9ecbf28720a944bdd3f3c20cdb3f4da7f40da903b651be520348e01a8efa2504

Analysis

max time kernel
119s
max time network
142s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
13/04/2024, 17:32

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General

Target
kayflock-beta/kayflock.exe
Size 253KB
Sample240413-v4rrmsab8v
SHA256 7a25def99b85f8486606ec7eb4d52395308afcc930e7b2df23897022b1d6baf1
MD5 2ea6211ab19482dddf2b32fdeddfe409
SHA1 bfb9ab42d59ec933d1ebb8674bc697faaa99a52e
SHA512 e54d8b6db035ab9274c3f3a00474cf19d1543eb19f1c8eb89e11e33ddc6d675648201a70f495e6ddc0da4d71f17f01e3f6d77d5264effe1f0c46877379933bae
SSDEEP 3072:yczkitvo4BpYN/6mBPry8TXROLdW5m4mURh9OOGm0kqxidvA8qY:yA4NCmBPry/N2VOOPwxU1q
MD5 SHA1 SHA512 SSDEEP

Score

1^/10

Malware Config

Signatures

Modifies Internet Explorer settings 1 TTPs 34 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000112dd71d930ff24b8b2b71a2c228122b000000000200000000001066000000010000200000000d29f8c39f338025af0c373d429bbaf1242a54b8b1e14cfb063eab44b63b069c000000000e8000000002000020000000378a7071b0a63eff4dc4f291623f1dbf2b81fe23c7b79d38e816c6d2f3625eda20000000deb3f69eb5056bb34ad1070691334ca278371adb364e054674e82176473fbac840000000805f348822c08033db468d2d299b990324bbeeff3199410477488b83a471e1b0f5d6ed1234988041df4bee5b8d11933f463f0318ee12c8107fb6e9851feea705	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{0758CCA1-F9BC-11EE-8859-DE62917EBCA6} = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\SearchScopes\DownloadRetries = "2"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\SearchScopes	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "419191516"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 4092a2dfc88dda01	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2828	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2828	iexplore.exe
2828	iexplore.exe
2936	IEXPLORE.EXE
2936	IEXPLORE.EXE
2936	IEXPLORE.EXE
2936	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2784 wrote to memory of 2828	2784	kayflock.exe	28
PID 2784 wrote to memory of 2828	2784	kayflock.exe	28
PID 2784 wrote to memory of 2828	2784	kayflock.exe	28
PID 2828 wrote to memory of 2936	2828	iexplore.exe	30
PID 2828 wrote to memory of 2936	2828	iexplore.exe	30
PID 2828 wrote to memory of 2936	2828	iexplore.exe	30
PID 2828 wrote to memory of 2936	2828	iexplore.exe	30

C:\Users\Admin\AppData\Local\Temp\kayflock-beta\kayflock.exe
"C:\Users\Admin\AppData\Local\Temp\kayflock-beta\kayflock.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2784
- C:\Program Files\Internet Explorer\iexplore.exe
  "C:\Program Files\Internet Explorer\iexplore.exe" https://aka.ms/dotnet-core-applaunch?missing_runtime=true&arch=x64&rid=win7-x64&apphost_version=6.0.28&gui=true
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2828
- - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
    "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2828 CREDAT:275457 /prefetch:2
    3⤵
    - Modifies Internet Explorer settings
    - Suspicious use of SetWindowsHookEx
    PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact