2eaccf2ffad0c83282b940b5ed1e65f38acacc9e002b48e3bf4f852e1097232a

Resubmissions

05/02/2025, 08:52 UTC

250205-ksw7wa1kap 10

15/03/2024, 21:38 UTC

240315-1hdksabg4x 10

Analysis

max time kernel
118s
max time network
127s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15/03/2024, 21:38 UTC

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General

Target

ransomwares/Krotten/Krotten.exe
Size

53KB
MD5

87ccd6f4ec0e6b706d65550f90b0e3c7
SHA1

213e6624bff6064c016b9cdc15d5365823c01f5f
SHA256

e79f164ccc75a5d5c032b4c5a96d6ad7604faffb28afe77bc29b9173fa3543e4
SHA512

a72403d462e2e2e181dbdabfcc02889f001387943571391befed491aaecba830b0869bdd4d82bca137bd4061bbbfb692871b1b4622c4a7d9f16792c60999c990
SSDEEP

768:4yKoNLsn4Jp9ZvRInygrpMoZN+WtOl08jxBEHCDwBLpZTPCUvQK:j/sn4/OycxZN+MKxp8t9zQK

Score

8^/10

evasion persistence

Malware Config

Signatures

Disables RegEdit via registry modification 2 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Krotten.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Krotten.exe

Disables Task Manager via registry modification
evasion

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\WINDOWS\\Web\\rundll32.exe"	Krotten.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AVPCC = "C:\\WINDOWS\\Cursors\\avp.exe"	Krotten.exe

Modifies WinLogon 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\LegalNoticeCaption = "DANGER"	Krotten.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\LegalNoticeText = "Äëÿ òîãî ÷òîáû âîññòàíîâèòü íîðìàëüíóþ ðàáîòó ñâîåãî êîìïüþòåðà íå ïîòåðÿâ ÂÑÞ èíôîðìàöèþ! È ñ ýêîíîìèâ äåíüãè, ïðèøëè ìíå íà e-mail wordsia@notrix.de êîä ïîïîëíåíèÿ ñ÷åòà êèåâñòàð íà 25 ãðèâåíü. Â îòâåò â òå÷åíèå äâåíàäöàòè ÷àñîâ íà ñâîé e-mail òû ïîëó÷èøü ôàèë äëÿ óäàëåíèÿ ýòîé ïðîãðàììû."	Krotten.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\WINDOWS\Web	Krotten.exe

Modifies Control Panel 6 IoCs

evasion

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Control Panel\International\sTimeFormat = "ÕÓÉ"	Krotten.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Control Panel\Desktop	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Control Panel\Desktop\WallpaperOriginX = "210"	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Control Panel\Desktop\WallpaperOriginY = "187"	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Control Panel\Desktop\MenuShowDelay = "9999"	Krotten.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Control Panel\International	Krotten.exe

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Internet Explorer\Main	Krotten.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Window title = ":::::::::::::::::: ÌÎÉ ÕÓÉ ÏÐÎÒÓÕ À ÏÈÇÄÀ ÃÍÈÅÒ ::::::::::::::::::"	Krotten.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main\Window title = ":::::::::::::::::: ÌÎÉ ÕÓÉ ÏÐÎÒÓÕ À ÏÈÇÄÀ ÃÍÈÅÒ ::::::::::::::::::"	Krotten.exe

Modifies Internet Explorer start page 1 TTPs 2 IoCs

stealer

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Start Page = "http://poetry.rotten.com/lightning/"	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main\Start Page = "http://poetry.rotten.com/lightning/"	Krotten.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\REGFILE\SHELL\OPEN\COMMAND	Krotten.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeSystemtimePrivilege	1252	Krotten.exe
Token: SeSystemtimePrivilege	1252	Krotten.exe
Token: SeSystemtimePrivilege	1252	Krotten.exe

System policy modification 1 TTPs 37 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoLogOff = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoClose = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoNetHood = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr = "1"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSMMyPictures = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoControlPanel = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoRun = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSMMyDocs = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoViewOnDrive = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoPrinters = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\NoDispCPL = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDesktop = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDrives = "1044"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoUserNameInStartMenu = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoCommonGroups = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoToolbarCustomize = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoPrinterTabs = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Uninstall\NoAddRemovePrograms = "1"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuMFUprogramsList = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoRecentDocsMenu = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFavoritesMenu = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\NonEnum\{20D04FE0-3AEA-1069-A2D8-08002B30309D} = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuSubFolders = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoActiveDesktop = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFind = "1"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\NonEnum	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\NonEnum\{450D8FBA-AD25-11D0-98A8-0800361B1103} = "1"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Uninstall	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuPinnedList = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuMyMusic = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoThemesTab = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSaveSettings = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSMHelp = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoManageMyComputerVerb = "1"	Krotten.exe

C:\Users\Admin\AppData\Local\Temp\ransomwares\Krotten\Krotten.exe
"C:\Users\Admin\AppData\Local\Temp\ransomwares\Krotten\Krotten.exe"
1⤵
- Disables RegEdit via registry modification
- Adds Run key to start application
- Modifies WinLogon
- Drops file in Windows directory
- Modifies Control Panel
- Modifies Internet Explorer settings
- Modifies Internet Explorer start page
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- System policy modification
PID:1252

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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