fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
29/09/2024, 04:44

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General

Target

fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Size

91KB
MD5

51475bda21ed9dab46a87d4067dd1e70
SHA1

8330b1f1c241617816dc93c2d71a6cbe5a2c27b1
SHA256

fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd
SHA512

fd3d8768f3e4f2a8ba17b6668ccd0590bdcfb73274b0c2d8ea1fcc92d961c84d624785feb95463612180154d21ac75ee37a886fbda8b9ced366eee822b7972e7
SSDEEP

1536:QRsjdIZfaif4YrxCjjKnouy8VzyRsjdIZfaif4YrxCjjKnouy8VzK:QOyZy9wCjOouttyOyZy9wCjOouttK

Score

10^/10

discovery evasion persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Disables RegEdit via registry modification 2 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Executes dropped EXE 7 IoCs

pid	Process
2628	xk.exe
2380	IExplorer.exe
1600	WINLOGON.EXE
1560	CSRSS.EXE
2936	SERVICES.EXE
344	LSASS.EXE
660	SMSS.EXE

Loads dropped DLL 12 IoCs

pid	Process
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Modifies system executable filetype association 2 TTPs 13 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\shell.exe	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
File created	C:\Windows\SysWOW64\shell.exe	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
File created	C:\Windows\SysWOW64\Mig2.scr	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

UPX packed file 18 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2084-0-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/files/0x000700000001907c-8.dat	upx
behavioral1/files/0x00080000000193a8-109.dat	upx
behavioral1/files/0x0005000000019d69-113.dat	upx
behavioral1/memory/2380-123-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/memory/2628-116-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/memory/2380-127-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/files/0x0005000000019f71-128.dat	upx
behavioral1/memory/1600-137-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/files/0x000500000001a020-138.dat	upx
behavioral1/memory/2084-140-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/memory/1560-151-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/files/0x000500000001a033-148.dat	upx
behavioral1/memory/2936-160-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/memory/344-171-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/files/0x000500000001a05a-167.dat	upx
behavioral1/memory/660-184-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral1/memory/2084-185-0x0000000000400000-0x000000000042F000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\xk.exe	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
File created	C:\Windows\xk.exe	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SMSS.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	IExplorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINLOGON.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CSRSS.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SERVICES.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	LSASS.EXE

Modifies Control Panel 4 IoCs

evasion

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\Desktop\	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
2628	xk.exe
2380	IExplorer.exe
1600	WINLOGON.EXE
1560	CSRSS.EXE
2936	SERVICES.EXE
344	LSASS.EXE
660	SMSS.EXE

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2628	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	30
PID 2084 wrote to memory of 2628	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	30
PID 2084 wrote to memory of 2628	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	30
PID 2084 wrote to memory of 2628	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	30
PID 2084 wrote to memory of 2380	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	31
PID 2084 wrote to memory of 2380	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	31
PID 2084 wrote to memory of 2380	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	31
PID 2084 wrote to memory of 2380	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	31
PID 2084 wrote to memory of 1600	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	32
PID 2084 wrote to memory of 1600	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	32
PID 2084 wrote to memory of 1600	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	32
PID 2084 wrote to memory of 1600	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	32
PID 2084 wrote to memory of 1560	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	33
PID 2084 wrote to memory of 1560	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	33
PID 2084 wrote to memory of 1560	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	33
PID 2084 wrote to memory of 1560	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	33
PID 2084 wrote to memory of 2936	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	34
PID 2084 wrote to memory of 2936	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	34
PID 2084 wrote to memory of 2936	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	34
PID 2084 wrote to memory of 2936	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	34
PID 2084 wrote to memory of 344	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	35
PID 2084 wrote to memory of 344	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	35
PID 2084 wrote to memory of 344	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	35
PID 2084 wrote to memory of 344	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	35
PID 2084 wrote to memory of 660	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	36
PID 2084 wrote to memory of 660	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	36
PID 2084 wrote to memory of 660	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	36
PID 2084 wrote to memory of 660	2084	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe	36

System policy modification 1 TTPs 4 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe

C:\Users\Admin\AppData\Local\Temp\fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe
"C:\Users\Admin\AppData\Local\Temp\fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Disables RegEdit via registry modification
- Loads dropped DLL
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2084
- C:\Windows\xk.exe
  C:\Windows\xk.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2628
- C:\Windows\SysWOW64\IExplorer.exe
  C:\Windows\system32\IExplorer.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2380
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1600
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1560
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2936
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:344
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

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Downloads

C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE

Filesize
91KB

MD5
cfbc99334c63f46944f4a7a7c81ecebb

SHA1
ad1610c7f70dcb7033e4b29a3197bc7e70ba930e

SHA256
4935f231eed54b81294ca3122f6231a414d189c164e66d13ccfb97f9e8a678e6

SHA512
458dfced561f1a163f892a8237c9228d0a0ef5848aaf452cf222d85ab36dd2d4dcf917ae0e49be2b8e8c1dff7b3afdb0ff112481df7ce4b0d4441f512403d5db

Download Submit
C:\Users\Admin\AppData\Local\winlogon.exe

Filesize
91KB

MD5
51475bda21ed9dab46a87d4067dd1e70

SHA1
8330b1f1c241617816dc93c2d71a6cbe5a2c27b1

SHA256
fc3af4fd3687b13525113ba63a7591ef50e6a32f4d260b0891db8f80e01cffbd

SHA512
fd3d8768f3e4f2a8ba17b6668ccd0590bdcfb73274b0c2d8ea1fcc92d961c84d624785feb95463612180154d21ac75ee37a886fbda8b9ced366eee822b7972e7

Download Submit
C:\Windows\xk.exe

Filesize
91KB

MD5
8373c9d048f896195caa7a9857d8ad4b

SHA1
e901a87244dc4215cc0b1cf01ef3797d9b329a98

SHA256
bd6f8b3b29f513f309e5d0bec9d056c4d399ebb31a0b461b82f2435650dace27

SHA512
f24a129a7b1027810d92e413fcf2e918abf6d5184311a55f4bcbc6e7dfc6f025916a620c181a1f7cc78bc23b7fea55f4dd7d7ccc871d96ee50567eb09f7455b7

Download Submit
\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE

Filesize
91KB

MD5
af72f18d195cc22c73289602892a28f3

SHA1
bdf5d791b86405ed5db7484d2f7e5100ae1a3d2f

SHA256
2a8fc4d794038cfdde0c6c8da836f1bc3a87f611506f1a4ebd54bf49db327032

SHA512
f3090ad6ee4aac2bcfdc3b644181ec59a97f84b861798253d16a00789a7c635db6f22c5d2e0d9b465bf94318404b6821f0303459fb22be79efc79cc767067fb5

Download Submit
\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE

Filesize
91KB

MD5
5659a5e2f186959bb2106c0a25bd3899

SHA1
3f221dcfeabc5a1a89752a4d276b17a600af65c7

SHA256
e9f76274b4146fac30f12f514c8d37074e0da157d4e4dbe13bc158189e38642a

SHA512
55e34d1bee85d2b1857f47201c223340e83589b69e2e0f1f8f204fec395f624eb023bf6f1cf0f48b9d1a32bb35dc6ae570ac1cf0fa1fd542f00c210a2a060f7b

Download Submit
\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE

Filesize
91KB

MD5
0ab61620b6d91b6457c10cec778dd487

SHA1
20a1089504ea77afc1aad55460188e26d846deab

SHA256
3e3268c9d60f1d0aed2884365bbeae4ce31fd5de7f2ee90c73bd697a69186d2f

SHA512
9144e64a7b159c274445fbd0ccddd0edff65134e5bfc32b5d0c58920180a3bcd3d5166c6507fe3dc68a66ca48e25924035c96c1ae85b0d611fbb10d14ebe105e

Download Submit
\Windows\SysWOW64\IExplorer.exe

Filesize
91KB

MD5
c0428a99aeea57b59c3a9bb150bf4f4e

SHA1
73ae85cf6ba230691f34141ad68b2249361b90d4

SHA256
834e8aa4f913e09ba08ec35a8219ebb279305cbb8cf36dea4d0d617c735e0ce5

SHA512
45ee7cdade5e83a117992ab43c4922fa97bb19f2a354258455db53b6486aaaa34186a5d9dafeeff774d0e27105b0f5260f878dea8ab7e0224f6b3b91cf99fef4

Download Submit
memory/344-171-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/660-184-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1560-151-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1600-137-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2084-122-0x00000000004B0000-0x00000000004DF000-memory.dmp

Filesize
188KB

Download
memory/2084-140-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2084-156-0x00000000004B0000-0x00000000004DF000-memory.dmp

Filesize
188KB

Download
memory/2084-0-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2084-179-0x00000000004B0000-0x00000000004DF000-memory.dmp

Filesize
188KB

Download
memory/2084-110-0x00000000004B0000-0x00000000004DF000-memory.dmp

Filesize
188KB

Download
memory/2084-185-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2380-127-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2380-123-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2628-116-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2936-160-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download