ry83nx03.exe
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1044

C:\Users\Admin\AppData\Local\Temp\f22b669919\legenda.exe
"C:\Users\Admin\AppData\Local\Temp\f22b669919\legenda.exe"
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3728

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 1 /TN legenda.exe /TR "C:\Users\Admin\AppData\Local\Temp\f22b669919\legenda.exe" /F
4⤵
- Creates scheduled task(s)
PID:768

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k echo Y|CACLS "legenda.exe" /P "Admin:N"&&CACLS "legenda.exe" /P "Admin:R" /E&&echo Y|CACLS "..\f22b669919" /P "Admin:N"&&CACLS "..\f22b669919" /P "Admin:R" /E&&Exit
4⤵
- Suspicious use of WriteProcessMemory
PID:384

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /S /D /c" echo Y"
5⤵
PID:5112

C:\Windows\SysWOW64\cacls.exe
CACLS "legenda.exe" /P "Admin:N"
5⤵
PID:1660

C:\Windows\SysWOW64\cacls.exe
CACLS "legenda.exe" /P "Admin:R" /E
5⤵
PID:552

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /S /D /c" echo Y"
5⤵
PID:3860

C:\Windows\SysWOW64\cacls.exe
CACLS "..\f22b669919" /P "Admin:N"
5⤵
PID:4708

C:\Windows\SysWOW64\cacls.exe
CACLS "..\f22b669919" /P "Admin:R" /E
5⤵
PID:3176

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\a091ec0a6e2227\clip64.dll, Main
4⤵
- Loads dropped DLL
PID:4908

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:2452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3672 -ip 3672
1⤵
PID:216

C:\Users\Admin\AppData\Local\Temp\f22b669919\legenda.exe
C:\Users\Admin\AppData\Local\Temp\f22b669919\legenda.exe
1⤵
- Executes dropped EXE
PID:4380

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

Disabling Security Tools

T1089

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

System Information Discovery